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Title of Journal: Chin Sci Bull

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Abbravation: Chinese Science Bulletin

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SP Science China Press

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DOI

10.1002/adma.200590003

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1861-9541

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Dechlorination of 24dichlorophenol by nickel nan

Authors: Li Feng XiaoPeng Ge Yi Li DongSheng Wang HongXiao Tang
Publish Date: 2011/06/30
Volume: 56, Issue: 21, Pages: 2258-2266
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Abstract

Metal nanoparticles are effective for remediation of contamination with a range of compounds including chlorinated organics However the sorption process of the passivation oxide layers on the metal nanoparticle surfaces may result in incomplete degradation of contaminants This phenomenon can be prevented by an acidic washing procedure or reaction in an acidic medium In this paper nickel nanoparticles manufactured via the carbonyl powder process were analyzed using scanning electron microscopy transmission electron microscopy Xray diffraction and energydispersive Xray spectroscopy The sorption and degradation of 24dichlorophenol 24DCP by nickel nanoparticles under acidic conditions was then investigated Transmission electron microscopy and XRD results showed that the nickel nanoparticles range in size from 10 to 20 nm and a thin passivation layer of NiO is present on the surface This oxide layer can be removed by pretreatment washing with acidic solutions It was indicated that dechlorination was the key reaction pathway for degradation of 24DCP by nickel nanoparticles under acidic conditions The main degradation products were 4Chlorophenol 2Chlorophenol and Phenol and among these Phenol was dominant The acidic medium promoted degradation by providing an appropriate pH and H+ may be involved in the reaction Dechlorination of 24DCP by nickel nanoparticles under the acidic condition follows the second order kinetic model and the rate constants at 298 306 316 K are 002 02 and 03 g L h−1 respectivelyThis article is published under an open access license Please check the Copyright Information section for details of this license and what reuse is permitted If your intended use exceeds what is permitted by the license or if you are unable to locate the licence and reuse information please contact the Rights and Permissions team

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