摘要
以广州市16座城市污水处理厂污泥为研究对象,分析其泥质特征,并对重金属潜在风险开展评价。结果表明,污泥样品pH值范围为6.19~11.70;含水率、粒径、有机质及多环芳烃含量均满足农用要求;矿物油含量超标;8种重金属含量均值从高到低排序为Zn>Cu>Cr>Pb>Ni>As>Cd>Hg,不同重金属形态分布差异明显。8种重金属内梅罗综合污染指数为1.14,综合潜在生态危害指数为82.4,对成人非致癌和致癌综合危害指数分别为0.101和4.57×10^(-5),在可接受范围之内。
Based on municipal sludge from 16 sewage treatment plants of Guangzhou,the physicochemical properties of sludge,potential ecological risks and health risks of heavy metals were analysed.The results showed that pH values ranged from 6.19 to 11.70.The moisture content,particle size and concentrations of organic matter and polycyclic aromatic hydrocarbon met agricultural requirements.The mineral oil exceeded the standard.The mean content of 8 heavy metals ranked as Zn>Cu>Cr>Pb>Ni>As>Cd>Hg.The distribution proportions of heavy metals were different.The Nemero comprehensive index of heavy metals was 1.14 and Hakanson ecological hazard index was 82.4.The non-carcinogenic and carcinogenic indexes of adults were 0.101 and 4.57×10^(-5),namely within the acceptable level.
作者
陈灿
饶思威
欧阳培毓
曹俊
CHEN Can;RAO Si-wei;OUYANG Pei-yu;CAO Jun(Guangdong Provincial Academy of Environment Science,Guangzhou 510045,China)
出处
《环境科技》
2023年第2期46-52,共7页
Environmental Science and Technology
基金
广东省环保专项资金项目(粤财资环[2022]18号)
中国工程院战略研究与咨询项目(2022-GD-6)。
关键词
城市污泥
重金属
生态风险
健康风险
频数分布
Municipal sludge
Heavy metals
Ecological risk
Health risk
Frequency distribution
