Tamer Akar

Eskisehir Osmangazi University | ESOGU · Department of Chemistry

Immobilized biomaterials have recently attracted researchers' attention in the field of environmental biotechnology due to their effective biosorption performances. In this respect, a novel hybrid biocomposite based on Thamnidium elegans cells, olive pomace, and chitosan ([email protected]) was produced and tested for the first time to remove a tar...

In this study, alunite was immobilized with chitosan to investigate the effective parameters for its adsorption and preconcentration potential for Cu2+ ions. After immobilization, the proposed composite’s adsorption efficiency increased by about 93% and 9%, respectively, when compared to alunite and chitosan components. The pseudo-second-order mode...

In the comprehensive research, the uptake of Cu(II) ions from contaminated water was explored using metakaolin-based geopolymer (MKG). The effects of contact time, adsorbent amount, initial pH, temperature, stirring speed, flow rate, column diameter, and adsorbate volume on the Cu(II) removal yield of MKG in the batch and column treatment systems w...

Alunite (KAl3(SO4)2(OH)6) was evaluated for Pb²⁺ removal after magnetically functionalization (MagA) which led to a considerable improvement in the natural mineral's characteristics and adsorption capability. Pb²⁺ adsorption was investigated in both batch and column systems concerning the influence of pH, MagA amounts, contact time, initial Pb²⁺ co...

Due to their environmental friendliness, strong remediation capabilities, and low cost, biochar sorbents have garnered considerable attention recently. In the current study, the effectiveness of fish scale biochar (FSBC) as an alternative material in eliminating toxic cadmium (Cd²⁺) ions from contaminated water was examined using batch and fixed-be...

A fungal biomass, Lactarius salmonicolor (L. salmonicolor), was entrapped in a silica gel matrix to evaluate the removal of Co2+ and Mn2+ ions from an aqueous medium and a real effluent. The batch experiments were carried out to investigate the influences of biosorbent dosage, initial pH, contact time, and temperature. The results showed that no pH...

Water pollution caused by antibiotics is a serious environmental problem in recent years. Using biochar to remove such pharmaceutical pollutants has recently emerged as a promising option. After H3PO4 modification, a new waste-based biochar (MPCWSB500) from sour cherry stalk was successfully synthesized to remove ciprofloxacin (CFX) from aquatic me...

One of the most important environmental and health issues today is the elimination of the dye pollution from the contaminated water ecosystem. The use of geopolymers to eliminate such contaminants has recently emerged as a promising alternative. In this study, metakaolin based geopolymer (MKBG) was synthesized to be a promising adsorbent for Basic...

The removal of toxic metals from the aquatic ecosystem is one of the most pressing environmental and public health concerns today. A strong potential has recently emerged for the removal of such metals using biochar sorbents. Biosorption technology could make a significant difference in the future. It is a viable and cost-effective alternative to t...

BACKGROUND The fluoroquinolone antibiotics in the water sources are a significant threat to public health, water ecosystem, and water reuse. In this study, the feasibility of the biosorption of ciprofloxacin (CIP) using pine needles biomass‐Gibberella fujikuroi immobilized biocomposite (PNGFB) was promoted. It was prepared by passive cell immobiliz...

An effective and sustainable biosorbent (MagOPIC) was prepared from chitosan and olive pomace by the combined action of immobilization and magnetic modification to remediate Pb²⁺-contaminated waters. Pb²⁺ sorption yield at the end of the equilibrium (45 min) period was estimated to be 98.56 ± 0.28% at pH 5.5. Agitation speed, ionic strength, and te...

Dye pollution in the aquatic environment is one of the main environmental and public health issue nowadays. Biosorptive removal of such dyes by biocomposite materials have recently emerged a good potential. For this purpose a novel microbial cell-immobilized Platanus orientalis leaf tissue (NSPOL) was prepared through a passive immobilization, in t...

Synthetic dyes have complex molecular structures and are stable molecules against oxidizing agents, sunlight, and microbial attack. Therefore, the treatment of dye‒containing wastewater using appropriate techniques is of great importance. Difficulties in separation and recovery of an adsorbent from the solution limit the large‒scale applications of...

This study was focused on the design of a new and effective decolorization agent by immobilization of Mucor plumbeus cells on the sepiolite matrix (MPSP). The passive immobilization method was used to attach the microbial cells to sepiolite. Methyl violet (MV) decolorization performance of this immobilized material was examined through batch and dy...

A novel biomaterial was prepared by the immobilization of Phlebia gigantea cells in the medium containing lignocellulosic waste and used for the first time in the bioremediation purpose. The developed new biocomposite possesses higher Pb(II) retention potential when compared with the free microbial cells. It could remove Pb(II) up to 74.11% at a bi...

A new magnetic bio-based composite was designed by the magnetic modification of passively immobilized fungal cells. It was utilized for biosorptive decolorization of reactive dye-contaminated aquatic media. As a greener option, waste tea leaf tissues were used for the first time as an immobilization matrix for microbial cells. Immobilized magnetic...

Aquatic pollution caused by synthetic dyes poses a significant threat to environment and public health. Efficient and convenient removal of dye contaminants from aquatic environment is a challenge for environmental protection. Biosorption process is a promising way to remove such chemicals from contaminated media. Herein, a new biomagsorbent based...

Synthetic dyes are water soluble or dispersible aromatic compounds, having potential application in many industries. Discharge of dye contaminated industrial effluents into natural water sources can pose hazardous effects on the living systems. Hence, the treatment of colored effluents using efficient technologies is of major environmental concern....

A novel biomass/polymer composite was fabricated by embedding Thamnidium elegans cells in acrylic network of p(3-Methoxyprophyl)acrylamide p(MPA) enriched with 2-Akrylamido-2-methyl-1-propane sulfonic acid (AMPS). Cd(II) retention potential of hydrogel (p(MPA-co-AMPS)) increased by 20.66% times after this enrichment. The gel matrix could be effecti...

Biosorption is an effective alternative method for the control of water pollution caused by different pollutants such as synthetic dyes and metals. A new and efficient biomass system was developed from the passively immobilized fungal cells. The spongy tissue of Phragmites australis was considered as the carrier for the immobilization of Neurospora...

Biosorptive treatment of contaminated solutions with different biomaterials has been extensively studied in recent years. However, application of the suggested biosorbents in industrial scale has been very limited so far. Real wastewater conditions play an important role in the commercial success of the biosorption process. This study describes the...

This study was undertaken to prepare a novel and environmentally-friendly composite for the use in the wastewater treatment process. This composite was produced by immobilizing alunite with a glucosamine biopolymer, chitosan. Batch and dynamic flow mode decolorization potential of the chitosan − alunite composite (CAC) was systematically evaluated...

Tetra-n-butylammonium bromide modified sugar beet pulp (TBAB-SBP) with good biosorption and regeneration potential was prepared for removal of dye from contaminated solutions. The decolorization performance of TBAB-SBP was investigated using Reactive Yellow 2 (RY2) as a model dye. The characterization of the modified biosorbent was investigated by...

Borago officinalis has successfully been evaluated as a biosorbent for the removal of cadmium and manganese from aqueous solutions in batch and column systems. Maximum biosorption for Cd and Mn ions was obtained at original pH values of the solutions. The temperature-independent and fast biosorption of Cd and Mn onto B. officinalis could be observe...

Contamination of water sources by synthetic dyes is a problem of global concern given their potential toxicities and environmental impacts. A significant increase has been noted in the studies related to developing alternative and efficient systems for the treatment of coloured effluents. This study focused on the development of an environmentally...

The surface of the scarlet firethorn biomass was modified with dimethylglyoxime. Modified biosorbent (DMGPC) was evaluated for its potential to remove methylene blue (MB) dye from contaminated solutions. Batch- and continuous-mode biosorption conditions were examined by varying initial pH (2.0–10.0), biomass dosage (0.4–4.0 g L−1), time (5–60 min),...

The biosorption ability of sugar-beet pulp was improved by modifying with quaternary ammonium-salt for examination of its potential application in decolorization process from wastewater. Decolorization conditions were investigated as functions of different experimental parameters such as initial pH, biosorbent amount, time and dye concentration. At...

A natural biosorbent obtained from Pyracantha coccinea was modified with an anionic surfactant to facilitate its dye removal ability. Modified biosorbent was successfully employed for the decolorization of Methyl Violet (MV)-contaminated solutions. A three-variable Box-Behnken design for response surface methodology was used to examine the function...

The in vitro antibacterial and antifungal activities of demethoxyviridin and some synthetic analogues were evaluated by the agar diffusion method. The minimum inhibitory concentrations (MIC) of the active compounds were also determined by the agar dilution method. Demethoxyviridin (1) showed moderate antibacterial activity against most of the strai...

In this study, biomass obtained from Thuja orientalis (T. orientalis) cones was converted to magnetic derivative (Mag-TOCP) and effectively used as a sorbent material for the removal of Pb2+ ions from contaminated solutions. IR, SEM, EDX and zeta potential analysis were employed to analyze the biomaterial modification and sorption mechanism. Batch...

In this study, the potential of biomaterial obtained from filamentous fungi, Thamnidium elegans was investigated for the batch and dynamic flow mode biosorption of Reactive Red 198 (RR198). The effects of pH, biosorbent amount, contact time, initial dye concentration and ionic strength were evaluated in addition to the investigation of its biosorpt...

The biosorption of MV onto untried biomass prepared from Thamnidium elegans culture was investigated in batch and continuous systems. The effects of experimental parameters on the biosorption process (initial pH, biosorbent amount, time, flow rate, initial dye concentration and competing ions) were examined. Biosorption process was the best describ...

BACKGROUND: An immobilized new biosorbent was prepared from macro fungi Lactarius salmonicolor for the effective removal of nickel ions from aqueous media. Operating conditions were optimized as functions of initial pH, agitation time, sorbent amount and dynamic flow rate. Immobilization and biosorption mechanism were examined and the developed bio...

Mucor plumbeus–alunite composite was tested as a new sorbent material for the removal of Pb2+ ions from contaminated solutions. Sorption experiments were carried out by varying pH, contact time, sorbent dosage, initial metal ion concentration and flow rate. Zeta potential measurements, FTIR, SEM and EDX analyses were used to characterize the biosor...

In this study, the ability of Symphoricarpus albus, a natural biosorbent, to biosorb a reactive dye (RR45) after the modification with sodium diethyldithiocarbamate was examined. Batch experiments were carried out as function of initial pH, biosorbent dosage, contact time and temperature in order to model and optimize the biosorption process. Maxim...

This study focused on the improvement of the decolorization potential of biomass derived from Pyracantha coccinea. Alkyl benyzldimethyl ammonium chloride (ABDAC) was used as modification agent. Batch mode decolorization potential of modified biosorbent was explored at different operating conditions. ABDAC modification significantly increased the bi...

The potential use of a waste biosorbent material obtained from Cucumis melo (C. melo) for the removal of Pb2+ ions from aqueous solutions was investigated by considering equilibrium and kinetic aspects. The biosorption showed a pH dependent profile. An increase in biosorbent dosage up to 1.8 g L−1 caused an increase in the biosorption yield of the...

BACKGROUND: A filamentous fungus Neurospora sitophila was immobilized in Zea mays silk tissue and the prepared system was employed as a new biosorbent for the treatment of reactive dye contaminated solutions. RESULTS: Decolorization potential of the biosorbent system was investigated in batch and continuous mode operations. Design parameters such a...

Biosorption potential of biomass obtained from Capsicum annuum seeds to remove a reactive textile dye from contaminated solutions was investigated. Reactive Blue 49 was chosen as model dye. Initial pH, biomass dosage, contact time, initial dye concentration and temperature were evaluated in batch mode studies. Up to 96.62% decolorization performanc...

Biosorption characteristics of a surfactant modified macro fungus were investigated for decolorization of Reactive Red 2 contaminated solutions. Better biosorption efficiency was obtained with a small amount of fungal biomass after modification process. Operating variables like pH, biomass amount, contact time, temperature, dye concentration, flow...

The present research provides information on the dye biosorption potential of chemically modified non-conventional biomass obtained from Pyracantha coccinea. A cationic surfactant hegzadecylethyldimethylammonium bromide (HDEDMABr) was used as modification agent. Dye biosorption characteristics of modified biomass were explored by batch mode equilib...

In the present study a low-cost waste biomass derived from canned food plant, was tested for its ability to remove reactive textile dye from aqueous solutions. The batch biosorption experiments were carried out at various pH, biosorbent dosage, contact time and temperature. Optimum decolorization was observed at pH 2.0 and 1.6gdm−3 of biomass dosag...

Biosorption of lead(II) ions onto Phaseolus vulgaris L. waste was investigated with the variation in the parameters of pH, contact time, biosorbent and lead(II) concentrations and temperatures. The nature of the possible biosorbent and metal ion interactions was examined by the FTIR technique. The lead(II) biosorption equilibrium was attained withi...

This research deals with the evaluation of highly available and cost effective waste biomass of olive pomace for the removal of reactive textile dye, RR198 from aqueous medium and a real effluent. The experiments were conducted to assess the effects of process variables such as initial pH, biosorbent dosage, contact time, temperature and ionic stre...

This study focuses on the possible use of macro-fungus Agaricus bisporus to remove Acid Red 44 dye from aqueous solutions. Batch equilibrium studies were carried out as a function of pH, biomass amount, contact time and temperature to determine the decolorization efficiency of biosorbent. The highest dye removal yield was achieved at pH 2.0. Equili...

A combination of white rot fungi Trametes versicolor and montmorillonite type clay was studied for its ability to remove copper(II) ions from copper contaminated solutions. The effects of process parameters i.e. pH, sorbent dosage, contact time and temperature on the biosorption were examined. Reasonably rapid metal sequester rate was obtained. Max...

The decolorization potential of textile dye Reactive Red 198 (RR198) by Aspergillus parasiticus fungal biosorbent has been investigated as a function of initial pH, contact time, biosorbent and initial dye concentration in a batch system. Maximum dye biosorption capacity 1.03x10-4 mol g-1 was observed at pH 2.0 and 2.0 g L-1 of biosorbent concentra...

A biosorbent was developed by mixing the macro-fungus Agaricus bisporus and Thuja orientalis cones and successfully used for the biosorption of Reactive Blue 49 (RB49) dye. The biosorbent system was evaluated in batch and continuous biosorption process. A series of batch studies was carried out to identify the optimum biosorption conditions such as...

Batch and dynamic flow biosorption studies were carried out using the waste biomass entrapped in silica-gel matrix for the removal of nickel(II) ions from synthetic solutions and real wastewater. Batch biosorption conditions were examined with respect to initial pH, S/L ratio, contact time, and initial nickel ion concentration. Zeta potential measu...

This work reports on the assessment of the dye methylene blue biosorption properties of Pyracantha coccinea berries under different experimental conditions. Equilibrium and kinetic studies were carried out to determine the biosorption capacity and rate constants. The highest biosorption yield was observed at about pH 6.0, while the biosorption capa...

This work reports the batch and dynamic flow biosorption conditions for Reactive Red 45 dye using Agaricus bisporus/Thuja orientalis biomass mixture (ABTOC). Experiments were performed to determine optimum pH, biomass amount, contact time, temperature, dye concentration, and flow rate. The applicability of different kinetic and isotherm models for...

This work reports the results of the study for lead(II) binding by the natural and low cost biosorbent Symphoricarpus albus. Batch biosorption experiments demonstrated the high rate of lead(II) biosorption and the kinetic data were successfully described by a pseudo-second-order model. Biosorption of lead(II) onto S. albus biomass showed a pH-depen...

Biosorption of Acid Blue 40 (AB40) onto cone biomass of Thuja orientalis was studied with variation in the parameters of pH, contact time, biosorbent and dye concentration and temperature to estimate the equilibrium, thermodynamic and kinetic parameters. The AB40 biosorption was fast and the equilibrium was attained within 50 min. Equilibrium data...

The Pb(II) biosorption properties of industrial strain of Saccharomyces cerevisiae immobilized on cone biomass of Pinus nigra were investigated in a batch biosorption system. The effect of initial pH, contact time and biosorbent dosage on the biosorption process was systematically investigated. The biosorption equilibrium was attained within 30 min...

In the present study, biosorption of Acid Red 57 (AR57) onto a waste biomass of Phaseolus vulgaris L. was investigated by varying pH, contact time, biosorbent concentration and temperature, to determine the equilibrium, thermodynamic and kinetic parameters. The AR57 biosorption was fast, and equilibrium was attained within 20 min. Biosorption equil...

The lead (II) biosorption potential of Aspergillus parasiticus fungal biomass has been investigated in a batch system. The initial pH, biosorbent dosage, contact time, initial metal ion concentrations and temperature were studied to optimize the biosorption conditions. The maximum lead (II) biosorption capacity of the fungal biosorbent was found as...

The purpose of this work was to evaluate the adsorption potential of Capsicum annuum seeds, in a batch system for the removal of lead(II) ions from aqueous solutions. The experimental results showed that this agricultural by‐product was effective in removing lead(II) ions. The FT‐IR analysis indicated that the mechanism involved in adsorption of le...

The Pb(II) and Cu(II) biosorption characteristics of Aspergillus flavus fungal biomass were examined as a function of initial pH, contact time and initial metal ion concentration. Heat inactivated (killed) biomass was used in the determination of optimum conditions before investigating the performance of pretreated biosorbent. The maximum biosorpti...

Equilibrium, kinetics and thermodynamic studies on the removal of Acid Red 57 (AR57) by biosorption onto dried Cephalosporium aphidicola (C. aphidicola) cells have been investigated in a batch system with respect to pH, contact time and temperature. The results showed that the equilibrium time was attained within 40 min and the maximum biosorption...

The bacterial strain Bacillus sp. ATS-2 isolated from Pb(II) polluted soil was immobilized with a silica matrix and Pb(II) biosorption properties of immobilized biosorbent were examined. Optimum biosorption conditions were investigated in the fixed bed column with the variation in the parameters of pH, bed length, flow rate and influent concentrati...

Congress Abstract Sesquiterpenes are natural products mainly obtained from essential oils with a vast spectrum of bioactivities [1]. In recent years the use of sesquiterpenes as starting material in the microbial biotransformation of new compounds has been of great interest to chemical, cosmetic and pharmaceutical industries [1–3]. Within this scop...

Biosorption of Acid Red 57 (AR57) on to Neurospora crassa was studied with variation of pH, contact time, biosorbent and dye concentrations and temperature to determine equilibrium and kinetic models. The AR57 biosorption was fast and equilibrium was attained within 40 min. Langmuir, Freundlich and Dubinin–Radushkevich (D–R) isotherm models were ap...

The cement dust is one of the causes of pollution in the environment. In the present study, the cadmium concentrations of soil and plant specimens taken from a rural area exposed to cement factory emissions were determined and also the blood concentrations and sensitivity conditions in humans residing in this rural area were investigated. The 108 s...

The study was aimed of determining the Zn(II) sorption performance of Botrytis cinerea (B. cinerea) biomass as a new biosorbent. Heat inactivated biomass was used in the determination of optimum conditions. The rate and extent of accumulation were effected by pH, contact time and initial zinc ion concentrations. The uptake capacity of B. cinerea wa...

This paper reports the utilization of a macro-fungus Ganoderma carnosum as a biosorbent material for the removal of lead(II) ions from aqueous solutions. The biosorption potential of G. carnosum was investigated by batch experiments. The influences of physico-chemical parameters like pH, biosorbent dosage, contact time and initial metal ion concent...

Biosorption of lead(II) onto Cephalosporium aphidicola was examined and the effects of pH, contact time, biosorbent and lead(II) concentrations and temperature on biosorption were investigated. The nature of the possible cell and metal ion interactions was examined by the FTIR technique. The lead(II) biosorption was fast and equilibrium was attaine...

Biosorption of Pb(II) and Cu(II) ions from aqueous solutions has been studied in a batch system by using a bacterial strain isolated from metal polluted soil. The bacterial strain was identified as Bacillus sp. The optimum conditions of biosorption were determined by investigating the initial pH, contact time and the initial concentrations of metal...

The sorption of Pb(II) and Cu(II) ions from aqueous solutions by raw and pretreated Neurospora crassa fungal biomass was investigated in the batch mode. The influence of solution pH, equilibrium time and initial metal ion concentration using dried N. crassa cells as well as pretreatment on the sorption capacity of the biomass at optimum conditions...

Pb(II) ions were found to be accumulated extracellularly on the surface of Botrytis cinerea. The rate and extent of accumulation were affected by pH, contact time and initial Pb(II) ion concentrations. The Pb(II) sorption capacities of heat inactivated, detergent, NaOH, DMSO and AcOH pretreated B. cinerea cells were determined as 107.10 ± 1.87, 57....

Adsorption of copper ions onto Capsicum annuum (red pepper) seeds was investigated with the variation in the parameters of pH, contact time, adsorbent and copper(II) concentrations and temperature. The nature of the possible adsorbent and metal ion interactions was examined by the FTIR technique. The copper(II) adsorption equilibrium was attained w...

The biosorption of Cd(II) and Cu(II) ions on Botrytis cinerea (B. cinerea) fungal biomass has been investigated as a function of initial pH, contact time and initial metal ion concentration in a batch system. Optimum conditions were determined by heat inactivated biomass before pretreated biosorbent performances were investigated. Maximum biosorpti...