不同磷源对生物成因次生高铁矿物形成的影响  

Effects of Different Phosphorus Sources on the Formation of Biogenic Secondary Iron-rich Minerals

作　　者：黄海涛[1,2,3] 伍贤辉 魏陈 耿康慧 王崇 魏彩春 HUANG Hai-tao;WU Xian-hui;WEI Chen;GENG Kang-hui;WANG Chong;WEI Cai-chun(College of Environmental Science and Engineering,Guilin University of Technology,Guilin 541004,China;Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology,Guilin University of Technology,Guilin 541004,China;Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area,Guilin University of Technology,Guilin 541004,China;Modern Industry College of Ecology and Environmental Protection,Guilin University of Technology,Guilin 541004,China)

机构地区：[1]桂林理工大学环境科学与工程学院,广西桂林541004 [2]广西环境污染控制理论与技术重点实验室,广西桂林541004 [3]桂林理工大学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 [4]桂林理工大学生态环保现代产业学院,广西桂林541004

出　　处：《生态与农村环境学报》2025年第2期262-269,共8页Journal of Ecology and Rural Environment

基　　金：广西环境污染控制理论与技术重点实验室研究基金(1601Z005);桂林理工大学科研启动基金(GUTQDJJ 2001013;GUTQDJJ 2005020)。

摘　　要：为揭示不同磷源对嗜酸性氧化亚铁硫杆菌(Acidithiobacillus ferrooxidans)氧化Fe^(2+)和次生高铁矿物形成的影响,进而为酸性矿山废水治理提供理论依据,通过摇瓶试验分析了pH值、Fe^(2+)氧化率、总Fe沉淀率以及次生高矿物矿相等相关指标的变化情况。结果表明,A.ferrooxidans对不同磷源的利用存在差异。在试验结束时,以NaH_(2)PO_(4)、Na_(2)HPO_(3)、NaH_(2)PO_(2)作为磷源的反应体系pH值分别为2.02、2.12、2.11,Fe^(2+)平均氧化速率分别为1.04、2.08、1.04 h^(-1),总铁(TFe)沉淀率分别为33%、30%、28%,收集的矿物质量分别为1.58、1.34、1.17 g,对收集的矿物进行X射线衍射(XRD)、傅里叶红外光谱(FTIR)以及扫描电镜(SEM)分析可知,以Na_(2)HPO_(3)、NaH_(2)PO_(2)作为磷源的反应体系生成的矿物主要为施氏矿物,以NaH_(2)PO_(4)作为磷源的反应体系生成的矿物主要为黄钾铁矾和施氏矿物的混合物,其中黄钾铁矾所占比例较大。The effects of different phosphorus sources on the oxidation of Fe^(2+)by Acidithiobacillus ferrooxidans and the formation of secondary iron-rich minerals were studied to provide a theoretical basis for the treatment of acid mine drainage.Changes in the pH,Fe^(2+)oxidation rate,total Fe precipitation rate,facies of the secondary minerals and other related indicators were analyzed in shaking flask experiments.The results show that there were differences in the utilization of different phosphorus sources by Acidithiobacillus ferrooxidans.At the end of the experiments,the results for systems with NaH_(2)PO_(4),Na_(2)HPO_(3)and NaH_(2)PO_(2)as the phosphorus source,respectively,were 2.02,2.12 and 2.11 for pH,1.04,2.08 and 1.04 h^(-1)for average oxidation rate of Fe^(2+),33%,30%and 28%for total iron precipitation rate,and 1.58,1.34,and 1.17 g for mass of the collected minerals.X-ray diffraction,Fourier infrared spectroscopy and scanning electron microscopy analyses of the collected minerals show that schwertmannite was the main mineral generated in the reaction systems with Na_(2)HPO_(3)and NaH_(2)PO_(2).In the reaction system with NaH_(2)PO_(4),the main generated mineral was the mixture of jarosite and schwertmannite with jarosite accounted for a large proportion.

关 键 词：酸性矿山废水 嗜酸性氧化亚铁硫杆菌 磷源 生物氧化 次生高铁矿物 

分 类 号：X75[环境科学与工程—环境工程]