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활성탄/플리우레탄 복합담체를 충전한 바이오필터에서 H₂S의 제거특성
감상규,강경호,임진관,이민규 한국환경과학회 2004 한국환경과학회지 Vol.13 No.1
A biofiltration system using activated carbon/polyurethane composite as solid support inoculated with Bacillus sp. was developed for treating a gaseous stream containing high concentrations of H₂S. The effects of operating condition such as the influent H₂S concentration and the empty bed contact time (EBCT) on the removal efficiency of H₂S were investigated. The biofilter showed the stable removal efficiencies of over 99 % under the EBCT range from 15 to 60 sec at the 300 ppmv of H₂S inlet concentration. When the inlet concentration of H₂S was increased, the removal efficiencies decreased, reaching 95 and 74%, at EBCTs of 10 and 7.5 sec, respectively. The maximum elimination capacity in the biofilter packed with activated carbon/polyurethane composite media was 157 g/m³/hr.
Biosorption in the Mixed Heavy Metal Solution by Biosorbents of Marine Brown Algae
감상규,이동환,이회근,이민규 ( Sang Kyu Kam,Dong Hwan Lee,Whae Geon Lee,Min Gyu Lee ) 한국공업화학회 1997 한국공업화학회 연구논문 초록집 Vol.1990 No.3
N/A The biomass of nonliving, dried marine brown algae U. pinnatifida, H. fusiforme, and S. fulvelum harvested in the sea near Cheju, were studied for their sorption performance and selectivity of copper, zinc, lead, and chromium. The metal uptakes by biosorbent materials increased with increasing pH in the range of Ci 10-500㎎/L. The metal uptakes by biosorbent materials decreased in the following sequence: Pb>Cr>Cu>Zn. Among the biosorbent materials the decreasing order was as follows: U. pinnatifida≥H. fusiforme>S. fulvelum for copper and zinc; U. pinnatifida>H. fusiforme>S fulvelum for lead and chromium. The metal uptakes(except for lead) by biosorbent materials in the mixed solution, decreased greatly in comparison to those in the single solution.
제주도 성산항내 부틸주석화합물의 분포와 생물체에 미치는 영향
감상규,안이선,고병철,조은일,이기호 한국환경과학회 2000 한국환경과학회지 Vol.9 No.4
Butyltin compounds (BTs) in seawater, sediments and organisms (Thais clavigera, Liolophura japonica and Cellana nigrolineata), were quantitatively determined to evaluate their distribution inside Songsan Harbor of Cheju Island. In addition, imposex in T. clavigera was used to assess the effect on organisms of BTs. Analysis of the samples collected in seawater, sediments (March, June and August) and organisms (May, July and August) in 1998, confirmed the contamination of BTs in the aquatic environment inside Songsan Harbor. The main BTs species in seawater and sediments was monobutyltin (MBT), tributyltin (TBT), respectively, irrespective of survey time. In organisms, TBT and dibutyltin (DBT) were detected in similar concentrations for T. clavigera and L. japonica, but for C. nigrolineata, DBT concentration was the highest. TBT, the most toxic to aquatic organisms among BTs, was found at concentrations which were sufficient to have a serious effect on the sensitive organisms upon chronic exposure. The relatively high correlations (r>0.83) between BTs indicated that DBT and MBT were mainly degraded from TBT based on antifouling paint and their sources were negligible. The sedimentary organic matters did not have influence on the distribution of BTs in marine environment, and lipid content in T. clavigera did not show a correlation with TBT concentrations. The rate of occurrence of imposex in T. clavigera was 100 %, and the relative penis length index (RPLI) and the relative penis size index (RPSI) which represent the degree of imposex were 79.7%, 58.1%, respectively. Measurement of imposex in T. clavigera was expected to be a very helpful tool for preliminary survey of BTs prior to trace analysis of BTs.
감상규,김현정,허철구,최영찬,이민규 한국환경과학회 2003 한국환경과학회지 Vol.12 No.7
Butyltin compounds (BTs), namely tributyltin (TBT), dibutyltin (DBT) and monobutyltin (MBT), were measured in surface sediments collected in 2001 inside Hallim Harbor where a lot of shipping occurs as one of major harbors of Jeju Island, in order to evaluate their distribution. BTs were detected in surface sediments of all stations and their concentrations were comparable to those in surface sediments of other sites of domestic and foreign countries. The main species among BTs was MBT, although there was a little difference with a survey site. No correlations were obtained between organic matter or particles size of surface sediments and total BTs, indicating that these factors did not affect on the distribution of BTs. It was estimated that more complex factors including BTs loads and surrounding sedimentary environments, affected on the distribution of BTs. The high correlations between BTs indicated that DBT and MBT were mainly degraded from TBT based on antifouling paints of vessel etc. and other sources, such as DBT and MBT, could be ignored. The butyltin degradation indexes ([DBT] + [MBT]/[TBT]) were in the range of 1.5~3.3 (mean 2.5), indicating that the parent compound, TBT, were inflowed into the surface sediments a long years ago and degraded.
석탄회로 합성한 제올라이트에 의한 Sr(Ⅱ) 및 Cs(Ⅰ) 이온의 제거 특성
감상규,이동환,문명준,이민규 한국환경과학회 2003 한국환경과학회지 Vol.12 No.10
The adsorption behaviors of strontium and cesium ions on fly ash, natural zeolites, and zeolites synthesized from fly ash were investigated. The zeolites synthesized from fly ash had greater adsorption capabilities for strontium and cesium ions than the original fly ash and natural zeolites. The maximum adsorption capacity of synthetic zeolite for strontium and cesium ions was 100 and 154 ㎎/g, respectively. It was found that the Freundlich isotherm model could fit the adsorption isotherm. The distribution coefficients (K_(d)) for strontium and cesium ions were also calculated from the adsorption isotherm data. The distribution coefficients decreased with increasing equilibrium concentration of strontium and cesium ions in solution. By studying the removal of cesium and strontium ions in the presence of calcium. magnesium, sodium. potassium. sulfate, nitrate, nitrite, and EDTA (in the range of 0.01 - 5 mM) it was found that these coexistence ions competed for the same adsorption sites with strontium and cesium ions.
합성 Goethite에 의한 인산이온, 황산이온 및 구리이온의 혼합용액에서의 흡착특성
감상규,이동환,이민규 한국환경과학회 2003 한국환경과학회지 Vol.12 No.10
Adsorption on goethite of individual component from a solution containing phosphate, sulfate, or copper ion was investigated. Competitive adsorption in the binary and ternary solution systems composed of phosphate, sulfate. and copper ions was also investigated. In competitive adsorption systems with phosphate and sulfate ions. the presence of phosphate ion reduced the adsorption of sulfate ion largely. On the other hand. the presence of sulfate ion caused only a small decrease in phosphate adsorption. This result suggests that phosphate ion is a stronger competitor for adsorption on goethite than sulfate ion. which is consistent with the higher affinity of phosphate for the surface compared to sulfate ion. Compared to the results from single-sorbate systems, adsorption of copper ion in the binary system of sulfate ion and copper ion was found to be enhanced in the presence of sulfate ion. Addition of sulfate ion to the binary system of copper ion and phosphate ion resulted in a small enhancement in copper sorption. This result implies that the presence of sulfate ion promotes adsorption of the ternary complex FeOHCuSO₄. The adsorption isotherms could be well described by the Langmuir adsorption equation.