公开(公告)号：US11773028B2

公开(公告)日：2023-10-03

申请号：US17036801

申请日：2020-09-29

Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE

Inventor： Sheng-Min Yu ,  Sheng-Yi Chiu ,  Chien-Chung Hsu

IPC: C04B35/553 ,  C02F1/28 ,  C02F101/14

CPC classification number: C04B35/553 ,  C02F1/281 ,  C02F2101/14 ,  C04B2235/3206 ,  C04B2235/3208 ,  C04B2235/3217 ,  C04B2235/3262 ,  C04B2235/3272 ,  C04B2235/3418 ,  C04B2235/5436 ,  C04B2235/5445 ,  C04B2235/77

Abstract: A method of removing fluoride ion from waste liquid is provided, which includes providing a calcium source and a plurality of ceramic particles to a waste liquid containing fluoride ion for forming a plurality of calcium fluoride layers wrapping the ceramic particles. The calcium fluoride layers are connected to form a calcium fluoride bulk. The ceramic particles are embedded in the calcium fluoride bulk. The ceramic particles and the calcium fluoride bulk have a weight ratio of 1:4 to 1:20.