• 분석과학
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• 제14권2호
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• pp.173-179
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• 2001

K 수계 6개 지점의 퇴적물에 대해 Fe, Cu, Cr, Zn, Cd를 측정분석하였으며 분석방법들을 비교 분석하였다. 마이크로웨이브에 의한 전처리 방법이 미국의 TCLT(toxicity characteristic leaching procedure)나 폐기물공정시험방법보다 Fe, Cu, Cr, Zn, Cd 모두 높은 값을 나타내었다. 마이크로웨이브, TCLP, 폐기물 공정시험방법에 의한 중금속 분석결과 각각 38.1-48.0 mgFe/kg, 10.2-15.9 mgFe/kg, 3.5-12.6 mgFe/kg, 37.0-50.1 mgCu/kg, 0.06-0.24 mgCu/kg, 0.01-0.03 mgCu/kg 및 137.2-152.0 mgZn/kg, 0.67-0.82 mgZn/kg, 0.3-0.5 mgZn/kg으로 나타났다. 이상의 결과로부터 퇴적물 중에 오염도를 정확히 평가하기 위해서는 효율적이고 새로운 시험방법 개발 연구에 관심을 두어야 한다.

• 한국결정성장학회지
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• 제19권3호
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• pp.135-143
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• 2009

$Cr^{6+}$의 고용화 가능성과 lignin계 혼화제의 성능을 조사하기 위하여 과잉의 $Cr^{6+}$을 첨가하여 KSLI, 미국 TCLP법, Soaking Procedure를 이용하여 각 기준에 따른 용출 특성을 조사하였다. 그 결과 lignin계 혼화제는 첨가에 따라 모르타르 강도 증진을 보였으며 용출 특성에 큰 변화는 없었다.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2001년도 총회 및 춘계학술발표회
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• pp.206-209
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• 2001

This study presents the leaching characterization of heavy metals according to changes of pH by ANC test on slag produced in electric arc furnace, bottom ash produced in coal-fired plants and their recycling products. Availability test was performed to assess the fraction of the total concentration that under worst environmental conditions could become available for leaching. TCLP, KLT(Korea Leaching Test) and KLTS(Korea Leaching Test of Soil contamination) were carried out to compare the leaching capacity and to estimate the adequacy of regulatory leaching test. Results from regulatory leaching tests could be misleading because the variable ANC of wastes can lead to very different final leachate pHs. The final pH of the regulatory test is not the ambient pH in the disposal environment, the actual solubilities of contaminants in the field may be entirely different from those predicted by these regulatory tests. Leaching behaviour of by-products was changed by recycling processes, therefore acid neutralization capacity and availability of new products, not leaching concentration by one batch regulatory test, are necessary to determine the method of recycling.

• 자원리싸이클링
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• 제16권2호
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• pp.40-47
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• 2007

생활폐기물 소각장에서 발생되는 바닥재를 콘크리트 잔골재로 재활용하기 위해서, 기준모르타르에 모래 10%를 바닥재로 대체 하고 시멘트 10%를 포졸란성 규조토로 대체한 후, KS L 5105와 TCLP에 따라 시험하였다. 결과에 의하면, 바닥재의 유해중금속들은 TCLP 허용치 범위에 있었다. 포졸란성 규조토와 바닥재를 혼합한 모르타르 압축강도는 기준모르타르보다 높았으며 동시에 모든 유해중금속들은 TCLP 기준치 범위에 들어 있었다. 따라서 포졸란성 규조토를 안정재로 사용하게 되면 바닥재를 콘크리트 잔골재로 재활용할 수 있다.

• 한국응용과학기술학회지
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• 제26권1호
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• pp.80-86
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• 2009

This research was performed to evaluate heavy metal leaching characteristics of the sludge from paper mill process with sintering temperature. Heavy metal leaching of the sludge was characterized with Korean Leaching Test and Toxicity Characteristic Leaching Procedure. The test sludge was composed of 70.72% of moisture, 9.5% of volatile solids and 9.76% of fixed solids. As a result of XRF analysis, Fe was the highest inorganic element in approximately 83%, which implies the recycling possibility of the sludge in reuse of Fenton chemicals and artificial lightweight aggregate. Leaching of heavy metals from sintered sludge was lower than the dry ones. However, there was no significant difference in leaching characteristics between the sludges sintered at $350^{\circ}C$ and $650^{\circ}C$. Zn and Fe were leached more greatly in TCLP and KLT methods respectively.

• 한국지하수토양환경학회지:지하수토양환경
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• 제15권3호
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• pp.52-60
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• 2010

The stone-dust is an unavoidable by-product of aggregate production, which is produced about 0.8~1.0 million $m^3$ annually. The stone-dust is currently regarded as a hazard material on environment because it is classified as an industrial waste in the Waste Management Law of Korea. At present, the stone-dust is considered as a environmentally hazardous material, and is classified as an industrial waste according to the Waste Management Law of Korea. In this study, we assessed the heavy-metal contamination of the stone-dust on surrounding environments by various leaching tests. Leaching experiments (such as Korea Standard Leaching Procedure (KSLP), Soil Environment Preservation Act of Korea (SEPAK), Toxicity Characteristic Leaching Procedure (TCLP), and Synthetic Precipitation Leaching Procedure (SPLP)) show that very low heavy metals (As, Cd, Cu, Pb, Zn, Hg) and CN are leached out, or much less than each regulatory thresholds. The resuts of the leaching test with time in acidic solution (initial pH 5 and 3) indicate that pH-buffering minerals are present in the stone-dust. These results suggest that the stone-dust can not potentially affect adverse impact on surrounding environments such as surface water, groundwater and soil etc..

• 환경영향평가
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• 제16권1호
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• pp.35-43
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• 2007

Vitrified aggregates obtained by using mine tailings were evaluated using various leaching methods to assess their environmental safety. The leaching tests in this study include continuous batch leaching, Dutch availability leaching, pH-stat and tank diffusion test as well as TCLP (Toxicity Characteristic Leaching Procedure), which is commonly adopted. Vitrification technique has successfully been applied treating some solid wastes containing high level of heavy metals, such as EAF (Electric Arc Furnace) dust and mine tailings. The potentially most leachable element among trace metals was As and theoretically about 7% of total concentrations in the aggregate can be released under extreme condition. Zinc was leached about 4% and the other trace metals including Cd, Cr and Pb were hardly released from the vitrified mine tailing aggregate.

• 한국세라믹학회지
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• 제39권8호
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• pp.728-734
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• 2002

전기로 더스트를 점토 또는 백토와 혼합하여 소성온도에 따른 전기로 더스트 내에 존재하는 Cr, Cd, Cu, Pb, Fe, Zn 중금속들의 거동을 조사하였다. 전기로 더스트를 점토와 백토에 각각 0∼50 wt%씩 첨가하였고, 소성은 $200^{\circ}C$ 간격으로 $200∼1200^{\circ}C$ 범위 내에서 수행하였다. 소성된 시편은 TCLP법에 의한 용출실험을 거친 후 ICP-AES로 분석하였다. 중금속표준용액을 이용한 양이온 교환능 실험결과 점토와 백토가 기존의 중금속 흡착제인 제올라이트와 비슷한 중금속 양이온 교환능을 보였으며, Cr에 대해서는 더 우수한 교환능이 관찰되었다. TCLP법에 의한 용출실험 결과 Cr과 Fe는 모든 시편에서 거의 용출되지 않았으며, Cd과 Zn은 소성온도가 증가하고 전기로 더스트의 함량이 적을수록 용출량이 감소하였다. 점토 또는 백토와 전기로 더스트를 혼합 소성 시 일차적으로 양이온 교환능에 의해 중금속이 준안정화되고 이차적으로 공융반응에 의하여 중금속들이 완전하게 고정화되어 중금속 용출을 억제하는 것으로 추정된다. 본 연구에서 백토가 점토 보다는 전기로 더스트 중금속의 안정화에 더 효과적이었다.

• 환경위생공학
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• 제16권1호
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• pp.53-60
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• 2001

In this study, the heavy metals in tannery sludge were solidified by using cement and power plant fly ash. Solidification characteristics were discussed with the compressive strength and chromium leaching characteristics of solids. The compressive strength of cement mortar was increased by the amount of fly ash up to 24.3~33.8%, which was considered the results of pozzolanic reaction. When the content of fly ash was 20%, cement mortar showed the highest value $295kg/\textrm{cm}^2$ for 28 days curing. At early curing days, solidified chromium tannery sludge solids were showed lower compressive strength because of the retard on the hydration of cement, but the compressive strength was recovered to be more than $140kg/\textrm{cm}^2$ for 28 days curing regardless with the amounts of fly ash. Also, the results of leaching tests by KSM and TCLP method were showed that the solidified chromium sludge have leached out 0.3~2.2% and 11~17%, respectively.

• 한국항해항만학회지
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• 제38권6호
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• pp.655-661
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• 2014

본 연구에서는 해양오염퇴적물 내 Ni, Cu, Pb 및 Zn 등 중금속에 대하여 벤토나이트를 이용한 안정화 처리를 수행하였다. 안정화 실험은 해양오염퇴적물에 벤토나이트 첨가 후 150일간 습윤 양생 하여 실시하였다. 중금속 연속추출 결과로부터, 미처리 오염퇴적물과 비교해서 Ni, Cu, Pb 및 Zn은 용이하게 용출가능한 존재형태(이온교환, 탄산염, 산화물 형태)가 벤토나이트에 의해 각각 8.5%, 5.6%, 19.2% 및 28.2% 감소하였다. 또한, 안정화제 의한 오염퇴적물의 용출저감 평가를 위해 TCLP(Toxicity Characteristic Leaching Procedure)를 수행한 결과, 미처리 오염퇴적물과 비교하여 안정화 처리 퇴적물인 경우 중금속의 용출량이 각각 Ni 95.7%, Cu 96.8%, Pb 99.2%, Zn 85.9%씩 크게 감소하는 것을 확인하였다. 이러한 결과로부터, 벤토나이트를 해양오염퇴적물의 피복소재로 사용할 경우 시험 대상 중금속의 안정화 효과가 확인되었다.