Oxidation cerium recovery manner from oxidation cerium abrasives foul solution for optical grinding and non-polluting conversion treatment manner null of oxidation cerium abrasives foul solution for optical grinding

摘要

PROBLEM TO BE SOLVED: To provide a method for recovering cerium oxide from the waste liquid of a cerium oxide polishing agent for optical polishing and a non-polluting treatment method for the waste liquid of the cerium oxide polishing agent for optical polishing which are efficient, are low in a treatment cost, save labor and are extremely high in practicable value.;SOLUTION: An alkaline component is added into the waste water of the cerium oxide polishing agent to regulate the waste liquid to an alkaline solution of a pH 7 to 11, and after the zeta potential of the waste liquid is changed to -25 to -70 mV, the cerium oxide components are subjected to separation treatment as well as other solid components to separation treatment.;COPYRIGHT: (C)2002,JPO