摘要
污泥中重金属的危害是影响污泥土地利用的重要因素;污泥重金属危害不仅取决于总量,其形态分布更能反映重金属的迁移性以及生物有效性。实验以木屑为调节剂,粉煤灰作为钝化剂,研究污泥堆肥前后重金属Cu、Zn与Pb的形态分布变化。结果表明,堆肥对Cu有活化作用,而添加粉煤灰堆肥化能有效抑制这种活化,起到钝化作用,堆肥化使Pb向更稳定形态转化,添加粉煤灰堆肥化对Zn的钝化效果较好,当粉煤灰添加量为35%时,对Cu、Zn、Pb 3种重金属的易迁移态均具明显的钝化效果。
The hazard of heavy metals in sewage sludge is one of the most important factors that influences land use;the hazard of heavy metals not only depends on the amount but also on the speciation,which could react on the migration and the bioavailability of heavy metals.The experiment studied the speciation of heavy metals（Cu,Zn and Pb） after composting of sewage sludge including sawdust as regulator and fly ash as a passive agent.The results showed that composting could make Cu more active but adding fly ash could restrain that effectively;composting could change Pb from unstable speciation to stable speciation;adding fly ash during composting could make Zn more stabilized;when the amount of fly ash was 35% of sewage sludge,composting had an apparent effect of stabilizing on heavy metals（Cu,Zn and Pb） of easy migrate speciation.
出处
《水土保持学报》
CSCD
北大核心
2011年第5期144-146,153,共4页
Journal of Soil and Water Conservation
基金
国家环境保护公益性基金资助项目(200809098)
关键词
污泥
重金属
堆肥化
粉煤灰
形态分布
sewage sludge
heavy metals
aerobic composting
fly ash
distribution of morphology
