Please use this identifier to cite or link to this item:
|Title:||Performance of organosilane functionalized diatomaceous earth microparticles in removal of mercury from water|
|Citation:||Proceedings of CHEMECA 2011: Engineering a Better World, held in Sydney, 18-21 September 2011: pp.2187-2195|
|Conference Name:||CHEMECA (39th : 2011 : Sydney, Australia)|
|Yang Yu, Jonas Addai-Mensah, Dusan Losic|
|Abstract:||Natural diatomaceous earth (DE) particles functionalized with 3- mercaptopropyltrimethoxysilane (MPTMS) with specific selectivity for heavy/noble metals have been prepared used as enhanced metal ion adsorbent. Fourier Transform Infrared Spectrometry (FTIR) analysis of the mercapto-DE products revealed that the functional group (-SH) was successfully introduced to the adsorbent surface. Studies involving the removal of Hg(II) ions from aqueous solutions by pristine and MPTMS modified DE products indicated strong initial metal ions concentration and pH dependency. The Hg(II) adsorption kinetics and adsorption isotherms for the MPTMS modified DE particles for Hg(II) observed to follow a pseudo-second-order reaction model and Langmuirian behaviour, respectively. The adsorption reached equilibrium within 60 min with a maximum adsorption capacity of 185 mg·g-1, corresponding to 92 % Hg(II) recovery from 1 mg·dm-3 Hg(II) solution with an adsorbent dosage of 0.25 g (DE)/l. The results show that with further optimisation, a cost effective new and environmentally benign mercapto-DE based adsorbent suitable for removing metals from aqueous solutions can be produced.|
|Keywords:||diatomaceous earth; silane; 3-mercaptopropyltrimethoxysilane; MPTMS; mercury removal|
|Rights:||Copyright status unknown|
|Appears in Collections:||Chemical Engineering publications|
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.