|
|
Characteristics of heavy metals and radionuclides in surface sediments from the inner Bohai Bay (Tianjin coastal sea). |
|
|
Abstract Fourteen surface sediment samples were collected from the inner Bohai Bay (Tianjin coastal sea) to measure particle size, heavy metal and radioactivity. The sediments were majorly silt-size and the particle size decreases southwards and eastwards in study area. The ranges of heavy metal concentrations were 25.6~35.1mg/kg, 44.1~67.7mg/kg and 60~73.5mg/kg for Cu, Pb, Zn, respectively. The radioactivities for 210Pb and 137Cs were 13.2~35.3Bq/kg and 0.05~1.28Bq/kg, respectively. Heavy metals concentration and radioactivity decreases with the increase of particle size, and generally increases both from north to south spatially. In particular, the level of heavy metals and radioactivity in the central and southern area increases southeastwardly and eastwardly, respectively. That might be due to the fact that the fine particles are more effective in adsorbing metals than coarse particles, and the surface sediment particle size distribution can be affected by flow in Bohai bay.
|
Received: 20 October 2012
|
|
|
|
[1] |
CHEN Huan-Yu, LIU Jing-Qing, WEI Zong-Yuan, ZHANG Hui-Hui, HE Xiao-Fang, ZHOU Xiao-Yan, QIU Shang-De, HU Bao-Lan, LOU Li-Ping. Radial differences in contaminant distribution in large-diameter pipe scales of main pipelines in drinking water distribution system[J]. CHINA ENVIRONMENTAL SCIENCECE, 2015, 35(9): 2706-2712. |
|
|
|
|