• A Case Study on Groundwater Remediation Using Combined Pumping and In-Situ Chemical Oxidation (Persulfate) Methods

  • Dong Jun Kang1 ㆍJeongwoo Kim1 ㆍHyeon Woo Jang1 ㆍJi Ho Seo1 ㆍYong Hoon Cha1 ㆍSeon Ho Shin1 ㆍHyung Pyo Kwon1,2*

  • 1GeoGreen21 Co., Ltd., Seoul 08376, Republic of Korea
    2Department of Geology, Kangwon National University, Chuncheon 24341, Republic of Korea

  • 양수처리 및 지중 정화(과황산염) 공법을 복합 적용한 지하수 정화 사례 연구

  • 강동준1 ㆍ김정우1 ㆍ장현우1 ㆍ서지호1 ㆍ차용훈1 ㆍ신선호1 ㆍ권형표1,2*

  • 1(주)지오그린21
    2 강원대학교 지질학과

  • This article is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This work presents a case study of applying a combined remediation strategy using Pump-and-Treat (P&T) and In-Situ Chemical Oxidation (ISCO) to remediate phenol-contaminated groundwater. In 2020 and 2021, emergency containment actions were implemented with maximum pumping rates to reduce phenol concentration, which were measured at 356, 535, and 258 mg/L at W1R, EW1R, and EW3R, respectively. From 2022, planned pumping operations combined with persulfate (PS) injection were initiated to manage the rebound effect. As a result, all observation points maintained phenol concentrations below 1 mg/L from 2023 onward. By 2024, phenol concentrations at all sites reached non-detectable levels (<0.005 mg/L). The study confirms that optimizing pumping rates and capture zones was effective in achieving complete contaminant removal. Furthermore, it highlights the importance of swift initial responses in maximizing remediation efficiency with less costs, offering valuable insights to development of effective remediation strategies in similar contamination cases.


Keywords: Groundwater remediation, Pump and treat, In-situ chemical oxidation, Persulfate

This Article

  • 2024; 29(6): 71-86

    Published on Dec 31, 2024

  • 10.7857/JSGE.2024.29.6.071
  • Received on Oct 23, 2024
  • Revised on Nov 13, 2024
  • Accepted on Nov 27, 2024

Correspondence to

  • Hyung Pyo Kwon

  • 1GeoGreen21 Co., Ltd., Seoul 08376, Republic of Korea
    2Department of Geology, Kangwon National University, Chuncheon 24341, Republic of Korea

  • E-mail: asp07@geogreen21.com