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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 water system of Fen River in Shanxi province has upstream, midstream and downstream three sections, which are separately located in Jingyou, Jiexiu, Xiaodian, Hongtong, Linfen and Hejin, six sampling points are disposed there for the sake of collecting the samples of the filtered water and suspended matter, and measuring heavy metal contents. The measurement results show that heavy metal exist...
The concentration of eighteen nutrients and heavy metals in E. crassipes collected from different sites in the North Zhejiang, China was concurrently studied. The concentration of the elements in whole plants was in the order of K (14896.92 μg g-1)>P (5775.78 μg g-1)>S (5596.38 μg g-1)>Ca (2368.92μg g-1)>Pb (2380.03 μg g-1)>Mn (852.90 μg g-1)>Fe (782.63 μg g-1) >Al (456.26 μg...
The water quality in rainfall, throughfall, stemflow and litterthrough in the Fraxinus mandshurica at Eastern Mountainous Region in Heilongjiang Province had been studied. The indicator included pH, Do, TURB, TDS, COND, ORP, K, Na, Ca, Mg, Cu, Zn, Mn and Fe. The results showed that the chemical properties of rainfall has been changed after it passing through forest canopy. The value of Do and ORP...
Yunfu pyrite deposit bearing thallium (Tl) with proven reserves of three million tons' Tl in Guangdong Province, China has been extensively exploited since 1970. This study investigated contamination levels of Tl and other trace metals in ecosystem such as soils, surface waters, vegetables and crops in the area near the deposit. Results show that Tl in these samples nearby has greatly enriched and...
Twelve samples of surface sediment in Nanhu Lake, Wuhan city were collected and the concentrations of Organic Matter (OM), Total Nitrogen (TN), Total Phosphorus (TP), ammonia nitrogen (NH4+-N) and nitrate nitrogen (NO3--N) were determined; the average result were 6.58%, 3972, 1712, 897 and 20mg/kg separately. Cd, Hg, As, Cu, Pb, Cr and Zn were determined too; and the average value were 0.46, 0.140,...
Characterization of urban stormwater runoff was carried out in commercial, residential and cultural and educational zones during 2009 rainy season in Tianjin. The pH, DO, BOD5, COD, TOC, TSS, TN, TP, NH3-N, As, Pb, Zn, Cd, LAS and fecal coliforms in stormwater runoff were analyzed. The ranges of arithmetic mean concentration of COD, TSS, TN, LAS and fecal coliforms were 67-331 mg/L, 134-480 mg/L,...
Different methods were applied to recent soil survey data to estimate background concentration of zinc in paddy soils in central Anhui Province, China. Results with quite high consistency were obtained and a background concentration of 66.1 mg kg-1 was accepted and used for calculating zinc surplus in soils and thereafter for identifying areas with high anthropogenic zinc input. Spatial characteristics...
South Taihu Lake used to get less attention in terms of environmental pollution study in the past. Sediment and fish samples were collected from South Taihu Lake in 2009. Heavy metals were measured for both types of samples and potential health risks were evaluated. Concentration of Cu, Zn, Cr and Ni were determined for sediments samples, and Cu, Zn, Ni, Fe and Mn were determined for fish samples...
Drinking waters worldwide have experienced an increase in the occurrence of harmful algal blooms. Nutrients variance is hypothesised to be the main factor that causes algae populations outbreaks. The effects of trace nutrients and their interaction on the proliferation of planktonic algae colony, is one of the most complex factor in the formation process of algae blooms, and in addition the factor...
Groundwater quality plays a vital role in the safety of water supply. To assess groundwater quality in Quanzhou coastal area, a total of 183 groundwater samples were collected from shallow and deep wells in the area. Results of the study reveal that the main pollutants in Quanzhou coastal area are NO3-, NO2-, and NH4+. The values of pH vary from 4.05 to 7.85. About 3% of groundwater is very hard and...
The research reveals the distribution and correlation of heavy metals in groundwater of sewage irrigation area in Guangdong province. 14 groundwater samples were collected in August 2008, and the groundwater samples were filtrated through 0.45 μm membranes and acidified in the field. Determinations of Cd, Cu, Zn, Pb, Ni, and Cr in all the samples were performed using ICP-OES, and determinations of...
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