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Awual, M. R.; Khaleque, M. A.*; Ratna, Y.*; Znad, H.*
Journal of Industrial and Engineering Chemistry, 21, p.405 - 413, 2015/01
被引用回数：141 パーセンタイル：97.54(Chemistry, Multidisciplinary)A novel functionalized mesoporous silica based meso adsorbent was prepared for simple, efficient and rapid determination, sorption and recovery of trace palladium(II) in wastewater. The meso adsorbent was prepared by indirect immobilization of ((3(3(methoxycarbonyl)benzylidene)hydrazinyl)benzoic acid) onto the cage pored mesoporous silica. The optimum conditions were measured as a function of solution acidity, contact time, ion selectivity and adsorption isotherms models. The data revealed that meso-adsorbent offered simple and one step procedure without using high tech instruments. The determined detection limit and sorption capacity were 0.11 ppb and 184.50 mg/g, respectively. The meso-adsorbent can be repeatedly recycled without deterioration of the unique mesostructures and maintaining the same functionality for detection/sorption operations in next uses.
Awual, M. R.; Hasan, M. M.*
Journal of Industrial and Engineering Chemistry, 21, p.507 - 515, 2015/01
被引用回数：201 パーセンタイル：98.85(Chemistry, Multidisciplinary)A simple and sensitive method was applied for determination and extraction of trace level palladium(II) in wastewater by using functionalized mesoporous silica based fine tuning mesoporous adsorbent. The adsorbent was stable and easy to detect, adsorb and recover Pd(II) ions by charge transfer complexation mechanism. The optimum experimental conditions such as pH, contact time, initial concentration, selectivity and sensitivity, type and amount of eluent for elution and various ionic interferences on detection and sorption were systematically evaluated. The determined maximum sorption capacity was 191.35 mg/g. The proposed method was applied successfully for extraction of Pd(II) in environmental wastewater samples.
Awual, M. R.
Journal of Industrial and Engineering Chemistry, 20(5), p.3493 - 3501, 2014/09
被引用回数：137 パーセンタイル：97.14(Chemistry, Multidisciplinary)A novel conjugate adsorbent was developed for simultaneous Au(III) detection and recovery from urban mining waste. This adsorbent has the large surface are to volume ratios and uniformly shaped pores in the nanostructures in its cage cavities. Therefore, the conjugate adsorbent permitted to fast and specific Au(III) ions capturing via a colorimetric naked eye visualization based on stable complexation mechanism. The detection limit and sorption capacity of the novel adsorbent at optimum conditions was 0.22 
g/L and 183.42 mg/g, respectively. The design in such novel adsorbent offered a simple procedure for ultra trace Au(III) detection and recover without using highly sophisticated instruments.
Awual, M. R.; Shenashen, M. A.*; 城 昭典*; 塩飽 秀啓; 矢板 毅
Journal of Industrial and Engineering Chemistry, 20(5), p.2840 - 2847, 2014/09
被引用回数：157 パーセンタイル：97.83(Chemistry, Multidisciplinary)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 chloride and sulfate, phosphate adsorption was not adversely affected but slightly enhanced due to coion 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. 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.
Awual, M. R.; Ismael, M.*; Khaleque, M. A.*; 矢板 毅
Journal of Industrial and Engineering Chemistry, 20(4), p.2332 - 2340, 2014/07
被引用回数：177 パーセンタイル：98.35(Chemistry, Multidisciplinary)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 ligand onto mesoporous silica monoliths. The calculated 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.
