云南化工Issue(6)：15-18,4.DOI:12.3969/j.issn.1004-275X.2014.06.004
硫化砷渣中砷浸出特性研究＊
Research of Leaching Characteristics of Arsenic in Arsenic Sulfide Residue under Different pH and Ca/As Ratio Conditions
摘要
Abstract
Through the horizontal oscillation toxicity characteristic leaching experiment,leaching of arsenic in arsenic sulfide residue under different liquid pH and Ca/As ratio (molar ratio )conditions was studied.The experimental results showed that different pH and Ca/As ratio of the leaching liquid have great influence on As leaching concentration.When pH of the solution was in the 1.01 to 13.12 range,with the increase of pH value of leaching solution,the concentration of As in the leaching solution firstly decreased and then increased.When pH was equal to 1 1 .9 1 ,the concentration of arsenic reached the minimum value of 4.27g/L. When the Ca/As ratio increased,the leaching concentrations of As increased firstly and then decreased. When Ca/As was equal to 1.405,the concentration of arsenic had maximum value of 31.674g/L. Overall,when the Ca/As ratio was in the 0.187 to 5.619 range,by adding CaO,macroeconomic perform-ance is to promote As dissolution from arsenic sulfide residue.关键词
硫化砷渣/砷/浸出Key words
sulfur arsenic residue/arsenic leaching分类
化学化工引用本文复制引用
张洪,黄宗凯,何政兵..硫化砷渣中砷浸出特性研究＊[J].云南化工,2014,(6):15-18,4.
