Chromium Adsorption by Three Yeast Strains Isolated from Sediments in Morocco

被引：21

作者：

Bahafid, Wifak ^{[1
]}

Joutey, Nezha Tahri ^{[1
]}

Sayel, Hanane ^{[1
]}

Iraqui-Houssaini, Mohamed ^{[1
]}

El Ghachtouli, Naima ^{[1
]}

机构：

[1] SMBA Univ, Microbial Biotechnol Lab, Fac Sci & Technol, Fes, Morocco

来源：

GEOMICROBIOLOGY JOURNAL | 2013年 / 30卷 / 05期

关键词：

biosorption; chromium; isotherms; pH; yeast biomass; WASTE-WATER; HEXAVALENT CHROMIUM; AQUEOUS-SOLUTIONS; HEAVY-METALS; ASPERGILLUS-NIGER; TOXIC METALS; BIOSORPTION; REMOVAL; EQUILIBRIUM; IONS;

D O I：

10.1080/01490451.2012.705228

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Biosorption is an effective method to remove heavy metals from wastewater. In this work, Biosorption of Cr(VI) has been investigated by live and dead cells of three yeasts species: Cyberlindnera fabianii, Wickerhamomyces anomalus and Candida tropicalis. Sorption experiments were conducted in aqueous solutions at various pH conditions. Cr(VI) adsorption was highly pH dependent and the results indicated that the most effective pH range was found to be between 2 and 4 for the three species. Adsorption isotherms were modeled with the Langmuir and Freundlich equations and isotherm constants were calculated. The adsorption capacity calculated from Langmuir isotherm was 18.9mg, 28.14mg and 29.1mg Cr(VI) g(-1) Cr(VI) g(-1) for C. fabianii, W. anomalus and C. tropicalis, respectively. The results suggest that the three yeasts could be used as effective adsorbents for the removal of Cr(VI) ions from contaminated sites.

引用

页码：422 / 429

页数：8

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