The removal of Cu(II) from dilute aqueous solutions by Saccharomyces cerevisiae

Biomass of cyanobacterial bloom from Lake Dianchi was used as a biosorbent for copper removal from aqueous solution. The maximum capacity was found at conditions of pH 4, initial concentration of copper was 10 mg/l and initial dose of biomass was 1.0 g/l. HNO 3 demonstrated the highest desorption efficiency compared with HCl, EDTA, and citric acid. Physical adsorption was assumed not to be the dominant mechanism of biosorption as revealed by scanning electron microscopy and surface area measurement of the biomass. Infrared ray spectra analysis of the biomass suggested that ion-exchange is the principal mechanism for biosorption. Considering the advantages-low cost, easy to collect, and huge in quantity-the Microcystis bloom biomass could be used as a sorbent for copper and other heavy metals removal.

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“…when a high Cu 2? concentration was applied at a low suspension pH could explain this phenomenon [9]. However, the lower the initial Cu 2?…”

Section: Influence Of Different Initial Cu 2? Concentrationsmentioning

confidence: 99%

Biosorption of Copper by Cyanobacterial Bloom-Derived Biomass Harvested from the Eutrophic Lake Dianchi in China

Wang

Liu

2010

Curr Microbiol

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“…Metal uptake by living fungi can often be divided into two main phases. The first, which can also occur with dead cells, is the often rapid, metabolismindependent binding to cell walls and other external surfaces; the second is energy-dependent intracellular uptake across the cell membrane (Tsezos, Baird & Shemilt, 1986;Gadd, 1986aGadd, , 6, 1988Huang et aL, 1990). In some cases, particularly where toxicity is evident, intracellular uptake may not be linked with metabolism but may be a consequence of increased membrane permeability and resultant exposure of metal-binding sites within the cell.…”

Section: Mechanisms Of Heavy Metal and Radionuclide Accumulation By Fmentioning

confidence: 99%

“…l.2?\ Mn''\ Cu'+, Zn''\ Cd'", Ba^^ Hg^^ Pb^+, UO^^^ and Ag+, but not Cr^+ or the alkali metal cations, Na^, K^, Cs^ and Rb"*^, which were not taken up by the cell walls (Tobin, Cooper & Neufeld, 1984). Low external pH often decreases biosorption of, e.g., Cu'^^, Cd'^+, Zn-^ Mn'^^ and Co'" ( Fuhrmann & Rothstein, 1968;Paton & Budd, 1972;Roomans et al, 1979;De Rome & Gadd, 1987a, b;Gadd, 1990a;Huang, Huang & Morehart, 1990) while other anions and cations may have the same effect by, e.g. precipitation by phosphates, and removal of metal from solution or by competition for binding sites, e.g., Mg^^ Ca'", Zn-+, Cu^^ and Mn^^ (Tobin, Cooper & Neufeld, 1987.…”

Section: Metal Binding To Cell Wallsmentioning

confidence: 99%

“…Commercial processes using immobilized bacteria and algae already exist, particularly for recovery of valuable metals (Brierley et al, 1986). Fungal examples of laboratory-scale immobilized systems include A. oryzae and R. arrhizus on reticulated foam particles (KifT & Little, 1986;Lewis & KifT, 1988) and Trichoderma viride packed in molochite and used for Cu removal from simulated effluents (Townsley, Ross & Atkins, 19866), S. cerevisiae immobilized in a sand column and used for removal of Cu(ii) (Huang et al, 1990), and microfungal biomass incorporated into filters derived from paper and textile fibres (Wales & Sagar, 1990).…”

Section: Industrial Considerationsmentioning

confidence: 99%

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Interactions of fungi with toxic metals

1993

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SUMMARY This review details the major interactions of fungi with toxic metal species. Physico‐chemical and biological aspects are discussed including definitions and classification of metals in biological contexts, mechanisms of metal fungitoxicity, resistance and tolerance, environmental influences and the occurrence of fungi in metal‐polluted habitats. Cellular interactions include extracellular precipitation and complexation, binding to cell walls, transport of monovalent and divalent metal cations, intracellular fates of toxic metal species (including metal‐binding proteins and peptides, and vacuolar compartmentation), and metal transformations including organometal(loid) synthesis. Significant interactions between metals and mycorrhizal fungi and macrofungi are summarized with reference to the amelioration of plant phytotoxicity and metal accumulation respectively. Biotechnological aspects of metal‐fungal interactions relate to the biological treatment of metal‐contaminated effluents and waste streams for metal removal/recovery and environmental protection.

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“…These methods include chemical oxidation, reduction, chemical precipitation, solvent extraction, ion-exchange, adsorption, membrane filtration, coagulationflocculation, flotation and electrochemical methods (Suzuki 1997;Ochie et al 2008;Barakat, 2011;Fenglian and Wang, 2011). Among these methods, the adsorption can be an effective method in heavy metals treatment (Huang and Morehart, 1990;Bayat, 2002;Suzuki et al, 2005;Ahmad et al 2010;Bilal et al 2013). Huge economic sorbents can be used as materials which are abundant in nature or can be originated as a waste or byproduct from industry.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Copper Removal from Aqueous Solution by Cement Kiln Dust as Industrial By-Product

2017

Alexandria Science Exchange Journal: An International Quarterly

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This study investigated the copper (Cu +2 ) removal from aqueous solution by cement kiln dust (CKD) as industrial by-product in cement manufacturing process. CKD was identified by Fourier transform infrared (FTIR), scanning electron microscopy (SEM) and surface areas show the differences of physicochemical properties. Batch equilibrium experiments were carried out at 20, 25 and 30 o C with time intervals extended to 96 h to investigate the efficiency of the CKD in the removal of Cu +2 . CKD expressed high affinity for removal of Cu +2 and was not affected by temperature or time. The removal of Cu +2 was indicated by changes of FTIR and SEM images before and after sorption experiments. The kinetic data were evaluated by fractional power, Elovich, pseudo-first order and pseudo-second-order kinetic models. The kinetic studies demonstrated that rate of the removal followed pseudo-second-order kinetic model (r 2 =0.99). Thermodynamic parameters, the change of free energy (ΔG•), enthalpy (ΔH•) and entropy (ΔS • ) were calculated for predicting the nature of adsorption. The parameters showed that the process was feasible, spontaneous and exothermic under experiment conditions. Solubility equilibrium for various expected copper compounds was estimated and the solubility of copper in Cu-CKD system suggested to be controlled by Cu CO 3 precipitation under experiment condition. The results indicated that CKD can be used as a low cost and effective sorbent for copper ions from aqueous solutions.

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The removal of Cu(II) from dilute aqueous solutions by Saccharomyces cerevisiae

Cited by 271 publications

References 18 publications

Biosorption of Copper by Cyanobacterial Bloom-Derived Biomass Harvested from the Eutrophic Lake Dianchi in China

Biosorption of Copper by Cyanobacterial Bloom-Derived Biomass Harvested from the Eutrophic Lake Dianchi in China

Interactions of fungi with toxic metals

Investigation of Copper Removal from Aqueous Solution by Cement Kiln Dust as Industrial By-Product

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