@article {16419,
	title = {Evolution of heavy metal speciation during the aerobic composting process of sewage sludge},
	journal = {Chemosphere},
	volume = {67},
	year = {2007},
	pages = {1025-1032},
	author = {Yangsheng* Liu and Lanlan Ma and Yaqiong Li and Liting Zheng}
}
