酸性降水对土壤中溶出汞的流通量及状态分布影响的初步研究  

AN PRELIMINARY STUDY ON EFFECTS OF ACID PRECIPITAION ON CIRCULATION OF MERCURY DISSOLVED OUT AND ITS STATUS DISTRIBUTION IN SOIL

作　　者：史润选 刘晓光 熊际翎 余国泰[2] 赵殿五[2] 

机构地区：[1]贵州省环境保护科学研究所 [2]中国科学院生态环境研究中心

出　　处：《贵州师范大学学报（自然科学版）》1998年第1期85-90,共6页Journal of Guizhou Normal University：Natural Sciences

摘　　要：酸性降水及地表水对贵州主要土类———黄壤进行了溶出汞的实验。结果表明：自然土总汞的溶出及流通规律是表层土壤大于深层土壤，随溶液酸度增高，溶出流通增大；有机汞规律相似；耕作土规律相反，中性偏碱溶液总汞的溶出流通反而高；土壤对总汞的吸附率均在９０％以上；溶液的离子强度对总汞的溶出及流通有较大影响。An immersion experiment,with using acid precipitation and surface water to dissolve out mercury in yellow soil major soil group in Guizhou province is carried out,The results show that with different acidities of precipitation.more total mercury dissolved out and bigger circulation can be obtained in surface layer of natural soil than that in deep layer and the circulation of mercury dissolved out will be increased with the increase of acidity in solution.The organometcury in soil also observes the similar tendency However an opposite law is shown in cultic ated soil more total mercury dissolved out and bigger circulation are found in neutral alkaline solution.The total mercury adsorption rates in soils are all above 90% and have close relation with the ironic strength of solution.

关 键 词：酸性降水 土壤 汞 流通量 状态分布 土壤污染 

分 类 号：X53[环境科学与工程—环境工程]