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On basis of chemical extraction technology, H3PO4 has been used to remove heavy metals from the industrial sewage sludge. At the laboratory scale, heavy metals Zn, Pb, Cd, Ni, Cr and Cu were extracted synchronously from the sewage sludge. The results showed that H3PO4 concentrations had a significant effect on the extraction efficiency of heavy metals. The extraction efficiency increased gradually...
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...
Sewage sludge and the compost were evaluated through chemical characterization and toxicity testing to determine their suitability for land application. The application of sewage sludge/compost, slightly acidic with pH rang of 6.4-6.5, decreased the soil pH. The higher the sewage sludge/compost rates, the higher the mixed soil contents of electrical conductivity (EC), organic matter (OM), nitrogen...
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