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배연탈황시설 폐수에서 아황산에 의한 수은의 환원: 동역학 및 화학종 모델링
커트루이스솔리스 ( Kurt Louis B. Solis ),남고운 ( Go Un Nam ),홍용석 ( Yongseok Hong ) 한국폐기물자원순환학회(구 한국폐기물학회) 2016 한국폐기물자원순환학회 추계학술발표논문집 Vol.2016 No.-
The re-emission of mercury (Hg), as a consequence of the formation and dissociation of the unstable complex HgSO<sub>3</sub>, is a problem encountered in flue gas desulphurization (FGD) treatment in coal-fired power plants. A model following a pseudo-second-order rate law for Hg<sup>2+</sup> reduction was derived as a function of [SO<sub>3</sub> <sup>2-</sup>], [H<sup>+</sup>] and temperature and fitted with experimentally obtained data to generate kinetic rate values of (0.120 ± 0.04, 0.847 ± 0.07, 1.35 ± 0.4) mM<sup>-1</sup> for 40°, 60°, and 75℃, respectively. The reduction of Hg<sup>2+</sup> increases with a temperature increase but shows an inverse relationship with proton concentration. Plotting the model-fitted kinetic rate constants yields ΔH = 61.7 ± 1.82 kJ mol<sup>-1</sup>, which is in good agreement with literature values for the formation of Hg0 by SO<sub>3</sub> <sup>2-</sup>. The model could be used to better understand the overall Hg<sup>2+</sup> re-emission by SO<sub>3</sub> <sup>2-</sup> happening in aquatic systems such as FGD wastewaters.
폐수내 양이온 및 음이온성 중금속을 동시에 제거하는 금속유기물구조체-활성탄 혼합 흡착제 개발
커트루이스솔리스 ( Kurt Louis B. Solis ),권영환 ( Youngwhan Kwon ),김문현 ( Moonhyun Kim ),홍용석 ( Yongseok Hong ) 한국폐기물자원순환학회(구 한국폐기물학회) 2016 한국폐기물자원순환학회 추계학술발표논문집 Vol.2016 No.-
Adsorption using highly porous and highly functionalized sorbents is a straightforward removal technology currently being employed, however the range of contaminants is limited. A novel sorbent was synthesized from activated carbon and Zr-based UiO66 metal organic framework to remove both cationic and oxyanionic metals from aqueous solutions. The composite was characterized using FSEM-EDS, FT-IR, XRD, and TGA, and showed successful integration of UiO66 on the surface of activated carbon. Batch adsorption tests with ICP-OES reveal that the composite has removal efficiency >95% for Pb (II), Cu (II), Se (IV), and As (V). The hybrid material is a promising sorbent for the removal of both cationic and oxyanionic metals for wastewater purification.