生物有机肥对重金属的吸附解吸作用的影响  

Adsorption and Desorption of Heavy Metal Ions by Organic Fertilizers

作　　者：刘秀春[1] 高艳敏[1] 范业宏[1] 王宝申[1] 

机构地区：[1]辽宁省果树科学研究所,辽宁熊岳115009

出　　处：《土壤通报》2008年第4期942-945,共4页Chinese Journal of Soil Science

基　　金：国家科技部成果转化项目(20070020-333)资助;省重点科技攻关项目子专题(2006215003)资助

摘　　要：通过室内培养的方法比较了生物有机肥和干鸡粪对重金属离子Pb2+、Cd2+、Cr3+、As6+的吸附与解吸特性。研究结果表明:生物有机肥和鸡粪对4种重金属离子的吸附量大小依次为Cr3+>Pb2+>Cd2+>As6+,解吸量大小顺序为Pb2+>Cd2+>Cr3+>As6+,而解吸率的大小顺序为As6+>Pb2+>Cd2+>Cr3+,这主要与四种金属离子的电荷种类、数量及水合离子半径等密切相关。与干鸡粪相比,生物有机肥增加了对4种重金属离子的吸附率,同时降低了对4种重金属离子的解吸率。Influence of organic fertilizer on the adsorption and desorption of pb^2＋,Cd^2＋,Cr^3＋ and As^6＋ was studied. Results showed that the maximum adsorption amounts of the four heavy metal ions increased in the order of Cr^3＋ 〉 Pb^2＋〉Cd^2＋〉As^6＋ on both organic fertilizer and dry chicken manure, the desorption amounts were Pb^2＋〉Cd^2＋〉Cr^3＋〉 As^6＋and whereas desorption ratio was in the order of As^6＋〉Pb^2＋〉Cd^2＋〉Cr^3＋. Compared with dry chicken manure,the organic fertilizer not only enhanced the adsorption capacity of Pb^2＋,Cd^2＋,Cr^3＋ and As^6＋, but also reduced the relevant desorption ratio.

关 键 词：生物有机肥 重金属离子 吸附 解吸 

分 类 号：S153[农业科学—土壤学]