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Removal of arsenic from drinking wat...

Reddy, Pratap Gaddy.

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Removal of arsenic from drinking water by iron oxide coated pumice stone.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Removal of arsenic from drinking water by iron oxide coated pumice stone./
Author:	Reddy, Pratap Gaddy.
Description:	89 p.
Notes:	Source: Dissertation Abstracts International, Volume: 65-11, Section: B, page: 5967.
Contained By:	Dissertation Abstracts International65-11B.
Subject:	Engineering, Environmental. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3151883
ISBN:	9780496122059

Removal of arsenic from drinking water by iron oxide coated pumice stone.
Reddy, Pratap Gaddy.

Removal of arsenic from drinking water by iron oxide coated pumice stone. - 89 p.

Source: Dissertation Abstracts International, Volume: 65-11, Section: B, page: 5967.

Thesis (Ph.D.)--The University of Texas at El Paso, 2005.

This research is aimed at a broad audience of rural populations affected by drinking arsenic-contaminated water. Exposure to arsenic in the drinking water has been associated with the development of skin and internal cancers and non-carcinogenic effects such as diabetes, peripheral neuropathy, and cardiovascular disease (Abernathy et al., 593--597). Traditional technologies to remove arsenic from water include: coagulation and filtration, activate alumina, ion-exchange, reverse osmosis, and electro-dialysis. These methods are very expensive to build and operate in rural areas with scattered populations. The focus of this research was to remove the arsenic from drinking water by a sorption process. Batch studies were conducted on twelve adsorbent materials with water containing 100 mug/L arsenic (V). The outcome of the research indicates that iron-oxide-coated pumice stone (IOCPS) removes both arsenic (III) and arsenic (V). The arsenic (V) appears to be more easily removed than arsenic (III). In a laboratory column test, the breakthrough volume of the iron oxide coated pumice stone was 4000 bed volumes. The concentration of arsenic in the feed water was 100 mug/L and the effluent concentration was below detection limit (<2 mug/L). Optimum empty bed contact time for arsenic (V) removal by the iron oxide coated pumice stone was 8 to 10 minutes. The optimum pH for arsenic removal by IOCPS was found to be in the range of 5.5 to 6.0. The presence of sulfate, chloride, nitrite, nitrate, and phosphate in the water reduces the arsenic removal capacity of iron-oxide-coated pumice stone. Presence of calcium, magnesium in the water does not effect the arsenic removal by iron oxide coated pumice stone. The residual waste is non-hazardous and can be disposed in landfills.

ISBN: 9780496122059Subjects--Topical Terms:

783782
Engineering, Environmental.

Removal of arsenic from drinking water by iron oxide coated pumice stone.
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