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개발도상국 맞춤형 정수처리를 위한 수중 이온물질 제거용 이온교환섬유 성능평가에 관한 연구
여인설 ( In-seol Yeo ),조은영 ( Eun-young Jo ),박재로 ( Jae-roh Park ),오현제 ( Hyun-je Oh ),이성재 ( Sung-jae Lee ),박찬규 ( Chan-gyu Park ) 한국수처리학회 2016 한국수처리학회지 Vol.24 No.2
In case of developing countries, the amount of available water resources is lacking compared to the population distribution. In addition, since they have relatively low economic level, environmental awareness and a lot of outdated facilities, it is important to introduce appropriate technology without a large cost to purify. In this study based on the preceding experiment it was performed to evaluate the performance of the ion exchange module for application of customized water treatment system in developing countries. All tests were conducted in a batch test that evaluates the adsorption properties, removal efficiency with different dosage, removal efficiency depending on time variation, interference effects and renewable experiment. Experimental results in terms of changing the dose of the ion exchange fiber tended to match generally the Langmuir adsorption isotherm that is based on monolayer adsorption. When the media dose was increased above 2 g/L, it is possible to remove the high concentration of contaminants. In addition, ionic contaminants from aqueous system has been removed generally in a short time and efficiently removed without interference effects. When using a NaCl solution, it was confirmed that regeneration is possible.
유해 중금속 제거를 위한 소규모 정수처리용 여재 성능평가 연구
여인설 ( In-seol Yeo ),박승민 ( Seung-min Park ),박재로 ( Jae-roh Park ),오현재 ( Hyun-je Oh ),박찬규 ( Chan-gyu Park ) 한국수처리학회 2016 한국수처리학회지 Vol.24 No.3
In case of Mongolia, even though awareness of the water environment is gradually increased, it is not easy to receive the supply of clean water due to the shortage of water treatment facilities and specialized personnel aging. In addition, ground water quality is also poor with lots of mineral contents including hazardous heavy metal ions. Thus, small-scale water treatment package system, which has considered to design high work performance, portability, low cost and easy replacement, is consist of adsorbent module using alum sludge and zeolite. In this study, batch adsorption tests were conducted using alum sludge and zeolite with heavy metal ions such as arsenic, iron and manganese in order to evaluate applicability in the package system. In the results of experiment, although there are differences of removal rate in accordance with the substance, alum sludge hold great potential to remove cationic and anionic heavy metal species simultaneously with zeolite. Thus, when it applies to small scale water treatment package system in Mongolia, it is able to remove hazardous heavy metal ions effectively.
선박용 대기오염장치 폐세정수 내 질산염의 선택적 제거를 위한 이온교환수지 공정 성능 평가
김봉철(Kim, Bong-Chul),여인설(Yeo, In-Seol),박찬규(Park, Chan-Gyu) 대한토목학회 2021 대한토목학회논문집 Vol.41 No.4
2020년 1월 1일부터 국제해사기구(International Maritime Organization, IMO)는 선박 대기오염 규제를 지속적으로 강화하고 있으며, 배출규제해역이 아닌 일반해역을 운항하는 전 세계 모든 적용대상 선박에 대하여 황함유량 0.5 %를 초과하지 않는 연료유를 사용하거나 이에 준하는 대기오염 배출기준을 만족하도록 결정하였다. 최근 습식 스크러버를 통한 본 규정의 대기오염 배출기준을 만족시키려는 연구가 진행되고 있으나, 이 기술은 폐세정수를 동시에 유발하는 문제점이 있다. 본 연구에서는 국제해사기구의 폐세정수 배출 기준을 준수하기 위한 이온교환수지 공정의 성능을 평가하였다. 모사폐세정수를 사용하여 실험실 규모의 회분식 및 연속식 실험을 진행하였다. 실험 결과 모사폐세정수의 높은 총용존고형물에도 불구하고 이온교환수지 특성에 따라 선택적으로 질산염의 제거가 효율적으로 이루어짐을 확인하였다. 추가적으로 다양한 운영조건을 최적화함에 따라서 제거 효율을 개선할 수 있었으며, 이를 통하여 국제해사기구의 폐세정수 배출수 수질 기준을 만족할 수 있을 것으로 판단된다. From 1 January 2020, the limit for Sulphur in fuel oil used on board ships operating outside designated emission control areas will be reduced to 0.5 %. This regulation by international maritime organization (IMO) is able to significantly reduce the amount of Sulphur oxides (SOx) discharging from ships and should have environmental advantages and health for all over the world. To meet the regulation, in these days, wet scrubber system is being actively developed. However, this process leads to make washing wastewater. In this study, we evaluated ion exchange resin system in accordance with scrubber wastewater discharge regulation by IMO. Theoretical wastewater used as feed solution of lab scale water treatment systems. The results revealed that nitrate ion was removed selectively in spite of high TDS wash wastewater solution depending on ion exchange resin property. Moreover, it was possible to improve efficiency of the system by optimizing operating conditions.
하수처리수를 이용한 대수층 함양관리 기술(Managed Aquifer Recharge)에서 유기물과 의약화합물 제거
임훈철(Hun Cheol Im),여인설(In Seol Yeo),맹승규(Sung Kyu Maeng),최희철(Hee Chul Choi) 大韓環境工學會 2015 대한환경공학회지 Vol.37 No.3
본 연구에서는 장성에 위치한 황룡강에서 채취한 모래를 이용하여 유기물질과 의약화합물 제거효율을 평가하고 의약화합물의 제거 메커니즘을 규명하고자 하였다. 회분식 실험 및 칼럼 실험으로 대수층 함양관리기술을 모사하였으며, 모든 실험은 담양 하수처리장의 의약화합물이 포함된 최종방류수를 원수로 하여 구동하였다. 회분식 실험 및 칼럼 실험을 통해유기물질과 의약화합물은 토양 유기물질과 미생물 활성도에 영향을 받아 제거되는 것을 보였다. 유기물질 제거는 생물학적 조건에서 잘 되는 것으로 나타났다. 중성과 양이온 의약화합물(iopromide, estrone 및 trimethoprim)의 경우에는 일반 모래, 구운 모래를 사용한 회분식 실험 모두 70% 이상의 제거효율을 나타냈다. 반면, carbamazepine의 경우는 회분식과 칼럼 실험에서 제거가 잘 이루어지지 않았다. 음이온 의약화합물 (ketoprofen, ibufrofen 및 diclofenac)의 경우 모래 표면의 SOM과 미생물 활성도에 영향을 받아 제거가 되는 것을 보였다. 회분식과 칼럼 실험을 바탕으로 생물학적 영향과 수착이 대수층 함양관리 기술에서 의약화합물 제거에 주요한 메커니즘으로 나타났다. This study was conducted to evaluate the removal efficiencies of organic matter and pharmaceuticals and to identify the removal mechanism of pharmaceuticals using sand obtained from Hwangryong River in Jangsung. Batch and column studies were used to simulate managed aquifer recharge (MAR) systems. All experiments were performed using field effluent containing pharmaceuticals from Damyang Wastewater Treatment Plant as an influent. Based on the removal results of organic matter and pharmaceuticals from the batch and column experiments, soil organic matter (SOM) and microbial activity were found to effectively remove target contaminants. The removal of organic matter was found to increase under biotic conditions. Neutral and cation pharmaceuticals (iopromide, estrone, and trimethoprim) exhibited removal efficiencies higher than 70% from natural sand and baked sand media in batch and column studies. Carbamazepine persisted in the sand batch and column studies. Anion pharmaceuticals (ketoprofen, ibuprofen, and diclofenac) can be removed under conditions featuring high SOM and adenosine triphosphate (ATP)concentrations in the sand surface. Based on the experimental Batch and column results, biodegradation and sorption were found to be important mechanisms for the removal of pharmaceuticals within the simulated MAR systems.