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곽명화,우성훈,김익성,박승조 한국자원리싸이클링학회 2000 資源 리싸이클링 Vol.9 No.1
산화제 제조시 초기 과정에서 $Fe_3O_4$ 가 피복되었고 2 단계에서는 $Fe_3O_4$ 보다 첨착능이 우수한 것으로 알려져 있는 $Fe_3O_4$가 생성되었다. 산화제 폐염삼 30g/l에 5Cu mg/l를 첨가하여 20분간 반응하였을 경우 구리이온 제거효율은 74.8%이었다. 연속실험에서 최종 배출수중의 구리농도가 1mg/l이하를 파괴점으로 보았을 때 파괴점 도달시간은 23시간이었고 흡착용량은 0.87$\cdot$Cu/g$\cdot$IOCS이었다. The sand particle was coated with $Fe_3O_4$ and then $Fe_2O_3$ that adsorption capacity was more excellent than $Fe_3O_4$ was mostly found in 2nd step for preparation of iron-oxide-coated sand (IOCS). The copper removal rate was 74.9 percent by adding 30 gram per liter iron-oxide-coated sand from the solution with 5 mg/l Cu in 20 minute. Breakthrough time occurred in 23 hours and adsorption capacity 0.87$\cdot$Cu/g$\cdot$IOCS in case of breakthrough copper concentration was 1.0 mg/l in the continuous test.
유현철,김정섭,곽명화,윤철종,이희인,박승조 동아대학교 환경문제연구소 2001 硏究報告 Vol.24 No.1
Problems of wastes that pigs produce are increasing rapidly in the hog raising industry nowadays. consequently, the generation volume of excreta also is increasing but most of that is not disposed appropriately and exposed in eco-system therefore the disposal of stock excreta is becoming more and more serious. considering the physical and chemical characteristics of livestock excreta, the pollution loading rate - BOD, COD etc. - is very high. as alternative plan, that is, as one method kind of composisting, the utilization of the soil reformation agent will become one solution in managing the upper problems. also, the flyash of 3.7 million tons are producing every year and about 32.2% of that, 1.18 million ton is recycled as concrete, cement, cementassistance, road etc. consequently, the discharged flyash is not abandoned and a plan of recycling is needed acutely. gypsum of 4.16 million tons in 1998 presently was produced and about 57.2% of that, 2.38 million tons was recycled as cement, construction materials. the present stock is 25 million tons. therefore, in this study, because organic materials can be obtained in pig excreta and calciums can be obtained in gypsum, the small amount of elements can be acquired in flyash for the soil reformation agents, mixing the three materials - pig excreta, gypsum, flyash - adequately, investigated technique of making the soil reformation agents and described below in comparrision with the changes of temperature, PH TOC, T-N, TOC/T-N ratio etc.
최성우,이봉섭,곽명화,윤철종,박승조 동아대학교 환경문제연구소 2001 硏究報告 Vol.24 No.2
Chromium occurs naturally in the earth's crust as well as in air, surface, and ground water. However, chromium is released to the environment in much larger amounts as a result of human activities. Hexavalent chromium, Cr(Ⅵ), is very soluble in water in natural environment and very toxic, carcinogenic, and mutagenic in animal and man. On the other hand trivalent chromium, Cr(Ⅲ), is less toxic and less soluble and thus is a lesser problem. This study has been carried out in order to reduce toxicity of Cr(Ⅵ) by an Escherichia coli strain. After adding E. Coli., the results were obtained from concentration of total Cr, Cr(Ⅵ). Cr(Ⅲ), pH, turbidity, and VSS in aerobic condition was summarized as follows : After 48hr aerobic condition in experiment of synthetic wastewater, the reduction rate of Cr(Ⅵ) was 20%. Also, the reduction rate of Cr(Ⅵ) was 60% in experiment of raw wastewater.
유현철,김정섭,곽명화,이히인,박승조 한국자원리싸이클링학회 2002 資源 리싸이클링 Vol.11 No.1
이 연구는 돈분, 석고와 석탄화를 혼합물을 퇴비화한 것이다. 실험에 사용한 A 시료(PM : SD = 6 : 4)와 C 시료(PM : SD : GS : CFA = 6 : 2 : 1 : 1)를 사용하여 퇴비화 실험결과 A, C 시료의 초기 수분함량은 64, 50%이었고 온도, pH에서도 A시료와 비교했을 때 큰 차이는 없었으나 A,C 시료의 최종 TOC는 약 5550, 2900 mg/kg 이었다. 양이온 교환능은 A, C시료와는 크게 차이는 없었으나 CEC값으로 보아 숙성에 더 많은 시간이 필요할 것으로 생각된다. 그러나 석고와 석탄회 첨가는 돈분 퇴비화 과정에서 첨가제로서의 역할이 있음을 알 수 있었다. This study was conducted to compost the mixture of Pig manure, gypsum and fly ash. Initial moisture contents of sample A (Pig manure : saw dust = 6 : 4) and C (Pig manure : saw dust : gypsum : coal fly ash= 6 : 2 : 1 : 1) in the reactor were 64 and 50%. Also temperature and pH of samples in the reactor was nearly the same. Total Organic Carbon (TOC) concentration of sample A and C were about 5500, 2900 mg/kg respectively. This sample was needed a lot of time to mature as viewing cation exchange capacity (CEC) after experiment was over. However added with gypsum and coal fly ash in Process of Pig manure composting Process was suggested that gypsum and coal fly ash have a roles of additive agent.