HEXAVALENT CHROMIUM REDUCTION AGENT AND METHOD FOR TREATING HEXAVALENT CHROMIUM

摘要

PROBLEM TO BE SOLVED: To provide a hexavalent chromium reduction agent capable of securely reducing hexavalent chromium into trivalent chromium and further inexpensively suppressing the treatment cost of the hexavalent chromium.SOLUTION: Provided is a hexavalent chromium reduction agent comprising: a lignin sulfonate; and a strong base material.