Titel: Studies on separation of heavy metals from acidic solutions by foam fractionation with respect to an application on acidic soil extracs
Sprache: Englisch
Autor/Autorin: Wömmel, Simone
Calmano, Wolfgang
Schlagwörter: heavy metals;foam fractionation;soil extract;hexamethylenedithiocarbamate;surfactants
Erscheinungsdatum: 1992
Quellenangabe: Acta hydrochimica et hydrobiologica 20 (1992), H. 5, S. 265-8
Zusammenfassung (englisch): An experimental investigation is presented on the batch foam fractionation of the heavy metal cations Pb2+, Cd2+, Cu2+, Sb3+ and As5+ from diluted aqueous solutions with hexamethylenedithiocarbamate (HMDC) as complexing agent and sodiumdodecylsulfate (SDS) as surfactant. Among the considered pH-values of 2, 4 and 7 the pH 2 experiments allow a direct application of foam fractionation on acidic extracts from heavy metal contaminated soil. The experiments at pH 2 and pH 4 show better results than those at neutral pH. Although a simple device was used, a maximum enrichment factor of 13.8 and a minimum removal factor of 0.01 have been measured. The flotation with weak organic acids like citric acid (CA) and acetic acid (AA) show about 50-70% smaller enrichment factors than those acidified with hydrochloric acid. The dissolution and mixing of the reacting components as well as the concentration of the detergent and the gaseous volume flow can be regarded as basic parameters of foam fractionation.
URI: http://tubdok.tub.tuhh.de/handle/11420/448
URN: urn:nbn:de:gbv:830-tubdok-5219
DOI: 10.15480/882.446
Institut: Umwelttechnik und Energiewirtschaft V-9
Environmental Technology and Energy Economics V-9
Dokumenttyp: (wissenschaftlicher) Artikel
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