A Study on the Characteristics of Cement-Solidified Abandoned Tailings Specimens

Seo, E.T.; Min, Kyoung-Won; Lee, Hyun-Cheol

doi:10.12972/ksmer.2012.49.6.757

Cited by 1 publication

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…산성광산배수는 광산주변 수계를 오염시키기 때문에 중화침전법 혹은 자연정화법으로 수처리를 하고 있다. 능동적 정화방법 중 한가지인 중화침전법 이외에도 전기 화학적 농축, 생물학적 정화와 산화, 환원 조절(황산염 환원), 이온교환과 흡착, 응집 또는 여과, 고형화 등의 물 리적, 화학적, 생물학적인 방법을 이용하여 산성광산배 수를 처리하는 방법으로 국내에서도 연구가 계속되고 있 다 (Cheong and Kang, 2004;Kim et al, 2011;Seo et al, 2012;Lee et al, 2013). 중화침전법은 중화제를 이 용하여 pH를 방류수 수질 기준으로 바로 상승시켜 용존 금속을 불용성 슬러지로 침전시키고 상등수는 방류된다.…”

Section: 서 론unclassified

Effect of Oxidation on Selective Precipitation of Dissolved Fe, Al and Mn in Acid Mine Drainage during Neutralization

Seo¹,

Cheong²,

Yim³

et al. 2014

ksmer

Self Cite

View full text Add to dashboard Cite

This study was carried out to develop a selective sequential precipitation process for recovering dissolved metals from acid mine drainages (AMD). The AMD of pH 3 with high concentration of Fe, Al and Mn at the Samma-Teajung coal mine was neutralized by adding neutralizing agents and oxidant to evaluate recovery of the metals and purity of their precipitates. In the case of adding only neutralizing agents, both dissolved Al and Mn were concurrently precipitated at pH 4.5 so that caused the purity of each precipitate to be lowered. However, for neutralization preceded by oxidation of AMD, dissolved metals were removed sequentially in the order of Fe, Al and Mn. Recoveries of dissolved Fe, Al and Mn reached 99.2∼99.3% at pH 4.5, 70.4∼82.2% at pH 5.5, and 37.8∼87.5% at pH 8.5, respectively. Oxidation before neutralization increased the recovery of dissolved Fe and Al in AMD with high purity of precipitates.

show abstract

Section: 서 론unclassified