设为首页  |   加入收藏
引用本文:
【打印本页】   【下载PDF全文】   查看/发表评论  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 396次   下载 463 本文二维码信息
码上扫一扫!
分享到: 微信 更多
污染场地土壤修复目标值差异探讨 ——以重庆某化工厂遗留场地为例
余云飞, 杨世辉, 严 浩
中冶赛迪技术研究中心有限公司
摘要:
污染场地土壤修复目标值确定对于土壤污染的修复效果至关重要,也是污染土壤修复工程实践中出现的难点。国家环境保护部已正式发布了《污染场地风险评估技术导则》(HJ25.3—2014),但实际上《土壤环境质量标准》(GB15618—1995)、《展览会用地土壤环境质量评价标准》(HJ350—2007)等土壤环境质量标准仍未修订或废止,导致两种评价方式并行,且两种不同方式确定的修复目标值存在明显差异,为修复工作带来了极大的困难。本文调查了重庆某化工厂遗留场地土壤污染现状,分别通过两种评价方式确定了修复目标值,结果显示,两种评价方法确定的超标最严重污染物均为苯并[a]芘,但风险评估模型计算的和土壤环境质量标准确定的修复目标值存在较大差异,分别为0.041、0.3 mg/kg,计算确定的修复目标值低于现有标准规定的适用限值,建议国家尽快修订或出台与风险评估模型相适应的土壤环境质量标准。
关键词:  场地修复  风险评估  现行标准  修复目标
DOI:10.13758/j.cnki.tr.2018.05.017
分类号:X825
基金项目:
Inconsistency of Soil Remediation Targets Derived from Risk Assessment Model and Environmental Standards: A Case Study of a Chemical Plant in Chongqing, Southwest China
YU Yunfei, YANG Shihui, YAN Hao
CISDI Research & Development Co., Ltd.
Abstract:
Remediation target of contaminated site is crucial to soil remediation project, but remains as a challenge. ‘Technical Guidelines for Risk Assessment of Contaminated Sites (HJ25.3—2014)’ was officially issued by Ministry of Ecology and Environment, however, other environmental quality standards for soil amendment are not abolished or still valid, such as the ‘Soil Environmental Quality Standards (GB15618—1995)’ and‘Standard of Soil Quality Assessment for Exhibition Sites (HJ350—2007)’, etc., resulting in confusion and inconsistency in determining the remediation targets, which has triggered lots of problems in soil remediation. In this paper, based on the survey of a chemical plant in Chongqing, remediation targets are determined and compared by risk assessment model and environmental standards, respectively. Results indicated that for both evaluation systems the most dominant soil pollutant was benzo-(a)-pyrene, but the remediation targets varied significantly, which was 0.041mg/kg for risk assessment model and 0.3 mg/kg for environmental quality standards. Therefore, it is urgent tor revise and issue current soil environmental quality standards to match the soil risk assessment models.
Key words:  Site remediation  Risk assessment  Standard  Remediation target

您是第2222215位访问者
版权所有 © 《土壤》编辑部
本系统由北京勤云科技发展有限公司设计   京ICP备09084417号