http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
천연광물 흡착제 및 고염기도 PAC를 이용한 용존성 Cs의 처리특성
김복성(Bokseong Kim),김영석(Youngsuk Kim),정윤선(Yoonsuhn Chung),강성원(Sungwon Kang),오대민(Daemin Oh),채호준(Hojun Chae) 대한환경공학회 2017 대한환경공학회지 Vol.39 No.7
응집 침전기술인 방사능 오염물질의 처리장치의 용존성 Cs 처리특성을 평가하였다. 방사능 오염물질 처리장치는 전흡착부, 고형물침전부, 후흡착부로 구성하였다. 흡착제는 천연광물 일라이트를 입자크기에 따라 LPI (Large Particle Illite), SPI (Small Particle Illite)로 구분하여 사용하였고, 응집제는 고염기도 PAC (poly aluminum chloride)을 사용하였다. 흡착제는 판상구조형태로 주로 석영, 조장석, 백운모로 구성되었으며, LPI, SPI의 Surface area는 각각 4.201 m²/g, 4.227 m²/g으로 나타났고 입자크기는 각각 197.4-840.9 μm, 3.28-53.57 μm로 나타났다. 천연광물인 일라이트의 흡착효율은 LPI는 82.8%, SPI는 85.6%로 나타났고 흡착제 회수에 대한 간접적인 지표인 탁도의 제거율은 96.4%, 98.3%로 나타났다. This study investigated removal characteristic of soluble Cs in water by RPT (Radioactivity pollutant treatment) with coagulation and sedimentation. The RPT conducted with various chemical and natural coagulants to remove the soluble Cs which consisted pre-adsorption, Sedimentation and post-adsorption. Natural absorbent included Illite and zeolite. Especially, Illite divided LPI (Large Particle Illite) and SPI (Small Particle Illite) by grain size. Also, Chemical coagulants included high basicity PAC (poly aluminum chloride). The adsorbent had a plate structure mainly composed of quartz, albite and muscovite. The surface area were 4.201 m²/g and 4.227 m²/g and the particle sizes were 197.4-840.9 μm and 3.28-53.57 μm, respectively. The adsorption efficiency of the natural Illite was 82.8% for LPI and 85.6% for SPI. The removal efficiency of turbidity, which was an indirect indicator of adsorbent recovery, was 96.4% and 98.3%, respectively.
프러시안블루 및 유기점토 함유 하이드로겔 비드의 세슘 및 요오드 제거 특성
김복성 ( Bokseong Kim ),강성원 ( Sungwon Kang ) 한국수처리학회 2021 한국수처리학회지 Vol.29 No.6
Radiation severely damages the environment in the event of a radioactive explosion, such as the one that occurred at the Fukushima nuclear power plant in 2011. Radioactive cesium and radioactive iodine, in particular, are known to be the main causes of environmental pollution. This study aimed to develop a composite adsorbent that can remove Cs<sup>+</sup> and I<sup>-</sup> from a waterbody simultaneously. Prussian blue (PB) and organoclay are known to be effective in adsorbing cesium and iodide, respectively. Therefore, an organoclay-PB in alginate (OPAL) bead with layer-by-layer synthesis was developed. Fourier-transform infrared (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and thermogravimetric (TG) analyses were used to determine if organoclay and PB were synthesized in the OPAL bead. According to the isothermal adsorption experimental results, the maximum adsorption capacity of Cs<sup>+</sup> and I<sup>-</sup> obtained using the Langmuir isotherm model was 26.4 and 3.39 mg/g, respectively. The adsorption rate of Cs<sup>+</sup> on the OPAL bead was found to be fast in a dual solute adsorption system. The adsorption capacity of the single and dual solute adsorption systems for Cs<sup>+</sup> ions increased rapidly up to 1 h, and the adsorption equilibrium was attained 3 h later. The dual solute adsorption system had a higher adsorption rate for I- ions. This demonstrates that the developed composite adsorbent can be used to remove Cs<sup>+</sup> and I<sup>-</sup> from water simultaneously.