AWWA JAW56600

In October 2001, the US EnvironmentalProtection Agency decided to moveforward with implementation of a 10-ug/L standard for arsenic (As) indrinking water. Given this more stringentAs standard, water facilities, especiallysmaller treatment systems, need up-to-dateinformation on the ability of existing treatmenttechnologies to remove As fromdrinking water. A yearlong study was conductedat two ion-exchange (IX) and twoactivated alumina (AA) water treatmentplants in New England to evaluate the performanceof these full-scale systems forconsistently removing As from raw water.The source water contained 34-87 ug/L oftotal As, consisting primarily of As(V),except for one system in which 0.3-28.8ug/L of As(III) was measured. Samplingresults from these real-world conditionsindicated the IX and AA systems couldremove As to < 5 ug/L in the treated water,but only if IX resins were properly regeneratedand AA media were changed out in atimely manner.IX and AA processes offer water suppliersease of operation as well as low operationsand maintenance costs. For small water treatmentfacilities and point-of-entry plants, theyrepresent two appealing options for meetingthe challenges of upcoming regulationrequirements. Includes 43 references, tables, figures.

Product Details

Edition:

Vol. 94 - No. 4

Published:

04/01/2002

Number of Pages:

13

File Size:

1 file , 470 KB