초록 ▼

${\cdot}$ 폐타이어 박편 및 제강슬래그에 의한 복합 오염물질 제거
- 오염물질이 함유된 침출수의 중금속 (Cr, Cu, Zn, Cd, As) 및 TCE, $NO_3^-,\;NH_4^+$, CODcr의 제거효율이 뛰어난 것으로 확인됨.
${\cdot}$ 컬럼실험을 통한 중금속 및 TCE 등 기타 오염물질제거 관찰
- ORP는 -값을 가졌으며 중금속은 영가 철/제강슬래그 층에서 99% 제거율을 보임
- TCE, Nitrate는 전부 제거되었으며, B

${\cdot}$ 폐타이어 박편 및 제강슬래그에 의한 복합 오염물질 제거
- 오염물질이 함유된 침출수의 중금속 (Cr, Cu, Zn, Cd, As) 및 TCE, $NO_3^-,\;NH_4^+$, CODcr의 제거효율이 뛰어난 것으로 확인됨.
${\cdot}$ 컬럼실험을 통한 중금속 및 TCE 등 기타 오염물질제거 관찰
- ORP는 -값을 가졌으며 중금속은 영가 철/제강슬래그 층에서 99% 제거율을 보임
- TCE, Nitrate는 전부 제거되었으며, Bio-barrier에서 Ammonia는 49%, CODcr은 94%가 제거되는 것을 확인할 수 있었음.
${\cdot}$ Synergistic effect test
- 영가 철과 산화 철과의 TCE 반응성에서 영가 철에서의 제거율이 더 높게 나타남.
- 혐기성 미생물을 인위적으로 주입한 컬럼의 TCE 제거효율이 가장 높은 것으로 확인됨.
${\cdot}$ SEM을 이용한 폐타이어에 미생물 부착 확인
${\cdot}$ 현장 M-PRB Pilot의 중금속은 92% TCE는 100% 제거가 이루어짐
${\cdot}$ M-ZVI 5%와 벤토나이트를 혼합하였을 경우, 중금속이 96.8% 제거되어 차수층으로의 활용도가 높을 것으로 판단됨.

Abstract ▼

The leachate of unsanitary landfills has recognized an environmental problem that causes adverse effects to the qualify of soil and groundwater. The leachate contains many contaminants in the landfill. The Permeable Reactive Barriers (PRBs) are a relatively simple remediation technology which a zone

The leachate of unsanitary landfills has recognized an environmental problem that causes adverse effects to the qualify of soil and groundwater. The leachate contains many contaminants in the landfill. The Permeable Reactive Barriers (PRBs) are a relatively simple remediation technology which a zone of permeable reactive media is placed in a contaminated plume by leachate.
In this study, the researchers have focused very enhanced PRB which is called Multi-purpose Permeable Reactive Barrier (Multi-PRB) with some waste materials. Multi-PRBs (enhanced PRBs) consisting of two reactive barriers are considered to prevent the transfer of various mixed contaminants in leachate into soil and ground water. Multi-PRBs are composed of ZVI-barrier (wasted ZVI scrap, Converter slag) and Bio-barrier (wasted tire scrap, anaerobic microorganisms) to treat contaminated groundwater in the landfill. The physico-chemical and biological pollutant removal processes are combined with the M-PRBs. The recycled waste used for Multi-PRBs system could offer potential environmental and economic benefit to clean up groundwater contaminated with varying contaminants in leachate.
The purpose of the this study is to simulate the reactivity and availability of Multi-PRBs system (ZVI-barrier / Bio-barrier), Also, this study is more focused contamination movement in the M-PRB system that can remove and decrease the concentration of leachate, when the leachate is leaking to the liner.
The column and pilot tests were performed to analyse the removal rate of synthetic leachate (Cr, Cu, Zn, Cd, As, TCE) by Multi-PRBs system. In addition, the column tests were $NO_3^-,\;NH_4^+$, CODcr. The reactivity test for M-ZVI with heavy metal solution (containing Cd, Cr, Cu, Zn, As) was conducted in batch and column test.
In the Multi-PRBs column test, pH levels increased from 4 to 7 through the ZVI-barrier. The ORP was measured along the length of the columns to verify that ZVI induces reducing conditions. Heavy metals (Cr, Cu, Zn, Cd, As) were rapidly removed about 99% in the reactive zone containing wasted ZVI scraps with converter slag of ZVI-barrier. Trichloroethylene (TCE) and nitrate were completely removed in the reactive zone of ZVI-barrier. Ammonia was removed 49% in the biologically reactive zone containing wasted tire scraps with anaerobic microorganisms. CODcr, organic material was removed 94% in the Bio-barrier.
The results of pilot test with M-PRB indicate that the range of pH level increased from 4 to 12 in the ZVI-barrier. The ORP values were decreased in ZVI. Also, heavy metals (Cr, Cu, Zn, Cd, As) were removed about 92% in the reactive zone (ZVI-barrier). TCE was completely removed.
The removal rate of heavy metal in batch test with the M-ZVI was about 100%. On the other hand, the removal rate was more than 90% according to mixing ratio in the column test. Especially, the 3% and 5% of M-ZVI showed 92.3%, 96.8% of removal rate.
As the results, the researchers can surmise that the Multi-PRBs system might be an effective approach to intercept contaminants of leachate In the unsanitary landfills.

목차 Contents

• 제 1 장 서론...12
• 제 1 절 연구의 필요성...12
• 제 2 절 연구의 목적...14
• 제 2 장 국내외 기술개발 현황...16
• 제 1 절 국외 기술개발 현황...16
• 제 2 절 국내수준...26
• 제 3 장 연구개발수행 내용 및 결과...29
• 제 1 절 이론적 배경...29
• 제 2 절 M-PRBs Column 설치...73
• 제 3 절 M-PRBs 컬럼 실험...91
• 제 4 절 산화철/미생물에 의한 상승효과 실험...117
• 제 5 절 미생물의 폐타이어 표면상 부착능 실험...134
• 제 6 절 M-PRBs Pilot Plant 시공 및 분석...144
• 제 7 절 K 비위생 매립지 M-PRBs 분석...164
• 제 8 절 K 비위생 매립지 M-PRBs 분석...204
• 제 9 절 차수재 개발 및 기초연구...218
• 제 4 장 연구개발 목표 달성도 및 대외기여도...254
• 제 1 절 연구개발 목표 달성도...254
• 제 2 절 대외기여도...255
• 제 5 장 연구개발 결과의 활용계획...258
• 제 1 절 현장 적용 범위...258
• 제 2 절 현장 적용 방안...259
• 제 3 절 평가 방안...264
• 제 4 절 연구개발의 성과 활용...267
• 제 5 절 사업화 성과 활용...273
• 제 6 절 현장운용 방안 및 활용계획...275
• 제 6 장 참고문헌...280
• 부록...286