Immobilization of arsenic and iron from acid drainage waters by using reagent

Olga Saeva, Natalya Abrosimova, Nataliya Yurkevich, Svetlana Bortnikova, Tatyana Kuleshova

    Research output: Contribution to journalConference articlepeer-review

    Abstract

    In the paper the precipitation of arsenic and iron from an acid drainage water of the Berikul mine wastes by using lime milk, NaOH, and Na 2 S were studied. The wastes were stored in the southern part of the Komsomolsk tailings impoundment, near the Komsomolsk settlement (Kemerovo region, Russia). The interaction of natural waters with the wastes produced ultra-acid drainage with a pH of about 2, with arsenic content of 1.3 g/l and iron-6.5 g/l. The results of in situ experiments showed that adding lime milk and sodium hydroxide to drainage increases pH and entails precipitation of iron hydroxides and co-precipitated arsenic. The adding of Na 2 S changes Eh of the solution and recovers of arsenic and iron. In the mineralogical composition of the newly formed mineral phases gypsum, sulfur, kaatialaite, arsenosiderite Ca 3 Fe 4 (AsO 4 )(OH) 6 ×3H 2 O, were found. The study was set the most optimal ratio of reagents by which the arsenic concentration decreased to 0.11 mg/L and iron up to 3.0 mg/L.

    Original languageEnglish
    Pages (from-to)83-90
    Number of pages8
    JournalInternational Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM
    Volume17
    Issue number43
    DOIs
    Publication statusPublished - 1 Jan 2017
    Event17th International Multidisciplinary Scientific Geoconference, SGEM 2017 - Vienna, Austria
    Duration: 27 Nov 201729 Nov 2017

    Keywords

    • Acid mine drainage
    • Arsenic
    • Ferrous sulfates
    • Iron
    • Lime milk
    • Mine tailings
    • Sodium sulfide

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