Dalseong mine(longitude 128°40′21.5″ Latitude 35°46′50.2″) was operated as an underground mine. Significant amount of acid mine water from mine adits has been discharged to small creek around mine area. For evaluation of adsorption characteristics of heavy metals, precipitates were collected from stream bottom in the Dalseong mine. X-ray diffraction analysis showed that consist mainly of schwertmannite and goethite. The purpose of this study is to investigate the characteristics of schwertmannite and goethite from acidic mine drainage and to evaluate their heavy metal adsorption efficiency. The removal of some heavy metals such as As, Cu, and Cd from aqueous solution is studied using a precipitates taken from acid mine drainage. The yellowish brown (Munsell color 8.75YR 5/10) and dark brown (Munsell color 2.5YR 3/8) precipitates that collected from the study area consist mainly of schwertmannite and goethite, respectively. The percentage removal or adsorption capacity of metals depends on the initial concentration and characteristics of adsorbent. Removal efficiency of the adsorbents shows the order for metal ions of As &gt; Cu &gt; Cd. The adsorption efficiency by absorbent of precipitates in low concentration metal aqueous solution were observed 67.00-85.00% for As, 26.24-29.08% for Cd, and 7.67-12.82% for Cu. As the initial concentration of metal ions was increased from 1 to 10 mg/L, adsorption amount of adsorbent increased from 0.29 to 1.29 mg/g of Cu of schwertmannite, and from 0.24 to 1.97 mg/g of goethite.

Adsorption characteristics of As, Cu, and Cd using precipitates from Dalseong Mine, Korea

2019 Spring National Meeting

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