Simultaneous sorption of aqueous phenanthrene and phosphate onto bentonites modified with AlCl3 and CTMAB

2007, Volume 1, Issue 1

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Frontiers of Environmental Science & Engineering >> 2007, Volume 1, Issue 1 doi: 10.1007/s11783-007-0015-3

Simultaneous sorption of aqueous phenanthrene and phosphate onto bentonites modified with AlCl3 and CTMAB

Key Laboratory of Pollution Remediation and Ecosystem Health of Ministry of Education, Department of Environment Science, Zhejiang University, Hangzhou 310028, China;

Available online: 2007-03-05

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Abstract

The purpose of this work is to synthesize a new type of bentonite sorbent that can simultaneously remove both organic compounds and phosphate from water. Inorganic-organic bentonites (Al-CTMAB-Bent) were synthesized by modifying bentonites with both AlCl3 and cetyltrimethyl ammonium bromide (CTMAB). Simultaneous sorption of aqueous phenanthrene and phosphate onto Al-CTMAB-Bent was examined. Removal rates of phenanthrene and phosphate from water reached 96.3% and 90.2%, respectively, at their respective initial concentrations of 1 mg/L and 5 mg/L and the added amount of Al-CTMAB-Bent was 1.25 g/L. The residual turbidity of the Al-CTMAB-Bent suspension decreased 81.4% compared to that of organobentonite suspension after a 1 h settling time. Thus, inorganic-organic bentonite can be used to treat wastewater containing both organic pollutants and phosphate.

Keywords

phenanthrene ; settling ; respective ; residual turbidity ; Inorganic-organic

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