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UV/O<sub>2</sub> 가스상 세정을 이용한 실리콘 웨이퍼상의 PEG 반응기구의 관찰
권성구,김도현,김기동,이승헌,Kwon, Sung-Ku,Kim, Do-Hyun,Kim, Ki-Dong,Lee, Seung-Heun 한국전기전자재료학회 2006 전기전자재료학회논문지 Vol.19 No.11
An experiment to find out the removal mechanism of PEG(polyethyleneglycol) by using UV-enhanced $O_2$ GPC (gas phase cleaning) at low substrate temperature below $200^{\circ}C$ was executed under various process conditions, such as substrate temperature, UV exposure, and $O_2$ gas. The possibility of using $UV/O_2$ GPC as a low-temperature in-situ cleaning tool for organic removal was confirmed by the removal of a PEG film with a thickness of about 200 nm within 150 sec at a substrate temperature of $200^{\circ}C$. Synergistic effects by combining photo-dissociation and photo oxidation can only remove the entire PEG film without residues within experimental splits. In $UV/O_2$ GPC with substrate temperatures higher than the glass transition temperature, the substantial increase in the PEG removal rate can be explained by surface-wave formation. The photo-dissociation of PEG film by UV exposure results in the formation of end aldehyde by dissociation of back-bone chain and direct decomposition of light molecules. The role of oxygen is forming peroxide radicals and/or terminating the dis-proportionation reaction by forming peroxide.
실제 산업 폐수로부터 견운모를 이용한 Batch 공정에서의 니켈 흡착
권성구(Seong-Ku Kwon),정강연(Kang-Yeon Jung),전충(Choong Jeon) 유기성자원학회 2022 유기성자원학회 학술발표대회논문집 Vol.2022 No.추계
Sericite was used as a adsorbent to efficiently remove Ni(II) from actual industrial wastewater which has Na(I) of high concentration. The removal efficiency for Ni(II) could not be affected by Na(I) which generate ionic strength and the highest removal efficiency was about 93% at pH 7.5. The silanol (SiO2) and aluminol (Al2O3) groups in sericite are likely to play important role in adsorption process. All adsorption process was completed in 120min and removal efficiency of sericite was higher than that of Amberlite IR 120 plus resin. The effect of temperature on the removal efficiency of Ni(II) was negligible. Also, to investigate the surface condition and functional groups of sericite, SEM (Scanning Electron Microscopy) photograph, EDX (Energy Dispersive X-ray) spectrum, and FT-IR spectrum were applied. In addition, previously adsorbed Ni(II) onto sericite could be easily and completely eluted by HNO3.
국내 배터리 3사(LG에너지솔루션, 삼성SDI, SK온)의 지속가능한 광물자원 확보 전략
권성구(Seongku Kwon),한수호(Suho Han),박준희(Junhee Park),조유라(Yoora Cho),이재혁(Jay Hyuk Rhee),옥용식(Yong Sik Ok ) 대한환경공학회 2024 대한환경공학회지 Vol.46 No.4
최근 들어 국제적으로 지속가능성 이슈가 부각되고 환경 규제가 증가함에 따라 국내 기업의 지속가능경영에 대한 필요성이 증가하고 있다. 본 연구에서는 지속가능한 광물 채굴과 조달에 대한 국내 배터리 3사(LG에너지솔루션, 삼성SDI, SK온)의 대응 현황을 평가하고자 광물 공급 과정에서의 환경 관리 현황을 분석하였다. 특히, 기업은 이러한 규제에 전략적으로 대응하여 경영 전략을 수립할 필요가 있으므로 경영학적인 관점에서 지속가능한 광물자원 확보를 위한 전략을 제안하였다. 그 결과, 기업은 광물 자원 확보 전략에 대해 중장기적인 성과 측정이 필요한 것으로 판단되었다. 즉, 광물은 채굴단계부터 활용단계의 공급사 평가 시, OECD 가이드라인을 뛰어 넘는 보다 적극적인 환경관리 계획을 수립해야 할 것이다. 또한 공급망 관리 측면에서는 온실가스 배출 모니터링 이외에도 토양 및 수질오염, 폐기물관리, 생물다양성의 손실에 대한 평가가 요구된다. 끝으로 국내 배터리 기업은 탄력적인 배터리 공급망을 구축할 수 있도록 안정적인 폐배터리 재활용 시스템을 구축해야 할 것이다. The proliferation of global regulations concerning sustainability and environmental protection poses a significant challenge to maintaining corporate sustainability. Consequently, companies must strategically respond to navigate these regulations in their management plans. The objective of this research was to analyze how Korean companies(LG Energy Solution, Samsung SDI, SK On) are responding to sustainable mining and procurement and how they adopt environmentally friendly practices in their mineral supply chain for battery manufacturing. We also proposed new actions to enhance their management strategies for sustainable mineral resource management. Our observations indicated that companies should implement a long-term performance measurement throughout their mineral supply chain. Additionally, there is an urgent need to develop a more proactive environmental management plan when evaluating suppliers from mineral extraction to utilization, adhering to global guidelines such as OECD regulation. In addition to the widely adopted monitoring of greenhouse gas emissions, priority assessments must be undertaken concerning soil and water pollution, waste management, and biodiversity loss within the supply chain linked with climate change under the nature-positive concept. We recommended the establishment of a recycling system for battery waste(i.e., minerals), which is essential for a resilient battery supply chain.