摘要
以我国4种较典型的土壤为对象,采用批量平衡法针对土壤pH、有机质、粘粒质量分数等土壤理化性质对重金属镉吸附的影响进行了研究。研究结果表明,土壤中镉的吸附为快反应,24h内吸附均达到平衡。土壤对镉的吸附随土壤pH及有机质质量分数的增大而增大,决定镉吸附能力的不是粘粒的数量而是其粘粒矿物的组成。因此,针对我国不同地区土壤理化性质的特点可以通过改良其土壤理化性质使镉的吸附增大,减小其在土壤环境中的活性。
The effects of physical and chemical characteristics of soils on the adsorption of Cd were studied in this paper.Four types of soils were test using the batch techniques.The absorption reaction of Cd was in equilibrium within 24 hours for four types of soils.The absorption of Cd increased with increasing pH of soil and the contents of organic matters in soil.It is composition but not the contents of clay mineral of soil which affect the adsorption of Cd in soils.Therefore,it is posssile to control the environmental effect of Cd by altering the physical and chemical characteristics of soils.
出处
《灌溉排水学报》
CSCD
北大核心
2012年第1期19-22,共4页
Journal of Irrigation and Drainage
基金
国家自然科学基金重点项目(51039007)
国家自然科学基金青年科学基金项目(51109166)
关键词
镉
土壤
PH
有机质
粘粒
cadmium
soil
pH
organic matters
clay mineral
