Environmental pollution is a severe fact that the human faces in the process of development and subsistence. Water pollution and organism contamination are two primary aspects of environmental pollution. It is an important problem that the analysis and treatment of pollutants and heavy metals in particular are studied. This work is divided into two parts: one is concerning sewage treatment and recovery of cadmium( II) from water; another is about the analytical methods of Hg, As, Pb, Cu in traditional Chine...