摘要
鄱阳湖生态经济区是我国南部市场经济最活跃区域之一,为了解该区域城市污水处理厂污泥重金属的来源及污染情况,为污泥处理和资源化开发再利用提供科学依据,收集环鄱阳湖生态经济区主要城市污水处理厂脱水污泥,得到污泥中8种主要重金属含量,并分析重金属污染特征、来源和风险评价。结果表明:①研究区域污泥重金属含量高低依次为Zn、Cu、Pb、Cr、Ni、As、Cd和Hg,其中Cu、Zn、Pb、Cd和Cr变异程度较高,属于强变异。②主成分分析结果显示,研究区域污泥中重金属主要来源有2个,其中Cu、Zn、Pb、Cd、Cr和As来源主要为生活清洁和工业部门,Ni和Hg来源主要为电镀化工行业和医疗。③内梅罗综合污染指数为1.615,污泥重金属为轻度污染。④Cd元素地累积指数平均值最高,污染达强-极强污染级别。⑤Cd、Hg生态风险为严重风险,且Cd元素对研究区域生态风险影响最大,研究区域综合生态风险指数为467.43,区域潜在生态风险程度属于重风险。研究显示,鄱阳湖生态经济区污水处理厂脱水污泥中重金属污染程度中等,但Cd元素潜在生态风险值得关注。
The Poyang Lake Ecological Economic Zone is one of the most active areas of the market economies in southern China.In order to understand the source and pollution of heavy metals in the sludge of urban sewage treatment plants in this region,and to provide scientific basis for sludge treatment and resource utilization,the dewatered sludge from the main urban sewage treatment plants around Poyang Lake Ecological Economic Zone was collected.The content of 8 main heavy metals in the sludge was analyzed,and the characteristics,sources and risk assessment of heavy metal pollution were analyzed.The results showed that:①The heavy metal content of sludge in the study area was in the order of Zn,Cu,Pb,Cr,Ni,As,Cd and Hg.The variation degree of Cu,Zn,Pb,Cd and Cr was high,belonging to strong variation.②The results of principal component analysis showed that there were two main sources of heavy metals in the sludge in the study area,among which Cu,Zn,Pb,Cd,Cr and As were mainly from domestic cleaning and industrial sectors,while Ni and Hg were mainly from electroplating chemical industry and medical treatment.③The Nemerow comprehensive pollution index was 1.615,indicating light pollution of heavy metals in the selected sludge.④The average value of Cd element accumulation index was the highest,indicating severe to extremely severe pollution.⑤Cd and Hg posed serious ecological risks,and the Cd elements had the greatest impact on the ecological risks of the study area.The comprehensive ecological risk index of the study area was 467.43,and the potential ecological risk of the region was serious risk.The research showed that the pollution degree of heavy metals in dewatered sludge of sewage treatment plant in Poyang Lake Ecological Economic Zone was medium,but the potential ecological risk of Cd element deserved attention.
作者
余丹丹
彭希珑
陈春丽
何宗健
龚娴
陈彬
罗一茗
曾艳
YU Dandan;PENG Xilong;CHEN Chunli;HE Zongjian;GONG Xian;CHEN Bin;LUO Yiming;ZENG Yan(Key Laboratory of Poyang Lake Environment and Resource Utilization of MOE,Nanchang University,Nanchang 330031,China;School of Resources&Environment,Nanchang University,Nanchang 330031,China;Nanchang Environmental Monitoring Station,Jiangxi Province,Nanchang 330031,China;Nanchang Hangda Energy Conservation&Environmental Protection Service Co.,Ltd.,Nanchang 330031,China)
出处
《南昌大学学报（理科版）》
CAS
北大核心
2023年第6期588-594,共7页
Journal of Nanchang University(Natural Science)
基金
国家自然科学基金资助项目(51568048)。
关键词
重金属
污泥
主成分分析
内梅罗综合污染指数
地累积指数
生态风险
heavy metals
sludge
principal component analysis
Nemerow comprehensive pollution index
geo-accumulation index
ecological risk
