Mónica Calero

• University of Granada

This contribution presents a multidisciplinary approach that encompasses contextualization, photographic, and graphic documentation, as well as a comprehensive characterization scheme focusing on the morphological, chemical, structural, and electronic aspects of the red panels from two significant archeological sites: Cástulo and Isturgi. The red p...

Plastic waste management is a current environmental issue that demands potential solutions since complete mechanical recycling is limited to the complexity and feasibility regarding the quality and purity of plastic waste. Pyrolysis has emerged as a reasonable solution for the recycling of those fractions that are not further suitable for recycling...

Several sepiolite-based catalysts have been prepared and investigated for pyrolytic H2 production from a post-consumer mixture of residual plastics. The experimental installation involved a two-stage reaction system: first, the plastic mixture was thermally pyrolyzed at 500 ºC; then, the generated volatiles were reformed by increasing the temperatu...

A sulfur-based COF has been combined with graphitic carbon nitride (CN) in microwave-assisted synthesis to build a COF-CN heterostructure with enhanced photocatalytic activity. The prepared COF-CN were fully characterized, analyzing the textural (N2 isotherms), structural (XRD and FTIR), chemical (elemental analysis and XPS), morphological (HR-STEM...

The rejected fraction of post-consumer plastics collected by mechanical sorting is a source of chemical recycling by processes such as pyrolysis, promoting the circular economy. The char residue produced in this process has been valorized, reinforcing the introduction in the consumption chain, as an adsorbent aimed at the upgrading of a biogas stre...

This work reports the modification of graphitic carbon nitride (CN) through sulfonation (SCN) as an enhanced strategy for photocatalytic activity during the oxidation of benzyl alcohol to benzaldehyde. CN was prepared from melamine and functionalized with -SO3H groups using different doses of chlorosulfonic acid. The textural, structural, morpholog...

Photocatalysis has emerged as an environmentally friendly technology to develop selective reactions such as the oxidation of alcohol to aldehydes. Graphitic carbon nitride (CN) is a metal-free polymeric structure easily photoactivated under radiation. This work focuses on the enhancement of the photocatalytic activity of bare CN by doping it with p...

The contribution provides a valorization alternative for rejected plastic wastes from mechanical-biological treatment (non-recyclable material) via an in-situ catalytic pyrolysis process focused on the production of a liquid fraction with similar properties to traditional fuels (i.e., gasoline, kerosine, and diesel). According to the ASTM recommend...

The selective oxidation of added-value aromatic alcohols into aldehydes of high interest via photocatalysis has been postulated as a green and competitive oxidative reaction at mild conditions. This work is focused on the design of a tertiary graphitic carbon nitride (g-C3N4) based photocatalysts competitive for the photocatalytic production of ben...

The use of disposable personal protective equipment (PPE) as a control measure to avoid transmission against COVID-19 has generated a challenge to the waste management and enhances plastic pollution in the environment. The research aims to monitor the presence of PPE waste and other plastic debris, in a time interval where the use of face mask at s...

Chemical recycling by pyrolysis of plastic waste has been considered a potential approach. However, little attention has been paid to the reuse of the char residue generated. The preparation of materials from char residue obtained from the pyrolysis process has become an essential task. The purpose of this work is the preparation of activated carbo...

In circular economy, useful plastic materials are kept in circulation as opposed to being landfilled, incinerated, or leaked into the natural environment. Pyrolysis is a chemical recycling technique useful for unrecyclable plastic wastes that produce gas, liquid (oil), and solid (char) products. Although the pyrolysis technique has been extensively...

Different plastics recovered from a local urban solid waste plant were collected before landfilling, separated, and classified by families, i.e. polyethylene (PE), polypropylene (PP), high impact and expanded polystyrene (HIPS and EPS, respectively), polyethylene terephthalate (PET), and polyvinyl chloride (PVC). A systematic pyrolysis study was ca...

In this work, the thermal and catalytic pyrolysis of different types of plastic waste and a real mixture were investigated in a fixed-bed reactor over different catalysts (CaO, MgO, HY, HZSM-5). Important differences in gas, liquid, and solid yields were found as a function of polymer type. The highest gas yield was obtained with expanded polystyre...

An environmentally friendly solvent-free approach was tested using spent coffee as a biomass sacrificial template for the preparation of TiO2 modified with CeOx. The use of coffee as a template pursues the preparation of a nanostructured heterojunction without the need for a solvent. Two variables were optimized in the synthesis process, i.e. calci...

This work focuses on the use of a char produced during the pyrolysis of a mixture of non-recyclable plastics as a precursor for the preparation of porous activated carbon with high developed adsorption uptake of lead in water. Physical and chemical activation was used to enhance the porosity, surface area, and surface chemistry of char. The final a...

In this work, a complete sorting and characterization of dirty non-recyclable mixed plastic (plasmix fraction) from municipal solid waste was performed. The procedure comprised a visual inspection and identification of the materials presented in the mixed plastic bales, and subsequent moisture and dirt content determination. Afterwards, both polypr...

Mechanical recycling of plastic waste is a common practice in industry and is an environmental solution to the problem of plastics disposal. In this article, a case study of mechanical recycling of post-consumer polyethylene flexible films in Granada (Spain) was analyzed from an environmental point of view by the Life-Cycle Assessment methodology....

Background The aim of this study was the optimization of hydrothermal treatments for the extraction of value-added products from olive cake concretely, polyphenols, polyalcohols and furfural. For this purpose, this work used a new and environmental-friendly process with olive cake which only was used in a previous study. Methods Different hydrothe...

In this study, thermal pyrolysis of a real mixture of plastic wastes collected from municipal solid waste of Granada (Spain) was performed to obtain a liquid oil. The goals of the present study were: 1) identify the optimal conditions to obtain maximum yields of the liquid fraction, 2) experimentally measure basic characteristic parameters of pyrol...

The establishment of a method of separation of materials from Tetra Pak waste to obtain products for use as raw material, fuel or other purposes was investigated in this study. First, the feasibility of hydrothermal treatment for the production of a solid fuel (hydrochar) and solid fraction formed by polyethylene and aluminum, called composite was...

Spain is the world’s largest olive growing country. Olive oil is considered a very healthy product, particularly in Mediterranean areas. Olive oil is produced from the olive that is the fruit of the olive tree. However, industries dedicated to olive-oil production (olive mills, olive pomace extraction plants, between others) generate a great amount...

The excessive use of plastic in our society is causing a massive accumulation, since it is a non-biodegradable product and with still poor recycling rates. This effect can be observed in the seas, which more and more plastic waste are accumulating. The present work is a critical review, based on all currently available literature, that reports envi...

In this work, the pyrolysis of post-consumer mixed plastic waste (polypropylene (PP), polystyrene (PS) and polyethylene film (PE)) is carried out. The solid product of the pyrolysis is characterized and tested for its use as adsorbent of lead present in aqueous media. The pyrolysis temperature has a great influence on the solid product yield, decre...

Microplastics are ubiquitous in almost all environments, including freshwater, seawater, and coastal environments. Recently, researches about microplastics have increased due to their serious ecological and health impacts. In this chapter, firstly, the sources of microplastics are summarized. Then, the most important techniques for sampling, extrac...

In this work, the impacts of temperature, equivalence ratio, contact-time, and torrefaction on air gasification of olive cake at low temperatures were experimentally investigated. Both raw and hydrolysed olive cake feedstocks were considered. The yields of main fuel gas products, the gas LHV, and cold gas efficiency (CGE) were adopted as the indica...

The bio-oil properties and yields during pyrolysis at 400, 500 and 600 °C of the residues from the cultivation of the pepper in greenhouse (Capsicum annuum L.) were studied. Different solid samples were investigated: the biomass fraction of the residue, the water-washed biomass sample, the cobalt-loaded biomass sample and three mixtures made with t...

In this work, liquid hot water pretreatment (autohydrolysis) was used to improve enzymatic hydrolysis of a commonly consumed vegetable waste in Spain, Italian green pepper, to finally produce fermentable sugars. Firstly, the effect of temperature and contact time on sugar recovery during pretreatment (in insoluble solid and liquid fraction) was stu...

Fluorite is an important industrial mineral composed of calcium and fluorine (CaF2). This mineral is widely distributed through different deposits. However, in most cases, fluorite is tightly associated with gangue, such as calcite and quartz. In this paper, different depressants are tested in the flotation of fluorite in two different laboratory c...

Bisphenol A (BPA) is an extensively produced and consumed chemical in the world. Due to its widespread use, contamination by this pollutant has increased in recent years, reaching a critical environmental point. This work investigates the feasibility of bisphenol A adsorption from industrial wastewater solutions, testing the reduction of bisphenol...

The formation of slime particles in processes of minerals grinding limits froth flotation. Minera de Orgiva S.L. (Spain) produces slime sludge containing 41.05% of CaF2 from a fluorite ore. Slimes have a very small particle diameter with very high specific surface area making this material difficult to process by froth flotation even when the grade...

In this study, two new collectors for fluorite flotation DP-OMC-1033 (DP-I) and DP-OMC-1234 (DP-II) were tested and compared with oleic acid (OA), sodium oleate (SO) and potassium oleate (PO). According to fluorite grade and fluorite metallurgical recovery, the effect of each collector was determined, both in mechanical and pneumatic cell flotation...

The excessive consumption of plastic films in many applications due to their lightness and versatility and the low recycling rate of this type of material is a very significant matter that increases the problem of plastic film pollution. Plastic recycling has been a popular topic in conferences and technical journals during the past few years, but...

Olive cake, a solid waste resulting of olive-oil industry, was recycled as an adsorbent material for the decontamination of real fertilizer industry wastewater. Particularly, adsorption behaviour of the system working with columns in series and the effect of flow rate on the removal of copper were studied. The material exhibited a good adsorption c...

Microplastics have been converted a very important issue during current time. In addition, their capacity to adsorb other pollutants implies an additional problem. In this work, the potential of five types of microplastics derived from plastic waste, that include polyethylene, polyethylene terephthalate, polypropylene, polystyrene and polyvinyl chl...

This work presents a study of the separation and recovery of metal elements, through a multi-step protocol based on solvent extraction, stripping and chemical precipitation processes. The waste leachate was produced during the treatment of the mixed solid waste from the decommissioning of a coal-fired power plant. The organophosphorus acid, di-(2-e...

Microplastics can adsorb chemical pollutants such as metals or pharmaceuticals, and transferred them along the food chain. In this work, an investigation of the adsorption of Cd, Co, Cr, Cu, Ni, Pb and Zn by five different types of microplastics was performed in Milli-Q water and natural waters (seawater, urban wastewater and irrigation water) via...

This research aims to optimize the hydrothermal pretreatment based on previous studies, with the objective of extracting and determining value-added products from olive cake, and improve the energy solid properties. For this purpose, a hydrothermal pretreatment following of an autohydrolysis of the resulting solid were carried out in a biorefinery...

The plastics have produced a lot of serious environmental problems because there are large quantities of which the majority ends up in landfills or even in the seas. In addition, they are produced from exhaustible fossil fuels. For these reasons, recycling plastics is an alternative which may reduce environmental problems and resource depletion. Cu...

The current environmental problems that threaten our society can only be mitigated with a radical change in the paradigm of production and consumption. Recycling waste is a key element in this. This work has focused on the valorization of a widely spread agricultural waste: the so-called ‘alperujo’ (olive pomace). For the first time, olive pomace (...

This study examines the possibility of using plastic film waste presented in municipal solid waste as a fuel. There is a large amount of this waste that is currently not treated and ends up in landfills aggravating the global problem of marine and land pollution. A pyrolysis process was performed on this plastic waste to obtain a liquid fuel. For t...

The thermal decomposition of three biomass residues was studied in this work: cork powder, paper sludge and sewage sludge. Firstly, characterization of the materials was carried out by elemental and proximate analysis and FT-IR spectroscopy. Experiments were carried out in a thermobalance to obtain thermogravimetric curves (TG) and differential the...

In this study, the removal of zinc from plating wastewaters using fixed bed columns packed with hydrolyzed olive cake was investigated. This work discusses the significance of the scale-up and provides a brief overview of the potential uses of exhausted biosorbent for the generation of zinc-based materials. First, biosorption studies were performed...

Plastic pollution in oceans is a global problem, with growing research efforts focusing on the threat of microplastics (<5 mm fractions). A source of microplastics pollution is derived from personal care products that contain polyethylene micro-spheres which are not captured by wastewater plants. In this work, ten personal care products (mainly scr...

In this work, slow pyrolysis of olive cake has been carried out under nitrogen atmosphere at different temperatures to obtain carbonaceous materials with possible applications as solid fuels and adsorbents of heavy metals from aqueous solutions. The carbonaceous materials have been completely characterized. The Gain and Loss method has been applied...

This research aims to provide a better knowledge of the thermal decomposition of almond shell and this material loaded with heavy metals in a previous stage of biosorption (cadmium, copper, chromium, nickel and lead). Firstly, isolation of constituents of the almond shell was carried out. According to chemical analysis almond shell was constituted...

The present study aims to solve two major challenges of the current society. On the one hand, it investigated the heavy metal removal from mining wastewater. On the other hand, it proposed an alternative use for olive cake. Firstly, a physic-chemical characterization of real wastewater and hydrolyzed olive cake was carried out. Secondly, a study of...

The optimization of the hydrothermal extraction step in the biorefinery scheme in order to obtain sugars and antioxidants from olive cake was carried out. This process using water and low temperatures for the olive cake has not been previously studied by other authors. Central Composite Design of experiments was carried out. Four variables and thre...

Increasing world plastic production generates million tonnes of waste. Flexible packaging bags specially suppose a challenge in mechanical recycling because of their singular properties. This research aims to provide a physical-chemical characterization of commercial polyethylene bags in order to facilitate a future improvement or adaptation of rec...

This research aims to provide a better knowledge of the thermal decomposition of the olive cake as well as this lignocellulosic material loaded, in a previous stage of biosorption, with heavy metals for its use in processes of energy recovery. Firstly, isolation of constituents of the olive cake was carried out. Then, experiments were performed by...

Thermal valorization of heavy metal impregnated biomass has grown up as a researching field during the last few years; however the use of these contaminated wastes as fuel still presents several economic and technical drawbacks. Specially, insertion of nickel metal into the biomass during an impregnation stage with aqueous solutions of nickel salts...

The study of binary biosorption of Pb(II) and Cu(II) was performed by pine nuts shell. Results were compared with the single biosorption of Pb(II) and the single biosorption of the Cu(II). Experiments were performed in batch stirred and in a continuous system. The presence of lead caused a slightly decrease of the copper biosorption yield and can b...

The thermal behavior of the lead-impregnated olive-stone during pyrolysis was investigated via thermogravimetric analysis at different heating rates under an inert atmosphere of nitrogen to study the effect of the metal during the thermal process. Thermogravimetric curves showed a little increase of the degradation temperature of hemicellulose and...

Continuous copper biosorption in fixed-bed column by olive stone and pinion shell was studied. The effect of three operational parameters was analyzed: feed flow rate (2-6 ml/min), inlet copper concentration (40-100 mg/L) and bed-height (4.4-13.4 cm). Artificial Neural-Fuzzy Inference System (ANFIS) was used in order to optimize the percentage of c...

This paper presents a kinetic analysis of thermal decomposition of olive tree pruning from its basic compounds in pyrolysis and combustion reactions. Experiments were performed by TGA under inert and oxidant conditions and results indicated that the decomposition of the olive tree pruning was related to the material composition. Pseudo-mechanistic...

In this work, the effect of experimental conditions of torrefaction on properties of olive tree pruning was investigated. This study has demonstrated that fuel properties of olive tree pruning were improved by torrefaction. For example, torrefaction at 300 °C during 60 min provided to raw biomass an increase on the ratio of fixed carbon to volatile...

This work presents a solution of a problematic waste generated by a local industry. It provides a novelty fractionation methodology for the transformation of a worthless waste into higher value fractions. Besides, this methodology can be applied to other agricultural and forest wastes for an efficient management and use of resources. The waste is c...

The generation of problematic Ni-loaded waste from several applications alongside the high cost of the metal catalysts has caused the research effort to develop low cost Ni-catalysts. Therefore, the aim of this work is the study of the catalytic effect of nickel ions onto the thermal decomposition of the olive tree pruning (OTP) in nitrogen and oxy...

The objective of this study is the proposal of a pyrolysis kinetic model that describes the thermal decomposition of olive tree pruning in different torrefaction conditions via thermogravimetrical measurements in nitrogen atmosphere. First, the determination of activation energies was performed by isoconversional methods of Flynn–Wall–Ozawa, Kissin...

The study concerns the pyrolysis kinetics of exhausted pine cone shell after its use as biosorbent of copper and lead from aqueous solutions in a fixed bed column. First, breakthrough curves of biosorption process were obtained. Main dynamic biosorption parameters were determined and analyzed. Then, non-isothermal thermogravimetric experiments were...

In the present work, biosorption of copper(II) in the presence of lead(II) ions by native pine cone shell (PCS) was investigated in batch and packed bed reactors. Particularly, it provides new information regarding binary biosorption of metals in continuous flow. The behaviour of competitive Cu(II) and Pb(II) biosorption in batch was successfully d...

The olive tree pruning is a specific agroindustrial waste that can be successfully used as adsorbent, to remove Pb(II) from contaminated wastewater. Its final incineration has been studied in a thermobalance and in a laboratory flow reactor. The study aims at evaluating the fate of Pb during combustion, at two different scales of investigation. The...

This work studies the complete use of untreated and chemically treated olive stone: first, it is applied as biosorbent of lead and later, reused as fuel in a pyrolysis process. The waste was chemically treated with three chemical agents to increase its biosorption capacity. Results from characterization show that the treatment of the OS has sound e...

In this work, olive stone (OS) was utilized to investigate its capacity as biosorbent for methylene blue (MB) and Cr(III), which are usually present in textile industry effluents. Equilibrium and kinetic experiments were performed in batch experiments. The biosorption process followed pseudo-second-order kinetics. The equilibrium data were fitted w...

Batch isotherm studies were carried out on a laboratory scale: (i) to investigate the effectiveness to remove lead of two wastes (olive stone (OS) and olive tree pruning (OTP)), untreated and chemically treated; and (ii) to examine the applicability of various adsorption isotherms to fit the experimental data. Results from tests were analyzed using...

Physico-chemical properties of pine cone shell have been determined. Results of characterization study showed that pine cone shell could be used as biosorbent of nickel from aqueous solutions in a fixed-bed column and later as input material in thermochemical processes. To study the behavior of Ni-loaded pine cone shell as fuel, non-isothermal ther...

The overall objective of this study is to model and optimize the elimination of nickel ions from aqueous solutions by pine cone shell and olive tree pruning as biosorbents. A 3(3) full factorial design was employed for experimental design and analysis of the results. The flow rate (4-8mL/min), the mass of biosorbent (5-15g), and the initial Ni(II)...

In this paper, the olive tree pruning (OTP) was treated with three chemical agents (H2SO4, HNO3 and NaOH) and the ability of untreated and treated OTP to remove lead ions from aqueous solution was investigated in a packed bed column. The obtained biosorption capacities (qe) were 39.25, 68.64, 121.39 and 112.01 mg/g for untreated, H2SO4, HNO3 and Na...

In this work, first, the two-phase olive mill solid waste was characterized in terms of its physical–chemical properties, which can be useful for its use in pyrolysis units. Then, its behavior on pyrolysis processes was studied by dynamic thermogravimetry and derivate thermogravimetry. For the simulation of pyrolysis processes a kinetic model inclu...

The biosorption characteristics of Cr6+ from aqueous solution using sugarcane bagasse (SCB) were investigated. Experimental parameters affecting the biosorption process, such as pH, contact time, initial metal concentration, and temperature were studied. The equilibrium nature of Cr6+ biosorption at different temperatures was described by the Freun...

In this research, olive stone was used as precursor for the development of new biosorbents for lead ions. Chemical treatments were analyzed in terms of their effects on physical–chemical properties and kinetics of lead removal. A kinetic study of the biosorption of lead ions by olive stone was analyzed according to six different kinetic models (pse...

In this research, new biosorbents of olive tree biomass were obtained by acid and basic treatment of the raw material at 50 °C and 1 M of chemical agent concentration. A kinetic study of the biosorption of lead ions by olive tree pruning was analyzed according to six different kinetic models. The pseudo first, pseudo second, pseudo n-order, Elovich...

Olive stone is an agroindustrial waste, which has been used as precursor for the development of new biosorbent materials for lead ions removal. Chemical treatments of biosorbent were studied to analyze their effects on physical-chemical properties and lead removal. Chemical treatment of olive stone can remove lignin and holocellulose and increase t...

In this study, the effect of Pb(II) in biosorption of Cu(II) by almond shell from a binary metal mixture was studied and compared with the single metal ion situation in a batch stirred system and in a continuous system. It was observed that copper biosorption yields and copper equilibrium uptakes were slightly reduced by the presence of lead. This...

Biosorption of Cu(II) by pinion shell (PS) was investigated in batch and packed-bed systems. The biosorbent was characterized by elemental analysis, potentiometric titrations, surface area and pore size distribution, and Fourier transform infrared (FTIR) analyses. Potentiometric titrations and FTIR spectroscopy indicated the presence of functional...

Pine cone shell (PCS), a vegetable solid waste has been used as effective and efficient biosorbent for the removal of Cu(II) from aqueous solutions. The biosorbent was characterized by elemental analysis, potentiometric titrations, surface area and pore size distribution and FTIR analyses. Batch adsorption experiments were carried out as a function...

This paper focuses on the study of the biosorption process for removal of copper present in wastewater using pine bark as biosorbent. The results of biosorption tests planned are presented, implementing a factorial design of experiments for obtaining the information necessary to develop a mathematical model (a second order polynomial model) represe...

Biosorption of Pb2+ from aqueous solutions and desorption of Pb2+ from acid-treated olive stone were studied. Equilibrium screening tests of lead desorption established a solution of 0.3 M hydrochloric acid as the most appropriate eluting agent. Fixed-bed biosorption and desorption recovery curves for Pb2+ were obtained for multiple consecutive bio...

The present study was undertaken to evaluate the feasibility of sugarcane bagasse for the removal of nickel from aqueous solution. Batch experiments were performed to study the biosorption of nickel on sugarcane bagasse sorbent considering the effect of contact time, initial concentration of nickel ions, pH of the solution and temperature. The sorp...

In this study, an experimental design technique, the factorial design 3(3), has been used to investigate the biosorption of chromium(VI) from the aqueous solutions by the brown seaweed Sargassum muticum. The three factors considered were temperature, sorbent dosage and initial metal concentration at three markedly different levels. The biosorption...

This paper presents the ability of a low-cost biosorbent, almond shell, to remove Cu(II) ions from aqueous solution. Biosorption capacity of almond shell to removal Cu(II) was studied in a packed bed column. The effect of various parameters, flow rate, initial copper concentration, and mass of biosorbent, was analyzed. A 2 factorial experiment desi...

In this work, the biosorption properties of olive stone for removal of trivalent chromium were investigated in batch and continuous systems. First, batch isotherm studies were carried out on laboratory scale to evaluate the Cr (III) biosorption capacity of olive stone. Equilibrium uptake of Cr (III) ions from aqueous solutions by olive stone was fi...

Olive stone (OS), two-phase olive mill solid (OMS) and also olive tree pruning waste (OTP), three wastes of the olive-oil production, were tested as low-cost adsorbents for Pb (II) removal from aqueous solutions. In order to reduce the total number of experiments to achieve the best conditions of the batch biosorption procedure, two 32 factorial de...

Olive stone (OS) and pine bark (PB) were used as effective biosorbents for the removal of Cu(II) from aqueous solutions. The biosorbents were characterized by elemental analysis, potentiometric titrations, surface area and pore size distribution and FTIR analyses. Batch adsorption experiments were carried out as a function of pH, particle size, bio...

This work examines the potential of almond shell for its use as biosorbent of copper present in aqueous solutions. First, a physical-chemical characterization of the solid was performed. It has been determined that the almond shell pores are mesopores, with an average pore width of 54.5 Å and the total number of active groups is 0.592 mmol/g being...

Modification of sugarcane bagasse with sulphuric acid improves the metal ion binding capacity of the bagasse. The process for this modification must be optimized for being cost effectively and environmentally accepted. In this regard, the objective of this study is to employ life cycle assessment (LCA) to quantify and compare the potential environm...

A new biosorbent for removing lead(II) ions from aqueous solutions has been investigated. This new adsorbent is olive tree pruning waste, an agricultural by-product in the Mediterranean region. Removal of lead(II) was studied at pH 5 in a batch system. The pseudo-first-order, pseudo-second-order and Weber and Morris kinetic models were applied to t...

This paper investigates the ability of olive stone to remove chromium (VI) ions from aqueous solution in a packed bed up-flow column with an internal diameter of 1.5 cm. The experiments were performed with a bed height of 15 g (13.4 cm) and a flow rate of 2 mL/min. To predict the breakthrough curves and to determine the characteristic parameters of...

In this work three olive crop wastes have been used: olive stone, the two-phase olive mill solid and olive tree pruning as biosorbents of Pb (II) in aqueous solution before and after being subjected to various chemical treatments. Potentiometric titration and infrared analysis shown that, for both olive stone and olive tree pruning, treatment with...

This study examined the lead biosorption capacities of two solid wastes from olive-oil production, two-phase olive mill solid (OMS) and olive stone (OS), using batch experiments at different temperatures. The aim was to determine the isotherms of these wastes and thus their applicability as alternative biosorbents for lead removal. In addition, the...

Bagasse from sugarcane, a waste material, has been studied as a biosorbent for removing lead from aqueous solutions in batch systems. In this study, bagasse was modified by sulphuric acid to enhance sorption capacity for lead and the origin of the enhancement was investigated by observing the change in surface functional group concentrations and th...