典型人工湿地系统中植物对苯并[a]芘的去除作用及机制  

Removal of benzo[a]pyrene by plants in typical constructed wetland system and its mechanism

作　　者：陈信含 张建[1,2] 胡振[3] 刘华清 蒋鹏 CHEN Xinhan;ZHANG Jian;HU Zhen;LIU Huaqing;JIANG Peng(Institute of Yellow River Delta Earth Surface Processes and Ecological Integrity,Shandong University of Science and Technology,Qingdao,266590,China;College of Safety and Environmental Engineering,Shandong University of Science and Technology,Qingdao,266590,China;School of Environmental Science&Engineering,Shandong University,Qingdao,266237,China;Shandong Environmental Protection Industry Research Institute,Jinan,250000,China)

机构地区：[1]山东科技大学,黄河三角洲地表过程与生态完整性研究院,青岛266590 [2]山东科技大学安全与环境工程学院,青岛266590 [3]山东大学环境科学与工程学院,青岛266237 [4]山东环保产业研究院有限公司,济南250000

出　　处：《环境化学》2023年第3期1042-1048,共7页Environmental Chemistry

基　　金：国家自然科学基金重点国际合作研究项目(51720105013)资助.

摘　　要：人工湿地(CWs)可有效去除环境中的苯并[a]芘(BaP),湿地植物对BaP的吸收是受生物、化学等因素影响的复杂过程,其对CWs中BaP环境归趋的影响机制还不明确.本文系统分析了典型湿地植物菖蒲中BaP的去除、吸收和归趋规律.结果表明,菖蒲可累积大量的BaP,含量达到(2.13±0.05)μg·g^(−1);根部组织中观察到较高浓度的BaP,BaP可以更容易地从菖蒲的根部到地上部组织进行迁移.菖蒲大幅提升了CWs对BaP的去除效果,菖蒲CWs的BaP去除率较对照系统提升79.47%.菖蒲的根系分泌物可以提高BaP的生物可利用性,加速BaP的组分净化和转化.Constructed wetlands(CWs)can effectively remove benzo[a]pyrene(BaP)from the environment.The absorption of BaP by wetland plants is a complex process affected by biological,chemical and other factors,and its impact mechanism on the environmental fate of BaP in CWs is still unclear.In this paper,the removal,absorption and fate of BaP in typical wetland plant Acorus calamus were systematically analyzed.The results showed that Acorus calamus could accumulate a large amount of BaP.The content of BaP in Acorus calamus could reach(2.13±0.05)μg·g^(−1).Higher concentrations of BaP were observed in the root tissues,and BaP could migrate more easily from the root to the shoot tissues.The BaP removal rate of CWs with Acorus calamus was 79.47%higher than that of the control CWs,indicating the presence of Acorus calamus can greatly improve the removal effeciency of CWs on BaP.The root exudates of Acorus calamus can enhance the bioavailability of BaP and subsequently accelerate the purification and transformation of BaP components.

关 键 词：苯并[a] 芘 环境归趋 人工湿地 植物 根际 

分 类 号：X703[环境科学与工程—环境工程] X173