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Awual, M. R.; Hasan, M. M.*; Znad, H.*
Chemical Engineering Journal, 259, p.611 - 619, 2015/01
被引用回数：258 パーセンタイル：99.34(Engineering, Environmental)The functional group containing organic ligand was developed and then successfully anchored onto mesoperous silica for the preparation of nano-conjugate adsorbent. After fabrication, the ligand kept open functionality for capturing Pd(II) under optimum conditions. The adsorbent exhibited the distinct color formation after adding the Pd(II) ions both in solid and liquid states. The base metal of Cu(II) and Zn(II) did not hamper the Pd(II) sorption ability of adsorbent in the acidic pH region. Therefore, it was expected that the Pd(II) could be separated from other hard metal ions by the adsorbent. Therefore the proposed adsorbent can be considered as a potential candidate for Pd(II) capturing from waste samples.
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.
