DOIONLINE 
DOIONLINE Publish In |
International Journal of Advances in Science, Engineering and Technology(IJASEAT)-IJASEAT |
 Journal Home Volume Issue |
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Issue |
Volume-3, issue-4, Spl. Iss-3 ( Oct, 2015 ) | |||||||||
Paper Title |
Synthesis And Characterization Of Titanosilicate Compounds For Pb (Ii) Removal | |||||||||
Author Name |
W. Moonkambil, P. Opaprakasit, J. Sumranjit, P. Sreearunothai | |||||||||
Affilition |
Thailand Advanced Institute of Science and Technology (TAIST-Tokyo tech), Sirindhorn International Institute of Technology (SIIT), Thammasat University, Pathum Thani, 12121, Thailand School of Bio-Chemical Engineering and Technology, Sirindhorn International Institute of Technology (SIIT), Thammasat University, Pathum Thani, 12121, Thailand The National Nanotechnology Center (NANOTEC), Pathum Thani, 12120, Thailand | |||||||||
Pages |
68-73 | |||||||||
Abstract |
Lead (Pb) is considered a highly toxic element to both human and environment. In this study, titanosilicate (TSi) compounds were synthesized and tested for removal of lead (Pb). The TSi sorbent was synthesized using sol-gel synthesis of titanium (IV)-isopropoxide (TiPO) and tetraethylorthosilicate (TEOS) mixed together with sodium hydroxide at various onditions. The adsorbents were characterized for their morphology and phases using scanning electron microscope and X-ray diffraction (XRD). The maximum Pb(II) adsorption capacities of the sorbents obtained are very high and in the range of 300- 400 mg Pb /g sorbent. By analyzing the ratio of the released sodium ion from the sorbent to the ratio of the adsorbed Pb(II), the Pb(II) removal mechanisms are inferred to be mainly the ion-exchange. X-ray diffraction patterns show that the synthesized sorbents are mostly in the amorphous to the semi-crystalline phases. The sorbent in the semi-crystalline state was prepared by the sol-gel synthesis followed by hydrothermal treatment at 200°C for 6h and has the highest adsorption capacity. Further increase in hydrothermal time resulted in sorbent with crystalline structure, however, the sorption performance was reduced. Keywords- Titanosilicate, Lead, Adsorption | |||||||||
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