Distribution characteristics and ecological risk assessment of heavy metals in surface sediments in Modaomen distributary mouth of Pearl River Estuary
LI Ping1, GUO Xiao-juan1,2, YANG Qing-shu1,2, LUO Xiang-xin1,2, LIU Feng1,2, DONG Han-ying3, TAN Chao4
1. Institute of Estuarine and Coastal Research, School of Marine Sciences, Sun Yat-Sen University, Guangzhou 510275, China;
2. Estuarine Water Technology National and Regional United Engineering Laboratory, Guangzhou 510275, China;
3. School of Environmental Science and Engineering of Sun Yat-Sen University, Guangzhou 510275, China;
4. Guangdong Research Institute of Water Resources and Hydropower, Guangzhou 510630, China
Abstract：This paper determined the concentrations of 7 heavy metals including Cu, Zn, Mn, Ni, Pb, Cr and Cd in 76 sediment samples collected from Modaomen estuary, and analyzed the distribution characteristics, sources, effects of sedimentary environment and ecological risk of these elements. The results indicated that Cu、Mn、Ni、Pb and Cd in the study area came mainly from the Modaomen, and Zn、Cr had various sources. Characteristic of sediment grain size was the main factor that influenced the distribution of 5 elements including Cu、Mn、Ni、Pb and Cr. The potential ecological risk of the study area was generally serious, and the ecological risk of the surface sediments was mainly caused by Cd.
LI Ping,GUO Xiao-juan,YANG Qing-shu et al. Distribution characteristics and ecological risk assessment of heavy metals in surface sediments in Modaomen distributary mouth of Pearl River Estuary[J]. Marine Environmental Science, 2017, 36(5): 746-753.
YE F,HUANG X P,ZHANG D W,et al.Distribution of heavy metals in sediments of the Pearl River Estuary,Southern China:Implications for sources and historical changes[J].Journal of Environmental Sciences,2012,24(4):579-588.
WILLIAMSON R B,VAN DAM L F,BELL R G,et al.Heavy metal and suspended sediment fluxes from a contaminated,intertidal inlet (Manukau Harbour,New Zealand)[J].Marine Pollution Bulletin,1996,32(11):812-822.
GRAY C W,MCLAREN R G,ROBERTS A H C,et al.The effect of long-termphosphatic fertiliser applications on the amounts and forms of cadmium in soils under pasture in New Zealand[J].Nutrient Cycling in Agroecosystems,1999,54(3):267-277.
[18]
FACCHINELLI A,SACCHI E,MALLEN L,et al.Multivariate statistical and GIS-based approach to identify heavy metal sources in soils[J].Environmental Pollution,2001,114(3):313-324.
[an error occurred while processing this directive] | [an error occurred while processing this directive]
