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Sludge can be used in agriculture as a fertilizer and soil conditioner. But heavy metals are one of the important factors affecting the sludge for agricultural purpose. In this study, the concentration of Zn, Cu, Pb, Cr, Mn and Ni in seven kinds of sludge from Guangzhou were analyzed and the chemical speciation of heavy metals in the five kinds of sludge were studied. The results showed that the concentration...
The production of municipal sludge is very huge. Deposition of municipal sludge usually cause mental pollution, so deal with sludge and eliminate associated pollution is attractive. We focused on strategy of to resolve the sludge pollution through biological methods of agriculture utilization. Weeds of Scirpus planiculmis (SP) were used to remove the heavy metals of Cu, Zn, Pb, Cd, Cr, and Ni in the...
Sludge of two different ages (3 years old; Type 1 sludge, and 3 months old; Type 2 sludge) were applied to the following soil types: two luvisols, an arenosol and a vertisol at different rates to determine whether sludge application had any effect on the partitioning and consequently, bioavailability and mobility of Cu, Pb and Zn. A five- stage sequential extraction procedure was used to determine...
New guidelines for using biosolids in UK agriculture favour the use of enhanced treated biosolids, such as dried and composted cakes, due to concerns about the potential for transfer of pathogens into the food chain. However, there is a need to ensure that their use is environmentally acceptable and does not increase the risk to potable water supplies or the food chain from other contaminants such...
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