Concentrations, Distribution, and Ecological Risk Assessment of Heavy Metals in Daya Bay, China
作者： Huijuan Tang , Zhixin Ke , Muting Yan , Wenjing Wang , Huayue Nie
DOI: 10.3390/W10060780
关键词:
摘要: Surface sediment samples were collected from 19 sites throughout Daya Bay, China to study the concentrations, spatial distributions, potential ecological risk, and possible sources of heavy, including metals copper (Cu), zinc (Zn), arsenic (As), cadmium (Cd), nickel (Ni), lead (Pb), mercury (Hg), chromium (Cr). The mean concentrations eight heavy 24, 109, 6.5, 0.09, 35.3, 26.8, 0.07, 109 µg g−1, respectively. most within range those recorded in previous years. distribution pattern similar, with lowest values along southeast coast open sea area; highest northern especially northwest. Cu, Zn, As, Cd, Pb, Hg classified as Class I, Ni Cr II according Sediment Quality Guidelines (SQGs) China. risk (Eif) indices Ni, specify that these pose low ecosystem whereas Cd a very high some sites. geoaccumulation (Igeo) weak or no pollution indicate moderate even pollution. Spatial distribution, carbon/nitrogen analysis, Pearson correlation, principal components analysis indicated Cr, total organic carbon (TOC), nitrogen (TN) originated same sources. Ballast water sewage cargo ships park at harbors anchor Bay important for TOC, TN. Other anthropogenic sources, such agricultural runoff aquaculture, might also be responsible, other point
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