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.

Study on the Charge Determination of Synthetic Cationic Polymers

감상규,김정호,이민규 ( Sang Kyu Kam,Jung Ho Kim,Min Gyu Lee ) 한국공업화학회 1997 한국공업화학회 연구논문 초록집 Vol.1990 No.3

N/A Visual titrimetry, spectrophotometry, and streaming current detector(SCD) method for end point detection are described for the charge determination of the synthetic cationic polymers of different charge density and molecular weight. The charge densities for each of the cationic polymers by spectrophotometry and SCD method were in good agreement with each other. The results obtained by visual titrimetry are less reliable, compared to other methods, especially for polymers low charge density. With spectrophotometry and SCD method, the titration curves have a sharp break point in the range of the end point reaction for polymers of high charge density, which becomes rather less sharp for polymers of lower charge density. The charge densities for polymer A-L, which are copolymers of polyacrylamide and dimethylaminoethyl acrylate, show pH dependence, becoming lower as pH increases, but the charge density of polydiallyldimethylammonium chloride are independent of pH in the pH range investigated.

제주도 지하수 질산염 농도의 시·공간적 변화 특성: 장기(1993-2015) 모니터링 자료의 평가

김호림(Ho-Rim Kim),오준섭(Junseop Oh),도현권(Hyun-Kwon Do),이경진(Kyung-Jin Lee),현익현(Ik-Hyun Hyun),오상실(Sang-Sil Oh),감상규(Sang-Kyu Kam),윤성택(Seong-Taek Yun) 대한자원환경지질학회 2018 자원환경지질 Vol.51 No.1

1993년부터 2015년까지 관측된 제주도 지하수 장기모니터링 관측정(N = 4,835)에서 수집된 지하수 수질자료(N = 21,568)를 기반으로 질산성질소의 시공간적 변동 특성을 평가하였다. 제주도 지하수의 질산성질소 농도의 중앙값은 2.5 mg/L로서 다른 국가나 대륙의 조사 결과에 비해 다소 높거나 유사한 것으로 나타났다. 또한 지하수 용도, 행정구역 및 고도 별로 유의한 차이를 보였다. 특히, 산간 지역에 비해 저지대 해안가에 위치한 농업 및 주거지역에서 농도가 높음을 확인하였다. Mann-Kendall 및 Sen’s slope 분석을 활용한 질산성질소 농도의 추세 분석 결과, 하류 저지 대에 비해 중산간지역에서의 질산성질소 농도 증가 경향이 뚜렷하였다. 제주도 내 토지 피복의 시계열 변화 특성과 결부 지어 보면, 중산간지역의 오염 증가 추세는 농업지역의 확장 등 인위적 활동 증가에 기인한 결과로 판단된다. 반면,기지정된 지하수자원특별관리구역에서는 전반적으로 질산성질소 농도의 감소 경향이 나타났는데, 이는 지하수 관리 측면에서 수질관리를 위한 적극적인 정책이 유효함을 시사한다. 본 연구에서는 제주도 지하수의 질산성질소 오염관리를 위한 적정 방안을 제안한다. The spatio-temporal variations of nitrate concentrations in groundwater of Jeju Island were evaluated by an analysis of time series groundwater quality data (N = 21,568) that were collected from regional groundwater monitoring (number of wells = 4,835) for up to 20 years between 1993 and 2015. The median concentration of NO 3 -N is 2.5 mg/L, which is slightly higher than those reported from regional surveys in other countries. Nitrate concentrations of groundwater in wells tend to significantly vary according to different water usage (of the well), administrative districts, and topographic elevations: nitrate level is higher in low-lying agricultural and residential areas than those in high mountainous areas. The Mann-Kendall trend test and Sen’s slope analysis show that nitrate concentration in mid-mountainous areas tends to increase, possibly due to the expansion of agricultural areas toward highland. On the other hand, nitrate concentrations in the Specially Designated Groundwater Quality Protection Zones show the temporally decreasing trend, which implies the efficiency of groundwater management actions in Jeju. Proper measures for sustainable groundwater quality management are suggested in this study.

[화학]Spectrophotometric Determination of Trace Amount of Sulfide by Formation of Iodide and Its Solvent Extraction with Mehtylene Green

감상규(Sang-Kyu Kam),김경연(Kyung-Youn Kim) 한국분석과학회 1994 분석과학 Vol.7 No.3

연구논문 : Polysulfone에 Di-(2-ethylhexyl)phosphoric acid(D2EHPA)와 tri-butyl-phosphate(TBP)를 고정화하여 제조한 고체상 추출제에 의한 Sr(2)의 제거특성

감상규 ( Sang Kyu Kam ),전진우 ( Jin Woo Jeon ),이민규 ( Min Gyu Lee ) 한국환경과학회 2015 한국환경과학회지 Vol.24 No.3

The feasibility of PS-D2EHPA/TBP beads prepared by immobilizing two extractants D2EHPA and TBP in polysulfone to remove Sr(II) from aqueous solution was investigated in batch system. Batch experiments were carried out to study equilibrium isotherms, kinetics, and thermodynamics. Equilibrium data were fitted using Langmuir, Freundlich, Redlich. Peterson, and Dubinin-Radushkevich equation models at temperatures of 298 K, 313 K, and 328 K. The removal capacity of Sr(II) by PS-D2EHPA/TBP beads obtained from Langmuir model was 2.41 mg/g at 298 K. The experimental data were well represented by pseudo-second-order model. The removal process of Sr(II) by PS-D2EHPA/TBP beads prepared in this study was found to be feasible, endothermic, and spontaneous.

D2EHPA와 TBP를 PVC에 고정화한 고체상 추출제를 사용한 수용액 중의 Cu(II) 이온 제거특성

감상규 ( Sang Kyu Kam ),이송우 ( Song Woo Lee ),이민규 ( Min Gyu Lee ) 한국환경과학회 2015 한국환경과학회지 Vol.24 No.1

Removal characteristics of Cu(II) ions by solid-phase extractant immobilized D2EHPA and TBP in PVC were investigated. Cu(II) ion concentrations in the solution and removal capacity of Cu(II) ion according to operation time were compared. The lower the initial concentration of Cu(II) ion in aqueous solution was, the removal capacity of Cu(II) ion by solid-phase extractant was increased relatively. The bigger the initial concentration of Cu(II) ion was, the removal capacity of Cu(II) ion was increased relatively. The pseudo-second-order kinetics according to operation time was showed more satisfying resultsthan the pseudo-first-order kinetics for the removal velocity of Cu(II) ion. The removal capacity of Cu(II) ion was 0.025 mg/g in aqueous solution of pH 2, but the removal capacity of Cu(II) ion was increased to 0.33 mg/g mg/g in aqueous solution of pH 4 according to increasing pH.

NaA 형 제올라이트를 이용한 수중의 Sr 이온 제거에서 회분식 및 연속식 운전 특성

감상규(Sang-Kyu Kam),이창한(Chang-Han Lee),이민규(Min-Gyu Lee) 대한환경공학회 2017 대한환경공학회지 Vol.39 No.9

NaA 제올라이트 분말(Z-PA) 및 펠렛(Z-BA)를 이용하여 수중의 Sr 이온의 흡착특성을 검토하였다. 회분식 실험에서 Z-BA와 Z-PA에 의한 Sr 이온의 흡착은 유사 1차식보다는 유사 2차식에 잘 부합되었고, 등온 흡착실험 결과는 Langmuir 등온식에 잘 부합하였으며, 이 등온식으로부터 구한 최대 흡착량은 Z-PA는 233.32 mg/g, Z-BA는 164.60 mg/g이었다. 연속식 실험에서 Sr 이온의 농도가 증가함에 따라 Sr 이온의 총 흡착량(q)는 증가하였으나 파과시간, 처리 부피(Veff) 및 총 제거율(R)은 감소하였다. 실험으로부터 구한 파과곡선은 Thomas 모델식에 의해 잘 모사되었다. The adsorption characteristics of Sr ion in aqueous solution was examined using zeolite NaA powder (Z-PA) and pellets (Z-BA). In batch experiment, the adsorption of Sr ions by Z-BA and Z-PA was well expressed by pseudo-second-order kinetic model than psedo-first-order kinetic model. Experimental isotherm results was well fitted to Langmuir isotherm model and the maximum adsorption capacities obtained from Langmuir isotherm model were 233.32 mg/g for Z-PA and 164.60 mg/g for Z-BA, respectively. The continuous experiment results showed that the total Sr ion uptake (q) increased, but the breakthrough time, effluent volume (Veff) and total removal (R) of Sr ion decreased with the Sr ion concentration. The breakthrough curves obtained from the experiment was modeled by Thomas model.

폐감귤박으로 만든 활성탄을 이용한 염료 Eosin Y 흡착에서 반응표면 모델링

감상규 ( Sang-kyu Kam ),이민규 ( Min-gyu Lee ) 한국공업화학회 2018 공업화학 Vol.29 No.3

반응 표면법(RSM)과 Box-Behnken 설계(BBD) 통계 방법을 사용하여 폐감귤박으로 만든 활성탄(WCAC)에 의한 염료Eosin Y의 흡착을 검토하였다. 실험은 Eosin Y의 농도(Conc. : 30~50 mg/L), 용액 온도(Temp. : 293~313 K) 및 흡착제투여량(Dose : 0.05~0.150 g/L)의 3가지 입력 변수를 가진 BBD에 따라 수행하였다. 염료 Eosin Y 제거에 대해 얻어진 2차 다항식 모델의 회귀분석 결정계수(R²) 값이 0.9851이고 적합성 결여(Lack of fit)의 p 값은 0.342로 실험 데이터는 2차 다항식 모델에 잘 부합하였다. 염료 농도 50 mg/L, 온도 333 K 및 흡착제 투여량 0.1056 g에서 최적 염료 흡착량59.3 mg/g이 얻어졌다. WCAC에 의한 Eosin Y의 흡착공정은 유사 2차 속도식에 의해 잘 기술되었으며, 등온 실험결과는 Langmuir 모델식을 따랐다. The adsorption of Eosin Y by the activated carbon (WCAC) prepared from waste citrus peel was investigated by using response surface methodology (RSM) and Box-Behnken design (BBD) statistical procedures. Experiments were carried out as per BBD with three input parameters, the Eosin Y concentration (Conc. : 30~50 mg/L), the solution temperature (Temp. : 293~313 K), and the adsorbent dose (Dose : 0.05~0.15 g/L). Regression analysis showed a good fit of the experimental data to the second-order polynomial model with coefficients of the determination (R²) value of 0.9851 and P-value (Lack of fit) of 0.342. An optimum dye uptake of 59.3 mg/g was achieved at the dye concentration of 50 mg/L, the temperature of 333 K, and the adsorbent dose of 0.1056 g. The adsorption process of Eosin Y by WCAC can be well described by the pseudo second order kinetic model. The experimental data followed the Langmuir isotherm model.

제주도 성산포항내 표층퇴적물 중의 PCBs의 오염현황

감상규(Sang-Kyu Kam),허륜용(Ryun-Yong Heo),조은일(Eun-Il Cho),이민규(Min-Gyu Lee) 한국해양환경·에너지학회 2017 한국해양환경·에너지학회 학술대회논문집 Vol.2017 No.4

고정화된 해양갈조류 톳에 의한 수중 납의 생물흡착 및 탈착

감상규(Sang Kyu Kam),김현정(Hyun Jeong Kim),이민규(Min Gyu Lee) 한국수처리학회 2001 한국수처리학회지 Vol.9 No.2

살아 있지 않은 건조한 해양 갈조류인 톳 생물질을 Ca-alginate법 (Ca-ALG), Ba-alginate법 (Ba-ALG) 및 polyethylene glycol법 (PEG) 등으로 고정화시켜, 각 고정화된 생물질에 의한 납의 생물흡착 및 탈착올 100∼1000㎎/L의 납의 농도와 0.15∼0.6g의 생물질의 양을 사용하여 회분식 반응기에서 검토하였다. 생물질의 양이 증가함에 따라 납의 제거능은 증가하였으나 흡착량은 감소하였다. 고정화된 생물질에 의한 납의 흡착량은 초기 납 농도가 증가함에 따라 증가하였고, pH 4∼5 부근에서 최대를 보였으며, 고정화법 사이에서는 Ca-ALG > Ba-ALG > PEG 순으로 감소하였다. 또한 이의 납 흡착 패턴은 Langmuir 흡착등온식보다는 Freundlich 흡착등온식에 적합함을 알 수 있었다. PEG를 제외한 Ca-ALG 및 Ba-ALG으로 고정화된 생물질에 대해 축적된 납은 0.1∼0.5M 염산 농도하에서 쉽게 탈착되었고, 계속적인 5회 흡·탈착 실험에서 흡착량이나 외부 형태에서 변화가 없었다. The biosorption and desorption of lead by the immobilized biomass of nonliving, dried marine brown alga Hizikia fusiformis by each of Ca-alginate method (Ca-ALG), Ba-alginate method (Ba-ALG), and polyethylene glycol method (YEG), were investigated using the lead concentration of 100-1000㎎/L and the biomass amoiunt of 0.15∼0.6g. As the biomass amount was increased, the lead removal performance increased, but its uptake decreased. The lead uptake by the immobilized biomass increased with increasing initial lead concentration, showed the maximum in the pH range of 4 to about 5, and decreased in the following sequences : Ca-ALG>Ba-ALG>PEG among the immobilization methods. The pattern of lead uptake by the immobilized biomass fitted the Freundlich isotherm better than the Langmuir isotherm. The deposited lead for the immobilized biomass prepared by Ca-ALG and Ba-ALG, was desorbed easily with 0.1-0.5M HCl, with no changes of the immobilized biomass lead uptake capacity and macroscopic appearance in five subsequent biosorption/desorption cycles, except for PEG.