Plant uptake, accumulation and translocation of phenanthrene and pyrene in soils

被引:451
作者
Gao, YZ [1 ]
Zhu, LZ [1 ]
机构
[1] Hangzhou Univ, Dept Environm Sci, Hangzhou 310028, Peoples R China
关键词
phytoremediation; polycyclic aromatic hydrocarbons (PAHs); phenanthrene; pyrene; uptake; accumulation; translocation;
D O I
10.1016/j.chemosphere.2004.01.037
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Uptake, accumulation and translocation of phenanthrene and pyrene by 12 plant species grown in various treated soils were comparatively investigated. Plant uptake and accumulation of phenanthrene and pyrene were correlated with their soil concentrations and plant compositions. Root or shoot accumulation of phenanthrene and pyrene in contaminated soils was elevated with the increase of their soil concentrations. Significantly positive correlations were shown between root concentrations or root concentration factors (RCFs) of phenanthrene and pyrene and root lipid contents. The RCFs of phenanthrene and pyrene for plants grown in contaminated soils with initial phenanthrene concentration of 133 mg kg(-1) and pyrene of 172 mg kg(-1) were 0.05-0.67 and 0.23-4.44, whereas the shoot concentration factors of these compounds were 0.006-0.12 and 0.004-0.12, respectively. For the same soil-plant treatment, shoot concentrations and concentration factors of phenanthrene and pyrene were generally much lower than root. Translocations of phenanthrene and pyrene from shoots to roots were undetectable. However, transport of these compounds from roots to shoots usually was the major pathway of shoot accumulation. Plant off-take of phenanthrene and pyrene only accounted for less than 0.01% of dissipation enhancement for phenanthrene and 0.24% for pyrene in planted versus unplanted control soils, whereas plant-promoted biodegradation was the predominant contribution of remediation enhancement of soil phenanthrene and pyrene in the presence of vegetation. (C) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1169 / 1178
页数:10
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