Abstract：
:The removal of chromate anions (CrO(4)(2-)) from aqueous solution by a cationic surfactant-modified yeast was studied in a batch system. Cetyl trimethyl ammonium bromide (CTAB) was used for biomass modification; it substantially improved the biosorption efficiency. The influences of solution pH, CrO(4)(2-) anion concentrations and biomass concentration on the biosorption efficiency were investigated. The biosorption of chromate anions by modified yeast was strongly affected by pH. The optimum pH for biosorption of CrO(4)(2-) by modified yeast was 4.5-5.5. Zeta potential values of modified and unmodified yeast were determined at various pH values. Concentrations ranging from 5.2 to 208 mg/l Cr(VI) were tested and the biosorptive removal efficiency of the metal ions from aqueous solution was more than 99.5%. Freundlich and Langmuir isotherms were used to evaluate the data and the regression constants were determined.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Bingol A,Ucun H,Bayhan YK,Karagunduz A,Cakici A,Keskinler Bdoi
10.1016/j.biortech.2004.01.018subject
Has Abstractpub_date
2004-09-01 00:00:00pages
245-9issue
3eissn
0960-8524issn
1873-2976pii
S0960852404000264journal_volume
94pub_type
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