文档介绍：Fluoride adsorption onto a Ce-La binary hydroxide
adsorbent as recovery of ceria glass polishing wastes
Zhang Ping, Ouyang Tong, Chen Shanshan, Li Ruoshuang, Lai Limin
Department of Environmental Science and Technology
Xiamen University
Xiamen 361005, . China
******@xmu.
Abstract—The adsorption of fluoride onto a Ce−La binary waste ceria glass polishing powder are CeO2 and La2O3 [7].
hydroxide adsorbent, herein referred to as CLH adsorbent, was Considering the hydroxide form of both Ce and La exhibit high
studied under various pH values, adsorbent dose, contact time, affinity to a series of anions including fluoride [8, 9], the idea
and the presence of major anions. In the pH range of 4 to 8, the to prepare an innovative adsorbent for the removal of
fluoride adsorption onto CLH reaches a maximum, then hazardous anions by converting the oxide form of Ce and La to
decreases with further increasing of pH. A considerably higher
-1 their hydroxide form is beneficial from both the water
adsorption capacity (− mg g ) was maintained until the purification and waste solid reuse points of view. In our
solution pH was up to pared with that of mercially previous works [7, 10], a Ce−La binary hydroxide adsorbent,
available activated alumina; indicative of the CLH material which had been prepared essfully by converting the oxide
should be