摘要
为揭示富里酸和Ca^(2+)共存对嗜酸性氧化亚铁硫杆菌(Acidithiobacillus ferrooxidans)氧化酸性矿山废水(AMD)中的Fe^(2+)和形成次生高铁矿物的影响,分析了pH、Fe^(2+)氧化率、铁沉淀率以及次生高铁矿物矿相、基团等相关指标。结果表明,Ca^(2+)确实具有提高嗜酸性氧化亚铁硫杆菌氧化Fe^(2+)的能力。低质量浓度(0.2 g/L)的富里酸对嗜酸性氧化亚铁硫杆菌活性的提高具有促进作用,高质量浓度(0.4 g/L)的富里酸具有抑制作用,而增加Ca^(2+)反过来能够减弱高浓度富里酸对嗜酸性氧化亚铁硫杆菌的抑制作用。对形成的次生高铁矿物进行X射线衍射(XRD)和傅立叶红外光谱(FTIR)分析,结果表明高浓度富里酸促进了另一次生高铁矿物草黄铁矾的生成。
In order to explore the effects of fulvic acid and Ca^(2+)coexistence on the oxidation of Fe 2+and the formation of secondary ferrate minerals by Acidithiobacillus ferrooxidans in the treatment of acid mine drainage,pH,Fe 2+oxidation rate,Fe precipitation rate,and secondary ferrate minerals phase and radical group were analyzed.Results showed that Ca^(2+)really had the ability to enhance the oxidation of Fe 2+by Acidithiobacillus ferrooxidans.Low mass concentration of fulvic acid(0.2 g/L)promoted the oxidation ability of Acidithiobacillus ferrooxidans,but high mass concentration of fulvic acid(0.4 g/L)inhibited.However,increasing Ca^(2+)concentration could weaken the inhibition effect of fulvic acid on Acidithiobacillus ferrooxidans.The formed secondary ferrate minerals were analyzed by X-ray diffractometer and Fourier transform infrared spectrometer.The results showed that high mass concentration of fulvic acid helped to form another secondary ferrate mineral carphosiderite.
作者
黄海涛
王崇
耿康慧
魏彩春
靳振江
HUANG Haitao;WANG Chong;GENG Kanghui;WEI Caichun;JIN Zhenjiang(Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology,Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area,Guilin University of Technology,Guilin Guangxi 541004;College of Environmental Science and Engineering,Guilin University of Technology,Guilin Guangxi 541004;Modern Industry College of Ecology and Environmental Protection,Guilin University of Technology,Guilin Guangxi 541004)
出处
《环境污染与防治》
CAS
CSCD
北大核心
2024年第2期169-173,180,共6页
Environmental Pollution & Control
基金
广西环境污染控制理论与技术重点实验室研究基金资助项目(No.1601Z005)
桂林理工大学科研启动基金资助项目(No.2005020)。
