硫化物矿物溶解度与溶液pH值的关系  

RELATIONSHIP BETWEEN SOLUBILITY OF SULFIDES AND SOLUTION pH VALUE

作　　者：贾建业[1] 兰斌明[2] 谢先德[1] 吴大清[1] 汤艳杰[1] 王燕 王建成 

机构地区：[1]中国科学院广州地球化学研究所,广东广州510640 [2]长安大学,陕西西安710054 [3]广东有色金属地勘局勘查研究院,广东广州510000 [4]辉县市地矿局,河南辉县453600

出　　处：《长春科技大学学报》2001年第3期241-246,共6页Journal of Changchun University of Science and Technology

基　　金：国家自然科学基金资助项目 (4 9872 0 17);中国科学院王宽诚博士后奖励基金项目;广东省博士后科学基金资助项目

摘　　要：硫化物作为自然界常见的一大类矿物 ,由于溶解度很小 ,硫化物对水pH值的影响以及水对它的溶解度影响往往被人们所忽视。通过计算常见硫化物矿物的自由能ΔG0f、溶度积Ksp和溶解度S、绘制logS—pH曲线 ,得出硫化物矿物在不同 pH值条件下的溶解规律 ,水溶液的pH值受硫化物矿物的控制 ;反过来 ,水溶液的pH值也影响着矿物溶解度的大小。此外 ,对硫化物矿物饱和溶液的缓冲范围。As a kind of common mineral, the affect of sulfide solubility on pH value of water solution each other is often neglected because their solution is very small. Therefor, on the basis of numeration of the free potential ΔG 0 f, the authors calculated the solubility product( K sp ) and the solubility( S ) of common sulfides, drew the curves of relationship between log S and pH value, and got some conclusion that the solution pH value was controlled by sulfides solubility, and vice versa, the pH value could affect sulfides solubility. Furthermore, the buffer capacity and range of sulfide saturation solution were calculated. And the reciprocity mechanism of sulfides and solution pH value was discussed.

关 键 词：硫化物 溶解度 PH值 缓冲容量 缓冲范围 作用机理 自由能 

分 类 号：P578.2[天文地球—矿物学]