Main Title |
Chemical Oxidation for Arsenic Removal. |
Author |
T. R. Holm ;
S. D. Wilson
|
CORP Author |
Midwest Technology Assistance Center (MTAC), Champaign, Illinois.; Illinois State Water Survey Div., Champaign.; Environmental Protection Agency, Chicago, IL. Region V. |
Year Published |
2006 |
Report Number |
MATC-TR06-05; EPA-X829218-01; ISWS-CR-2006-10 |
Stock Number |
PB2009-103957 |
Additional Subjects |
Arsenic ;
Oxidation ;
Water treatment ;
Illinois ;
Portable water ;
Filtration ;
Potassium permanganate ;
Contamination ;
Iron ;
Treatment facilities ;
Sodium hypochlorite ;
Water utilities ;
Maximum contaminant level(MCL)
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB2009-103957 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
22p |
Abstract |
The effects on arsenic (As) removal at iron removal water treatment plants of two common chemical oxidants, potassium permanganate (KMnO4) and sodium hypochlorite (NaOCl), and ferric chloride (FeCl3) were characterized. On-site and laboratory experiments were performed using water from three Illinois water utilities whose potable water exceeds the As maximum contaminant level (MCL) of 10 mg L-1. Aeration, the most common iron removal process, was used as a point of reference. In all cases arsenic removal was improved (compared to aeration) by KMnO4 or NaOCl addition. Aeration had little effect on arsenic speciation; the proportions of As(III) and As(V) were essentially the same before and after aeration. Both KMnO4 and NaOCl oxidized As(III) to As(V). However, the KMnO4 dose depended only on the iron (Fe) concentration. On the other hand, NaOCl also reacts with ammonium (NH4 +) and the NaOCl dose depended on both Fe and NH4 + concentrations. Arsenic removal depended strongly on the Fe to As ratio with the best As removal at Fe to As values above 50. For the utility with the lowest As and highest Fe concentrations, oxidant addition alone was sufficient to satisfy the MCL. For the other two utilities both oxidant and FeCl3 had to be added to meet the MCL. |
Supplementary Notes |
See also PB89-104830. Prepared in cooperation with Illinois State Water Survey Div., Champaign. Sponsored by Environmental Protection Agency, Chicago, IL. Region V. |
Availability Notes |
Also available on CD-ROM. Product reproduced from digital image. Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA. |
PUB Date Free Form |
2006 |
Category Codes |
68D; 50B; 99B |
NTIS Prices |
PC A03/MF A03 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
010500740 |
Origin |
NTIS |
Type |
CAT |