Determination of the heavy metal leaching mechanism from the sludge by acidophilic bacteria

被引：0
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作者：
Jiang, Tao [1 ]
Xia, Jing [2 ]
Tian, Yong-Jing [1 ,3 ]
Zhao, Wei [1 ]
Sun, Tian-Tian [1 ]
机构：
[1] School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou,215009, China
[2] CCDI (Suzhou) Exploration & Design Consultant CO.LTD, Suzhou,215009, China
[3] National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Suzhou University of Science and Technology, Suzhou,215009, China
来源：
Zhongguo Huanjing Kexue/China Environmental Science | 2020年 / 40卷 / 06期
关键词：
In order to determine the biological leaching mechanism of mixed strains; three biological leaching-experiments; i.e; adding leaching mixed strains + substrates (ferrous ammonium sulfate; sulfur powder); addingsubstrates alone andsulfuric acid alone were conducted to estimate the contribution from direct oxidation(F11); chemical oxidation (F12) and acid leaching (F13). These experiments were tested for the excess activated sludge to evaluate the leaching of Cu and Zn. Results show that for the leaching of Cu; the contribution rates of F11; F12; and F13 were 92.55%; 7.45%; and; 0%; respectively; indicating that the primary role of the direct mechanism. For the leaching of Zn; and F13 were 18.86%; 44.35%; 36.79%respectively; indicating the dominate role of an indirect mechanism. This method can determine the biological leaching mechanism of heavy metals under actual environmental conditions; and provide theoretical basis for related research and practical applications. © 2020; Editorial Board of China Environmental Science. All right reserved;
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页码：2529 / 2536
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