富里酸和Ca^(2+)共存对嗜酸性氧化亚铁硫杆菌介导生成次生高铁矿物的影响  

Effects of fulvic acid and Ca^(2+) coexistence on the formation of secondary ferrate minerals mediated by Acidithiobacillus ferrooxidans

作　　者：黄海涛[1,2] 王崇 耿康慧 魏彩春[1,2] 靳振江[1,2] 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)

机构地区：[1]桂林理工大学广西环境污染控制理论与技术重点实验室,岩溶地区水污染控制与用水安全保障协同创新中心,广西桂林541004 [2]桂林理工大学环境科学与工程学院,广西桂林541004 [3]桂林理工大学生态环保现代产业学院,广西桂林541004

出　　处：《环境污染与防治》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)。

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.

关 键 词：酸性矿山废水 嗜酸性氧化亚铁硫杆菌 富里酸 CA^(2+) 次生高铁矿物 

分 类 号：X172[环境科学与工程—环境科学] X75