TY - JOUR
T1 - Water quality changes in acid mine drainage streams in Gangneung, Korea, 10years after treatment with limestone
AU - Shim, Moo Joon
AU - Choi, Byoung Young
AU - Lee, Giehyeon
AU - Hwang, Yun Ho
AU - Yang, Jung Seok
AU - O'Loughlin, Edward J.
AU - Kwon, Man Jae
N1 - Funding Information:
We thank Mr. Woo Ram Lee for his assistance in field sampling. This work was supported by the KIST Institutional Program (Project No. 2Z04381 ) and by Korea Ministry of Environment as “The GAIA Project- 2013000540005 ”.
Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2015/12
Y1 - 2015/12
N2 - To determine the long-term effectiveness of the limestone treatment for acid mine drainage (AMD) in Gangneung, Korea, we investigated the elemental distribution in streams impacted by AMD and compared the results of previous studies before and approximately 10. years after the addition of limestone. Addition of limestone in 1999 leads to a pH increase in 2008, and with the exception of Ca, the elemental concentrations (e.g., Fe, Mn, Mg, Sr, Ni, Zn, S) in the streams decreased. The pH was 2.5-3 before the addition of limestone and remained stable at around 4.5-5 from 2008 to 2011, suggesting the reactivity of the added limestone was diminished and that an alternative approach is needed to increase the pH up to circumneutral range and maintain effective long-term treatment. To identify the processes causing the decrease in the elemental concentrations, we also examined the spatial (approximately 7. km) distribution over three different types of streams affected by the AMD. The elemental distribution was mainly controlled by physicochemical processes including redox reactions, dilution on mixing, and co-precipitation/adsorption with Fe (hydr)oxides.
AB - To determine the long-term effectiveness of the limestone treatment for acid mine drainage (AMD) in Gangneung, Korea, we investigated the elemental distribution in streams impacted by AMD and compared the results of previous studies before and approximately 10. years after the addition of limestone. Addition of limestone in 1999 leads to a pH increase in 2008, and with the exception of Ca, the elemental concentrations (e.g., Fe, Mn, Mg, Sr, Ni, Zn, S) in the streams decreased. The pH was 2.5-3 before the addition of limestone and remained stable at around 4.5-5 from 2008 to 2011, suggesting the reactivity of the added limestone was diminished and that an alternative approach is needed to increase the pH up to circumneutral range and maintain effective long-term treatment. To identify the processes causing the decrease in the elemental concentrations, we also examined the spatial (approximately 7. km) distribution over three different types of streams affected by the AMD. The elemental distribution was mainly controlled by physicochemical processes including redox reactions, dilution on mixing, and co-precipitation/adsorption with Fe (hydr)oxides.
KW - Acid mine drainage
KW - Limestone treatment
KW - Metals
KW - Sulfate
UR - http://www.scopus.com/inward/record.url?scp=84945971158&partnerID=8YFLogxK
U2 - 10.1016/j.gexplo.2015.09.015
DO - 10.1016/j.gexplo.2015.09.015
M3 - Article
AN - SCOPUS:84945971158
SN - 0375-6742
VL - 159
SP - 234
EP - 242
JO - Journal of Geochemical Exploration
JF - Journal of Geochemical Exploration
ER -