Monitoring long-chain intermediate products from the degradation of linear alkylbenzene sulfonates in the marine environment by solid-phase extraction followed by liquid chromatography/ionspray mass spectrometry
Article Abstract:
A study aimed at investigating the levels of degradation of linear alkylbenzene sulfonates (LAS) in the marine environment through the utilization of solid-phase extraction and liquid chromatography/ionspray mass spectrometry (LC-MS) is presented. The experiment employed solid-phase extraction on 250 mL water samples from the Bay of Cadiz, Spain. Liquid chromatography was then instituted on the samples with flouorescence, diode array, and ionspray mass spectrometry. It is found out that the continued presence of long-chain SPC indicates a slow biodegradation of LAS in a highly contaminated and oxygen-deficient marine environment.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1997
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Seawater as auxiliary reagent in dual-temperature ion-exchange processing of acidic mine waters
Article Abstract:
A study aimed at investigating the regeneration of a carboxylic ion exchanger in the form of mine water metal ions with natural seawater is presented. Research also determined the conditions for concentrating copper from acidic mine water by reagentless dual temperature ion-exchange. The experiment utilized dual-temperature ion-exchange concentrations of Cu2+ from acidic mine water, and acrylic resin Lewatit R 250-K and seawater as auxiliary reagent. The results of the experiment indicate that seawater can be ideally used as auxiliary reagent.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1997
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Reaction of ozone with ethene and its methyl- and chlorine-substituted derivatives in aqueous solution
Article Abstract:
The use of the stopped-flow technique, coupled with a fast conductometric detection system, established the intermediates formed when ozonation of drinking water contaminated with chlorinated olefins is performed. The reactions are based on the density of the carbon to carbon double bonds and follows the Criegee mechanism that cleaves the olefin into a carbonyl compound and a hydroxyhydroperoxide.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1998
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