Inhibition of CaCO_3 Scaling in Reverse Osmosis System by Zinc Ion  

作　　者：杨庆峰 

机构地区：[1]School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

出　　处：《Chinese Journal of Chemical Engineering》2006年第2期178-183,共6页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China (No.20306015) and the Scientific Research Foundation of theState Education Ministry for Returned Overseas Chinese Scholars (No.[2003]406).

摘　　要：Scaling of reverse osmosis (RO) membrane surface is one of the main problems in desalination proc- esses. To mitigate scales, organic anti-scalants are often used. If the dosages of anti-scalants are reduced, by using other much cheaper scale inhibitors, RO running cost will decrease greatly. The present paper investigated the inhi- bition of CaCO3 precipitation by zinc ions in RO system. The results show that the zinc ion concentration of 2mg?L-1 was able to exert a marked suppression effect on both bulk precipitation of CaCO3 and on membrane scaling on waters of moderate hardness.Scaling of reverse osmosis （RO） membrane surface is one of the main problems in desalination processes. To mitigate scales, organic anti-scalants are often used. If the dosages of anti-scalants are reduced, by using other much cheaper scale inhibitors, RO running cost will decrease greatly. The present paper investigated the inhibition of CaCO3 precipitation by zinc ions in RO system. The results show that the zinc ion concentration of 2mg·L^-1 was able to exert a marked suppression effect on both bulk precipitation of CaCO3 and on membrane scaling on waters of moderate hardness.

关 键 词：reverse osmosis DESALINATION scaling inhibition metal impurities 

分 类 号：O647.3[理学—物理化学]