黄铁矿对重金属的环境净化属性探讨  

Research on cleaning characteristic of pyrite

作　　者：陈永亨[1] 张平[1] 梁敏华[1] 齐剑英[1] 刘娟[1] 

机构地区：[1]广州大学环境科学与工程学院广州市污染控制与同位素应用技术重点实验室,广东广州510006

出　　处：《广州大学学报（自然科学版）》2007年第4期23-25,共3页Journal of Guangzhou University:Natural Science Edition

基　　金：nsfc-广东联合基金项目(U0633001);国家自然科学基金项目(20477007);广州市科技项目(2004J1-C0331);广州市属高校科技计划项目(62013)

摘　　要：重金属在黄铁矿表面存在一种"溶解-吸附沉淀"平衡,这一平衡由黄铁矿表面氧化和碳酸盐中和作用共同决定,若碳酸盐过量,则重金属的"溶解"小于"吸附沉淀",表现出黄铁矿的环境净化属性,并且是黄铁矿处理重金属废水的理论基础.黄铁矿处理典型重金属离子Pb2+、Hg2+、Cd2+、Cr(VI)、Cu2+及Tl+的去除率达96%～99%,表现出的处理效果良好,并且处理后溶液的pH值自然升至中性,表明黄铁矿中的碳酸盐是一种天然的净化调节剂.The behavior of heavy metals on the surface of pyrite is under the control of the dissolution-adsorption precipitation equilibrium that is dependent on both the neutralization reaction of carbonate and surface oxidation of pyrite. The cleaning characteristic of pyrite is exhibited when the carbonate is excessive and the ＂dissolution＂ of heavy metal is less than ＂adsorption precipitation＂, which is the theoretical foundation of pyrite as treatment material for heavy metal wastewater. Furthermore, the removal experiments of typical heavy metals such as Pb^2＋ ,Hg^2＋ ,Cd^2＋ ,Cr（Ⅵ）,Cu^2＋ and Tl^＋ using pyrite material show good results and the pH value of aftertreatment solution naturally increases to neutralized level. All of these indicate that the carbonate in pyrite is one of the natural adjusting agents of decontaminating.

关 键 词：黄铁矿 净化属性 衰减全反射红外光谱 重金属 

分 类 号：X131[环境科学与工程—环境科学]