Changes of Cu, Zn, and Ni chemical speciation in sewage sludge co-composted with sodium sulfide and lime.

@article{Wang2008ChangesOC,
  title={Changes of Cu, Zn, and Ni chemical speciation in sewage sludge co-composted with sodium sulfide and lime.},
  author={Xue-jiang Wang and Ling Chen and Si-qing Xia and Jianfu Zhao},
  journal={Journal of environmental sciences},
  year={2008},
  volume={20 2},
  pages={156-60}
}
A batch composting study was performed to evaluate the feasibility of co-composting sewage sludge with sodium sulfide and lime (SSL) mixture (Na2S/CaO = l:1), aiming at reducing the availability of heavy metals in the sludge compost. Sewage sludge with sawdust as a bulking agent was amended with SSL at 3% (w/w, dw), and composted for 15 d in laboratory batch reactors. The four stages of the Tessier sequential extraction method was employed to investigate changes in heavy metal fractions of Cu… CONTINUE READING