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《Tropical Geography》 2013-05
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Heavy-Metal Contamination at the Nankeng River and Phytoaccumulation of Riparian Plants

YANG Long;WEN Meili;ZHOU Xia;LI Xinghua;FU Shuqing;ZHANG Hong′ou;FANG Guoxiang;HUANG Jianming;Guangzhou Institute of Geography;  
The Nankeng River,a branch of the Xinfengjiang River,directly flows into Xinfengjiang reservoir,which is the largest drinking water source in Guangdong Province.During the field survey,waste water without treatment was inflooded the Nankeng River due to lawless mining.So 9 common pollutants,Fe,Mn,Cu,Zn,Pb,Cd,Cr,as and Hg,were determined in the water and sediments of the Nankeng River.The results showed that water was contaminated seriously in low water period.In 2011 and 2012,the contents of Pb,As and Hg in water were 1.7-1.8,1.3-1.9 and 1.6-2.9 times over the second grade of drinking water quality standard,respectively,while those of Cu,Cd,Pb,Zn and As in sediments were 4.8,9.0,3.9,4.3 and 10.9 times,respectively,over the soil quality standard.Otherwise,the riparian plants from Nankeng River were collected and identified,and 15 plant species,dominated by fern and perennial grass,were found.The 9 common pollutants in plants were also examined,and the results indicated that Pteris vittata was not only an arsenic-accumulating plant,but also a compound-accumulator,which can be used in the soil remediation of multiple contamination.
【Fund】: 广东省水利科技创新项目(2009-44);; 广东省科技计划(2007A032400002);; 广东省科学院分析测试基金(sf2005)
【CateGory Index】: X830;X173
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