Bioleaching of Heavy Metals from Textile Sludge by Indigenous Sulfur-and-Iron-Oxidizing Microorganisms Using Elemental Sulfur and Ferrous Sulfate as Energy Sources: A Comparative Study
Bioleaching of Heavy Metals from Textile Sludge by Indigenous Sulfur-and-Iron-Oxidizing Microorganisms Using Elemental Sulfur and Ferrous Sulfate as Energy Sources: A Comparative Study
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DOI：
10.1080/01490451.2013.876467
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发表时间：
2014-02
影响因子：
2.3
通讯作者：
Kapil Kumar;S. Suthar;M. G. Dastidar;T. R. Sreekrishnan
中科院分区：
文献类型：
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作者：
Kapil Kumar;S. Suthar;M. G. Dastidar;T. R. Sreekrishnan
本研究进行了调查的潜力丰富的土著硫和铁氧化微生物在生物浸出的铜，镍，锌和铁的纺织污泥通过使用元素硫和硫酸亚铁（FS），分别作为一种能源，在批量条件下。使用三种不同的纺织污泥（S1、S2和S3）在从该国不同地区（即，北方邦、哈里亚纳邦和旁遮普。所用的三种污泥不仅来自全国不同地区，而且理化特性也不同。在每个污泥中的重金属溶解的程度被发现是不同的使用硫和铁氧化微生物。研究结果表明，硫氧化微生物被发现更有效的生物浸出过程中，无论任何污泥。硫氧化微生物的使用导致更高的重金属溶解，并且在7天的生物浸出之后，与使用铁氧化微生物的62-73%的Cu、62-66%的Ni、74 - 78%的Zn和70-78%的Fe相比，约84-96%的Cu、64 - 78%的Ni、81-92%的Zn和74-88%的Fe被去除。研究结果表明，生物淋滤工艺处理重金属污染的纺织污泥是可行的。本研究结果表明，生物沥滤污泥土地利用是安全的。
The present study was undertaken to investigate the potential of enriched indigenous sulfur-and-iron-oxidizing microorganisms in the bioleaching of Cu, Ni, Zn and Fe from textile sludges by using elemental sulfur and ferrous sulfate (FS), respectively, as an energy source under batch conditions. The experiments were performed with three different textile sludges (S1, S2 and S3) at initial neutral pH of the sludges procured from different parts of the country i.e., UP, Haryana and Punjab. The three sludges used were not only procured from different parts of the country but also differ in physiochemical characteristics. The extent of heavy metals solubilization in each sludge was found to be different using sulfur- and iron-oxidizing microorganisms. The results of the study indicate that sulfur-oxidizing microorganisms were found more efficient in the bioleaching process, irrespective of any sludge. The use of sulfur-oxidizing microorganisms led to higher solubilization of heavy metals and after 7 days of bioleaching about 84–96% Cu, 64–78% Ni, 81–92% Zn and 74–88% Fe were removed compared to 62–73% Cu, 62–66% Ni, 74–78% Zn and 70–78% Fe using iron-oxidizing microorganisms. This study had shown the feasibility of applying the bioleaching process to textile sludge contaminated with heavy metals. The results of the present study indicate that the bioleached sludge would be safer for land application.