Sorption of lead ions on diatomite and manganese oxides modified diatomite

Naturally occurring diatomaceous earth (diatomite) has been tested as a potential sorbent for Pb(II) ions. The intrinsic exchange properties were further improved by modification with manganese oxides. Modified adsorbent (referred to as Mn-diatomite) showed a higher tendency for adsorbing lead ions...

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Bibliographic Details
Published in:Water research (Oxford) 2001-10, Vol.35 (15), p.3724-3728
Main Authors: Al-Degs, Y, Khraisheh, M.A.M, Tutunji, M.F
Format: Article
Language:English
Subjects:
Adsorption
adsorption and filtration
Applied sciences
diatomaceous earth (diatomite)
Diatomaceous Earth - chemistry
Exact sciences and technology
Filtration
Hydrogen-Ion Concentration
Immunosorbents - chemistry
Industrial wastewaters
Lead - chemistry
Manganese Compounds - chemistry
manganese oxides
Microscopy, Electron, Scanning
Oxides - chemistry
Pollution
Wastewaters
Water Purification - methods
Water treatment and pollution
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Summary:Naturally occurring diatomaceous earth (diatomite) has been tested as a potential sorbent for Pb(II) ions. The intrinsic exchange properties were further improved by modification with manganese oxides. Modified adsorbent (referred to as Mn-diatomite) showed a higher tendency for adsorbing lead ions from solution at pH 4. The high performance exhibited by Mn-diatomite was attributed to increased surface area and higher negative surface charge after modification. Scanning electron microscope pictures revealed a birnessite structure of manganese oxides, which was featured by a plate-like-crystal structure. Diatomite filtration quality was improved after modification by manganese oxides. Good filtration qualities combined with high exchange capacity emphasised the potential use of Mn-diatomite in filtration systems.
ISSN:0043-1354
1879-2448
DOI:10.1016/S0043-1354(01)00071-9