硫酸盐还原菌处理铅、锌、锑尾矿库含锑废水的研究
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摘要
研究考察了硫酸盐还原菌(SRB)最佳生长条件、含Sb废水处理能力,并探究SRB处理酸雨淋滤过程中尾矿含Sb废水的能力。试验表明SRB最佳生长条件为pH值为6.0~8.0,温度为30~35℃,接种量15%;当Sb质量浓度为10 mg/L时,SRB对Sb的去除率达到97.1%,即使Sb质量浓度高达1 000 mg/L时,SRB仍然具备处理Sb的能力。柱状淋滤试验表明,SBR通过还原硫酸盐形成固体硫化物沉淀、抑制尾矿渗滤液pH值降低趋势,可以有效降低酸雨淋滤尾矿库重金属溶出的风险。
In this study, the optimum growth conditions and the treatment capacity on antimony containing wastewater of sulfate-reducing bacteria(SRB) were investigated. Meanwhile,the effect of SRB on the change of antimony content in tailing leachate during acid rain leaching was explored. The test showed the optimum conditions of SRB were pH 6.0 ~ 8.0, temperature of 30 ~35 ℃, inoculation amount of 15%. When the initial content of antimony is 10 mg/L, the remove rate of antimony reach to97.1%. SRB has the ability to treat antimony even the antimony concentration was as high as 1 000 mg/L. The column leaching test showed, SBR can effectively reduce the risk of heavy metal dissolution in acid rain leaching tailings by the process of reducing sulfate to solid sulfide precipitation and inhibiting the pH reduction trend of tailings leachate.
In this study, the optimum growth conditions and the treatment capacity on antimony containing wastewater of sulfate-reducing bacteria(SRB) were investigated. Meanwhile,the effect of SRB on the change of antimony content in tailing leachate during acid rain leaching was explored. The test showed the optimum conditions of SRB were pH 6.0 ~ 8.0, temperature of 30 ~35 ℃, inoculation amount of 15%. When the initial content of antimony is 10 mg/L, the remove rate of antimony reach to97.1%. SRB has the ability to treat antimony even the antimony concentration was as high as 1 000 mg/L. The column leaching test showed, SBR can effectively reduce the risk of heavy metal dissolution in acid rain leaching tailings by the process of reducing sulfate to solid sulfide precipitation and inhibiting the pH reduction trend of tailings leachate.
引文
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[12]WANG H, CHEN F, MU S, et al. Removal of antimony(Sb(V))from Sb mine drainage:biological sulfate reduction and sulfide oxidation-precipitation.[J].Bioresource technology, 2013, 146(10):799-802.
[13]柳凤娟,张国平,付志平,等.不同碳源中硫酸盐还原菌生长状况及对砷、锑去除效率研究[J].地球与环境,2018,46(2):179-187.
[14]陈炜婷,张鸿郭,陈永亨,等.pH、温度及初始铊浓度对硫酸盐还原菌脱铊的影响[J].环境工程学报,2014,8(10):4 105-4 109.
[15]王光远.铅锌尾矿库重金属污染微生物原位修复[D].北京:北京有色金属研究总院, 2016.
[16]石太宏,杨娣,冯玉香,等.SAPS处理酸性矿山废水的模拟应用研究[J].环境工程学报,2015,9(5):2 277-2 283.
[2]宁增平,肖唐付,杨菲,等.锑矿区水体水环境锑污染及硫同位素示踪研究[J].矿物岩石地球化学通报,2011,30(2):135-141.
[3]吴丰昌,郑建,潘响亮,等.锑的环境生物地球化学循环与效应研究展望[J].地球科学进展,2008(4):350-356.
[4]刘惠欣,李富平.矿区尾矿土壤生物修复技术[J].江苏环境科技,2008,21(S1):139-141.
[5]陈秋平,胥思勤,陈洁薇,等.锑矿区土壤重金属污染及植物累积特征[J].环境科技,2014,27(2):1-4.
[6]江峰,孙容容,梁振声,等.硫酸盐还原菌处理酸性矿山废水的研究进展[J].华南师范大学学报(自然科学版),2018,50(2):1-10.
[7]方艳,闵小波,柴立元,等.硫酸盐还原菌(SRB)污泥固定化小球还原硫酸盐的动力学研究[J].工业安全与环保,2007(3):1-4.
[8]宋霄敏,贡俊,白红娟,等.硫酸盐还原菌去除铅的实验研究[J].工业安全与环保,2016,42(1):4-7.
[9]KIRAN M G, PAKSHIRAJAN K, DAS G. Heavy metal removal from multicomponent system by sulfate reducing bacteria:Mechanism and cell surface characterization[J]. Journal of hazardous materials, 2017,324(A):62-70.
[10]欧阳小雪,张国平,李海霞,等.用硫酸盐还原菌去除废水中锑的实验研究[J].地球与环境, 2014, 42(5):663-668.
[11]吴琼,张国平,付志平,等.硫酸盐还原菌去除流动废水中锑的研究[J].地球与环境, 2016, 44(6):691-698.
[12]WANG H, CHEN F, MU S, et al. Removal of antimony(Sb(V))from Sb mine drainage:biological sulfate reduction and sulfide oxidation-precipitation.[J].Bioresource technology, 2013, 146(10):799-802.
[13]柳凤娟,张国平,付志平,等.不同碳源中硫酸盐还原菌生长状况及对砷、锑去除效率研究[J].地球与环境,2018,46(2):179-187.
[14]陈炜婷,张鸿郭,陈永亨,等.pH、温度及初始铊浓度对硫酸盐还原菌脱铊的影响[J].环境工程学报,2014,8(10):4 105-4 109.
[15]王光远.铅锌尾矿库重金属污染微生物原位修复[D].北京:北京有色金属研究总院, 2016.
[16]石太宏,杨娣,冯玉香,等.SAPS处理酸性矿山废水的模拟应用研究[J].环境工程学报,2015,9(5):2 277-2 283.