摘要
采用模拟酸雨手段 ,突出有机酸对 As元素的淋出作用。分别配置 p H=4.47的硝酸、乙酸及硝酸与乙酸的混酸三种淋滤液 ,对重庆电厂炉前煤及飞灰中的 As元素进行 40 h的淋滤实验 ,以探讨有机酸淋滤条件下 As元素的淋出行为。结果表明 :有机酸淋滤液对炉前煤及飞灰中的 As元素具有较强的淋出作用 ,有机酸中 H+的缓冲释放作用是导致 As元素较强淋出率的主要因素。
This paper mainly discussed the leaching characteristics of As in coal and fly ash of Chongqing Power Plant through the leaching experiments by using the simulated acid rain.HNO 3,CH 3COOH and mixed acid (with pH value 4.47)leaching solutions were provided to carry out the 40h leaching experiments.The results showed that large amounts of As were leached from coal and fly ash under organic acid leaching solutions,and H + buffering of organic acid played an important role on As releasing.
出处
《重庆环境科学》
2000年第4期29-32,共4页
Chongqing Environmental Science
基金
国家重点基础研究专项经费资助! ( G1 9990 2 2 2 )
