Effects of flooding and aging on phytoremediation of typical polycyclic aromatic hydrocarbons in mangrove sediments by Kandelia obovata seedlings

被引：15
作者：
Li, Rui-Long [1 ]
Liu, Bei-Bei [1 ,2 ]
Zhu, Ya-Xian [3 ]
Zhang, Yong [1 ,4 ]
机构：
[1] Xiamen Univ, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China
[2] Chinese Acad Trop Agr Sci, Haikou 570100, Peoples R China
[3] Xiamen Univ, Coll Chem & Chem Engn, Dept Chem, Xiamen 361005, Peoples R China
[4] Zhangzhou Inst Technol, Zhangzhou 363000, Peoples R China
来源：
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY | 2016年 / 128卷
基金：
中国国家自然科学基金;
关键词：
Aging; Flooding; Mangrove sediment; PAHs; Phytoremediation; CONTAMINATED SOIL; SURFACE SEDIMENTS; PAHS; PLANT; PHENANTHRENE; RHIZOSPHERE; BIOAVAILABILITY; PYRENE; WATER; ECOSYSTEMS;
D O I：
10.1016/j.ecoenv.2016.02.002
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
A laboratory experiment was conducted to evaluate the effects of flooding and aging on the phytoremediation of naphthalene (Nap), anthracene (Ant) and benzo[a]pyrene (B[a]P) in mangrove sediment by Kandelia obovata (K. obovata) Druce seedlings. Flooding increased dissipation efficiency in the rhizosphere zone from 69.47% to 82.45%, 64.27% to 80.41%, and 61.55% to 78.31% for Nap, Ant and B[a]P, respectively. Aging decreased dissipation efficiency significantly. Further investigation demonstrated that increased enzyme activity was one of important factors for increasing PAHs dissipation rates in flooded mangrove sediments. Moreover, a novel method for in situ quantitative investigation of PAHs distribution in root tissues was established using microscopic fluorescence spectra analysis. Subsequently, the effects of flooding and aging on the distribution of PAHs in root tissues were evaluated using this established method. The order of bioavailable fractions of PAHs after phytoremediation was as follows: non-aging/non-flooding > flooding > aging. (C) 2016 Elsevier Inc. All rights reserved.
引用
收藏
页码：118 / 125
页数：8
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