TY - JOUR

T1 - Immobilization of arsenic and iron from acid drainage waters by using reagent

AU - Saeva, Olga

AU - Abrosimova, Natalya

AU - Yurkevich, Nataliya

AU - Bortnikova, Svetlana

AU - Kuleshova, Tatyana

PY - 2017/1/1

Y1 - 2017/1/1

N2 - 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.

AB - 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.

KW - Acid mine drainage

KW - Arsenic

KW - Ferrous sulfates

KW - Iron

KW - Lime milk

KW - Mine tailings

KW - Sodium sulfide

UR - http://www.scopus.com/inward/record.url?scp=85063092766&partnerID=8YFLogxK

U2 - 10.5593/sgem2017H/43/S18.011

DO - 10.5593/sgem2017H/43/S18.011

M3 - Conference article

AN - SCOPUS:85063092766

VL - 17

SP - 83

EP - 90

JO - International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM

JF - International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM

SN - 1314-2704

IS - 43

T2 - 17th International Multidisciplinary Scientific Geoconference, SGEM 2017

Y2 - 27 November 2017 through 29 November 2017

ER -