摘要
以猪粪为研究对象,采用高温好氧模拟堆腐试验,研究外源添加剂沸石对猪粪腐解过程中重金属含量的动态变化规律。结果表明:高温堆肥处理后,猪粪中重金属Cu、Zn离子含量普遍升高,表现出明显的"相对浓缩效应";堆肥处理可在一定程度上降低猪粪中重金属Cu、Zn的生物有效性,使其形态向有效性低的方向转化;外源添加沸石明显降低了猪粪中DTPA-Cu和DTPA-Zn的含量,对堆肥可交换态重金属Cu和Zn的钝化效果分别为68.03%和46.13%。
This paper studied the heavy metals content change of pig manure by supplying zeolte with high temperature aerobic composting.The results showed that of pig manure composting,concentrations of Zn and Cu increased.Composting obviously stimulated transformation of Zn and Cu into forms low in activity,thus decreasing bioavailability of the heavy metals.Zeolite was effective in reducing bioavailability of Zn and Cu.The passivation effectiveness of zeolte on exchangeable heavy mentals（Cu and Zn）was 68.03% and 46.13%,respectively.Zeolite can be used to treat pig manure in composting to reduce the risk of heavy metal pollution of using pig manure in farmland.
出处
《北方园艺》
CAS
北大核心
2010年第24期41-43,共3页
Northern Horticulture
关键词
猪粪
沸石
重金属
pig manure
zeolite
heavy metals
