摘要
土壤环境容量是对污染物进行总量控制与环境管理的重要依据,在生产实际中具有重要意义。本文在阐述利用土柱淋滤试验研究土壤环境容量的机理和模型的基础上,对黄土类土的耕层、犁底层、粘化层和钙积层进行土柱淋滤试验,对试验结果进行拟合,通过建立方程求解,从而确定土壤环境容量。方法简单,环境因子易控制。从试验得出,黄土类土中粘化层铬、砷的环境容量最大,分别为88.2mg/kg和6.65mg/kg,各土层铬、砷的平均环境容量分别为42.6mg/kg和5.62mg/kg,该结果为干旱半干旱区合理利用污水资源,充分利用黄土的净化能力提供依据。
Soil environment capacity is an important basis for total amount control of pollutants and environment management, so researches of environment capacity have important meanings in the production. At the basis of comprehensive studies about mechanism and model of environment capacity in soil , the soil column leaching experiments are conducted to different layers of loessial soil including cultivated horizon, plow pan, argillic horizon and calcic horizon. The environment capacities are determined by simulating experiment results. Above mentioned method is simple, and environment factors are easily controlled. The results are showed that environment capacities of Cr（Ⅵ） and As in argillic horizon are the biggest, which are 88.2mg/kg and 6.65mg/kg respectively. Average environment capacities of Cr（Ⅵ） and As in loessial soil are 42.6mg/kg and 5.62mg/kg respectively. The results lay the foundations of fully utilizing sewage and purification ability of loessial soil in arid and semi--arid areas.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2005年第6期137-141,共5页
Journal of Arid Land Resources and Environment
基金
国家科技攻关计划项目(2002BA901A43)
国家自然科学基金项目(40372114)
长安大学科技发展基金项目(04Z08)
关键词
黄土类土
铬
砷
土柱淋滤试验
环境容量
loessial soil
chromium（Ⅵ） and arsenic； soil column leaching experiment；environment capacity
