연구발표논문초록 ( 에너지 , 환경 (2) ) : 다공성 세라믹에 의한 에멀젼상 유분흡착에 관한 연구

권이열,윤동준,김주영 ( Ee Yol Kwon,Dong Jun Yoon,Ju Young Kim ) 한국화학공학회 1987 추계학술발표회 Vol.- No.-

폐기된 콘크리트가 물의 pH 및 중금속에 미치는 영향

권이열,김미경,이성욱 ( Ee Yol Kwon,Mi Kyung Kim,Seong Uk Lee ) 한국물환경학회 1994 한국물환경학회지 Vol.10 No.1

On the study, the neutralization ability of acid water and the removal of heavy metals were experimentally considered with concrete obtained from dismantlement of the existing concrete structures. From the result of being contacted and reacted 0.0l00g of concrete on each on 200㎖ of nitric and sulfuric solution of pH 4.00 for 1 hour at 16℃, the pH value was obtained pH 6.69 and 6.82, respectively. For contact time, equilibrium of reaction was made in 2 hours for change of temperature, pH somewhat increased as the temperature rise. Being contacted and reacted 4.0000g of concrete in 100㎖. of heavy metal solution of 0.03M-Cu^(2+), Zn² , Ni^(2+) for 15 minutes at 15℃, the removal rate of adsorption were 98.0% in Cu^(2+), 94.9% in Ni², 66.5% in Zn^(2+). Therefore waste concrete is able to help to the neutralization of acid water and removal of heavy metals.

연구발표논문초록 ( 에너지 · 환경 (4) ) : 염료 합성 폐수에 대한 다공성 ceramic 의 특성에 관한 연구

권이열(Ee Yol Kwon),윤동준(Dong Jun Yoon),지형하(Hyung Ha Ji) 한국화학공학회 1988 추계학술발표회 Vol.- No.-

수중액중의 중금속에 대한 녹차의 흡착성질

권이열,김미경,이동섭,홍순영,전혜옥 漢陽大學校 環境科學硏究所 1992 環境科學論文集 Vol.13 No.-

본 연구는 수용액중의 중금속에 대하여 녹차를 이용하여 흡착능을 고찰하였다. 실험에 사용된 녹차는 시판되는 "태평양화학 설록차(2번차)"를 40∼60mesh로 만들어 사용하였다. 각 중금속이온을 함유한 시료용액에 녹차를 첨가하여 흔든 다음, 원심분리해서 상등액중의 각 이온농도를 원자흡광광도계로 측정했다. 그 결과, 각 조건에서 녹차에 의한 중금속의 최대흡착율은 Cu(Ⅱ)는 65∼78%, Cd(Ⅱ)는 78∼82%, Pb(Ⅱ)는 82∼92%였으며, 반응초기 10분간에 최대흡착율의 90%가 일어났다. The adsorptivities of the green-tea particles on Pb(Ⅱ), Cd(Ⅱ) and Cu(Ⅱ) ions were examined by measurements of the adsorption percentage under various conditions, and the method to collect and remove the metallic ion in aqueous solutions were described. Each of 100ml sample solution of Pb(Ⅱ),Cd(Ⅱ) and Cu(Ⅱ) ions mixed with 2g of the green-tea under stirring for minutes. The solutions were then centrifuged, and the concentrations of Pb(Ⅱ), Cd(Ⅱ), and Cu(Ⅱ) ions in the supernatant solution were determined by the atomic absorption spectrometer. As the results, the adsorption equilibrium of Pb(Ⅱ), Cd(Ⅱ) and Cu(Ⅱ) ions were reached to equilibrium by shaking for about 30∼40minutes. Then adsorptivities were 84%, 79% and 65% respectively.

일반적 분류에 의한 석유 아스팔트의 성분 분석

권이열,이복영 漢陽大學校 環境科學硏究所 1990 環境科學論文集 Vol.11 No.-

Asphalt의 화학적 성분을 분석해보면 물리적 특성을 평가할 수 있다. 본 연구에서는 국내 정유회사에서 생산되는 AP-3와 AP-5를 시료로 택해서 효과적인 solvent deasphaltening의 조건을 찾고, asphaltenes를 분리한 후 petroleumes을 elution-adsorption chromatography를 이용해서 saturates, naphthene-aromatics 및 polar-aromatics로 분리하여 두 asphalt의 특성을 비교해 보았다. 효과적인 solvent deasphaltening의 조건을 용매로 n-heptane을 사용하고 80℃에서 1시간 extraction을 할 때 였다. AP-3와 AP-5의 조성상의 특징은, AP-3에 비해 AP-5의 asphaltenes 비율이 3.24% 높은 데 비해 polar-aromatics는 AP-3가 2.46% 높았으며, naphthene-aromatics와 saturates에서는 각각 1% 이내의 차이를 나타내었다. 이 결과에서 asphaltenes의 비율이 AP-3와 AP-5의 물성에 가장 큰 영향을 주는 것을 알았다. The analysis of the chemical compositions of asphalts can help to evaluate the physical properties of them. In this experiment solvent deasphaltenings were carried to find out the most effective conditions for asphalt samples, AP-3 and Ap-5, produced in some domestic oil refineries. Asphaltenes were separated as precipitates on these conditions, and then petrolenes were separated into saturates, naphthene-aromatics, and polar-aromatics using elution-adsorption chromatography. AP-3 and AP-5 were most efficiently deasphaltened when extracted by n-heptane at 80℃ for one hour duration. Comparing the compositions of AP-3 and AP-5, AP-5 contains 3.24% more amount of asphaltenes than AP-3, meanwhile Ap-3 contains 2.46% more amount of polar-aromatics than AP-5. In the contents of naphthene-aromatics and saturates AP-3 and AP-5 are almost the same within 1% range. This analytical results suggest that the physical properties of asphalt is mainly influenced by the content of asphaltenes.

수중에서 감잎의 Cu(Ⅱ), Pb(Ⅱ) 이온에 대한 흡착능

권이열,전미희,김미경 漢陽大學校 環境科學硏究所 1993 環境科學論文集 Vol.14 No.-

본 연구는 감잎을 이용하여 수용액중의 중금속이온 Pb(II), Cu(II)의 흡착능을 고찰하였다. 시료인 감잎은 승우바이오(주)의 감잎차를 50-60mesh로 만들어 사용하였다. 각 중금속이온을 함유한 시료용액에 감잎을 첨가하여 항온조에서 교반시킨 다음, 상등액중의 각 중금속이온 농도를 원자흡광광도계로 측정하였다. 그 결과, 각 조건에서 감잎에 의한 중금속의 최대흡착율은 Cu(II)는 46.3%, Pb(II)는 89.8%였으며, 흡착평형도달시간은 15분에서 각각 36.1%, 79.8%의 흡착율을 보였다. In an attempt to prove adsorption ability of heavy metallic ion(Pb(II), Cu(II) in aqueous solution, this study is made by experimental batch test making use of persimmon leaves. The solutions were then centrifuged and the concentrations of Pb(II), Cu(II) ions in the supernatant solution were dertermined by the atomic adsorption spectrophotometer. As the results, the rate of heavy metallic abolition of persimmon leaves according to the adsorption time show 36.1% in Cu(II) and 79.6% in Pb(II) resulting in Pb(II)'s better than Cu(II) about two times. Concerning the heavy metallic concentration, the maximum removal efficiency of Cu(II) and Pb(II) show 46.3% and 89.8% respectively in 40ppm.

沿岸堆積物에서 多核芳香族 炭化水素 BENZO(a)PYRENE의 分析

권이열,김선도 漢陽大學校 環境科學硏究所 1993 環境科學論文集 Vol.14 No.-

Polycyclic aromatic hydrocarbons(PAHs)은 주위환경도처에 발견되는 발암물질로서 환경과학분야에 큰 관심의 대상이 되고 있으며, 그 중 benzo(a)pyrene bap은 암유발성이 가장 크다고 알려져 있다. 본 실험은 서해연안퇴적물을 Station A, Station B로 택하여 solvent extraction과 adsorption chromatograthy를 시행하여 PAHs를 추출하였다. 분리된 PAHs는 thin layer chromatograghy(TLC)와 Ultra Violet(UV) spectrophotometry로 bap의 농도를 결정하였다. Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous environmental contaminants and take a growing interest in the field of environmental science. In order to measure the benzo(a)pyrene of them, known as carcinogens, an area of Western Sea(Inchen) was divided into Station A and Station B. Then, shore sediment was collected from these two station. The procedures applied to these stations include, liquid-liquid system, liquid-solid chromatography using silica and alumina, TLS and UV spectrophotometry for the analysis of benzo(a)pyrene.

副生廢石膏 活用에 대한 基礎的 硏究

권이열 漢陽大學校 環境科學硏究所 1984 環境科學論文集 Vol.5 No.-

본 연구는 국내 비료공장에서 배출되는 인산부생생석고를 대상으로 하여 이를 활용하기 위한 기초적 연구이며 산업폐기물 활용에 관한 연구의 일환이다. 현재 국내에서 도자기용 형재로 사용하고 있는 수입석고를 위의 부생폐석고로 대체가능한가를 조사하고저 이에 대한 기초적 물성과 화학조성을 비교하며 불순성분들이 석고의 품질에 미치는 영향을 고찰하고 또한 수입품과 국내 부생폐석고의 형재로서의 성능을 검토하여 다음과 같은 결론을 얻었다. 1. β형 반수석고에 주요불순성분인 CaHPO₄·2H₂O, Al₂O₃, SiO₂가 단미로 혼입될 경우 (a) 응결시간에 미치는 영향: 일반적으로 완만히 짧아지고 CaHPO₄·2H₂O의 영향이 가장 현저하였다. (b) 습인장강도에 미치는 영향: 일반적으로 습인장강도는 약화되며 Al₂O₃, SiO₂의 영향이 큰 반면 CaHPO₄.2H₂O의영향이 적었다. 2. 불순성분 2성분이 복합되어 혼입될 경우 (a) 응결시간에 미치는 영향: Al₂O₃-CaHPO.2H₂O계에서는 양성분쪽으로 치우칠 때 응결시간은 길어지며, Al₂O₃-SiO₂계와 CaHPO₄·2H₂O-Al₂O₃계에서는 Sio₂의 함율이 높을수록 길어지는 경향이 있었다. (b) 습인장도에 미치는 영향: Al₂O₃-CaHPO₄.2H₂O계와 SiO₂-CaHPO4.2H₂O계에서는 CaHPO₄·2H₂O함율이 높을수록 Al₂O₃-SiO₂계에서는 SiO₂의 함율이 높을수록 습인장도는 약화되는 경향이 있었다. 3. 불순성분이 3중혼입될 경우 (a) 응결시간에 미치는 영향: SiO₂의 함율 및 Al₂O₃의 함율이 높을수록 CaHPO₄·2H₂O함율이같은 경우 SiO₂함율이 CaHPO₄. 2H₂O의 함율보다 높을수록 응결시간은 길어지는 경향이 있었다. (b) 습인장강도에 미치는 영향: CaHPO₄·2H₂O의 함율이 높을수록 CaHPO₄·2H₂O의 함율이 같을 때는 Al₂O₃의 함율이 SiO₂함율보다 높을수록 인장강도는 떨어지는 경향이 있었다. 4. 부성폐석고를 하소하여 만든 β형 석고를 70% 이내로 혼합할 경우 도자기 형제용 석고의 한국공업규격에 적합한 함율임을 알 수 있었다. A study for utilization of waste gypsum occurring as by-products from the domestic fertilizer industry was carried out. In order to ascertain the possibility of substitution of imported gypsum by waste gypsum in the practical use, some physical and chemical properties of waste gypsum were investigated. The following results were obtained from this study: 1. When β-gypsum hemihydrate was adulterated by major impurities such as CaHPO₄·2H₂O, Al₂O₃ and SiO₂: (a) Setting time of the gypsum was gradually reduced. (b) Wet-tensile strength of the gypsum was decreased by these impurities. Al2o3 and SiO2 were more effect than CaHPO₄·2H₂O on the strength 2. When binary-component were adulterated by β-gypsum: (a) Setting time of the gypsum was increased by Al₂0₃-CaHPO₄·2H₂O especially when the amount of either component of this binary system is predominate over the other. For both Al₂0₃-SiO₂ and CaHPO₄-Al₂O₃ systems the coagulation time was increased with the content of SiO₂ (b) Wet-tensile strength of the gypsum was decreased with the content of SiO₂ in Al₂0₃-SiO₂ system and with the content of SiO₂ in both Al₂0₃-CaHPO₄·2H₂O and SiO₂-CaHPO₄·2H₂O systems. 3. When triple-components were adulterated in β-gypsum: (a) Setting time of the gypsum was increased with decrease of the content of SiO₂ meanwhile decreased with the content of Al₂0₃. When the content ratio of CaHPO₄·2H₂O was the same, the setting time was increased in case of the content of SiO₂ was larger than that of CaHPO₄·2H₂O. (b) Wet-tensile strength of the gypsum was decreased proportionally with the amount of CaHPO₄·2H₂O. When the content ratio of CaHPO₄·2H₂O was the same, the tensile strength was decreased in case of the amount of Al₂0₃ was predominant over that of SiO₂. 4. When 70% of β-gypsum obtained by calcination If waste gypsum was adulterated in β-gypsum hemihydrate, a good pottery moldin material which fits to the korean industrial standard was obtained.

Zeolite合成時 高嶺土의 加熱이 生成物에 미치는 影響

權彛烈 漢陽大學校 基礎科學硏究所 1981 基礎科學論文集 Vol.1 No.-

A study has been carried out for the determination of the optimum condition the synthesis of a zeolite from a pinkish Korear kaoline. The optimum condition was obtained when the kaoline had been heated at 800℃ for 3 hours and them treated with 2N sodium hydroxide solution for 8 hours.

高嶺土로 부터 鹽基性鹽化알루미늄의 製造에 관한 硏究

권이열 漢陽大學校 1979 論文集 Vol.13 No.-

Some optimal conditions are sought to produce from Korean Kaoline the basic aluminum chloride which is widely used as a coagulater in water treatment. Kaoline is calcinated at 800℃ for tree hours and alumina is extracted with hydrochloric acid, sulfuric acid aud their mixed acid in sequence. The H₂SO₄extract of kaoline is neutralized with CaCO₃to increase the pHvalue, and this solution is reacted with the HCl extract to produce the basic aluminuim chloride. Six moles of 18% HCl are used to yield 95% of products per alumina mole. The basic alumium chloride from the above-mentioned extracts show more than 50% of basicity and its yield is around 60%.