USE OF gamma-POLYGLUTAMIC ACID (gamma-PGA, H-FORM), gamma-POLYGLUTAMATE, OR gamma-POLYGLUTAMATE HYDROGEL FOR REMOVAL OF HEAVY METAL FROM WATER OR WATER SYSTEM, AND DISSOLUTION OF CALCIUM SCALE AND/OR MAGNESIUM SCALE IN WATER OR WATER SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a chelating agent for removing heavy metals from water or a water system, and/or a dissolving agent for removing calcium scale and/or magnesium scale. SOLUTION: In order to remove these materials from water or a water system,γ-polyglutamic acid (γ-PGA, H-form) and/or one or more of its salts (i.e.,γ-polyglutamate Na+form,γ-polyglutamate K+form, andγ-polyglutamate NH4+form) and/orγ-polyglutamate hydrogel are used. COPYRIGHT: (C)2007,JPO&INPIT