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Awual, M. R.; 宮崎 有史; 田口 富嗣; 塩飽 秀啓; 矢板 毅
Chemical Engineering Journal, 291, p.128 - 137, 2016/05
被引用回数:229 パーセンタイル:99.31(Engineering, Environmental)A novel macrocyclic ligand of di-o-benzo-p-xylyl-28-crown-8-ether (DOBPX28C8) was prepared and successfully anchored onto the mesoporous silica for the fabrication of mesoporous hybrid adsorbent (MHA) using direct immobilization approach and serving as an efficient adsorbent for Cs removal. The high amount of K (7.69 mM) was slightly affected the Cs adsorption because the hydration radius of K is close to the Cs than that of the other cation of Na. Also the Cs adsorption efficiency was more higher even in the presence of 1,025 fold K and 1,739 fold Na, respectively. The functional group of DOBPX28C8 ligand embedded onto the mesoporous silica exhibited more conformational freedom, and the benzene ring in para position was consolidated for pai-electron orientation with expanding the ring size of DOBPX28C8 for easy capturing with high selectivity and adsorption ability towards the Cs.
Awual, M. R.; Hasan, M. M.*; Shahat, A.*
Sensors and Actuators B; Chemical, 203, p.854 - 863, 2014/11
被引用回数:176 パーセンタイル:99.19(Chemistry, Analytical)In this study, we designed ligand immobilized mesoporous adsorbent for ultra-trace Pb(II) monitoring and removal from wastewater. This adsorbent exhibited the large surface area-to-volume ratios and uniformly shaped pores in case cavities, and its active sites kept open functionality to taking up Pb(II). The data revealed that the adsorbent was able to detect the ultra-trace Pb(II) ions with high sensitivity and selectivity by charge transfer transduction mechanism. Then the adsorbent proved to have an efficient ability for continuous Pb(II) monitoring and removal even on-site and in situ chemical analyses.