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Rapid assessment of the latent hazard posed by dissolved mercaptans within aqueous effluent

Villalba, MM, Litchfield, VJ, Smith, RB, Franklin, AM, Lawrence, NS and Davis, J (2008) Rapid assessment of the latent hazard posed by dissolved mercaptans within aqueous effluent. JOURNAL OF HAZARDOUS MATERIALS, 154 (1-3). pp. 444-450. [Journal article]

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DOI: 10.1016/j.jhazmat.2007.10.062

Abstract

The presence of mercaptans (RSH) can usually be detected by their inherent noxious odour but there is a need to quantify the concentration within effluent and hence allow an assessment of the latent hazard to be made prior to disposal. The versatility of using naphthoquinone as a rapid derivatising agent through which to trap such species has been evaluated. The quinone moiety provides a label that can be quantified using colorimetric, electrochemical and chromatographic means and offers a significant advantage over conventional thiol labelling agents. The analytical characteristics of each approach have been investigated and the selectivity, sensitivity and applicability of the reaction system critically assessed for a range of model compounds. The naphthoquinone system has a detection limit in the low micromolar range with little interference from other components common to discharge water with 96% recovery of mercaptopropionate. The reaction to sulfide (HS-) has also been assessed and a disparity in response between the detection methods observed and a possible reaction pathway outlined.

Item Type:Journal article
Keywords:sulfur; sulfide; mercaptan; naphthoquinone; chromatography; analysis
Faculties and Schools:Faculty of Computing & Engineering
Faculty of Computing & Engineering > School of Engineering
Research Institutes and Groups:Engineering Research Institute
Engineering Research Institute > Nanotechnology & Integrated BioEngineering Centre (NIBEC)
ID Code:11901
Deposited By: Professor James Davis
Deposited On:14 Feb 2010 15:17
Last Modified:09 Dec 2015 10:44

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