黑臭水体沉积物中新型溴代阻燃剂的污染特征  

Occurrence,spatial distribution,and risk assessment of novel brominated flame retardants in sediments from black-odorous rivers

作　　者：黄晨晨 曾艳红 管克兰 刘银娥 鲁祺鸿 汪善全 罗孝俊[2] 麦碧娴[2] HUANG Chen-chen;ZENG Yan-hong;GUAN Ke-lan;LIU Yin-e;LU Qi-hong;WANG Shan-quan;LUO Xiao-jun;MAI Bi-xian(School of Environmental Science&Spatial Informatics,China University of Mining&Technology,Xuzhou 221116,China;State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Resources Utilization and Protection,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China;School of Environmental Science and Engineering,Sun Yat-sen University,Guangzhou 510006,China)

机构地区：[1]中国矿业大学环境与测绘学院,江苏徐州221116 [2]中国科学院广州地球化学研究所,有机地球化学国家重点实验室与广东省资源环境利用与保护重点实验室,广东广州510640 [3]中山大学环境科学与工程学院,广东广州510006

出　　处：《中国环境科学》2024年第7期3945-3954,共10页China Environmental Science

基　　金：国家自然科学基金资助项目(42161160306,42277242,41977306,41931290,42207250);广东省科技项目(2020B1212060053);有机地球化学国家重点实验室项目(SKLOG2020-7,SKLOG2020-4);江苏省科技项目(BK20221141)。

摘　　要：测定了中国74个城市的173条黑臭水体沉积物中6种新型溴代阻燃剂(NBFRs)的污染现状.结果表明,十溴二苯乙烷(DBDPE)是沉积物中主要的NBFRs,其浓度范围为未检出~603.76ng/g干重,平均浓度占比高达(99.49±0.82)%;六溴苯(HBB)和五溴甲苯(PBT)占比较低.NBFRs的组成符合其在中国的生产和使用情况.尽管DBDPE、HBB和PBT均在不同城市间具有显著的浓度差异,但是总体呈现东部高(华南、华东和东北地区)、西部低(西北和西南地区)的分布格局,各地区的产业结构和城市化率是控制其空间分布的重要因素.DBDPE作为多溴联苯醚十溴工业品(BDE209)的替代品,其在沉积物中的浓度仍普遍低于BDE209,且DBDPE/BDE209比值与各城市的生产总值和工业产值呈显著的负相关关系.生态风险评价表明黑臭水体沉积物中DBDPE、HBB和PBT均不足以对水生生物造成暴露风险.In the current study,the pollution characteristics of six novel brominated flame retardants(NBFRs)in sediments from 173 black-odorous urban rivers in 74 Chinese cities were comprehensively investigated.The results indicated that decabromodiphenyl ethane(DBDPE)was the predominant NBFR,with a concentration range of undetected-603.76ng/g dry weight and an average proportion of(99.49±0.82)%.However,the concentration proportions of hexabromobenzene(HBB)and pentabromotoluene(PBT)were very low.These concentration compositions of NBFRs in sediments were consistent with their production and use history in China.Although the concentrations of DBDPE,HBB,and PBT showed significant differences among various sampling cities,they generally followed similar distribution patterns,with higher concentrations in eastern regions(South,East,and Northeast China)and lower concentrations in western regions(Northwest and Southwest China).These distribution patterns of NBFRs were strongly associated with the industrial structure and urbanization of each city.Besides,the concentrations of DBDPE,the alternative of Deca-BDEs(BDE209),were generally lower than those of BDE209 in sediments.The concentration ratios of DBDPE to BDE209 were generally significantly negatively correlated with the gross domestic product and local industrial output.The results of ecological risk assessment suggested that DBDPE,HBB,and PBT in black-odorous urban river sediments had no risk to aquatic biota.

关 键 词：城市黑臭水体 表层沉积物 新型溴代阻燃剂 污染特征 生态风险评估 

分 类 号：X522[环境科学与工程—环境工程]