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Minsoo Kim(김민수),Young Eun Song(송영은),Jung Rae Kim(김중래) 환경독성보건학회 2021 한국독성학회 심포지움 및 학술발표회 Vol.2021 No.5
2,2-Bis (4-hydroxyphenyl) propane (bisphenol A) is a precursor in many industrial and manufactural resins, plastics, and polycarbonate, as well as an endocrine disruptor in humans and animals. Therefore, the real-time sensing and in-situ removal of BPA are in strong demand. This study evaluated a method for the electrochemical detection of BPA using a carbon felt electrode. BPA was detected by cyclic voltammetry. During detection, the BPA was electropolymerized to a non-conductive lump and layer on the electrode surface. Simultaneously, the capacitance and electrochemical properties of the carbon felt decreased. The peak current and BPA concentration showed a linear correlation; the estimated detection limit was 4.78 × 10<sup>-7</sup>M. The BPA-electropolymerized carbon felt could be regenerated successfully by ultrasonication. The detection and quantification of BPA in real water samples showed satisfactory recoveries of 98.4 - 101.0%. The carbon felt-based electrochemical analysis exhibited high sensitivity and reusability, making it applicable to the in-situ and on-site detection and removal of endocrine disruptors, such as BPA.
신재생 전기에너지를 이용한 CO<sub>2</sub> 고부가화 미생물전기합성 기술의 최신 연구 동향
김민수 ( Minsoo Kim ),리수웨이 ( Shuwei Li ),김중래 ( Jung Rae Kim ) 한국공업화학회 2022 공업화학전망 Vol.25 No.6
미생물전기합성(Microbial electrosynthesis, MES)은 자가증식이 가능한 미생물촉매를 생물전기화학반응시스템의 환원전극에 도입해 CO<sup>2</sup>를 환원시켜 아세트산 및 휘발산, Polyhydroxybutyrate (PHB) 및 Single cell protein (SCP)을 합성하는 기술이다. 전기에너지로 통합될 미래 에너지 플랫폼에서 전기에너지를 물질화할 수 있는 플랫폼기술로 주목을 받고 있다. 최근 전극재료 및 반응시스템 개발, 합성생물학을 이용한 미생물 개량을 통해 목적 대사산물의 생산 성능이 향상되고 있으며, 향후 Carbon Capture & Utilization (CCU) 기술로서 활용 가능성이 크다. 본 논문에서는 미생물전기합성을 이용해 CO<sub>2</sub>로부터 각종 휘발산 생산, PHB 및 SCP 등 고부가물질 합성, 혐기성소화공정의 바이오가스 고순도화 기술 등 다양한 적용 분야에 대해 살펴보고자 한다. 미생물전기합성은 온실가스의 재활용 및 고부가화 기술로서 향후 지속가능한 공정개발에 기여할 것으로 기대된다.
이산화탄소로부터 생물전기화학적 아세트산 생산을 위한 미생물 농화배양 및 군집 분석
김준형(Junhyung Kim),김영은(Young-Eun Kim),박명화(Myeonghwa Park),송영은(Young Eun Song),설은희(Eunhee Seol),김중래(Jung Rae Kim),오유관(You-Kwan Oh) 한국신재생에너지학회 2020 신재생에너지 Vol.16 No.1
Microbial electrosynthesis has recently been considered a potentially sustainable biotechnology for converting carbon dioxide (CO₂) into valuable biochemicals. In this study, bioelectrochemical acetate production from CO₂ was studied in an H-type two-chambered reactor system with an anaerobic microbial consortium. Metal-rich mud flat was used as the inoculum and incubated electrochemically for 90 days under a cathode potential of -1.1 V (vs. Ag/AgCl). Four consecutive batch cultivations resulted in a high acetate concentration and productivity of 93 m㏖/L and 7.35 m㏖/L/day, respectively. The maximal coulombic efficiency (rate of recovered acetate from supplied electrons) was estimated to be 64%. Cyclic voltammetry showed a characteristic reduction peak at -0.2~-0.4 V, implying reductive acetate generation on the cathode electrode. Furthermore, several electroactive acetate-producing microorganisms were identified based on denaturing- gradient-gel-electrophoresis (DGGE) and 16S rRNA sequence analyses. These results suggest that the mud flat can be used effectively as a microbial source for bioelectrochemical CO₂ conversion.