微生物和废糖蜜协同作用高效去除重金属。
Efficient removal of heavy metals by synergistic actions of microorganisms and waste molasses.
机构信息
Key Laboratory of Catalysis Conversion and Energy Materials Chemistry of Ministry of Education, PR China; Engineering Research Center for Heavy Metal Pollution Control of Hubei Province, College of Resources and Environmental Science, South-Central University for Nationalities, Wuhan 430074, PR China.
Engineering Research Center for Heavy Metal Pollution Control of Hubei Province, College of Resources and Environmental Science, South-Central University for Nationalities, Wuhan 430074, PR China.
出版信息
Bioresour Technol. 2020 Apr;302:122797. doi: 10.1016/j.biortech.2020.122797. Epub 2020 Jan 13.
In this study, two bacteria strains (Enterobacter sp. SL and Acinetobacter sp. SL-1) and waste molasses (carbon source) were used to remove Zn(II), Cd(II), Cr(VI), and Cr(Total) in the liquid solution (87 mg·L). The results showed the removal efficiencies of Cr(Total) and Cr(VI) could reach over 98.00% after reaction, and the removal efficiencies of Zn(II) and Cd(II) were all about 90.00% by the synergistic actions of microorganisms and waste molasses. In this process, waste molasses provides nutrients for microorganisms and has the characteristics and capability of Cr, Zn, and Cd. Microorganisms mainly use biological adsorption (36.95% and 45.69%) and metabolism (24.37% and 17.05% by producing humic-acid and fulvic-acid like substances) to remove Zn(II) and Cd(II), while waste molasses could to remove Cr(Total) (81.24%) and Cr(VI) (75.90%). This study has potential application value for the treatment of wastewater containing high concentrations of heavy metals.
在这项研究中，使用了两种细菌菌株（肠杆菌 sp. SL 和不动杆菌 sp. SL-1）和废糖蜜（碳源）来去除液体溶液中的 Zn(II)、Cd(II)、Cr(VI) 和 Cr（总）（87mg·L）。结果表明，反应后 Cr（总）和 Cr(VI)的去除率均超过 98.00%，而 Zn(II)和 Cd(II)的去除率均约为 90.00%，这是微生物和废糖蜜协同作用的结果。在这个过程中，废糖蜜为微生物提供营养物质，同时具有 Cr、Zn 和 Cd 的特性和能力。微生物主要通过生物吸附（36.95%和 45.69%，通过产生类似腐殖酸和富里酸的物质）和代谢（通过产生类似腐殖酸和富里酸的物质分别去除 24.37%和 17.05%）来去除 Zn(II)和 Cd(II)，而废糖蜜则可以去除 Cr（总）（81.24%）和 Cr(VI)（75.90%）。这项研究对于处理含有高浓度重金属的废水具有潜在的应用价值。
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