某农药厂场地土壤污染调查与生态健康风险研究

Site Soil Contamination Investigation and Ecological Health Risk Assessment for A Pesticide Factory

针对某农药厂土壤污染及其生态健康风险问题,通过现场实地调查并采集水样、土样送检,用便携式光离子化检测器(PID)和X射线荧光光谱仪现场进行检测以及实验室GC-MS分析,确定了主要污染物含量及其分布,应用潜在生态危害系数法和毒性风险评估法对检出的高浓度污染物进行生态健康风险评估。结果表明,该污染场地主要的污染物为2,4-二氯苯酚、铬和苯并(b)荧蒽;厂区内土壤的重金属含量比厂房外高,厂区内大部分调查样点都属于强生态危害级别,厂区外调查样点基本上属于中等生态危害级别;2,4-二氯苯酚、铬和苯并(b)荧蒽的非致癌风险都低于可接受风险控制值。

The pesticide factory site soil pollution would arouse ecological health risk problems, in this study, water and soil samples were collected from the pesticide factory site. The main pollutant content and distribution were determined by a portable photoionization detector （PID）, GC-MS and X ray fluorescence spectrometer. The potential ecological hazard toxicity risk coefficient method and ecological risk method were used to evaluate ecological health risk of high concentration pollutant detected. The results showed that the main pollutants in contaminated sites were 2,4-two chlorophenols, chromium and benzo （b） and fluoranthene; the concentrations of heavy metals within the plant were higher than that outside soil. Most of sample points in the factory were classified as the level of strong ecological risk, and most of sample points outside of the factory were classified as the level of moderate ecological risk. The non carcinogenic risk of 2,4-two chlorophenols, chromium and benzo （b） fluoranthene were below the acceptable risk control value.