Dithiocarbamates which are a versatile

Dithiocarbamates, which are a versatile class of mono–anionic 1,1-dithio ligands, can coordinate with transaction metals strongly. Thus, their stabilization abilities on heavy metals have been studied by several researchers. Hou et al. [20] discussed the immobilizing effect of dithiocarbamates (DTCs) on mercury(II) as well as the effect of four heavy metals ions (Cu2+, Pb2+, Ni2+ and 'Romidepsin' Zn2+) on DTCR Hg2+ Romidepsin efficiency and Hg2+ reduction. The results demonstrated that DTCR can precipitate Hg2+ well, and the heavy metal ions inhibited Hg2+ precipitation. Jiang et al. [19] synthesized one heavy metal chelating agent by the reaction of polyamine (or polyethylene imine) and CS2, and discussed its stabilization effect on such heavy metals as Pb, Cr, Zn, Cu, and so on. The results revealed that this agent can stabilize heavy metals more effectively than inorganic stabilization chemicals such as sodium sulfide and lime. Fu et al. [21] demonstrated the precipitation ability of one new dithiocarbamate–type compound (HTDC) on Cu2+. The results indicated that HTDC could bind with Cu2+ effectively in CuEDTA wastewater by the formation of insoluble coordination supermolecular polymer (Cu3(HTDC)2)n.