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.

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.

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 자원리싸이클링 Vol.21 No.6

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.

토양 중 항생제의 위해성 고찰

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

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.

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

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.

사출공장 화선 경매응찰전략의 건

류태철,차종철,도필선,김창석,서동진,송진규,이광인,이은순,이태헌,정연문,주종범 명지대학교 증권보험대학원 1999 졸업논문집 Vol.- No.11

EU 이산화탄소 지중저장 법제 현황 및 도전 과제

이경아,차종문 한국자원공학회 2016 한국자원공학회지 Vol.53 No.4

The European Union (EU), as an international leader, has long acknowledged and acted upon the need for urgent action in the fight against climate change. The EU has taken a strong supportive stance on the deployment of Carbon dioxide Capture and Storage (CCS), particularly by adopting an enabling legal and regulatory framework of the 2009 Directive on the geological storage of carbon dioxide. This study provides an up-to-date examination of a number of legal and regulatory aspects with regard to CCS mainly within the EU CCS Directive context, including careful storage site selection, monitoring, long-term liability, financial responsibility, property rights, public acceptance, etc. EU’s practical experience of CCS projects and its challenges going through the regulatory process may help to Korea to take actions toward the construction of a workable and efficient regulatory framework for CCS. EU는 전 세계 어느 국가보다도 기후변화에 대한 중요성을 오래전부터 인식하여 기후변화대응 정책을 선도적으로 마련해왔다. 특히 2009년 이산화탄소 지중저장에 관한 지침 마련은 이산화탄소 포집 및 저장 (CCS) 사업에 대한 EU의 적극적인 지지 입장을 강하게 보여주고 있다. 본 논문은 EU 이산화탄소 지중저장 지침 내에서 법적 규제적측면들에 관한 현황, 특히 신중한 저장소 선정, 모니터링, 장기 책임, 재원 확보, 재산권, 사회적 수용성 등을 중점적으로 살펴보았다. 규제적 절차를 통한 EU CCS 사업의 실무 경험과 도전 과제들에 대한 검토를 통해 우리나라가 실제적으로 활용가능하고 효율적인 CCS 법령을 구축하기 위한 발전 방향을 모색하고자 한다.