模拟淹水条件下三峡库区消落带土壤重金属形态变化  

Changes of soil heavy metal forms of Three-Gorges Reservoir water-level fluctuation zone under the flooding simulation

作　　者：郭沛[1] 朱强[1] 王素梅[1] 胡红青[1] 胡莲[2] 万成炎[2] 张志永[2] 

机构地区：[1]华中农业大学资源与环境学院,武汉430070 [2]中国科学院水工程生态研究所,武汉430079

出　　处：《华中农业大学学报》2013年第6期70-74,共5页Journal of Huazhong Agricultural University

基　　金：国家水体污染控制与治理科技重大专项(2009ZX07104-003)

摘　　要：采集三峡库区小江流域消落带土样,通过室内模拟试验和化学分析,考察土壤理化性质和消落带土壤淹水前后重金属（Fe、Mn、Cu、Zn）形态变化。结果表明：淹水导致Fe2＋、Mn2＋、有效铜等重金属含量增加,平均含量分别从58.88、35.26、0.96mg/kg增加到1 383.8、782.7、1.73mg/kg;淹水15d后,部分样品有效锌含量增加10.15%~12.18%,部分样品有效锌含量减少3.69%~7.12%;淹水30d后,有效锌的含量增加10.9%~46.6%。土壤基本理化性质对土壤重金属含量也有影响。Soil samples on Xiaojiang watershed water-level fluctuation zone in the Three Gorges Reservoir Area were collected for the study. By simulation incubation and chemical analysis, the basic physical-chemical properties of soils and the changing forms of heavy metals （Fe2＋ , Mn2＋ , available Cu and Zn） were examined in continuous anoxic conditions. The results showed that flooding increased the contents of the Fe2＋ , Mnz＋ , available Cu. The contents increased on average from 58. 88,35.26,0. 96 mg/kg to 1 383.8,782. 7,1.73 mg/kg,respectively. After 15 days＇ flooding,the contents of available Zn in both Gaoyang and Yanglu increased at the rates of 12. 18% and 10. 15%, but the other forms de- creased at the rates of 7. 12 % and 3. 69 %. After 30 days＇ flooding, the contents of available Zn increased with the increment rate ranging from 10. 9% to 46.6%. The changing form of heavy metals were influ- enced by the basic physical and chemical properties of soils.

关 键 词：消落带 土壤重金属 含量 淹水培养 三峡库区 

分 类 号：X524[环境科学与工程—环境工程] X131.2