摘要
研究了大冶市几种类型土壤的基本性质及与Cu2+吸附的关系,结果表明,土壤对Cu2+的吸附量随其CEC值(记为CEC)而变化,供试土壤的Cu2+吸附量由大到小的顺序为石灰土→水稻土→潮土→棕红壤。加入铜浓度为5mmol·L-1时11个土壤对铜的吸附量x(μmol·g-1)与CEC的直线相关方程为x(Cu2+)=2.018×CEC+24.4(r=0.7066)。而影响CEC的因素,如pH、粘粒含量及其组成、有机质、比表面等,也是决定Cu2+吸附量的重要因素。
s: The eleven soils collected from Daye city were used to investigate the relationship of the physiochemical properties and Cu2+adsorption. Results indicated that copper adsorption amount decreased with the order of calcareous soil > paddy soil > chao soil > brown red soil. The adsorption amount of Cu2+was corresponding to the cation change capacity (CEC) of soils. At 5 mmol·L-1 addition concentration, the amount of Cu2+ adsorption (x) of soils and CEC were observed a positive straight line correlation as following equation: x = 2.018×CEC + 24.4 (r =0.7066)。Other physiochemical characteristics which affect CEC, such as pH, clay content and composition, organic matter, specific surface area, were factors controlling Cu2+adsorption.
出处
《生态环境》
CSCD
2004年第4期544-545,548,共3页
Ecology and Environmnet
基金
湖北省教育厅教学改革资助项目
关键词
大冶土壤
表面性质
Cu吸附
cation change capacity
copper adsorption
soils
Daye city
