Case Study on the Treatment of Acid Rock Drainage from an Embankment with Pyrite Rocks

Jeong-Sik Gong; Tae-Hyung Kim; Young-Suk Song

doi:10.9720/kseg.2021.4.523

All Issue

2021 Vol.31, Issue 4 Preview Page Next Page

Research Article

Case Study on the Treatment of Acid Rock Drainage from an Embankment with Pyrite Rocks 황철석 암버럭을 이용한 고속도로 성토체의 산성배수 처리 사례 연구

31 December 2021. pp. 첫페이지-끝페이지

PDF XML

Abstract

The treatment of acid rock drainage was reviewed and evaluated for the case of pyrite rocks distributed in a highway embankment. During the highway’s construction, neutralization using alkaline water repellent was applied to the embankment section to prevent acid rock drainage. However, it still occurred long after the construction was completed owing to rain infiltration, and the acid rock drainage polluted the surrounding soils and streams. To solve this problem, treatment facilities such as SAPS (Successive Alkalinity Producing Systems) or ecological wetlands and sand filtration were installed. After the installation of the treatment facilities, the effluent and soils contaminated by acid rock drainage nearby the outlet of the facilities were analyzed and evaluated for a period of years. Measurements of the pH of the effluent and analysis of the heavy metal contamination of the soils confirmed that the neutralization treatment for acid rock drainage is being performed properly and that contamination of heavy metals in the acid rock drainage is also being stably controlled by the treatment facilities.

Keywords

pyrite rocks

acid rock drainage

highway construction

embankment materials

treatment facilities

본 연구에서는 고속도로 공사 시 주변에 분포하고 있는 황철석이 포함된 암버럭을 성토재로 활용한 사례를 대상으로 산성배수 처리방안을 조사 및 평가하였다. 도로 시공 시 해당 성토구간에 알칼리 차수제를 이용한 중성화 공법을 적용하여 산성배수가 발생되지 않도록 하였다. 그러나 시공이 완료된 이후 장기적인 우수침투로 인하여 산성배수가 유출되어 주변의 토양과 하천을 오염시켰다. 이를 해결하기 위하여 SAPS조 혹은 생태습지 및 모래여과시설과 같은 정화처리시설을 설치하였다. 정화처리시설 설치 후 유출부에서의 방류수와 주변 토양을 대상으로 산성배수로 인한 오염여부를 평가하였다. 유출부에서의 방류수에 대한 pH 측정 및 주변 토양의 중금속 오염 분석 결과 산성배수에 대한 중화처리가 적절하게 진행되고 있으며, 산성배수 내 존재하는 중금속에 대한 오염관리도 안정적으로 진행되고 있음을 확인할 수 있다.

키워드

황철석 암버럭

산성배수

고속도로 공사

성토재료

정화시설

References

Kim, J.G., 2007, Acid drainage and damage reduction strategy in construction site: an introduction, Economic and Environmental Geology, 40(5), 651-660 (in Korean with English abstract).

Kim, J.G., Song, Y.S., Jeon, C.M., Nam, I.H., 2014, Assessment and stabilization embankment methods of acid rock drainage, The Magazine of the Korean Society of Civil Engineers, 62(6), 36-41 (in Korean). 10.4491/KSEE.2014.36.10.679

Lee, J.S., Kim, J.G., Park, J.S., Jeon, C.M., Nam, I.H., 2013, Assessment and damage reduction strategy of acid rock drainage in highway construction site: ○○ highway construction site, Economic and Environmental Geology, 46(5), 411-424 (in Korean with English abstract). 10.9719/EEG.2013.46.5.411

Ministry of Environment, 2009, Soil environment conservation act (in Korean).

Song, Y.S., Kim, J.G., Jeon, C.M., Nam, I.H., 2014, Embankment construction method using acid rock drainage, Geotechnical Engineering, Korean Geotechnical Society, 30(4), 18-25 (in Korean).

Information

Publisher :Korean Society of Engineering Geology
Publisher(Ko) :대한지질공학회
Journal Title :The Journal of Engineering Geology
Journal Title(Ko) :지질공학
Volume : 31
No :4
Pages :첫페이지-끝페이지
Received Date : 2021-10-06
Revised Date : 2021-11-04
Accepted Date : 2021-11-15
DOI :https://doi.org/10.9720/kseg.2021.4.523

The Journal of Engineering Geology ISSN:1226-5268(Print) 2287-7169(Online) 지질공학

All Issue