某染料厂地块1,2,4-三氯苯污染分布特征及迁移规律
Distribution and migration characteristics of 1,2,4-trichlorobenzene pollution in a dye factory plot
王硕 1乔鹏炜 1代小丽 1李佳斌 1魏燕 1魏文侠 1李培中1
作者信息
- 1. 北京市科学技术研究院资源环境研究所,工业场地污染与修复北京市重点实验室
- 折叠
摘要
以北京某染料厂污染地块为例,对 5 种氯苯类(氯苯、1,2-二氯苯、1,4-二氯苯、1,2,3-三氯苯、1,2,4-三氯苯)挥发性有机污染物在土壤及地下水中的浓度数据进行统计分析.选取土壤及地下水样品中检出浓度、超标倍数较高的 1,2,4-三氯苯,分析其在土壤中垂向分布特征及地下水中水平分布特征,利用GMS软件中MT3D模拟 1,2,4-三氯苯在地下水中溶质迁移规律.结果表明:土壤样品中 5 种氯苯类有机污染物最大检出浓度均超过相应筛选值;地下水样品中氯苯、1,2-二氯苯最大检出浓度均未超过相应筛选值,1,4-二氯苯、1,2,3-三氯苯、1,2,4-三氯苯最大检出浓度均超过相应筛选值.土壤中高浓度 1,2,4-三氯苯污染物主要集中在 0～10 m深度范围内,地下水中 1,2,4-三氯苯污染物浓度西北部明显高于东南部.地块内北侧地下水位线有轻微北移现象,各监测井地下水位处于缓慢下降趋势.地块内 1,2,4-三氯苯在 540 d时运移到地块南侧边界,运移距离为 96.2 m.
Abstract
Taking a contaminated plot of a dye factory in Beijing as an example,statistical analysis was carried out on the concentration data of five chlorobenzene volatile organic pollutants(chlorobenzene,1,2-dichlorobenzene,1,4-dichlorobenzene,1,2,3-trichlorobenzene,1,2,4-trichlorobenzene)in soil and groundwater.1,2,4-trichlorobenzene with high detected concentrations and exceedance multiples in soil and groundwater samples was selected,its vertical distribution characteristics in soil and horizontal distribution characteristics in groundwater were analyzed,and the solute migration law of 1,2,4-trichlorobenzene in groundwater was simulated by using MT3D in GMS software.This result indicated that the maximum detectable concentrations of the five chlorobenzene organic pollutants in soil samples all exceed the corresponding screening values,the maximum detectable concentrations of chlorobenzene and 1,2-dichlorobenzene in groundwater samples did not exceed the corresponding screening values,and the maximum detectable concentrations of 1,4-dichlorobenzene,1,2,3-trichlorobenzene and 1,2,4-trichlorobenzenene exceed the corresponding screening values.High concentration of 1,2,4-trichlorobenzene in soil was mainly concentrateded in the range of 0-10 m depth.The concentration of 1,2,4-trichlorobenzene in groundwater in the northwest was significantly higher than that in the southeast.There was a slight northward movement of the groundwater level line on the north side of the plot,and the groundwater level of each monitoring well was in a slow downward trend.1,2,4-trichlorobenzene in the block migrated to the southern boundary of the block at 540 d,with a migration distance of 96.2 m.The research results could provide a theoretical reference for precise control and reasonable restoration of polluted plots.
关键词
染料厂/土壤/地下水/1,2,4-三氯苯/分布特征/迁移Key words
dye factory/soil/groundwater/1,2,4-trichlorobenzene/distribution characteristics/migration引用本文复制引用
基金项目
北京市科学技术研究院创新培育项目(2023G-0007)
北京市科学技术研究院萌芽计划(2022A-0006)
北京市自然科学基金面上项目(8222045)
出版年
2024
NETL
NSTL
万方数据