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The research reveals the relationship and enrichment of heavy metals in soil of sewage irrigation area in Guangdong province, southern China. Samples were collected from topsoil (0-10cm) and subsoil (30-40cm), and the total concentrations of heavy metals were extracted by HNO3-HF-HClO4. It is concluded that Cu, Zn, Cd, and Pb may be homologous or combined pollution, and Mn and Cr may be also homologous...
Heavy metal contamination of soil is of major concern from an ecological point of view. This study aims to characterize soil samples from different sites of two waste disposal grounds in Malaysia, to study heavy metal contamination in the landfill environment. The soil samples were obtained at different depths from 2m to 35m deep to find the possibility of heavy metal migration from the waste cell...
Contents of heavy metals in six vegetable species and the corresponding rhizospheric soils around a lead-zinc mining and smelting plant in Nanjing, China were investigated to assess the possible risks of heavy metal posed to human health through food chain and to discuss the relationships of heavy metals contents in vegetables and the corresponding rhizospheric soils. Compared to national sanitation...
In this paper, a probe into the stabilization effects of ferrous sulfate (FeSO4) came from two aspects-stabilization efficiency and leachate content. Fe/As molar ratio, arsenic pollution intensity, soil pH, reacted time interval, competitive ions, such as sulfate(SO42-), phosphate(PO43-) and zinc ion(Zn2+), were studied in order to discuss their effects on the stabilization of arsenic. Results show...
Based on new portable instruments (mini-medium-volume sampler), intensive samplings on inhalable particulate matter (PM10) in Jiaozuo city have been conducted, the mass concentrations of PM10 was weighted, and the content of parts of heavy metals of PM10 was tested by ICP-MS in this paper. The relationship between the concentration of PM10 and the meteorological condition was discussed. The experiments...
Soil pollution is a worldwide problem. Both inorganic and persistent organic pollutants (POPs) possess high toxicity and long-term persistence. Biosurfactant based remediation technologies for contaminated soil are of increasing importance recently, and they have been demonstrated to be effective in uptaking both heavy metals such as Cd, Pb, Zn, Cu, and organic pollutants like hydrophobic organic...
Atmospheric deposition samples were collected and analyzed from 50 sampling sites in Baoshan district, Shanghai. The results show that the average concentration of Pb, Cr, Cd, Zn and Cu is 281.88, 254.45, 7.06, 2433.92 and 3321·08mg-kg-1 respectively, which are much higher than background values of soil in Shanghai. The spatial distribution features of live heavy metals illustrate higher concentrations...
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...
To reveal the spatial variability of soil heavy metals under the influence of urban expansion, Yingxing city of Jiangsu province was selected as study area. Three transects were arranged in the urban-rural ecotone. 24 surface soil samples were collected. And the contents of heavy metals including Hg, Pb, Cu and Zn were measured and analyzed. The results were as follows: (1) Hg contamination and Pb,...
Heavy metal accumulations in edible plants are commonly reported by scientist to alert the public on potential risks of toxicity effects. The study was conducted to determine the heavy metal accumulation in different part of the plant tissue namely Ipomoea reptans and Helianthus annuus. Spent batteries were utilized as the source of contamination with natural leaching process. Results indicated that...
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