title: Use of fly ash agglomerates for removal of arsenic.
abstract: The aim of this work is to investigate the application of fly ash adsorbent for removal of arsenite ions from dilute solution (100-1,000 ppm). Experiments were carried out using material from the "Turów" (Poland) brown-coal-burning power plant, which was wetted, then mixed and tumbled in a granulator to form spherical agglomerates. Measurements of arsenic adsorption from aqueous solution were carried out at room temperature and natural pH of fly ash agglomerates, in either a shaken flask or circulating column, to compare two different methods of contacting solution with adsorbent. Adsorption isotherms of arsenic were determined for agglomerated material using the Freundlich equation. Kinetic studies indicated that sorption follows a pseudo-second-order model. Preferable method to carry out the process is continuous circulation of arsenite solution through a column.
authors.affiliation: Faculty of Chemistry, Department of Chemical and Process Engineering, Wrocław University of Technology, Norwida 4/6, 50-373 Wrocław, Poland. izabela.polowczyk@pwr.wroc.pl
authors.forename: Izabela
authors.initials: I
authors.lastname: Polowczyk
authors.forename: Anna
authors.initials: A
authors.lastname: Bastrzyk
authors.forename: Tomasz
authors.initials: T
authors.lastname: Koźlecki
authors.forename: Wojciech
authors.initials: W
authors.lastname: Sawiński
authors.forename: Piotr
authors.initials: P
authors.lastname: Rudnicki
authors.forename: Adam
authors.initials: A
authors.lastname: Sokołowski
authors.forename: Zygmunt
authors.initials: Z
authors.lastname: Sadowski
mesh_terms: D000327:Adsorption; D001151:Arsenic / Q000737:chemistry*; D002244:Carbon / Q000737:chemistry*; D060729:Coal Ash; D007700:Kinetics; D052638:Particulate Matter / Q000737:chemistry*; D014867:Water / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*; D014961:X-Ray Diffraction
chemical_list: D060729:Coal Ash; D052638:Particulate Matter; D014874:Water Pollutants, Chemical; D014867:Water; D002244:Carbon; D001151:Arsenic
references.citation: J Hazard Mater. 2008 Nov 30;159(2-3):313-8
references.pmid: 18359154
references.citation: J Hazard Mater. 2006 Apr 17;131(1-3):29-36
references.pmid: 16271283
references.citation: Langmuir. 2004 Aug 3;20(16):6702-9
references.pmid: 15274575
references.citation: J Colloid Interface Sci. 2007 Jun 1;310(1):57-73
references.pmid: 17331527
references.citation: J Hazard Mater. 2005 Feb 14;118(1-3):185-95
references.pmid: 15721543
references.citation: Chemosphere. 2008 Jun;72(3):381-8
references.pmid: 18396313
references.citation: J Hazard Mater. 2007 Apr 2;142(1-2):1-53
references.pmid: 17324507
references.citation: Sci Total Environ. 2004 Sep 1;330(1-3):171-85
references.pmid: 15325167
references.citation: Chemosphere. 2006 Dec;65(11):2377-87
references.pmid: 16872662
references.citation: J Hazard Mater. 2009 May 30;164(2-3):1372-8
references.pmid: 19022572
references.citation: J Hazard Mater. 2005 Dec 9;127(1-3):187-95
references.pmid: 16125307
references.citation: J Colloid Interface Sci. 2006 Oct 15;302(2):458-66
references.pmid: 16920133
references.citation: Waste Manag. 2002;22(2):143-6
references.pmid: 12003141
references.citation: J Hazard Mater. 2008 Apr 1;152(2):486-92
references.pmid: 17826896
references.citation: J Hazard Mater. 2007 Sep 30;148(3):538-47
references.pmid: 17416461