영가철/바이오 복합처리제를 이용한 질산성 질소 오염 지하수의 현장 지중정화 적용성 평가 (Field Assessment of in Situ Remediation of NO3 –contaminated Ground Water Using Zero-valent Iron/Bio Composite Media)

주완호 (Wan-Ho Joo); 장윤영 (YOON-YOUNG CHANG)

Field Assessment of in Situ Remediation of NO3 –contaminated Ground Water Using Zero-valent Iron/Bio Composite Media

Journal of Environmental Impact Assessment
Abbr : J EIA
2021, 30(1), pp.35-48
Publisher : Korean Society Of Environmental Impact Assessment
Research Area : Engineering > Environmental Engineering
Received : January 19, 2021
Accepted : January 26, 2021
Published : February 28, 2021

Wan-Ho Joo ¹, YOON-YOUNG CHANG ¹

¹광운대학교

Accredited

ABSTRACT

In this study, the assessment of field applicability of in-situ remediation of nitratecontaminated groundwater located in Yesan-gun was performed. Zero-valent iron/bio composite media injected PRB (Permeable Reactive Barrier) and monitoring well were installed in the contaminated groundwater site and monitored main remediation indicators during the PRB operation. Nitrate, nitrite, ammonia, Fe ion, TOC, and turbidity were analyzed and the diversity and population of microorganism in the PRB installed site were investigated for the verification of effect of injected PRB. In the study site where is an agricultural area, a river flows from west to east that forms a river boundary and the southern area has an impermeable sector. It was found that nitrate flows into the river, which is similar as groundwater flow. Simulation result for the fate of nitrate in groundwater showed steady state of nitrate arrived after 3~5 years passed. However, it is just to consider current conditions with no additional input of contaminant source, if additional input of contaminant source occurs contamination dispersion and time for steady state are expected to be increased. The monitoring results showed that Fe ion, TOC and turbidity in groundwater were not clearly changed in concentration after PRB installation, which indicates adaptability of the injected PRB for remediation of groundwater with no additional harmful effect to water quality. The concentration of nitrate maintained less than 5mg/L until 42 days after PRB installation and recovered its initial concentration after 84 days passed and showed termination of reactivity of injected zero-valent iron/bio composite media forremoval nitrate. Nitrite and ammonia ions found after installation of PRB indicates reductive removal of nitrate. And the outstanding increase of microorganism diversity and population of Betaproteobacteria Class which includes denitrification microorganism explains biologically reductive removal of nitrate in injected PRB.

KEYWORDS

Nitrate, groundwater contamination, in-siu remediation, permeable reactive barrier, biological reduction

Citation status

* References for papers published after 2023 are currently being built.

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Journal of Environmental Impact Assessment 2023 KCI Impact Factor : 0.51

Field Assessment of in Situ Remediation of NO3 –contaminated Ground Water Using Zero-valent Iron/Bio Composite Media

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Citation status

* References for papers published after 2023 are currently being built.

Journal of Environmental Impact Assessment 2023 KCI Impact Factor : 0.51

Field Assessment of in Situ Remediation of NO3 –contaminated Ground Water Using Zero-valent Iron/Bio Composite Media

ABSTRACT

KEYWORDS

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* References for papers published after 2023 are currently being built.