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AuthorStanford C.A.
AuthorKhraisheh M.
AuthorAl Momani F.
AuthorAlbadarin A.B.
AuthorWalker G.M.
AuthorAl Ghouti M.A.
Available date2022-04-25T08:00:17Z
Publication Date2020
Publication NameEmergent Materials
ResourceScopus
Identifierhttp://dx.doi.org/10.1007/s42247-020-00083-4
URIhttp://hdl.handle.net/10576/30302
AbstractThe adsorption of humic substances on three different adsorbents was investigated and adsorption isotherms were applied in this research. The three adsorbents studied include granular activated carbon (GAC), ferric oxihydroxide in its beta form (β-FeOOH) and iron-coated activated alumina (AAFS). Physical and chemical characteristics of the adsorbents were also fully investigated. Calcium was added to the HS solution in order to represent water with a hardness equivalent to water hardness typically found in London (UK). The examination of the GAC indicated a large microporous area with lower surface area associated with meso- and macropores. The AAFS and β-FeOOH did not present any microporous area. The overall surface area was high for GAC (980 m2 g−1) but lower for AAFS (286 m2 g−1) and β-FeOOH (360 m2 g−1). The Freundlich isotherm model was fitted to all adsorbent–adsorbate systems. It was shown that GAC offered a large adsorption capacity for removal of low molecular weight humics F1 (MW 0–5 kDa) but not for substances with molecular weight larger than 10 kDa (F3). The β-FeOOH adsorption capacity was only 0.43 mg g−1, compared with 9.11 and 2.55 mg g−1 on GAC and AAFS, respectively. On the contrary, F1 is not well adsorbed and only F2 (5–10 kDa) can be efficiently removed by AAFS and β-FeOOH. It was strongly suggested that precipitation/condensation occurred on the adsorbent surface.
SponsorQatar University
Languageen
PublisherSpringer Nature
SubjectActivated alumina
Adsorption
Drinking water
Ferric oxides
Humic acids
TitleUse of nanoadvanced activated carbon, alumina and ferric adsorbents for humics removal from water: isotherm study
TypeArticle
Pagination841-856
Issue Number6
Volume Number3
dc.accessType Abstract Only


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