Application of polyglutamic acid or its salt in processing heavy metal in water

Abstract

The invention provides the application of the heavy metal in poly-glutamic acid or salt treating water, which is characterized in that the application includes removing the heavy metal ions in water or water system by poly-glutamic acid or salt or agglutination agent taking poly-glutamic acid as the material in the alkalescence condition. The invention, which expands the application range of poly-glutamic acid and salt as well as agglutination agent containing poly-glutamic acid or salt, effective removes the heavy metal in water or water system by changing the acid-alkali condition of water and water system, and realizes safe discharge of treated water; besides, with simple structure and few poly-glutamic acid and salt, the invention can remove the heavy metal in large-volume water system, and is applicable to remove various heavy metals in industrial water, landscape water and domestic water system.

Description

technical field

[0001] The invention relates to the application of polyglutamic acid or its salts in water treatment, in particular to the application of using polyglutamic acid or its salts to treat water or water systems containing heavy metal ions to remove heavy metal ions. Background technique

[0002] γ-polyglutamic acid (Poly glutamic acid, γ-PGA) and its Na + 、K + , Mg 2+ , Ca 2+ and NH 4 + The salts in various forms are all degradable biopolymers and can be obtained by microbial polymerization. This type of polymer has high safety and biodegradability, and can be safely used in various industrial fields. With the large-scale production of gamma-polyglutamic acid and its salts, it has been widely used as a water purifier. It can be used in various sewage and water systems to effectively coagulate the dirt in the water system. It can be applied not only to fresh water, but also to sea water.

[0003] γ-polyglutamic acid and its salts, compared with the current...

Images