Recent trends in the biosorption of heavy metals: A review

Sağ, Yeşim; Kutsal, Tülin

doi:10.1007/bf02932318

Cited by 93 publications

(44 citation statements)

References 49 publications

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“…The Freundlich [35] and Langmuir [36] models were used to evaluate the sorption of Cr VI onto cassava waste biomass. The Langmuir equation is usually represented by Eqn.…”

Section: Experimental Partmentioning

confidence: 99%

Sorption of Chromium(VI) from Aqueous Solution by Cassava (Manihot sculenta Cranz.) Waste Biomass

Horsfall

Ogban

Akporhonor

2006

Chemistry & Biodiversity

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The sorption of highly toxic Cr(VI) ions by cassava waste biomass was quantitatively investigated. The sorption was found to be influenced by several physico-chemical factors such as agitation speed, temperature, contact time, pH, and sorbent/sorbate ratio. The adsorption data at equilibrium were fitted to Freundlich and Langmuir isotherms. The monolayer sorption capacity was found to be 61.79 mg of Cr(VI) per gram of biomass. The kinetics of Cr(VI) adsorption to pure cassava-tuber-bark wastes were determined based on a pseudo-second-order-rate model using the batch-sorption technique at a temperature of 30 degrees. The kinetics data suggest that the adsorption process is exothermic, and that the rate-limiting step is physisorption. Negative DeltaG(ads) values indicate that the adsorption is spontaneous and exothermic in nature. Also, under optimal conditions (in agitated 1M H(2)SO(4) at 30 degrees), the cassava waste biomass appears to be recyclable.

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“…The Freundlich [35] and Langmuir [36] models were used to evaluate the sorption of Cr VI onto cassava waste biomass. The Langmuir equation is usually represented by Eqn.…”

Section: Experimental Partmentioning

confidence: 99%

Sorption of Chromium(VI) from Aqueous Solution by Cassava (Manihot sculenta Cranz.) Waste Biomass

Horsfall

Ogban

Akporhonor

2006

Chemistry & Biodiversity

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“…The Freundlich isotherm is the most widely used non-linear sorption model (7,8,10). It is given by the general form: qe = Kp .cen (4), where Kp relates to sorption capacity and n to sorption intensity.…”

Section: Microorganisms Medium and Cultivation Mutant Strain Aspergmentioning

confidence: 99%

Copper Adsorption by Free and Immobilized on Polyurethane Foam Cells ofAspergillus niger

Tsekova¹,

Marinov

Ilieva³

et al. 2001

Biotechnology & Biotechnological Equipment

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“…Pretreatment of adsorbent is also commonly used to increase the adsorption capacity of these materials. Several researches have made significant contributions in this area, utilizing a number of materials including fly ash [23,24], sugar beet pulp [25], clay [26,27], chitosan [28], coconut coirpitch carbon [29], biomass [30,31], zeolites [32,33], rice bran, soybeans and cotton seed hulls [34], sunflower stalks [35], low-grade phosphate [15], tea leaves [36], natural zeolite [37], almond shells, olive stones and peach [38], sediments of rivers [39], peanut hull [40], bentonite [41], saw dust [42,43], baggage fly ash [44], banana and orange peels [45], carrot residue [46], etc. The objective of this study was to investigate comparative adsorption characteristics for removal of Ni(II) from aqueous solution by the use of low-cost abundantly available nonconventional adsorbents like calcined phosphate, red mud and clarified sludge.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Nickel from aqueous solution by the use of low-cost adsorbents

Hannachi

N.A.Shapovalov

Hannachi³

2010

Korean J. Chem. Eng.

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The removal of Ni(II) from aqueous solution by different adsorbents was investigated. Calcined phosphate, red mud, and clarified sludge (a steel industry waste material) were used for the adsorption studies. The influence of pH, contact time, initial metal concentration, adsorbent nature and concentration on the selectivity and sensitivity of the removal process was investigated. The adsorption process was found to follow a first-order rate mechanism and rate constant was evaluated at 30 o C. Langmuir and Freundlich adsorption isotherms fit well in the experimental data and their constants were evaluated. The thermodynamic equilibrium constant and the Gibbs free energy were calculated for each system. The adsorption capacity (q max ) calculated from Langmuir isotherm and the values of Gibbs free energy obtained showed that calcined phosphate has a higher capacity and affinity for the removal of Ni(II) compared to the other adsorbents used in the study.

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Recent trends in the biosorption of heavy metals: A review

Cited by 93 publications

References 49 publications

Sorption of Chromium(VI) from Aqueous Solution by Cassava (Manihot sculenta Cranz.) Waste Biomass

Sorption of Chromium(VI) from Aqueous Solution by Cassava (Manihot sculenta Cranz.) Waste Biomass

Copper Adsorption by Free and Immobilized on Polyurethane Foam Cells ofAspergillus niger

Adsorption of Nickel from aqueous solution by the use of low-cost adsorbents

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