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The major limitation of soil application of sewage sludge compost is the total heavy metal contents and their bioavailability and mobility. This study was conducted to evaluate the effect of mature compost as a bulking agent on reduction the mobility and bioavailability of Zn, Cu, Pb and Cr during the sewage sludge composting process. The three composting processes: sewage sludge(SS), sewage sludge...
The metal elements in rhubarb roots were separated into soluble state and suspension state by 0.45 μm membrane filter based on traditional analytical flowchart program. The rhubarb roots at different producing areas and the decoction of rhubarb roots were pretreated by wet digestion, and then the metal elements were determined by ICP-MS analysis. The results indicate that there is obvious difference...
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...
The effects of two earthworm species (Eisenia foetida and Allolobaphora caliginosa) on the bioavailability of Zn or Pb were studied in three soils (Cinnamon soil, Aquic brown soil and Acid brown soil) spiked with 200 mg kg-1 Zn or 400 mg kg-1 Pb, respectively. The results showed that Eisenia foetida and Allolobaphora caliginosa were tolerant to Zn or Pb. but the growth of earthworms was adversely...
Five elements (iron, manganese, copper, zinc and lead) in three surficial sediments (SSs) and three natural surface coating samples (NSCSs) from the Songhua River, northeast of China were analyzed with the modified sequential extraction procedure (MSEP) to compare the metal distribution and bioavailability in the two solid phases. The results indicated that Cu was present mainly in the bound to organic...
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