摘要
随着经济的快速发展,土壤中重金属污染风险越来越受到人们的重视。矿山周边农田土壤更容易受到污染,因此,准确评价土壤中重金属的污染状况有重要的意义。对渭南市矿山企业周边农田土壤进行科学布点,采集具有代表性的北方农田土壤样品90个,研究样品中4种重金属(铅、镉、汞、砷)的污染状况。综合考虑污染物的种类、丰度、生物吸收效应等因素,对方法毒性响应系数进行校正,得到校正后潜在生态危害指数评价体系:ARI<130,130≤ARI<260,260≤ARI<520,ARI≥520分别代表校正后轻微、中等、强、很强潜在生态危害等级。用校正后潜在生态危害指数法评价土壤中4种重金属的污染等级占比,发现与地积累指数法的评价结果较吻合,评价结果准确。校正后的评价方法可为北方农田土壤的重金属污染评价提供更加科学的依据。
With the rapid economic growth,public concern over heavy metal pollution in soil has been rising.Farmland soil near mines is particularly vulnerable to contamination.Hence,accurately evaluating the status of heavy metal pollution in soil holds great importance.Scientific soil sampling was conducted around mining enterprises in Weinan city,and 90 representative soil samples were collected from the northern farmland to investigate the pollution levels of four heavy metals(Pb,Cd,Hg,and As).Considering factors such as pollutant type,abundance,and bioabsorption,the toxicity response coefficient of the assessment method was calibrated.This led to the establishment of a calibrated potential ecological hazard index evaluation system,defined as follows:ARI<130(slight hazard),130≤ARI<260(moderate hazard),260≤ARI<520(strong hazard),and ARI≥520(very strong hazard).Using the calibrated potential ecological hazard index method,the pollution levels of the four heavy metals in soil were evaluated and found to align with the results from the soil accumulation index method.This consistency confirms the accuracy of the evaluation outcomes.The calibrated assessment method provides a more scientific basis for evaluating heavy metal pollution in northern farmland soils.
作者
郭晋君
王斐
范智超
刘敏
张淳
宋蓓
赵蓓
GUO Jinjun;WANG Fei;FAN Zhichao;LIU Min;ZHANG Chun;SONG Bei;ZHAO Bei(Shaanxi Environmental Monitoring Center,Xi'an,Shaanxi 710054,China)
出处
《中国无机分析化学》
北大核心
2025年第9期1341-1350,共10页
Chinese Journal of Inorganic Analytical Chemistry
基金
陕西省重点研发计划项目(2023-YBSF-439)
陕西省环境介质痕量污染物监测预警重点实验室开放基金资助项目(SHJKFJJ202311)。
关键词
土壤
重金属
潜在生态危害指数
soil
heavy metal
potential ecological risk index
