摘要
焦化行业产生的环境污染问题一直倍受关注,尤其是在中国唐山等焦化企业聚集地.为探讨唐山地区焦化厂周围地表水中多环芳烃(Polycyclic Aromatic Hydrocarbons, PAHs)的污染特征并对其进行风险评价,选取该地区某典型焦化厂,通过对其周围水样的采集与检测,解析了该焦化厂周边地表水中PAHs的组成特征、生态风险商值及(非)致癌风险指数,并对模型参数进行了敏感性分析.结果显示,区域内地表水体中∑16PAHs平均含量为0.757μg·L^(-1),以低分子量蒽(Anthracene, Ant)和高分子量荧蒽(Fluoranthene, Flt)为主,其中,Ant为距离焦化厂较远水体的特征污染物,而焦化厂内部及外围水体则以Flt为特征污染物.生态风险评价表明,∑PAHs在研究区大部分地表水中存在较高生态风险.健康风险评价表明,整体上女性承受的(非)致癌风险高于男性;皮肤暴露产生了一定的(非)致癌风险,且其非致癌风险指数呈现出随年龄增加而上升的趋势.敏感性分析显示,体重、暴露频率、每日饮用水摄入量等参数在模型中对各个暴露途径均有较高影响,需要在风险评价中加强关注.该研究有利于推动对焦化场地地表水PAHs污染的治理与防控,也为进一步探索焦化场地PAHs污染和迁移特征提供了理论基础.
Pollution caused by coking industries in Tangshan city has been a serious environmental problem. To identify the pollution characteristics and evaluate potential risk, we investigated sixteen polycyclic aromatics hydrocarbons(PAHs) in eleven surface water samples collected from the surrounding area of a typical coking plant in Tangshan. The average concentration of total dissolved PAHs dominated by Anthracene(Ant) and Fluoranthene(Flt) was 0.757 μg·L^(-1). Ant and Flt were representative pollutants at a distance to and near the coking plant respectively. Ecological risk assessment showed that most study sites suffered high ecological risk caused by PAHs pollution. Health risk assessment showed that neither noncancer nor cancer risk caused by dermal exposure could be neglected. The noncancer risk generally indicated an increasing trend following aging. Furthermore, females suffered higher health risk than males did. The sensitivity of parameters in models like body weight, exposure frequency and daily water intake rate deserved attention. These findings necessitated prompt and effective countermeasures to control pollution around the coking plant, which also underlay future researches on transport and transformation of PAHs in coking area.
作者
邢淑萍
李林凤
符耿雪
冯海艳
郝志鹏
张莘
陈保冬
XING Shuping;LI Linfeng;FU Gengxue;FENG Haiyan;HAO Zhipeng;ZHANG Xin;CHEN Baodong(State Key Laboratory of Urban and Regional Ecology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085;University of Chinese Academy of Sciences,Beijing 100049;School of Earth Sciences and Resources,China University of Geosciences,Beijing 100083)
出处
《环境科学学报》
CAS
CSCD
北大核心
2021年第9期3586-3597,共12页
Acta Scientiae Circumstantiae
基金
“十三五”国家重点研发计划项目(No.2018YFC1800302)
国家自然科学基金面上项目(No.41977042,21677164)。
关键词
多环芳烃
焦化厂
地表水
特征污染物
风险评价
唐山
PAHs
coking plant
surface water
particular pollutant
risk assessment
Tangshan
