Determination of triclocarban and triclosan in biosolid and soil samples by application of pressurized liquid extraction and liquid chromatography with tandem mass spectrometry

차종문,Alison M Cupples 한국자원공학회 2012 Geosystem engineering Vol.15 No.4

A sensitive, rapid and reproducible analytical method for quantifying triclocarban (TCC) and triclosan (TCS) in biosolid and soil samples using pressurized liquid extraction (PLE) and ultraperformance liquid chromatography with triple quadrupole mass spectrometry (UPLC-MS-MS) is developed and presented in this study. The analytes were ionized in a new combined ESI-APCI (ESCi) operating with negative ion mode. Recoveries of TCC and TCS from biosolids and soil samples ranged from 93% to 102%, and the method detection limits were both 0.05 ng/g (d.w.). The intra- and inter-day precision of the assay fell within acceptable ranges of 15%. The developed method was applied to evaluate the occurrence of these compounds at two wastewater treatment plants and five farms in Michigan. TCC and TCS analyzed were detected in three biosolids samples at high concentrations. TCC and TCS were found at a low or trace level of concentration in the five soil samples which had had biosolids applied to them. This indicates that antimicrobials might enter surface water and groundwater through runoff or infiltration where biosolids are used as fertilizer.

금풍광산(鑛山) 광물(鑛物)찌꺼기의 광물(鑛物)학적 특성(特性) 및 중금속(重金屬) 제거(除去)

차종문,박제현,강헌찬,Cha, Jongmun,Park, Jayhyun,Kang, Heon Chan 한국자원리싸이클링학회 2012 資源 리싸이클링 Vol.21 No.6

본 연구의 목적은 금풍광산 광물찌꺼기 내 중금속의 광물학적 특성을 조사하고, 중금속 제거를 위한 부유선별 실험을 하였다. 광물학적 분석 결과, 휘동석, 유비철석, 황철석, 섬아연석, 방연석 등 황화광물이 존재하였다. 카드뮴과 다른 중금속(Cu, Pb, Zn)의 상관관계를 살펴보면 Cd는 Zn과 좋은 양의 상관관계를 가졌다. K.A.X.(Potassium Amyl Xanthate)와 Aerofloat 211을 포수제로 사용한 부유선별 실험 결과 광물찌꺼기 내 잔류 중금속(As, Cd, Cu, Pb, Zn)의 농도가 토양오염기준치를 만족하는 결과를 얻었다. The objective of this study was to research the mineralogical characteristics and removal of heavy metals of tailings from Gum-poong mine. From the result of mineralogical analysis, there are several sulphide minerals such as chalcocite, aresenopyrite, pyrite, sphalerite and galena. Cd and Zn have a good positive correlation from the statistical relation between Cd and other heavy metals(Cu, Pb, Zn). Residual heavy metals(As, Cd, Cu, Pb, Zn) from the Gum-poong tailings were removed under the warning criteria from the result of froth flotation with K.A.X.(Potassium Amyl Xanthate) and Aerofloat 211.

광주지역 일곡 매립지 주변에서의 하천수 및 지하수 오염 모니터링

차종문 대한자원환경지질학회 1999 자원환경지질 Vol.32 No.5

In order to dermine the degree of contamination for the Ilgok landfill site, stream water, groundwater and stream sediment samples were collected in 1998 and 1999, and analyzed for physico-chemical properties. The stream water contains significanr concentrations of TDS $HCO_3^-$and $NO_3^-$, and ground-water is polluted by $NO_3^-$ up to the drinking water standard from landfill leachate. From the point of the horizontal movement of elements, stream water IL-2 at the conjunction point with landfill leachate reached the most high concentrations of $HCO_3^-,Cl^-,Na^+, K^+, NO_3^-,Mg{^2+}$ and $SO_4^{2-}$stream water Il-3 shows the high concentrations of $Ca^{2+}, Pb^{2+}$ and $Mg^{2+}$. The optimum contamination indicator of Ilgok landfill site is $HCO_3^-, C^l-, Na^+, Mn^{2+}$ and TDS from the calculation of contamination factor.

Occurrence of β-lactam and polyether ionophore antibiotics in surface water, urban wastewater, and sediment

차종문,Shinwoo Yang,Kenneth H. Carlson 한국자원공학회 2015 Geosystem engineering Vol.18 No.3

The occurrence and fate of antibiotic compounds in the aquatic environment has been recognized as an emerging area of interest in environmental chemistry. An analytical method was developed and validated for determining β-lactam and polyether ionophore antibiotics in surface water, urban wastewater, and sediment based on solid-phase extraction (SPE) and liquid chromatography–ion trap tandem mass spectrometry (LC-MS-MS). The average recovery of β-lactams and polyether ionophores from all the fortified samples was generally higher than 80% (except for amoxicillin and ampicillin). A total of 400 actual water and sediment samples were analysed using SPE-LC-MS-MS to evaluate the occurrence and fate of these antibiotic compounds in a river and a wastewater treatment plant in northern Colorado. Most samples were found to be negative for β-lactam compounds. In those samples with positive results, β-lactam compounds were found at 15–17 ng/L in influent wastewater samples, 9–11 ng/L in surface water samples, and 0.13–0.36 μg/kg in sediment samples. No β-lactam compounds were detected in any effluent wastewater samples. The β-lactams are expected to be easily eliminated in wastewater treatment plants due to the lability of the β-lactam ring towards chemical and microbial degradation. The average concentration of ionophores ranged 0.03–0.05 μg/L in surface water samples and 0.5–3.1 μg/kg in sediment samples. These results confirm that β-lactam and ionophore antibiotics are adsorbed by sediment.

노화도 일대지역 납석광산의 색상별 광물학적 특성 연구

차종문,강헌찬,이상호,김민식,김완태 한국자원공학회 2012 한국자원공학회지 Vol.49 No.5

The purpose of this study was to investigate the mineralogical properties of pyrophyllite as a basic research on the technological development for its enhanced quality. Observation under the stereomicroscope showed that impurities were present in various forms in pyrophyllite ore. Alumnia contents determined by XRF analysis revealed the following: turquoise 1> turquoise 2> white 1> black> red> white 2. This clearly suggests that there exists a close relationship between the alumina contents and the color of pyrophyllite. Pyrophyllite samples—collected from Nowha—determined by XRD analysis were classified into pyrophyllite or pyrophyllite-quartz group. The results obtained by SEM analysis indicated that the alumina contents and crystalline form of pyrophyllite may be closely related to each other. Therefore, these results suggest the possibility of an optical screening in chemical composition by demonstrating that the color make the difference of the alumina contents and crystalline form of pyrophyllite. 납석의 품위향상 기술 개발을 위한 기초연구로서 납석에 대한 광물학적 특성을 조사하였다. 실체현미경 관측 결과 납석광석 내 불순물이 다양한 형태로 존재하였다. XRF 분석결과 알루미나 함량이 옥색 1>옥색 2>흰색 1>흑색>적색>흰색 2 순서로 조사되어 광석의 알루미나 함량과 육안 색상에는 밀접한 관련이 있는 것으로 사료된다. XRD 분석 결과 조사된 노화 납석 시료는 엽납석, 엽납석-석영군으로 분류되어지고, SEM 분석결과에서는 알루미나 함량과 결정형태가 서로 밀접한 관련이 있는 것으로 추측된다. 그러므로 육안색상별로 성분함량과 결정형태가 다름을 확인하여 광학선별의 가능성을 제시하였다.

토양 중 항생제의 위해성 고찰

차종문,김권래 한국토양비료학회 2014 한국토양비료학회 세미나 Vol.2014 No.8

ECETOC TRA 응용성에 관한 연구

차종문(Jongmun Cha),김종운(Jongwoon Kim),김상헌(Sanghun Kim),최은경(Eun Kyung Choe) 한국환경독성학회 2012 한국독성학회 심포지움 및 학술발표회 Vol.2012 No.5

태양광패널에 대한 생산자책임재활용제도 적용

이경아,차종문 한국자원공학회 2019 한국자원공학회지 Vol.56 No.4

The Korean government announced the Renewable Energy 3020 Implementation Plan to increase the share of renewable energy in the power sector to 20% by 2030. Accordingly, considerable renewable energy wastes, including those from solar photovoltaic (PV) and wind turbines, are expected to increase in the coming years. To recycle the end-of-life solar PV panel waste in an environmentally safe manner and to establish a waste recycling system in the future, the Korean government has proposed to amend the Enforcement Decree to the Act on the Resource Circulation of Electrical and Electronic Equipment and Vehicles by classifying solar PV panels as an extended producer responsibility (EPR) item, thus making solar panel manufacturers and importers responsible for their recycling. However, implementation of the proposed amendment has been postponed to 2021. This study addresses the important issues regarding the proposed amendment, and explores associated problems and improvements through a comparative analysis of the EPR in Korea and the EU. 재생에너지 3020 이행계획에 따르면 우리나라는 2030년까지 재생에너지 발전량 비중을 20%까지 확대할 예정이다. 재생에너지 보급 확대는 태양광패널이나 풍력터빈을 포함한 재생에너지 폐기물 발생 증가를 의미한다. 환경부는 태양광폐패널을 안전하고 친환경적으로 재활용하고 미래 폐기물 재활용 체계를 구축하기 위해, 태양광패널을생산자책임재활용제도 품목에 추가하여 태양광패널 제조업자나 수입업자가 재활용 의무를 부담하도록 하는 전기전자제품 및 자동차의 자원순환에 관한 법률 시행령 개정안을 발표하였다. 그러나 아직 전문적인 재활용 기반이 제대로마련되지 않아서 법률 개정안은 2021년 이후로 유예된 상태이다. 본 논문은 법률 개정안을 둘러싼 주요 이슈들을 파악하고 우리나라 생산자책임재활용제도와 EU 생산자책임제도의 주요 내용들의 비교·분석 연구를 통해 문제점과 개선방안을 모색하고자 한다.

폐금속광산지역 중금속 오염 토양 모사체의 물리적 선별

정도현,차종문 한국자원공학회 2022 한국자원공학회지 Vol.59 No.1

본 연구에서는 물리적 선별기술을 이용하여 폐금속광산 주변의 중금속으로 오염된 토양 모사체를처리하고자 하였다. 자력선별을 적용한 경우 5,000 gauss 이상의 조건에서 평균적으로 납 53%, 아연 67%, 비소 66%, 카드뮴 71%의 제거율을 보이며 부피를 약 16% 감소시켰다. 코로나 방전형 정전선별 적용 시 공급전압에 따른 제거율을 살펴본 결과, 납은 –35 kV일 때 38%, 아연과 카드뮴의 경우–30 kV일 때 각각 45%와 48%, 비소는 –25 kV 조건에서 38%로 가장 높았다. 하지만 비용적인 부분과 추후 처리해야 할 오염 토양의 부피를 고려할 때 –10 kV 조건이 최적이라 사료된다.

식물성 기름 포수제의 바텀애쉬 부유선별 특성 연구

김민식,차종문,강헌찬,Kim, Min Sik,Cha, Jong Mun,Kang, Heon Chan 한국자원리싸이클링학회 2018 資源 리싸이클링 Vol.27 No.2

This study aims to investigate the characteristics on bottom ash flotation using vegetable oils as a collector. The experiment of changing the kerosene dosage as a collector for the flotation of coal ashes, the recovery of unburned carbon and unburned carbon content were 80% and 63%, respectively, when the dosage of kerosene was 9 kg/ton. The experiment of using soybean oil as a collector to improve flotation efficiency, the recovery of unburned carbon and unburned carbon content increased to 95% and 68%, respectively, when the dosage of soybean oil was 9 kg/ton. The recovery of unburned carbon and unburned carbon content were 99% and 78%, respectively, when safflower oil containing more poly unsaturated fats with double bonds than soybean oil was 9 kg/ton. The calorific value of the unburned carbon was 5,803 cal/g, confirming that it was possible to be used as a fuel for thermal power plants. Lastly, using vegetable oil as a collector it showed higher recovery of unburned carbon and higher unburned carbon than kerosene, which was mineral oil. Moreover, oil containing a large amount of poly unsaturated fat with two or more double bonds was found to have higher unburned carbon than other vegetable oils; thus showing excellent adsorbability for unburned carbon.