摘要
在脱水污泥施用量分别为0,165,330,495和660 t/hm^2时对美人蕉生长情况的影响进行了研究,同时研究了污泥的施用和美人蕉的种植对土壤中重金属含量的影响.结果表明：当污泥的施用量为660 t/hm^2时,美人蕉无法生长;当污泥的施用量在165-495 t/hm^2时,美人蕉获得了良好的生长响应.污泥的施用使土壤中重金属含量增加,但通过美人蕉的种植,可以降低土壤中的w（Cd）和w（Ni）,以及部分降低w（Zn）,说明美人蕉可以用于污泥的修复研究;污泥的施用还增加了土壤中营养物质的含量,能够改良贫瘠土壤.
The effects of various dewatered sludge loadings （0, 165, 330, 495 and 660 t/hm^2 respectively） in soil on growth of Canna were studied. The effects of sludge applying and Canna planting on heavy metal contents in the soil were also studied. The results showed that the Canna couldn＇t survive with 660 t/hm^2 sludge loading; when the loading was between 165 - 495 t/hm^2 , the Canna growth patterns exhibited a pronounced positive growth response. The sludge application caused increase in heavy metal concentrations in the soil, but after Canna planting, the concentrations of Cd and Ni had decreased significantly, with little decrease in Zn concentration. It can be concluded that Canna can be used for phytoremediation of sludge and sludge can be used to amend lean soil .
出处
《环境科学研究》
EI
CAS
CSCD
北大核心
2008年第2期158-162,共5页
Research of Environmental Sciences
基金
广东省科技计划项目(2005B3303008)
建设部科技计划项目(2004(149))
关键词
脱水污泥
重金属
美人蕉
植物修复
dewatered sludge
heavy metals
Canna
phytoremediation
