Lucas Meili

Universidade Federal de Alagoas · Center of Technology (CTEC)

In this work, LDH-biochar composites were synthesized in different molar ratios of Mg:Al (2:1, 3:1 and 4:1) using co-precipitation method. The composites were applied to remove an organic dye from aqueous solutions by adsorption. The composites and the pure bovine bone biochars were characterized by Fourier transform infrared spectroscopy (FT-IR),...

The wastes from the steel industries are disposed in landfills or used in construction and improvement of the soil. Since these wastes are reported as adsorbents for water pollutants, two steel dust/slag wastes, Alrhaji (AL) and Arab (AR) materials, were applied for Eriochrome Black T dye (EBT) removal from aqueous system. The materials were charac...

Seven different routes to produce MgFe Layer Double Hydroxides (LDH) were tested. This study aims to explore different methods of MgFe-LDH synthesis and to analyze the physicochemical properties of the obtained materials (phase purity, crystallinity, and textural features). For this, synthesized materials via co-precipitation, hydrothermal, ultraso...

Accidents involving oil transportation has increase due to directly connection with the elevation of global energy demand. The environmental losses are tremendous and brings huge economic issues to remediate the spilled oil. This report presents an up-to-date review on an overall aspects of oil spill remediation techniques, the fundamentals and adv...

Adsorption is an effective technology for wastewater treatment processes. Activated carbons are the adsorbent materials traditionally used in most of the applications but sometimes their use is limited due to the high-cost of synthesis/production and for their partial or difficult regenerability. For these reasons, scientists have turned their inte...

Recently, biochar has been recommended as a supporting material for nanometric particles to prevent agglomeration and improve surface area. Among the conceivable uses, clay dispersion over biochar appears to be an intriguing and creative choice that allows for the simultaneous and synergistic exploitation of the adsorption capabilities of both mate...

The potential of pyrolyzed Mytella falcata shells as an adsorbent for removing thiazine dye from aqueous solutions was investigated. The study found that the adsorbent produced at 600°C of pyrolysis temperature, with an adsorbent mass of 0.5 g, particle diameter 0.297 − 0.149 mm, and pH 12.0, demonstrated the highest dye removal efficiency of 82.41...

This study explores the potential of the corozo fruit (Bactris guineensis) palm tree in the Colombian Caribbean as a source for porous carbon material. Its specific surface area, pore volume, and average pore size were obtained using N2 adsorption/desorption isotherms. The images of the precursor and adsorbent surface were obtained using scanning e...

The objective of this study is to develop a low-cost biosorbent using residual seeds of the Citrullus lanatus fruit for the removal of cationic dyes. Physicochemical parameters such as pH, adsorbent mass, contact time, and temperature were evaluated for their effects on dye removal. The biosorbent is composed of lignin and cellulose, exhibiting a h...

Hexavalent chromium (Cr(VI)) is a highly toxic form of chromium, which can be found in industrial effluents from various sectors, such as the metallurgical, tanning, and pigment industries. The presence of Cr(VI) in the environment is a concern due to its negative effects on human health and the ecosystem since it is carcinogenic, mutagenic, and ca...

Pharmaceuticals in the concentration range of hundreds of ng/L to μg/L occur in wastewater and end up in surface water, groundwater and agricultural land where they cause various health risks. These pollutants are classified as emerging and cannot be efficiently removed by conventional wastewater treatment processes. The use of nano-enabled photoca...

This study analyzed the viability of using malacoculture residue (Mytella falcata) to produce layered double hydroxides (LDHs) and for its subsequent use as an adsorbent. The CaAl/LDH-RE material was produced with calcium oxide from the residue and the CaAl/LDH-AP was produced with a commercial reagent. Both were used to remove methyl orange (MO) a...

This study focused on the function- alization of cellulose nanocrystals (CNC) with Mg/ Fe-LDH composites to assess the performance and mechanism for tetracycline (TRC) removal from aqueous solutions. SEM images and the XRD pat- terns confirmed the cellulose nanocrystals have adhered over the surface of MgFe-LDH. The pres- ence of CNCs over the LDH...

Bisphenol A (BPA) is a diphenylmethane derivative often used as a building block of polycarbonate in the production of plastic and plastic additives. Different sectors of the chemical industry release daily high concentrations of BPA in treatment plants, leading to polluting the environment. Due to chemical characteristics, BPA is considered highly...

The Calophyllum inophyllum species annually produces a large volume of cylindrical fruits, which accumulate on the soil because they do not have nutritional value. This study sought to enable the use of this biomass by producing activated biochar with zinc chloride as an activating agent for further application as an adsorbent in batch and fixed be...

Biochar (BC) properties and their influences on agricultural soil health and environmental ecosystems largely depend on feedstock, residence time, and pyrolysis conditions. The organic and inorganic contaminants from soil can be removed using BC as an adsorbent. Additionally, soil amendment with BC is known to improve overall soil quality, microbia...

Biodiesel is an alternative to fossil-derived diesel with similar properties and several environmental benefits. Biodiesel production using conventional catalysts such as homogeneous, heterogeneous, or enzymatic catalysts faces a problem regarding catalysts deactivation after repeated reaction cycles. Heterogeneous nanocatalysts and nanobiocatalyst...

Despite formaldehyde's high toxicity, it has widespread demand worldwide due to its applications in the synthesis of a plethora of important chemicals like urea-formaldehyde, paraformaldehyde, polyacetal, and biological reagents amongst others. Currently, silver and iron molybdenum oxide catalysts are mostly utilized industrially due to their excel...

Layered double hydroxides (LDHs) form a suitable structure for nitrate removal in aqueous solution. Its synthesis can be obtained by different methods, under different conditions, such as hydrothermal treatment and coprecipitation, a more conventional method. However, the investigation of the possible environmental impacts of each synthetic route h...

In this study, the residual pods of the forest species Erythrina speciosa were carbonized with ZnCl 2 to obtain porous activated carbon and investigated for the adsorptive removal of the drug paracetamol (PCM) from water. The PCM adsorption onto activated carbon is favored at acidic solution pH. The isothermal studies confirmed that increasing the...

The use of layered double hydroxides (LDHs) as adsorbent for water treatment has been gaining relevance in recent years. In this context, this work aimed to map, through a bibliometric study, the extent of research that deals with the theme. The scientific database used was the Web of Science, and the chronology of the search consideredthe period f...

The present study evaluated for the first time the adsorption potential of cellulose nanocrystal-structured MgAl/LDH (CNC/MgAl-LDH) composite for the removal of tetracycline (TC) from the aqueous phase. The prepared adsorbent was characterized by several physicochemical techniques including SEM, XRD, FTIR, and BET surface area analysis. The CN-MAl-...

This study aimed to produce an eco-friendly bio-based polyurethane foam with mesquite gum (MG) and Sargassum sp. biomass (SA) to remove hexavalent chromium from an aqueous solution by adsorption. The synthesized PU foam presented a smooth and regular surface compared to the commercial polyurethane foam (CPF), the mesquite gum and sargassum presente...

For each ton of steel produced, approximately 120 kg of steel slag are generated in the BOF (Basic Oxygen Furnace) process. In general, the recently produced steel aggregates have a volumetric expansion that leads the material to fragmentation and subsequent fines production. Such a result of this expansion, the use of slag in paving must be done i...

O Hidróxidos Duplo Lamelar (HDL) é um material sintético nanoestruturado em duas dimensões que apresenta camadas carregadas positivamente com ânions intercalados para balanceamento de carga e estrutural. Sendo reconhecido como material promissor para diversas aplicações, é essencial uma exploração completa das suas possíveis propriedades atrativas...

Os Hidróxidos Duplos Lamelares (HDL) representam uma classe de materiais inorgânicos com composição química e estruturas variáveis. Dispõem de uma grande versatilidade estrutural, química, eletrônica, iônica, óptica e magnética, apresentando uma ampla variedade de aplicações. Vários artigos de revisão dedicados a esse material vêm sendo publicados,...

The use of layered double hydroxides (LDHs) as adsorbent for water treatment has been gaining relevance in recent years. In this context, this work aimed to map, through a bibliometric study, the extent of research that deals with the theme. The scientific database used was the Web of Science, and the chronology of the search consideredthe period f...

This work was aimed at applying machine learning techniques to predict Semi-Solid Fermentation (SSF) yield using Cunninghamella echinulata fungus for alginate lyase production using Sargassum macroalgae genus as substrate. Approximately 115 experimental data were obtained as a result of the variation of the following factors: tc (cultivation time)...

In this study, the residual pods of the forest species Erythrina speciosa were carbonized with ZnCl 2 to obtain porous activated carbon and investigated for the adsorptive removal of the drug paracetamol (PCM) from water. The PCM adsorption onto activated carbon is favored at acidic solution pH. The isothermal studies confirmed that increasing the...

The study analyzed the potential of leaf powder prepared from the residual leaves of the species Sansevieria trifasciata, as a potential adsorbent for methylene blue (MB) removal. The equilibrium was reached fast for almost all concentrations after 60 min, obtaining the maximum capacity of 139.98 mg g −1 for 200 mg L −1. The increase in temperature...

Novel Materials for Environmental Remediation Applications: Adsorption and Beyond presents detailed, comprehensive coverage of novel and advanced materials that can be applied to address the growing global concern of the pollution of natural resources in water, the air, and in soil. The book provides up-to-date knowledge of state-of-the-art materia...

Activated carbon (AC) is a porous carbon-rich material that is widely used to remove 22 pollutants, such as synthetic dyes, from contaminated water. Although quite efficient, the use 23 of this technology is limited to the ability of the AC to be regenerated and/or reused. 24 Conventional regeneration procedures are inefficient, requiring the devel...

A porous activated carbon from Hovenia dulcis was prepared using zinc chloride (ZnCl 2) as an activating agent and applied to remove diuron in aqueous solutions. The carbon presented a smooth and regular surface, with an area of 898 m² g-1 , narrow pores of average diameter equal to 1.242 nm, and volume of 0.296 cm 3 g-1. Adsorption was favored by...

Within the frame of this article, briefly but comprehensively, we present the existing knowledge, perspectives, and challenges for the utilization of Layered Double Hydroxides (LDHs) as adsorbents against a plethora of pollutants in aquatic matrixes. The use of LDHs as adsorbents was established by considering their significant physicochemical feat...

The disposal of coconut wastes is costly and damaging to the environment, but its uses are advantageous activated carbons production. Coconut leaves waste were used for activated carbon production by pyrolysis at 500° C and activation with potassium carbonate. The activated carbon was used for caffeine removal from aqueous solution. The coconut lea...

This work aimed to study the synthesis of Mg/Al layered double hydroxides (LDH) from aluminum residues. LDH was produced by co-precipitation and hydrothermal methods using Al(OH)3 synthesized from aluminum residue. It was possible to confirm the formation of LDH, with an increase in crystallinity for the hydrothermal synthesis. The FTIR indicates n...

Brazil has excellent biodiversity, one of the largest in the world. The state of Rio Grande do Sul presents two different biomes, the Pampas and the Atlantic forest, which contribute to the intense agricultural activity in this region. One of the main problems in these activities is the high waste generation. Due to the availability of a variety of...

The decimation of fossil fuel and rises in environmental issues are induced by the increasing global consumption of fossil fuel. This phenomenon is forecasted to increase gradually and has caught serious attention from researchers and governments around the world to discover and develop a cleaner and greener fuel-like biofuel. Green diesel has been...

In this study, a new low-cost magnetic composite comprising biochar-steel dust wastes was fabricated by the facile co-pyrolysis method at different proportions of steel dust wastes. The performance of the magnetic composite was investigated for the adsorption of phosphate from water. The physicochemical characteristics of the magnetic composite ind...

Due to their almost unique ion exchange characteristics, reconstruction of calcined precursors, memory effect, and surface area, layered double hydroxides (LDHs) present a wide variety of applications. Physical-chemical, structural and morphological characteristics give to LDHs properties useful in the solution of environmental problems. LDHs can b...

Advanced Materials for Sustainable Environmental Remediation: Terrestrial and Aquatic Environments presents detailed, comprehensive coverage of novel and advanced materials that can be applied to address the growing global concern of the pollution of natural resources in waters, the air and soil. It provides fundamental knowledge on available mater...

This book aims to provide an overview of how photocatalysis can be employed in water and wastewater treatment. Each chapter will attend to a different area of interest, starting with an introduction on the fundamentals of photocatalysis. The covered topics include metal organic frameworks (MOFs), photocatalytic reactor types and configurations, lan...

The species Sansevieria trifasciata is very widespread around the world both for its ornamental use and profusely spread among religions of African origin. The study analyzed the potential of leaf powder prepared from the residual leaves of the species Sansevieria trifasciata , as a potential adsorbent for methylene blue (MB) removal in a discontin...

The coconut industry has great economic importance for the Asia-Pacific region and Brazil. For this reason, researchers have given special attention to coconut shells and fibers as fuel sources. However, other residues as coconut inflorescence wastes (CIW) have been neglected. In this work, CIW were pyrolyzed. Effects of pyrolysis temperature (290-...

In this study, the low-cost steel dust from two steelmaking industry was investigated for the elimination of anionic dye (Eriochrome black T (EBT)) from water. The characterization results indicated that the steel dust particles are mesoporous material with heterogenous structure and exhibit different surface functionalities including metal oxides...

A huge environmental problem in the world is related to the volume of waste produced by bivalve mollusks culture, which generates great impact and high costs for proper treatment and disposal. Faced with this problem, for the first time, the feasibility of introducing bivalve mollusks culture shells to produce layered double hydroxides (LDH) was st...

The efficiency of saturated Activated Carbon (AC) electrochemical regeneration was evaluated. Reactor configurations in cathodic/anodic process, applied current effect on the properties of AC and Methylene Blue MB-AC interactions and adsorption/desorption mechanisms were studied. The efficiency was measured by adsorption capacity adsorption/regener...

This study focuses on the use of chemically modified steel dust-based adsorbent to remove Eriochrome Black-T (EBT) and Tetracycline (TC) from water. The adsorption isotherm, kinetic modeling, thermodynamic and regeneration studies were conducted. The adsorption process was modeled using Artificial Neural Network. The adsorption kinetics were well f...

Demand for energy has increased globally due to population growth and socioeconomic development stemming from rapid industrialization and urbanization. This scenario worsens the dependence on energy resources and highlights the question regarding their availability, showing the fragility of non-renewable fossil fuels. In order to supply the growing...

The production of biochar from sewage sludge pyrolysis is a promising approach to transform the waste resultant from wastewater treatment plants (WWTPs) to a potential adsorbent. The current review provides an up-to-date review regarding important aspects of sewage sludge pyrolysis, highlighting the process that results major solid fraction (biocha...

This study aims to develop a nano-sized fluoridated layered double hydroxide (LDH)-based release system via hydrothermal treatment for the controlled delivery of fluoride (F-) ions in the oral environment. The synthesis of conventional LDH-type (C-LDH) precursor nanomaterials was conducted using a co-precipitation method at constant pH, and the nan...

The adsorptive performance of the natural Saudi Arabian volcanic ash (VA) and its NaOH-modified form (VA-NaOH) for Malachite green (MG) uptake from water were evaluated using response surface methodology (RSM) modeling technique and mechanistic aspects studies. The characterization analyses showed that both materials possess abundant functional gro...

The disposal of coconut wastes is costly and damaging to the environment, but its uses are advantageous activated carbons production. Coconut leaves waste were used for activated carbon production by pyrolysis at 500º C and activation with potassium carbonate. The activated carbon was used for caffeine removal from aqueous solution. The coconut lea...

The human coronavirus disease-2019 (COVID-19) caused by SARS-CoV-2 is now a global pandemic. Personal hygiene such as hand-washing, the use of personal protective equipment, and social distancing via local and national lockdowns are used to reduce the risk of transmission of SARS-CoV-2. COVID-19 and the associated lockdowns may have significant imp...

This book compiles 15 chapters about the synthesis, characterizations, and application of many kinds of magnetic adsorbents for water treatment. It is devoted to the scientific community that works with adsorption technologies for water treatment and remediation. Specifically, for professors and Ph.D. students. It is expected that this book serves...

This chapter covers the fundamental concepts of adsorption in liquid phase. Aspects of the adsorption mechanism and operation characteristics are discussed. Kinetic and equilibrium aspects, both theoretical and experimental, are presented and reviewed. Thermodynamic adsorption properties are also commented and considered in this chapter.

Lanthanum hydroxide engineered sewage sludge biochar for efficient phosphate elimination: Mechanism interpretation using physical modelling ; Science of the Total Environment 803 (2022) 149888

This study aimed at synthesizing γ-alumina from aluminum residue obtained from a frame fabrication factory, through precipitation followed by calcination, and apply it as an adsorbent to remove dyes from aqueous solution. The produced adsorbent was designated as non-rigid of aggregates of irregularly shaped particles, with a plate format, a mesopor...

This study aimed to evaluate the synthesis of MgAl/ LDH from the drying process perspective, evaluating the influence of temperature (75−90°C) and time (16−20 h) in the drying process. The synthesis was performed, maintaining a ratio of 2:1 of Mg/Al, and the drying was conducted according to a 2 2 experimental design: four axial points and three re...