【作者】 曾敏； 廖柏寒； 张永；

【Author】 Zeng Min~1,Liao Bo-han~(2*),Zhang Yong~3 (1.College of Resources and Environment,Central South University of Forestry and Technology,Changsha 410004;2.International College,Central South University of Forestry and Technology,Changsha 410004;3. College of Resources and Environment,Hunan Agriculture University,Changsha 410128)

【机构】 中南林业科技大学资源与环境学院； 中南林业科技大学国际学院； 湖南农业大学资源环境学院；

【摘要】 通过As污染土壤的实验室浸泡试验,研究了几种酸和盐对As污染土壤的化学萃取修复的效果和机理,同时从土壤pH的改变和土壤组分的溶出2个方面研究了酸和盐对土壤的负面影响。研究结果表明,4种酸中H₃PO₄是萃取效果最好的酸液;2种盐溶液中,KH₂PO₄对土壤As的去除效果较好。但在去除As的同时,萃取剂也改变土壤的pH值,造成土壤组分的溶出,对土壤造成不利的影响,酸的影响更大。相对而言,KH₂PO₄是一种有效而且对环境友好的萃取剂。更多还原

【Abstract】 Laboratory batch experiment were conducted to study effects and mechanism of As extraction from contaminated soils by using of acid and salt solutions,and study damage to soil resulting from acid and salt solutions through analyzing of change of soil pH and dissolution of soil composition.The results showed,in these acid solutions and salt solutions,phosphoric acid and potassium dihydrogen phosphate proved to be most effective in extracting As and was more effective in 2 salt solution.In addition,decrease in soil pH and dissolution of soil components were resulted from using of these extractants,especially acid solution.Among these extractants,KH₂PO₄ proved to be not only effective in removing As from soil but also environment-friendly.更多还原