GUO Jian-xin, TANG Li-hua, WANG Jun-zhe, XU Bo-chang

(Engineering Research Center of Large Scale Reactor Engineering and Technology, East China University of Science and Technology, Shanghai 200237, China)

Abstract：The medical-stone modified by acid, heat or both of them was used to treat drinking water. The impacts of acid concentration, temperature and conditions of composite modification on the dissolution and absorption of medical-stone were researched by studying the differences of Pb, Cu, Mn and Zn ions in the water between before and after treatment by modified medical-stone. Dissolution and absorption break through curve of modified medical-stone were determined. Results show that both heat modification and acid modification can promote ion-exchange properties of the medical-stone. Medical-stone modified by 1.5 mol/L hydrochloric acid firstly, and then modified at 400 ℃ can remove 81.9% of Pb in drinking water and increase the concentration of Zn by 0.132 mg/L. At a flow rate of 200 mL/min, 60 g of modified medical-stone can effectively optimize the water for 8 hours, equilibrium time is about 12 hours.

Keywords：Medical-stone; modification; optimize; drinking water

E-mail：lhtang@ecust.edu.cn

ACTA MINERALOGICA SINICA Vol. 36, No. 3, 2016, Page 387-390