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재이용한 산업부산물에 의한 비소(V) 이온 흡착능 평가
박연종,양재규,최상일,Park, Youn-Jong,Yang, Jae-Kyu,Choi, Sang-Il 한국지하수토양환경학회 2007 지하수토양환경 Vol.12 No.4
본 연구에서는 화학회사에서 발생되는 연마분진 폐기물의 흡착제로서의 재이용성을 평가하였다. 연마분진을 $550^{\circ}C$에서 하소시킴으로서 유기불순물을 제거하였다. 연마분진내의 주요 무기물은 Al이었으며 하소 후 Al 함량은 29.09%에서 52.73%로 증가되었다. 하소 후 시료의 안정성 평가를 실시한 결과 pH 2.0의 강한 산성조건에서도 모든 중금속들의 용출량은 0.3 mg/L 이하로 나타났다. pH 변화에 따른 As(V) 흡착실험에서 As(V)의 흡착효율은 전형적인 음이 온형 흡착경향을 보였다. 하소된 연마분진의 주입량 변화에 따른 As(V)의 등온흡착 실험결과는 Freundlich 등온흡착식이 Langmuir 등온흡착식보다 상대적으로 잘 표현되는 것으로 나타났다. Freundlich 등온흡착상수 K와 1/n은 각각 4.2442와 0.3161로 얻어졌다. Langmuir 등온흡착식으로 얻어진 하소된 연마분진의 최대 As(V) 흡착량은 13.25 mg/g이었다. 이러한 연구결과, 하소된 연마분진은 안정도 및 As(V) 흡착능을 고려하였을 때 재이용성이 양호한 흡착제로 나타났다. This study provides an attempt to evaluate sanding wastes, generated from a chemical company as a reused adsorbent. Organic impurities in the raw sanding wastes were removed by calcination at $550^{\circ}C$. Aluminum was a major inorganic composition in the raw sanding wastes and increased from 29.09% to 52.73% after calcination. Dissolved concentrations of heavy metals from the calcined sample were below 0.3 mg/L in a stability test at pH 2. From the pH-edge adsorption experiments with the calcined sanding wastes, As (V) was found to follow an anionic-type adsorption. Adsorption isotherm obtained with variation of the dosage of the calcined sanding wastes was better described by Freundlich equation than Langmuir one. Freundlich constants of K and 1/n were 4.244 and 0.316, respectively. The As (V) adsorption capacity of calcined sanding wastes estimated from Langmuir isotherm was 13.25 mg/g. From this study, the calcined sample was identified as a good reusable adsorbent in the view point of stability and adsorption capacity on As (V).
무정형 알루미늄 산화물에 의한 양이온 중금속의 표면착화
박연종,양재규,최상일,Park, Youn-Jong,Yang, Jae-Kyu,Choi, Sang-Il 한국지하수토양환경학회 2008 지하수토양환경 Vol.13 No.1
국내 화학회사에서 발생되는 연마분진 폐기물에 대한 흡착제로서의 재이용성을 평가하기 위하여 연마분진을 $550^{\circ}C$에서 하소시켜 얻어진 무정형 알루미늄 산화물(AMA-L)을 이용하여 양이온 중금속인 구리, 카드뮴, 납 등에 대한 흡착특성을 파악하였으며 MINEQL + 프로그램을 적용하여 AMA-L과 양이온 중금속 이온간의 표면흡착결합 반응을 모사하여 흡착실험결과와 비교하였다. 구리와 카드뮴, 납의 단일성분에 대한 AMA-L의 흡착실험결과, 납 > 구리 > 카드뮴의 순서로 친화력의 차이가 발생하는 것을 확인하였다. 구리와 카드뮴의 농도변화에 따른 AMA-L 흡착실험 결과 구리와 카드뮴의 농도를 증가시킴에 따라 두 성분의 흡착효율은 모두 감소되는 것으로 나타났으며 구리와 카드뮴이 동시에 존재하는 이성분계 흡착의 경우에는 단일성분으로 존재하는 경우와 유사한 흡착율을 나타내었으며 경쟁이온의 영향을 거의 받지 않는 것으로 확인이 되었다. 또한, AMA-L에 대한 흡착특성에 대한 MINEQL+를 이용한 모사결과 단일성분과 이성분계 흡착에 대한 흡착특성은 비교적 잘 일치하는 것으로 나타났다. The adsorption characteristics of cationic metals such as copper, cadmium, and lead onto the amorphous aluminum oxide, AMA-L, which was mineralized from raw sanding powder at $550^{\circ}C$ were investigated. Additionally, surface complexation reaction of cationic heavy metals onto AMA-L was simulated with MINEQL + software employing a diffuse layer model. From the batch adsorption tests in a single element system, the adsorption affinity of each metal ion onto AMA-L was following order: lead > copper > cadmium. In a binary system composed with copper and cadmium, quite a similar adsorption affinity was observed in each metal ion compared to the single element system. When the surface complexation constants obtained in the single system were used in the prediction of experimental adsorption results, model predictions were well fitted with experimental results of both single and binary systems.
유기견운모 센서를 이용한 As(III) 측정 최적 조건 연구
김무늬 ( Munui Kim ),양재규 ( Jae-kyu Yang ),박연종 ( Youn-jong Park ),이승목 ( Seung-mok Lee ) 한국수처리학회 2016 한국수처리학회지 Vol.24 No.3
In this study, the optimum conditions of working electrode with using organo-sericite was evaluated for the determination of As(III). The experimental results indicated that the peak currents of As(III) were increased as the size of sericite powders which were mixed in manufacturing for the organo-sericite electrode was decreased. The currents using polyether ether ketone (PEEK) as a support material for the electrode was considerably enhanced 12 times higher than that of the teflon material. The mixing ratios of raw materials for manufacturing the electrode were varied and the optimum ratio was obtained as the nujoil oil was 1.5 g and the organo-sericite was 15 wt%. Under the obtained optimum conditions, the peak currents were correlated well with the concentration of As(III) and it showed that As(III) levels down to 1 ppb were successfully analyzed. It concluded that the organo-sericite could be applied well to the determination of trace level of As(III) in aqueous solution.
생물반응조와 막이 결합된 공정에서 분말활성탄의 투입이 염색폐수 처리효율에 미치는 영향
황규대(Gye Dae Whang),임근택(Geun Tae Lim),박연종(Youn Jong Park) 한국물환경학회 1999 한국물환경학회지 Vol.15 No.4
The purpose of this study was to investigate the effect of PAC dose on treatment efficiency of membrane-bioreactor(Membrane-PACT) for dyeing wastewater treatment. Membrane-bioreactor process consisted of a suspended growth bioreactor and a tubular ceramic microfiltration unit. Powdered activated carbon was added into the bioreactor to maintain the concentration of 2,000㎎/L to evaluate the effectiveness and to find optimum dosage of carbon for removal of organic matter and coloring stuff. Activated sludge reactor(AS) and powdered activated carbon activated sludge reactor(PAC-AS) were operated as a control reactor to compare the treatment efficiency with membrane- bioreactor with activated carbon. Addition of PAC into the bioreactor does not affect the membrane flux significantly. Higher removal efficiency of soluble organic matter and coloring stuff was observed from membrane bioreactor with activated carbon and powdered activated carbon activated sludge reactor. It showed that the improvement of removal efficiency of organic matter was due to the elevation of biodegradability of microorganisms owing to PAC addition. However, the improvement of color removal efficiency was due to the adsorption of PAC. Membrane bioreactor with PAC showed higher soluble organic matter and color removal efficiency. At the beginning of operation, soluble organic matter and color removal efficiency was about 96% and 975 respectively. However, this high removal efficiency decreased to 77%, 56% respectively after 25days of operation due to the accumulation of organic matter and coloring stuff in bioreactor. Sludge withdrawing from Membrane-PACT process was found to enhance the color removal by adding virgin carbon and maintaining proper concentration of microorganisms. However, this operating strategy does not improve removal efficiency of soluble organic matter significantly.
재활용 알루미늄 산화물을 이용한 수처리용 여재 제조방법 및 비소제거
이희용 ( Hee Yong Lee ),이남희 ( Nam Hee Lee ),김근한 ( Kuen Han Kim ),양재규 ( Jae Kyu Yang ),박연종 ( Youn Jong Park ),민경철 ( Kyung Chol Min ),이승목 ( Seung Mok Lee ) 한국수처리학회 2010 한국수처리학회지 Vol.18 No.6
In this study, the potential recycle of industrial wastes containing aluminum hydroxide generated during the sanding and sawing process in a local chemical company in Korea was evaluated. Aluminum oxide and gibbsite was prepared from the calcination of raw industrial waste containing aluminum hydroxide at different temperature. Four different filter media as a bead form were prepared at different ratio of alumina and gibbsite. Physicochemical properties of the prepared filter media were evaluated by FE-SEM analysis, compressive strength measurement and BET surface area analysis. As the ratio of gibbsite increased, compressive strength of filter media increased while the specific surface area was decreased. As(V) adsorption onto the filter media was followed a typical anionic type adsorption behavior.
재생 알루미늄 산화물과 TiO2의 복합성형체를 이용한 비소 흡착 특성
민경철 ( Kyung Chul Min ),이승목 ( Seung Mok Lee ),김근한 ( Keun Han Kim ),이희용 ( Hee Yong Lee ),양재규 ( Jae Kyu Yang ),박연종 ( Youn Jong Park ) 한국물환경학회 2012 한국물환경학회지 Vol.28 No.2
The objective of this study was to evaluate the removal efficiency of arsenite and arsenate using composite adsorbents with various mixing ratio of recycled aluminum oxides and TiO2. From batch adsorption experiments, while the removal of As(III) was almost same with 4 different composite samples in the entire pH range, the removal of As(V) was substantially increased as the weight ratio of TiO2 in composite samples reduced and showed anionic adsorption characteristics. Both adsorption of As (III) and As(V) on composite samples followed pseudo-second-order adsorption equation and C-3 showed faster reaction rate for the removal of arsenic. From the adsorption isotherm experiments, Langmuir isotherm explained well and the maximum adsorption capacities of arsenic were obtained with C-1.