ENVS 4101 : Exam 1 Study Guide
Document Summary
It"s properties and effects depend in the specific chemical speciation: chelating agents, chelation is a special case of complexation in which a ligand bonds in town or more places to a metal ion. When used for water treatment, they sequester calcium ions in a soluble or suspended form. The effect is to reduce the equilibrium concentration of the ca+ ion and prevent the precipitation of calcium carbonate in installations such as water pipes and boilers. When water is softened properly with it, calcium does not form precipitates with soaps or interact detrimentally with detergents: thms, trihalogenmethane (thm) are undesirable byproducts that are formed by the chlorination process of water decontamination and purification. They can react with naturally occurring organic compounds in drinking water to produce harmful chemicals: suspected carcinogen; could be formed in the presence of humic substances during the chlorination of water. The humic substances produces thms by reaction with chlorine.
