摘要
为了给土壤重金属污染提供定量依据,该文在缓变型地球化学灾害基本模型的基础上,基于土壤中Zn元素含量实测数据,分别研究了合肥大兴镇地区和义城镇地区土壤中Zn元素的缓变型地球化学灾害特征并进行了对比,确定其数学模型。研究结果显示,大兴镇地区土壤中Zn元素有从可释放态向有效态(TRCPZn→ZnE+C)释放转化的趋势,其缓变型地球化学灾害临界值为70.333 mg∕kg,约22.6%面积的土壤具有爆发Zn元素缓变型地球化学灾害的可能性。而义城镇地区土壤中Zn元素还不具有爆发缓变型地球化学灾害的可能性。
To provide the mensurable evidence for early-warning of soil heavy metal pollution, base on the mathematical model of delayed geochemical hazard （DGH） and according to experimental data of Zn element in soil, the DGH characteristics of Zn element in soil of Daxing town and Yicheng town in Hefei area were studied and contrasted, then the model of Zn element was determined. The results show that in Daxing town the Zn element in soil has the inverting trend form total releasable state to exchangeable and carbonate state, the critical concentration of Zn element in soil was 70.333mg/kg, DGH of Zn element has the possibility to break out in about 22.6% soil area. In Yicheng town, DGH has no possibility to break out.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2008年第5期42-45,共4页
Transactions of the Chinese Society of Agricultural Engineering
基金
安徽省优秀青年科技基金项目
中国地质调查局项目资助
