Remedial function of submersed macrophyte Vallisneria natans to PAHs-contaminated sediments

被引：6
|
作者：
Zhang Y. [1 ,2 ]
Yan Z. [2 ]
Wu H. [1 ]
Jiang H. [2 ]
Hao Z. [2 ,3 ]
机构：
[1] College of Urban Construction, Nanjing University of Technology, Nanjing
[2] State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing
[3] University of Chinese Academy of Sciences, Beijing
来源：
Hupo Kexue/Journal of Lake Sciences | 2018年 / 30卷 / 04期
关键词：
Lake Taihu; PAHs; Remediation; Sediment; Submersed macrophyte; Vallisneria natans;
D O I：
10.18307/2018.0414
中图分类号：
学科分类号：
摘要：
Submersed macrophytes are an important functional and structural element of shallow aquatic ecosystems. Remedial function of submersed macrophyte (Vallisneria natans) to PAHs in freshwater sediments was investigated in different pollution levels in east Lake Taihu. Over a 34-day plant remediation experiment, the removal rate and the first-order rate constants of PAHs degradation in the heavily contaminated sediments of Dashui harbour from east Lake Taihu was 62% and 0.024 d-1, respectively. However, 42% PAHs removal and 0.015 d-1 of PAHs degradation rate was also observed in the moderately contaminated sediments of east Lake Taihu bay. The degradation rate of PAHs in the planted sediments was 2-3 times higher than those in the unplanted sediments. The removal of high molecular weight (HMW) PAHs in sediments with planting V. natans was significantly observed. Thus, V. natans can be effectively used for the remediation of PAHs contaminated sediments, especially in heavily polluted and HMW-PAHs contaminated sediments. © 2018 by Journal of Lake Sciences.
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页码：1012 / 1018
页数：6
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