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Md. Rabiul Awual,M.A. Shenashen,Akinori Jyo,Hideaki Shiwaku,Tsuyoshi Yaita 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.5
We developed a potentially high-performance adsorbent for sustainable treatment of soluble inorganic trace phosphate from water by zirconium(IV) loaded bifunctional fibers. In the presence of common Cl- and SO4 2-, phosphate adsorption was not adversely affected but slightly enhanced due to co-ion and Donnan invasion mechanism. Trace phosphorus (0.0143 mM) was also removed in presence of relatively high amounts of competing anions at high feed flow rate (850 h-1). In competitive arsenate and phosphate adsorption, this novel adsorbent slightly preferred phosphate to arsenate. The adsorbent is reversible and keeps remaining functionality to further reuse in many cycles.
Ultra-trace copper(II) detection and removal from wastewater using novel meso-adsorbent
Md. Rabiul Awual,Mohamed Ismael,Md. Abdul Khaleque,Tsuyoshi Yaita 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4
The functionalized mesoporous silica based meso-adsorbent was developed for ultra-trace Cu(II) detection and removal from wastewater. The meso-adsorbent was fabricated by direct immobilization of N,N-bis(salicylidene)1,2-bis(2-aminophenylthio)ethane onto mesoporous silica monoliths. The calcu-lated HOMO–LUMO small energy gap suggested that the electrons excitation according to the electron/energy transfer mechanism was evident in the intense of color complexation during selective detection and removal. The adsorbent was successfully applied in the determination and removal of Cu(II) ions in environmental samples. Therefore, the meso-adsorbent has been shown to have the potential to be used as an effective adsorbent for trace Cu(II) capturing from wastewater.