Abstract
The gamma-polyglutamic acid (gamma-PGA) is a homopolyamide composed of D- and L- glutamic acid units. This is an anionic biopolymer that has properties as solubility in water, a toxicity to the environment, addition of edible, and biodegradable. Because of these properties, has many environmental applications, among them, used as coagulants in water treatment. The c-polyglutamic acid is p…