农业环境科学学报2011，Vol.30Issue(3)：461-467,7.
有机质对红壤和黑土中外源铅镉稳定化过程的影响
Effects of Organic Matter on the Stabilization Process of Added Cadmium and Lead in Red Soil and Black Soil
摘要
Abstract
The stabilization processes of cadmium(Cd ) and lead(Pb) in single and combined metal-contaminated red soil and black soil of China were studied.Effects of content of soil organic matter on the stabilization process of added cadmium and lead were also studied.After 500 mg·kg-1 Pb, 1.0 mg·kg-1 Cd or 500 mg·kg-1 Pb+l.0 mg·kg-1 Cd were added in soil, soil available Pb or Cd were decreased rapidly during the first 15 days, then decreased slowly, and stabilized after 30 day's incubation.In the combined metal-contaminated soils, existing of Pb increased the concentration of soil available Cd whereas the Cd had no significant effect on the available Pb.The red soil needed more time to reach equilibrium, but had higher equilibrium concentrations of Pb and Cd than the black soil.The soeond-order equation was used to simulate the stabilization process of Cd or Pb.The equilibrium concentrations of Cd in red soil and black soil were 12.7％～37.3％ lower in the soil samples with high organic matter relative to the soil samples with low organic matter, whereas the equilibrium concentrations of Pb in red soil and black soil were 78.3％～96.2％ lower.Statistic analysis suggested that high content of soil organic matter retarded the availability of Cd and Pb significantly( P＜0.05 ).Thus, increasing of organic matter in red soil or black soil was an effective way to decrease the availability of Cd and Pb and reduce the risk of environmental pollution in agricultural production.关键词
镉/铅/有机质/复合污染/有效性Key words
cadmium/ lead/ organic matter/ combined pollution/ availability分类
资源环境引用本文复制引用
吴曼,徐明岗,徐绍辉,刘军领,武海雯,沈浦..有机质对红壤和黑土中外源铅镉稳定化过程的影响[J].农业环境科学学报,2011,30(3):461-467,7.基金项目
国家"十一五"重点科技支撑计划项目(2008BADA7B03,2006BAD05B09) （2008BADA7B03,2006BAD05B09）
国家基础性工作专项(2007FY220400) （2007FY220400）
国家"973"计划项目 (2011CB100501) （2011CB100501）
国家公益性行业专项(200910201) （200910201）
