硫氧化细菌对锑矿尾矿重金属浸出研究  

Leaching of Heavy Metal in Antimony Mine Tailings by Sulfur-oxidizing Bacteria

作　　者：张青青[1] 杨爱江[1,2] 姚维[1] 罗珊[1] 

机构地区：[1]贵州大学资源与环境工程学院 [2]贵州大学环境工程规划设计研究所,贵州贵阳550025

出　　处：《环境科学与技术》2014年第5期26-30,35,共6页Environmental Science & Technology

基　　金：贵州省特色重点建设学科项目;贵州省科技厅"贵州省矿山环境重金属污染防治科技创新人才团队"建设项目(黔科合人才团队[2012]4005号);贵州省自然科学基金:喀斯特地区矿山典型固废有毒污染物的化学特征及生态毒理效应研究(黔科合J字[2009]2034)

摘　　要：为研究硫氧化细菌对硫化锑矿尾矿中重金属污染释放的影响,从贵州某锑矿的酸性矿井废水中分离出硫氧化细菌,分离纯化后对其生长特性进行初步研究,以温度、pH、与矿浆浓度为3种因素,每种因素选择3种不同水平进行正交试验设计,探讨不同条件下硫氧化细菌的浸矿影响。结果表明,随着时间变化,硫氧化细菌不断生长,各实验组溶液pH呈下降趋势、EC(电导率)呈上升趋势、目标重金属离子浓度呈上升趋势,且在pH=3、t=25℃、矿浆浓度c=20%时浸出量达到最大。表明硫氧化细菌的存在促进了锑矿尾矿中重金属的溶出,在自然堆存条件下会加剧矿区的环境污染,应加以及时有效控制。In order to study the effect of antimony sulfide ore tailings release of heavy metal pollution by sulfur-oxidizing bacteria which was isolated from acid mine drainage antimony mine in Guizhou, its separation, purification and growth characteristics were studied, and factors such as temperature, pH and pulp density were analyzed, and the orthogonal experiment was done to explore the effects of different conditions of leaching. Results showed that with the continuous growth of sulfur-oxidizing bacteria, pH of the solution in each experimental group showed a downward trend, EC upward trend, target heavy metal ion concentration is rising with the time, and the maximum amount of leaching is obtained at pH 3, temperature 25 ℃and pulp density 20%, which indicated that the presence of sulfur-oxidizing bacteria would promote antimony ore leaching of heavy metals, and stock piling under natural conditions would exacerbate environmental pollution in the mine, thus should be timely and effective controlled.

关 键 词：锑矿 硫氧化细菌 正交试验 

分 类 号：X753[环境科学与工程—环境工程]