文献类型：期刊文献

中文题名：Removal of Pyrene from Contaminated Soils by White Clover

英文题名：Removal of Pyrene from Contaminated Soils by White Clover

作者：Xu Sheng-You[1,2,3];Chen Ying-Xu[1];Lin Kuang-Fei[3];Chen Xin-Cai[1];Lin Qi[1];Li Feng[1];Wang Zhao-Wei[1]

机构：[1]Zhejiang Univ, Dept Environm Engn, Hangzhou 310029, Zhejiang, Peoples R China;[2]Huangshan Univ, Coll Life & Environm, Huangshan 245041, Peoples R China;[3]E China Univ Sci & Technol, Sch Resource & Environm Engn, Shanghai 200237, Peoples R China

年份：2009

卷号：19

期号：2

起止页码：265

中文期刊名：Pedosphere

外文期刊名：PEDOSPHERE

收录：CSTPCD;;Scopus;WOS:【SCI-EXPANDED(收录号:WOS:000264736200015)】；CSCD:【CSCD2011_2012】；PubMed;

基金：Project supported by the National Natural Science Foundation of China (Nos. 40432004 and 20677015), the Postdoctoral Science Foundation of China (No. 20070420094), the Postdoctoral Science Foundation of Shanghai Municipality, China (No. 08R214116), the Science and Technology Commission of Shanghai Municipality, China (No. 0752nm025), and the National High-Tech Research and Development Program (No. 2007AA06Z331).

语种：英文

中文关键词：microbial degradation; phytoremediation; plant uptake and accumulation; pyrene; white clover

外文关键词：microbial degradation; phytoremediation; plant uptake and accumulation; pyrene; white clover

摘要：Phytoremediation has been used as an emerging technology for remediation of soil contamination with polycyclic aromatic hydrocarbons(PAHs),ubiquitous persistent environmental pollutants derived from natural and anthropogenic processes,in the last decade.In this study,a pot experiment was conducted to investigate the potential of phytoremediation of pyrene from spiked soils planted with white clover(Trifolium repens)in the greenhouse with a series of pyrene concentrations ranging from 4.22 to 365.38 mg kg-1.The results showed that growth of white clover on pyrenecontaminated soils was not affected.The removal of pyrene from the spiked soils planted with white clover was obviously higher than that from the unplanted soils.At the end of the experiment(60 d),the average removal ratio of pyrene in the spiked soils with white clover was 77%,which was 31%and 57%higher than those of the controls with or without micobes, respectively.Both roots and shoots of white clover took up pyrene from the spiked soils and pyrene uptake increased with the soil pyrene concentration.However,the plant-enhanced dissipation of soil pyrene may be the result of plant-promoted microbial degradation and direct uptake and accumulation of pyrene by white clover were only a small part of the pyrene dissipation.Bioconcentration factors of pyrene(BCFs,ratio of pyrene,on a dry weight basis,in the plant to that in the soil)tended to decrease with increase in the residual soil pyrene concentration.Therefore,removal of pyrene in the contaminated soils was feasible using white clove.
Phytoremediation has been used as an emerging technology for remediation of soil contamination with polycyclic aromatic hydrocarbons (PAHs), ubiquitous persistent environmental pollutants derived from natural and anthropogenic processes, in the last decade. In this study, a pot experiment was conducted to investigate the potential of phytoremediation of pyrene from spiked soils planted with white clover (Trifolium repens) in the greenhouse with a series of pyrene concentrations ranging from 4.22 to 365.38 mg kg(-1). The results showed that growth of white clover on pyrene-contaminated soils was not affected. The removal of pyrene from the spiked soils planted with white clover was obviously higher than. that from the unplanted soils. At the end of the experiment, (60 d), the average removal ratio of pyrene in the spiked soils with white clover was 77%, which was 31% and 57% higher than those of the controls with or without micobes, respectively. Both roots and shoots of white clover took up pyrene from the spiked soils and pyrene uptake increased with the soil pyrene concentration. However, the plant-enhanced dissipation of soil pyrene may be the result of plant-promoted microbial degradation and direct uptake and accumulation of pyrene by white clover were only a small part of the pyrene dissipation. Bioconcentration factors of pyrene (BCFs, ratio of pyrene, on a dry weight basis, in the plant to that in the soil) tended to decrease with increase in the residual soil pyrene concentration. Therefore, removal of pyrene in the contaminated soils was feasible using white clove.