Use of fly ash agglomerates for removal of arsenic.
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.
Polowczyk
Izabela
I
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
Bastrzyk
Anna
A
Koźlecki
Tomasz
T
Sawiński
Wojciech
W
Rudnicki
Piotr
P
Sokołowski
Adam
A
Sadowski
Zygmunt
Z
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
D060729:Coal Ash; D052638:Particulate Matter; D014874:Water Pollutants, Chemical; D014867:Water; D002244:Carbon; D001151:Arsenic
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