A comparative study on the biosorption characteristics of some yeasts for Remazol Blue reactive dye

被引:296
作者
Aksu, Z [1 ]
Dönmez, G
机构
[1] Hacettepe Univ, Dept Chem Engn, TR-06532 Ankara, Turkey
[2] Ankara Univ, Dept Biol, TR-06100 Ankara, Turkey
关键词
biosorption; Remazol Blue; reactive dye; yeast; isotherms; kinetics;
D O I
10.1016/S0045-6535(02)00623-9
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Biosorption capacities and rates of different kinds of dried yeasts (Saccharomyces cerevisiae, Schizosaccharomyces pombe, Kluyveromyces marxianus, Candida sp., C. tropicalis, C. lipolytica, C. wills, C. quilliermendii and C. membranaefaciens) for Remazol Blue reactive dye from aqueous solutions were compared under laboratory conditions as a function of initial pH and initial dye concentration. Optimum initial biosorption pH was determined as 2 for all the yeasts. All the yeast species showed comparable and very high dye sorption at 100 mg/l initial dye concentration. The equilibrium sorption capacity of the biomass increased with increasing initial dye concentration up to 400 mg/l for Candida sp. C. lipolytica and C. tropicalis; up to 300 mg/l for C. quilliermendii and C. utilis and up to 200 mg/l for S. cerevisiae, S. pombe, K marxianus and C. membranaefaciens while the adsorption yield of dye showed the opposite trend for all the yeasts. Among the nine yeast species, C. lipolytica exhibited the highest dye uptake capacity (Q(0) = 250 mg/g). Both the Freundlich and Langmuir adsorption models were found suitable for describing the biosorption of the dye by all the Candida yeasts (except C. membranaefacicns). The results indicated that the dye uptake process followed the pseudo-second-order kinetics for each dye-yeast system. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:1075 / 1083
页数:9
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