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Dongjiang River Basin is the world's most populous and highly economic development region over last few decades. Heavy metal records of 51 representative points of the Dongjiang River were presented, aim to evaluate the expected water resources and to investigate the potential for improving our aquatic environment. We find, heavy metal concentrations of both water and sediments indicated a good level...
The research reveals the mobility and distribution of heavy metals (Cd, Cu, Zn, Mn, Ni, and Cr) in soil of sewage irrigation area in Pearl River Delta. Samples were collected from topsoil (0-10cm) and subsoil (30-40cm), and the total concentration and available concentration of heavy metals were extracted by HNO3-HF-HClO4 and DTPA respectively. The mean total concentrations for all of the heavy metals...
With the Tessier Five-step Continuous Extracting Method, the thesis studied the form distribution of heavy metals in the sediment samples collected from Mochou Lake, Xuanwu Lake and Qinhuai River in Nanjing, analyzed the correlation between leaching contents of heavy metals and various forms and between content of organic matter and leachability of heavy metals and between organic matter and organic...
The study was aimed at investigating the local plants along two sides of Dagu River to achieve guidance on the harness, remediation or management of Dagu River. For this, the herbage plant species and their covering area, heavy metal contents in the plants, and the correlation analysis between metals in local plants and in nearby sediments were investigated. Results indicate that the dominant plants...
Determination of optimal sampling transects and pollutants for river sediments are essential and valuable. To determine if the concentration of some metals were highly correlated, correlations between heavy metals (As, Pb, Cd, Cr, Hg, Cu, Ni and Zn) were analyzed using statistic analysis software (SAS) based on monitoring data of heavy metals along the whole watercourse sediments of Dagu River. To...
Three sediment short column cores were collected form Licun estuary of Jiaozhou Bay. Acid volatile sulfide (AVS) and simultaneously extracted metals (SEM, including Cu, Cd, Ni, Pb and Zn) were analyzed. The distribution characteristics and biological availability of heavy metals were studied. AVS contents in sediment samples ranged from 0.5μmol/g to 114.1μmol/g with an average value of 21.7μmol/g,...
Taking the main pollution source of sewage river in north China as study object, concentrations of ammonia, chemical oxygen demand and heavy metals in sources of pollution and nearby water are determined. The two dimension steady river water quality models of ammonia and chemical oxygen demand are established, and the geometric characteristics of pollutant zone at downstream of the pollution source...
The presence of heavy metals in the sludge produced in wastewater treatment plants restricts the application of sludges in agriculture. Forty-four sludge samples were collected from 15 cities within Yangtze River Delta region, and the total contents of heavy metals (Cu, Zn, Pb, Cd, Cr, Ni) were investigated. The results demonstrated that the contents of heavy metals in sludge samples varied significantly...
The distributions, contamination status and annual sedimentation flux of trace metals (Cu, Fe, Mn, Ni, Pb and Zn) in surface sediments of the East China Sea (ECS) were studied in the present work. The concentration ranges of trace metals in surface sediments of the ECS were as follows: Cu, 4.29-41.5 mug/g; Pb, 10-44.8 mug/g; Zn, 18.2-114 mug/g; Ni, 8.17-48.64 mug/g; Mn, 152- 1152 mug/g ; Fe, 0.62-3...
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