Filtration and manganese removal

Hamilton, Geoff, Chiswell, Barry, Terry, John, Dixon, David and Sly, Lindsay (2013) Filtration and manganese removal. Journal of Water Supply: Research and Technology. AQUA, 62 7: 417-425. doi:10.2166/aqua.2013.093


Author Hamilton, Geoff
Chiswell, Barry
Terry, John
Dixon, David
Sly, Lindsay
Title Filtration and manganese removal
Journal name Journal of Water Supply: Research and Technology. AQUA   Check publisher's open access policy
ISSN 0003-7214
1605-3974
Publication date 2013
Sub-type Article (original research)
DOI 10.2166/aqua.2013.093
Volume 62
Issue 7
Start page 417
End page 425
Total pages 9
Place of publication London, United Kingdom
Publisher I W A Publishing
Collection year 2014
Language eng
Formatted abstract
Manganese removal through a filter bed is generally carried out and accepted by practitioners and researchers as occurring through catalytic oxidation at the surface of MnO2 coated media, although manganese passage through a coated media filter has been little investigated. To better understand the kinetics of Mn removal through a naturally coated filter, a pilot plant consisting of four filter columns packed with various sand and coal media was used to investigate manganese removal using different chlorine species, viz. chlorine, calcium hypochlorite and sodium hypochlorite, in water of pH 6.6–8.0. Outcomes of the investigation were a clearly observed association of the bulk of Mn removed with the build-up of carbonaceous material in the filter column, and the observation that while Mn was removed through the filter column, 75–85% of such removal took place in the top 20–40 mm of the media column of 0.9–1.0 m overall depth. This investigation suggests that commonly held beliefs regarding the design of catalytic filters should be revisited and the actual removal mechanisms contributing to the overall removal be reassessed. Considerable savings in operation/pre-conditioning of filters may be possible with an improved understanding of the Mn removal through the filter column.
Keyword Catalysis
Chlorine
Filtration
Greensand
Manganese removal
Drinking-water treatment
Filter media
Desorption
Oxidation
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Sun, 17 Nov 2013, 00:27:14 EST by System User on behalf of National Res Centre For Environmental Toxicology