摘要
根据重金属不同形态的环境风险引入毒性响应系数,确定污泥堆肥合理施用量。采用污染指数和地积累指数评价杨凌区污泥堆肥受重金属污染程度。初步确定陕西省杨凌区污泥堆肥合理施用量为3.69 t/(hm2.a),该方法突出了重金属形态的重要性,弥补了以往对重金属只进行总量控制的不足。评价结果显示,Cd是限制该地区污泥堆肥施用量的最主要元素。
According to toxic response factor of different forms of heavy metals,rational application rate of sewage sludge compost was determined.Pollution index and geoaccumulation index were used to evaluate contamination degree of sewage sludge compost.Rational application rate of sewage sludge compost in Yangling was 3.69t/（hm2·a）.This method stressed the importance of the forms of heavy metals and made up for the shortage of only controlling the total amount of heavy metals in the past.Results showed Cd was the most important element to restrict application of sewage sludge compost in this area.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2010年第6期98-102,共5页
Transactions of the Chinese Society for Agricultural Machinery
基金
陕西省科技攻关项目(2008K0103)
关键词
污泥
堆肥
施用量
重金属
毒性响应系数
Sewage sludge
Compost
Application rate
Heavy metal
Toxic response factor
