摘要
为了了解因灌溉猪场废水引起重金属积累的潜在生态风险影响,采集了河北省京安猪场区域农田清灌区和灌溉8年猪场废水污灌区的耕层(0～20cm)共52个土壤样品,并测定了样品中Zn、Cu、Cd、Cr、Pb和As含量。根据背景资料和主成分分析判断重金属污染来源,并应用地积累指数和Hakanson潜在生态风险评价指数进行重金属污染及潜在生态风险评价分析。结果表明,研究区Zn、Cu和As的污染源主要为猪场废水,Pb污染源主要为化肥,而Cd和Cr主要来源于土壤母质,研究区农田土壤重金属为轻微或中等程度污染,潜在生态风险指数RI为低值。
Soil samples were collected in the plough horizon of swine wastewater irrigation farmland and groundwater irrigation farmland respectively for assessment of heavy metals including Zn, Cu, Cd, Cr, Pb and As pollution and the potential ecological risk of a long-term wastewater irrigation area. The study shows that As, Cu and Zn result from swine wastewater irrigation while pollution of Pb primarily attributes to application of fertilizers.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2008年第9期132-137,共6页
Environmental Science & Technology
基金
农业部环保所基本科研业务费专项资助项目(2007-hzp-10)
国家高技术研究发展专项“863”经费资助(2006AA10Z242)
关键词
猪场废水
污水灌溉
农田土壤
重金属
污染
潜在生态风险评价
swine wastewater
sewage irrigation
farmland soil
heavy metals
pollution
potential ecological risk assessment
