Comparative studies on the microbial adsorption of heavy metals
Comparative studies on the microbial adsorption of heavy metals
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DOI：
10.1016/s1093-0191(02)00004-7
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发表时间：
2003-01-01
期刊：
影响因子：
--
通讯作者：
Banerjee, UC
中科院分区：
文献类型：
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作者：
Goyal, N;Jain, SC;Banerjee, UC
竞争性生物吸附的过程中的Cr（VI）和Fe（III）离子的链球菌equisimilis，酿酒酵母和尼日尔曲霉的描述和比较单一的金属离子吸附在溶液中。这三种微生物吸附金属离子[Cr（VI）和Fe（III）]的能力显示为金属浓度、pH、温度、生长培养基组成、培养物年龄和与生物吸附剂接触时间的函数。研究了在吸附介质中添加葡萄糖、果糖和蔗糖形式的额外能源对微生物吸附金属离子的影响。Freundlich常数由所有生物的Freundlich吸附等温线确定。从吸附剂中吸附的金属可以用0.1 M氢氧化钠原位再生。(C)2002爱思唯尔科技有限公司。保留所有权利。
A process of competitive biosorption of Cr(VI) and Fe(III) ions on Streptococcus equisimilis, Saccharomyces cerevisiae and Aspergillus niger is described and compared to single metal ion adsorption in solution. The ability of these three microorganisms to adsorb metal ions [Cr(VI) and Fe(III)], is shown as a function of metal concentration, pH, temperature, growth medium composition, culture age and contact time with the biosorbents. The effect of addition of an extra energy source in the form of glucose, fructose and sucrose in the adsorption medium is studied for the biosorption of metal ions by microorganisms. Freundlich constants are determined from the Freundlich adsorption isotherms for all the organisms. The adsorbed metals from the sorbents can be regenerated in situ with 0.1 M sodium hydroxide. (C) 2002 Elsevier Science Ltd. All rights reserved.