[Distribution of mercury in surficial sediments from main mangrove wetlands of China].
Surficial sediment samples were collected from main mangrove wetlands of China, mercury, pH, salinity, organic matters, grain size, Fe/Hg, Mn/Hg were analyzed. Mercury content ranges from 2.3 to 903.6 ng x g(-1), with a average of (197 +/- 137.6) ng x g(-1). Compared with local background level, serious Hg pollution with high Hg content was found in 7 areas, including Luoyangqiao [(467.5 +/- 68.8) ng x g(-1)], Fugong [(438.2 +/- 147.0) ng x g(-1)], Ewan [(264.3 +/- 89.2) ng x g(-1)], Yaojiayu [(125.4 +/- 27.1) ng x g(-1)], Fujian Province; Sanya [(164.8 +/- 143.9) ng x g(-1)], Dongzhaigang [(314.1 +/- 335.7) ng x g(-1)], Hainan Province, Shenzhen [(179.9 +/- 7.7) ng x g(-1)], Guangdong Province. Hg content was similar with background value in the other 6 areas, including Yunxiao [(63.3 +/- 43.9)ng x g(-1)], Fujian Province; Gaoqiao [(178.6 +/- 127.0) ng x g(-1)], Guangdong Province; Daguansha [(26.1 +/- 18.8) ng x g(-1)], Shankou [(73.8 +/- 21.1) ng x g(-1)], Beilun estuary [(117.8 +/- 51.4) ng x g(-1)], Qinzhou Bay [(147.5 +/- 107.6) ng x g(-1)], Guangxi Autonomous Region. Discrepancy of total Hg concentrations in mangrove wetlands is due to many environmental factors and human activities. Parameters such as grain size, pH, organic matter, Fe/Hg, Mn/Hg are significantly correlated with total Hg respectively. Clay and Fe/Hg are obvious factors influencing total Hg concentration. Impact of environmental factors on mercury can be showed by regression equation.
Ding
Zhen-hua
ZH
School of Life Science, Xiamen University, Xiamen 361005, China. dzh@xmu.edu.cn
Liu
Jin-ling
JL
Li
Liu-qiang
LQ
Lin
Hui-na
HN
Wu
Hao
H
Hu
Zhen-zhen
ZZ
D002681:China; D004784:Environmental Monitoring; D004785:Environmental Pollutants / Q000032:analysis*; D019015:Geologic Sediments / Q000032:analysis*; D008628:Mercury / Q000032:analysis*; D043982:Rhizophoraceae / Q000254:growth & development*; D053833:Wetlands
D004785:Environmental Pollutants; D008628:Mercury