ABSTRACT
With the development of the sustainable development theory and application, the environment friendly heavy metal passivating materials are more and more pay attention. Yamamoto Ryoichi brought the concept of “environmental material” in early 1990s, who contended that environmental material should be a kind of material with maximum performance and minimum environmental load. At present, heavy metal passivating agents mainly include clay mineral, phosphates, zeolite, inorganic mineral, organic composts and microorganism and other environmental materials.
