AWWA JAW57692

Use of ion exchange to remove arsenic (As) fromdrinking water has been viewed skeptically bymany water suppliers, primarily because the costof resin regeneration makes the process uneconomicalwhen the system is operated conventionally. Furthermore,the appeal of ion exchange for treating a varietyof contaminants is frequently limited by the brinerequirements.The novel ion exchange process described herereduces the brine requirements and extends the servicelife of ion exchange beds used for As removal. By modifyingoperation of the ion exchange resins, a largerfraction of their capacity can be devoted to removingAs. At the same time, the brine management system canbe adapted to require much less makeup brine.Results of this study show that the process of ionexchange can be operated more efficiently, making it aviable treatment option for both As and a number ofother contaminants. Water suppliers may want to takeanother look at ion exchange to determine whether theprocess can meet their treatment objectives at reasonablecosts. Includes 17 references, figures.

Product Details

Edition:

Vol. 95 - No. 3

Published:

03/01/2003

Number of Pages:

9

File Size:

1 file , 310 KB