零价铁固定硫酸盐还原菌颗粒特性试验分析
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摘要
针对煤矿酸性废水(AMD)中SO_4~(2-)、Cr~(6+)和Cr~(3+)含量高,p H值低等特点,基于微生物固定化技术,以零价铁屑(ZVSI)和玉米芯为主要基质成分,与硫酸盐还原菌(SRB)有机结合,制备ZVSI-SRB颗粒处理AMD。为探究颗粒对SO_4~(2-)去除机理,采用相关动力学模型对单一污染物离子去除过程进行数学拟合。结果显示,ZVSI-SRB颗粒对SO_4~(2-)还原动力学过程更符合一级反应动力学模型。通过相关仪器表征,显示反应后颗粒内明显出现Fe S结晶物,表明颗粒反应过程中发生了一系列复杂的物化及生化反应。
In view of the high content of SO_4~(2-),Cr~(6+)and Cr~(3+)in acid mine drainage(AMD)and low pH,based on microbial immobilization technology,zero-valent iron filings(ZVSI)and corncob are the main matrix components,and sulfate-reducing bacteria(SRB)organically combined to prepare ZVSI-SRB particles for AMD treatment.In order to explore the particle removal mechanism of SO_4~(2-),the related kinetic model was used to mathematically fit the single contaminant ion removal process.The results show that the ZVSI-SRB particles are more in line with the first-order reaction kinetics model for the SO_4~(2-)reduction kinetics.Characterization by related instruments showed that two crystals of FeS appeared in the particles after the reaction,indicating that a series of complex physicochemical and biochemical reactions occurred during the particle reaction.
In view of the high content of SO_4~(2-),Cr~(6+)and Cr~(3+)in acid mine drainage(AMD)and low pH,based on microbial immobilization technology,zero-valent iron filings(ZVSI)and corncob are the main matrix components,and sulfate-reducing bacteria(SRB)organically combined to prepare ZVSI-SRB particles for AMD treatment.In order to explore the particle removal mechanism of SO_4~(2-),the related kinetic model was used to mathematically fit the single contaminant ion removal process.The results show that the ZVSI-SRB particles are more in line with the first-order reaction kinetics model for the SO_4~(2-)reduction kinetics.Characterization by related instruments showed that two crystals of FeS appeared in the particles after the reaction,indicating that a series of complex physicochemical and biochemical reactions occurred during the particle reaction.
引文
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[2]白润才,李彬,李三川,等.矿山酸性废水处理技术现状及进展[J].长江科学院院报,2015,32(2):14-19.
[3]左莉娜,贺前锋.酸性矿山废水的治理技术现状及进展[J].环境工程,2013,31(5):35-38.
[4]牟力,何腾兵,黄会前,等.酸性矿山废水治理技术的研究进展[J].天津农业科学,2017,23(2):42-45.
[5]周争,赵丽,葛小鹏,等.酸性矿井水中和沉淀法除铁优化[J].环境工程学报,2014,8(6):2347-2352.
[6]张智钧.利用微生物提高酸性矿山废水中除磷的能力[J].资源节约与环保,2014(11):76-76.
[7]安文博,王来贵,狄军贞.铁屑协同SRB污泥固定化颗粒处理AMD动态试验研究[J].非金属矿,2017(4):8-11.
[8]狄军贞,王明昕,赵微,等.麦饭石固定化SRB污泥颗粒处理模拟煤矿酸性废水的适应性[J].环境工程学报,2017,11(7):3985-3990.
[9]狄军贞,任亚东,郭俊杰,等.用作固定SRB碳源的玉米芯的最佳改性条件[J].环境工程学报,2017,11(8):4566-4570.
[10]李爱华.生物可渗透性活性材料修复渗滤液污染地下水的试验研究[D].阜新:辽宁工程技术大学,2013.
[11]国家环境保护总局.水和废水监测分析方法[M].4版.北京:中国环境科学出版社,2002.
[12]狄军贞,江富,朱志涛,等.玉米芯为碳源固定化硫酸盐还原菌污泥代谢特性[J].环境工程学报,2015,9(4):1687-1692.
[13]狄军贞,王明昕,王晨阳,等.麦饭石SRB污泥固定颗粒的稳定性及生物活性实验[J].非金属矿,2016,39(3):36-39.
[14]狄军贞,安文博,戴男男,等.玉米芯为碳源铁屑协同生物麦饭石活化颗粒的硫酸盐还原动力学及其锰离子响应实验[J].环境工程学报,2016,10(3):1103-1108.