• AWWA JAW69263

AWWA JAW69263

Journal AWWA - Arsenic Removal Using Oxidative Media and Nanofiltration

American Water Works Association , 12/01/2008

Publisher: AWWA

File Format: PDF

$121.00$243.78


A successful arsenic removal technology must be capable of removing both arsenate and arsenite. Research has shown that low-pressure nanofiltration (NF) membranes remove most of the arsenate but only some of the arsenite. To exploit membrane filtration's ability to remove arsenate, several researchers have suggested that a pretreatment step oxidizing arsenite to arsenate would improve the performance of NF membranes. The current study investigated this hypothesis by assessing the effect of the oxidation step on the arsenic removal performance of two NF membranes and a low-energy reverse osmosis membrane. Because of its inert nature, long life, simple operation, and compatibility with oxidant-sensitive membranes, manganese dioxide was chosen as the companion oxidant for membrane filtration. Results indicated that preoxidation with manganese dioxide significantly enhanced arsenic removal. For treatment facilities using membrane filtration to treat hard or brackish water, manganese dioxide may provide a low-maintenance, cost-effective pretreatment alternative if additional arsenic removal is required to meet the regulatory target of 10 µg/L arsenic. Includes 38 references, tables, figures.

More AWWA Standards PDF

AWWA SOURCES59158

AWWA SOURCES59158

$12.00 $24.00

AWWA WQTC60601

AWWA WQTC60601

$12.00 $24.00

AWWA ACE59936

AWWA ACE59936

$12.00 $24.00

AWWA SOURCES59179

AWWA SOURCES59179

$12.00 $24.00