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Aluminium-Pilland Bentonites with Amphoteric Surfactant as a Novel Organoclay for Phosphate Removal  

Kim, Soo-Hong (Department of Civil Engineering, Hanyang University)
Kim, Ja-Keun (Department of Civil Engineering, Hanyang University)
Park, Jae-Woo (Department of Civil Engineering, Hanyang University)
Publication Information
Journal of Korean Society on Water Environment / v.23, no.6, 2007 , pp. 966-972 More about this Journal
Abstract
A novel organoclay has been developed with aluminium-pillared clay modified with an amphoteric surfactant, N-Dodecyl-N,N-dimethyl-3-ammonio-1-propanesulfonate (DDAPS). This novel organoclay is expected to have phosphorus removal capacity as well as organic and inorganic contaminant removal capacity, due to aluminum inside the clay structure. It also exhibited less surfactant desorption than conventional cation surfactant-based organoclays. Phosphorus in water can be decreased from 0.2 mg/L to 0.0012 mg/L in 27 hours with this organoclay. Also, cadmium could removed from water using this proposed organo-clay. Experiments were performed under various pHs and amphoteric surfactants sorption capability was the highest at pH 5 when more of the amphoteric surfactant head group took on positive charges.
Keywords
Aluminium; Amphoteric surfactant; Bentonite; Organoclay; Phosphorus;
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