Adsorption of lead from water by thiol-functionalized SBA-15 silicas

Phuong Tran Thi Thu, Tam Truong Thanh, Hung Nguyen Phi, Sung Jin Kim, Vien Vo

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Thiol-functionalized mesoporous silicas have been synthesized by co-condensation of tetraethoxysilane and varying contents of 3-mercaptopropyltrimethoxysilane in acidic medium with the block copolymer Pluronic 123 as a structure directing agent. Adsorption of lead in aqueous solution on the synthesized materials has been investigated. The adsorption data are fitted to Langmuir isotherms and a maximum adsorption capacity calculated from the Langmuir equation can reach 0.19 mmol of Pb/g. The stoichiometric ratio of S: Pb being 1:1 has been obtained for every adsorbent. The effect of the pH on lead adsorption, and desorption of lead on the lead-loaded materials have been studied.

Original languageEnglish
Pages (from-to)2952-2957
Number of pages6
JournalJournal of Materials Science
Issue number11
StatePublished - Jun 2010

Bibliographical note

Funding Information:
Acknowledgement Financial support from the National Foundation for Science and Technology Development (NAFOSTED, 104.03.06. 09) is gratefully acknowledged.


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