Kim, MJ Ahn, KH Jung, YJ 2024-01-21T10:04:30Z 2024-01-21T10:04:30Z 2021-09-01 2002-10 0045-6535 https://pubs.kist.re.kr/handle/201004/139191 The main objective of the present study is to determine arsenic species in mine tailings by applying an ion exchange method. Three abandoned mines, Jingok, Cheonbo and Sino mines in Korea, which had produced mainly gold, were selected for the collection and analysis of the tailings. It was found that the arsenic speciation using an ion exchange method was effective to separate As(III) and As(V) in leachate of mine tailings. The concentration of As(V) was found to be 63-99% in the leachate, indicating that As(V) would be the major arsenic species in the mine tailings and the tailings were under oxic conditions. The total concentrations of arsenic and metal elements in the mine tailings were up to 62 3 50 mg/kg As, 40 wt.% Fe, 21400 mg/kg Mn, and 7850 mg/kg Al. Sulfate was the dominant anion throughout the leachate, reaching a maximum dissolved concentration of 734 mg/l. The results of XRD and SEM in the mine tailings showed that main arsenic-containing minerals were pyrite (FeS2) and arsenopyrite (FeAsS) which would be the source of arsenic contamination in the study area. (C) 2002 Elsevier Science Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD CONTAMINATED SOIL SEDIMENT SAMPLES SPECIATION GROUNDWATER Distribution of inorganic arsenic species in mine tailings of abandoned mines from Korea Article 10.1016/S0045-6535(02)00307-7 1 CHEMOSPHERE, v.49, no.3, pp.307 - 312 CHEMOSPHERE 49 3 307 312 scie scopus 000178119600010 2-s2.0-0036712218 Environmental Sciences Environmental Sciences & Ecology Article CONTAMINATED SOIL SEDIMENT SAMPLES SPECIATION GROUNDWATER arsenic speciation ion exchange method mine tailings abandoned mine