摘要
利用土柱淋溶实验研究Cr(VI)和As(V)在不同类型土壤中的垂向迁移特征。结果表明,Cr(VI)和As(V)在含砂砾和砾石的河流冲积物中迁移速度最大,而在粘粒含量较高的黄土中迁移速度最小。土壤砂粒含量和pH值越高,Cr(VI)和As(V)的迁移速度越大。粉粒、粘粒、铁氧化物和锰氧化物含量越高,越不利于Cr(VI)和As(V)的迁移,说明以上因素对于Cr(VI)和As(V)在土壤中的吸附具有很大的贡献。总有机碳(Total Organic Carban,TOC)的含量升高不利于Cr(VI)和As(V)的迁移,但是影响不大。
The vertical transport of Cr（VI） and As（V） in different types of soils was investigated by using soil column leaching tests.The results showed that the transport speed of Cr（VI） and As（V） in the soil I containing higher sand and gravel was greatest,and the transport speed in soil V containing higher clay content was least.The higher sand content and pH value,the greater was transport speed of Cr（VI） and As（V）.Higher contents of silt,clay,iron oxide and manganese oxide,more disadvantageous was caused for the transportation of Cr（VI） and As（V）.It was indicated that the above factors contributed highly to the adsorption of Cr（VI） and As（V） in the soils.The increase of total organic carbon（TOC） content was unfavorable to Cr（VI） and As（V） transport,but its impact was limited.
出处
《土壤通报》
CAS
CSCD
北大核心
2010年第5期1203-1206,共4页
Chinese Journal of Soil Science
基金
国家重点基础研究发展计划973项目(2004CB418505)资助
