农业环境科学学报2011，Vol.30Issue(4)：787-796,10.
贵州省典型城市污水处理厂污泥养分与重金属含量调查
Major Nutrients and Heavy Metals of Municipal Sewage Sludge in Guizhou Province
摘要
Abstract
Sewage sludge samples were collected from eight cities in Guizhou Province in winter and summer and the pH, salinity, content of nutrients and heavy metal concentrations were then determined.Results showed that pH of these municipal sewage sludges ranged from about 6.5～7.4 and the salinity from 0.4％～0.9％.The organic matter, total N and P contents were higher than for common farmyard manure but the K concentration was relatively lower.The total concentrations of Cu, Pb, Ni, Cr, Hg and As were much lower than the states standard for sludges for agricultural purpose;Cd and Zn concentrations together exceeded the standard in only one sample, Cd concentration alone exceeded the standard in another sample, and Zn concentration exceeded the standard in three samples.This Zn exists mainly in a stable chemical form, and the Cd mainly as bioavailable Cd and suggesting a potential environmental Cd risk but the relative safety of the sludge Zn.No significant difference was found between sludge samples collected in winter or summer seasons.Most on the municipal sludges from Guizhou Province were deemed safe for agricultural use with only a few posing any potential risk.关键词
贵州/城市污泥/养分/重金属Key words
Guizhou Province/ municipal sewage sludge/ nutrients/ heavy metals分类
资源环境引用本文复制引用
李瑞,吴龙华,杨俊波,刘鸿雁..贵州省典型城市污水处理厂污泥养分与重金属含量调查[J].农业环境科学学报,2011,30(4):787-796,10.基金项目
中国科学院知识创新工程计划重要方向项目(KSCX2-YWG053) （KSCX2-YWG053）
贵阳市科学技术计划项目(2009筑科农合字3-042) （2009筑科农合字3-042）
