Emulsion liquid membranes for wastewater treatment: equilibrium models for lead- and cadmium-di-2-ethylhexyl phosphoric acid systems
Article Abstract:
The feasibility of using emulsion liquid membranes for extracting heavy metals from aqueous systems was studied. Experiments were carried out wherein lead and cadmium were extracted from an aqueous solution using coarse emulsions which consist of an organic membrane solvent containing the surfactant and extractant. Predictive models were also developed to take into account the effects of aqueous phase nonidealities and all aqueous phase ionic reactions. Results show that emulsion liquid membranes are highly capable of extracting heavy metal traces from aqueous systems.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1995
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Evaporation of heavy metals during the heat treatment of municipal solid waste incinerator fly ash
Article Abstract:
Evaporation experiments with various atmospheric conditions were conducted for the heat treatment of fly ash in municipal solid waste incineration. The prime targets of the experiment were heavy metals zinc, lead, cadmium and copper. The heavy metals evaporated with time functions and temperature range between 670 and 1300 degrees centigrade. Integration of oxidizing and reducing atmosphere experiments lead to the development of a thermal process that practically removes all heavy metal content of filter ashes.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1995
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Determination of volatile organic compounds in water by solid phase microextraction and infrared spectroscopy
Article Abstract:
A simple and sensitive method for determining volatile organic compounds (VOCs) in water using solid phase microextraction (SPME) and infrared (IR) spectroscopy is described. SPME is used to selectively extract the VOCs from the water, while IR spectroscopy is used to detect the extracted VOCs directly in the Parafilm in the solid phase. SPME-IR is shown to be sensitive in the parts-per-billion range and to have the potential of determining individual VOCs in multicomponent mixtures.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1996
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