Comparison of the heavy metal sorptive properties of three types of immobilized, non-viable Saccharomyces cerevisiae biomass

Stoll, A.; Duncan, J.R.

doi:10.1016/s0032-9592(96)00093-3

Cited by 19 publications

(5 citation statements)

References 6 publications

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“…The immobilization process of algae is the same as that used in [17,18]. Where 70 g of the washed algae suspended in distilled water at 50% w/v.…”

Section: Procedures For Immobilization Of Algaementioning

confidence: 99%

Efficiency of Pre-Treated Immobilized Chara Algae (C. vulgaris) for Biosorption of Copper and Lead from Aqueous Solutions

Farhan

2022

DJES

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The present study evaluates the potential of chemically modified, immobilized Chara algae (C. vulgaris) to remove copper and lead from aqueous solutions. Chara algae were prepared and studied for their ability to remove heavy metal ions prepared solutions. In a batch mode, several factors affecting the adsorption process such pH, temperature, contacting period and algal dose on adsorption efficiency were studied. Results showed that the metal adsorption process takes place quickly at pH values (5.0-6.0), temperature level (25-30) oC and the order of the accumulated metal ions is Cu>pb.The results showed that the handling with low concentration of nitric acid at 0.05 normality was effective in the process of desorbing metal ions. So as for regeneration of algae, 0.2 M sodium hydroxide is very effective. The regenerative algae were used for five cycles of biosorption, without losing its demineralization efficacy. FTIR absorption spectroscopic analyzes showed that all groups that present in the algae are responsible for the main biological absorption of metal ions.Adsorption process specifications are more effective when using modification processes, as the maximum adsorption of algae for both lead and copper was within a range of 6.5-10.3 mg per gram of algae when using the alkaline treatment. While the acid treatment reduced the amount of adsorbent by 4.2-5.8 mg per gram algae; The adsorption process is fast and occurs by 90% within the first 15 min. Heavy metal adsorption was observed at very low levels at pH values as low as 2.0. Algae are effective in removing lead, copper and other light metal ions from wastewater.

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“…The immobilization process of algae is the same as that used in [17,18]. Where 70 g of the washed algae suspended in distilled water at 50% w/v.…”

Section: Procedures For Immobilization Of Algaementioning

confidence: 99%

Efficiency of Pre-Treated Immobilized Chara Algae (C. vulgaris) for Biosorption of Copper and Lead from Aqueous Solutions

Farhan

2022

DJES

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“…The biomass was immobilised using polyethyleneimine (50% aqueous polyethyleneimine, SigmaAldrich, Germany) and glutaraldehyde (50% aqueous glutaraldehyde, Sigma-Aldrich, Germany) as embedding and crosslinking agents, respectively, and subsequently treated with hot alkali (3% potassium hydroxide) solution according to the method described by Stoll & Duncan (1997).…”

Section: Biosorbent Preparationmentioning

confidence: 99%

Biosorptive recovery of platinum from platinum group metal refining wastewaters by immobilised Saccharomyces cerevisiae

Mack

Wilhelmi

Duncan

et al. 2011

Water Science and Technology

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The process of platinum group metal (PGM) refining can be up to 99.99% efficient at best, and although it may seem small, the amount of valuable metal lost to waste streams is appreciable enough to warrant recovery. The method currently used to remove entrained metal ions from refinery wastewaters, chemical precipitation, is not effective for selective recovery of PGMs. The yeast Saccharomyces cerevisiae has been found capable of sorbing numerous precious and base metals, and is a cheap and abundant source of biomass. In this investigation, S. cerevisiae was immobilised using polyethyleneimine and glutaraldehyde to produce a suitable sorbent, capable of high platinum uptake (150-170 mg/g) at low pH (<2). The sorption mechanism was found to be a chemical reaction, which made effective desorption impossible. When applied to PGM refinery wastewater, two key wastewater characteristics limited the success of the sorption process; high inorganic ion content and complex speciation of the platinum ions. The results proved the concept principle of platinum recovery by immobilised yeast biosorption and indicated that a more detailed understanding of the platinum speciation within the wastewater is required before biosorption can be applied. Overall, the sorption of platinum by the S. cerevisiae sorbent was demonstrated to be highly effective in principle, but the complexity of the wastewater requires that pretreatment steps be taken before the successful application of this process to industrial wastewater.

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“…Yeast biomass (Saccharomyces cerevisiae) was immobilised using polyethyleneimine (PEI) and gluteraldehyde (GA) as embedding and cross-linking agents, respectively; they were subsequently treated with hot alkali solution 11 (3% potassium hydroxide (KOH), Merck Chemicals, South Africa). Forty grams (wet weight) of yeast was mixed with 4 ml distilled water to form a smooth paste.…”

Section: Scanning Electron Microscopy With Energy-dispersive Analysismentioning

confidence: 99%

Metal–biomass interactions: a comparison of visualisation techniques available in South Africa

et al. 2010

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Comparison of the heavy metal sorptive properties of three types of immobilized, non-viable Saccharomyces cerevisiae biomass

Cited by 19 publications

References 6 publications

Efficiency of Pre-Treated Immobilized Chara Algae (C. vulgaris) for Biosorption of Copper and Lead from Aqueous Solutions

Efficiency of Pre-Treated Immobilized Chara Algae (C. vulgaris) for Biosorption of Copper and Lead from Aqueous Solutions

Biosorptive recovery of platinum from platinum group metal refining wastewaters by immobilised Saccharomyces cerevisiae

Metal–biomass interactions: a comparison of visualisation techniques available in South Africa

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