title: Sorption of lead ions on diatomite and manganese oxides modified diatomite.
abstract: 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.
authors.affiliation: School of Chemical Engineering, The Queen's University of Belfast, UK.
authors.forename: Y
authors.initials: Y
authors.lastname: Al-Degs
authors.forename: M A
authors.initials: MA
authors.lastname: Khraisheh
authors.forename: M F
authors.initials: MF
authors.lastname: Tutunji
mesh_terms: D000327:Adsorption; D007692:Diatomaceous Earth / Q000737:chemistry*; D005374:Filtration; D006863:Hydrogen-Ion Concentration; D007164:Immunosorbents / Q000737:chemistry*; D007854:Lead / Q000737:chemistry*; D017895:Manganese Compounds / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D010087:Oxides / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D007164:Immunosorbents; D017895:Manganese Compounds; D010087:Oxides; D007854:Lead; D007692:Diatomaceous Earth; C027424:manganese oxide; C033787:diatomite