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Usage of Chelator in Water Treatment
Abstract
Chelation refers that a number of coordination atoms in one organic molecule coordinate with the central atom, and forms annular coordination compounds. These ligands, which are often organic compounds, are called chelants, chelators, chelating agents, or sequestering agent. Chelating agents form multiple bonds with a single metal ion. Chelants, according to ASTM-A-380, are "chemicals that form soluble, complex molecules with certain metal ions, inactivating the ions so that they cannot normally react with other elements or ions to produce precipitates or scale." The ligand forms a chelate complex with the substrate. The term is reserved for complexes in which the metal ion is bound to two or more atoms of the chelant.
Chelator is more stable than common complex. The ligands that can form chelating agent is called integration. Chelating agents includes two types, inorganic and organic. They has an important purpose in the washing process. There are many organic compounds which can chelate with heavy metal ions, such as multiple organic phosphonic acid and polycarboxylate.
Keywords: Chelation chelants chelators chelating agents
Usage of Chelator in Water Treatment