Low cost arsenic removal from aqueous solution by adsorption | Uklanjanje arsena iz vode adsorpcijom na nekonvencionalnim materijalima
2011
Jovanović, B., Građevinski fakultet, Beograd (Serbia) | Ljubisavljević, D., Građevinski fakultet, Beograd (Serbia) | Rajaković, Lj., Tehnološko–metalurški fakultet, Beograd (Serbia)
This paper deals with arsenic removal from water by adsorption with unconventional materials: natural materials (zeolite, bentonite, sepiolite, limonite, pyrolusite), waste materials (waste iron slag, waste sand filter) and modified materials (neutralized waste iron slag, iron(III)-hydroxide coated sand and activated carbon). Under the same conditions are investigated commercial sorbents to compare results. Arsenic removal by adsorption with unconventional materials is investigated in the batch reactor. The best results in batch reactor are obtained with waste materials. Waste iron slag and waste filter sand exhibited equilibrium sorption capacities of 50 microg/g and 30 microg/g, respectively, which is nearly equal to values obtained for the commercial sorbents. Due to the high content of CaO waste iron slag increases significantly water pH (pH=11). In order to minimize its deteriorating impact on the initial water quality, the waste iron slag was neutralized. The new, modified waste iron slag exhibited the highest sorption capacity, 55 microg/g.
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