• Title, Summary, Keyword: organic pollutants

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Characteristics of TCE, Benzene & 2,4 Dichlorophenol Degradation in Aqueous solution by Ulrasonic Irraditation (초음파 조사에 의한 수중의 TCE, Benzene & 2,4 Dichlorophenol의 분해 특성)

  • 손종렬;모세영
    • Journal of environmental and Sanitary engineering
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    • v.11 no.2
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    • pp.33-41
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    • 1996
  • This study was performed to examine the factors influencing on the degradation of TCE, Benzene and 2,4 DCP in aqueous solution using ultrasonic irradiation. The TCE,Benzene and 2,4 DCP, which are hazard compounds causing environmental pollution, were not decomposable pollutants by convientional treatment. The results shows that the generation of H$_{2}$O$_{2}$, H$^{+}$ and OH$^{-}$ radical was formed by the oxidation and reduction reaction of ultrasound, and then theses decomposed the refractory pollutants of TCE, Benzene & 2,4 DCP in aqueous solution. we conformed that the ultrasonic irradiation was excellent in removal efficiency of the refractory pollutants any other than Advanced Oxidation Processes(AOP), utilized the treatment of organic compounds in the industrial wastewater. Consequently, these results suggest that ultrasonic irradiation may be extremely useful for the treatment of wastewaters contaminated organic pollutants, which is difficult to treat economically by conventional process.

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Remediation of Soil Contaminated with Persistent Organic Pollutants through Subcritical Water Degradation (아임계수 분해를 이용한 난분해성 물질로 오염된 토양의 정화 연구)

  • Choi, Jae-Heon;Lee, Hwan;Lee, Cheol-Hyo;Kim, Ju-Yup;Oh, Seok-Young
    • Journal of Korean Society of Environmental Engineers
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    • v.37 no.2
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    • pp.113-119
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    • 2015
  • This study examined remediation of soil contaminated with polychlorinated biphenyls (PCBs) and other persistent organic pollutants by using subcritical water. Our results showed that removal efficiency of PCBs from soil and treatment temperature were linearly proportional under subcritical conditions. The removal efficiency as increased as reacting period increased. PCBs contaminating fine particles in soil were less effectively removed than those in entire contaminated soil. Reaction of the zero-valent iron and PCBs under subcritical condition produced dechlorinated product, where most of the PCBs were oxidised while little remained as dechlorinated. Other organic pollutants, such as TPH, BTEX, TCE/PCE, and chlorpyrifos, were removed by more than 90% at $300^{\circ}C$. Considering removal efficiency and identification of by-products, we suggest that subcritical water treatment may be effectively applied to soils contaminated with various persistent organic pollutants.

Organic Wastewater Treatment by using Bamboo Charcoal (대나무 고온탄을 이용한 유기성 폐수처리)

  • Kim, Sun-Hwa;Kim, Hae-Jin;Kim, Joon-Tae
    • Journal of environmental and Sanitary engineering
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    • v.22 no.1
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    • pp.17-27
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    • 2007
  • This study was conducted the adsorption experiment way of organic wastewater (BOD, COD, TOC, T-N, T-P) by changing the carbonization temperature and the size of adsorbent to examine the adsorption capacity of Korean traditional charcoal which has similar characteristics to activated carbon of organic pollutants. Also, it was performed the basic experiment for pH and inorganic materials. As a result of observing Korean traditional charcoal with has the greatest inorganic contents which are the important factor of chemical adsorption. As the carbonization temperature was better high temperature charcoal than law temperature charcoal to adsorption capacity of pollutant and as the particle was minute (D size : $3.35mm{\sim}2.0mm$), it was most effective. The result of adsorption experiment of organic wastewater show that the elimination ratio of pollutants by bamboo high temperature charcoal was found as BOD(82.1%), COD(91.7%), TOC(52.4%), T-N(66.6%), T-P(83.2%) and it has most excellent adsorption capacity of organic pollutants.

Factors to be Considered in Management and Control of Persistent Organic Pollutants (잔류성 유기오염물질의 관리와 제어에서 고려하여야 할 인자들)

  • Ghim, Young-Sung
    • Journal of Korean Society for Atmospheric Environment
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    • v.22 no.3
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    • pp.393-398
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    • 2006
  • As ratification of the Stockholm Convention to eliminate or reduce the release of persistent organic pollutants (POPs) into the environment draws near, the Government and industries are actively developing appropriate management and control measures. However, considerable work is needed in order to clarify vast uncertainties imposed in management and control of POPs while handling POPs is extremely difficult because of their toxicity and low levels in the environment. In this note, some major factors to be considered for effective management and control of POPs are reviewed on the basis of recent findings.

Separation of Organic Pollutants by Nondispersive Membrane-Solvent Extraction (비분산 막-용매추출에 의한 유기오염물의 분리)

  • 유홍진;한성록
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.5 no.2
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    • pp.174-185
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    • 2004
  • Organic pollutants (Phenol, 2-Chlorophenol, Nitrobenzene) were separated from wastewater by nondispersive membrane solvent extraction, using a microporous hydrophobic hollow fiber module. The system was operated countercurrently and cocurrently with the aqueous phase flowing through the fiber lumens and the solvent flowing through the shell side. The distribution coefficients of several solvents (MIBK, IPAc, Hexane) were examined and MIBK was selected as an extracting solvent. Separation efficiency of countercurrent flow method was better than that of cocurrent flow method. Also, the overall mass transfer coefficients were determined.

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Removal Technologies of Odor and Volatile Organic Compounds from Industrial Processes (산업체 VOC/악취 저감기술)

  • Choo, Soo-Tae;Nam, Chang Mo
    • Journal of the Korean Society of Industry Convergence
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    • v.7 no.3
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    • pp.289-297
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    • 2004
  • Emissions of volatile organic compounds and odors from various industrial processes not only pollute surrounding life environments, but also lead to the deterioration of the working environments, causing various industrial health and business problems. These pollutants are usually stimulating, irritating, malodorous and sometimes carcinogenic, Which should be reduced in the pollutants formation, stage, but the practical processes do not allow This paper describes the major sources of VOC and odors, and their sampling/analysis methods. Furthermore, various removal technologies for these pollutants are suggested, which particularly include the characteristics of the catalytic and scrubber/carbon filter combined process, and even process design technologies.

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Property of Organic Pollutants in Southwest Coastal Sea (서남해 연안에서의 유기오염물질 특성 규명)

  • Lee Mun-Hee;Park Ji-Yeong;Han Sang-Kuk
    • Proceedings of KOSOMES biannual meeting
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    • pp.85-88
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    • 2004
  • In this study, properties of organic pollutans were examinated using simultaneous determination from Kwang-Yang Bay, Ka-Mac Bay, Ywan-Do, Hae-Nam, Young-Kwang, Mokpo in Southwest coastal sea. As result, score species of organic pollutants detected coastal sea during summer-winter season Many species of Phenols and Phthalates detected regardless of season in several point Especially, Pesticiides reprosented during summer between Kwang-Yang Bay, Ywan-Do, Hae-Nam. But in winter-season, many species of Aromatic compounds analyzed out in Kwang-Yang Bay. This results consider by pollution of organic pollutans from ship, flow hrbor, estuary, bay.

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Simultaneous Analysis of Semi-Volatile Organic Base/Neutral Priority Pollutants in Soil (토양 중의 비휘발성 염기/중성 유기 Priority Pollutants 동시 분석에 관한 연구)

  • Lee, Seung Seok;Park, Gyo Beom;Lee, Seok Geun
    • Journal of the Korean Chemical Society
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    • v.38 no.6
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    • pp.418-426
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    • 1994
  • This study was aimed at the detection of 40 semi-volatile organic base/neutral compounds from soil among 129 priority pollutants listed by EPA. Two extraction procedures, sonication extraction and Soxhlet extraction, were studied as a extraction and concentration method for priority pollutants in soil. Extracts were analyted by GC/MS-SIM(selected ion monitoring). The analytical methods were tested by standard compounds spiked into blank soil. Accuracy and precision of the methods were measured by calculation of mean recovery and mean relative standard deviation. And the method detection limits were estimated.

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Cycling of Matters in the Constructed Wetland (인공습지에서의 물질순환에 관한 연구)

  • Kim, Dong-Oug;Park, Je-Chul
    • Journal of Environmental Science International
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    • v.29 no.3
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    • pp.299-306
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    • 2020
  • This study analyzed the changes in the concentrations of the pollutants of constructed treatment wetlands which come from the discharge water of a sewage treatment plant. According to the results of budgets in constructed wetlands, the net production of the organic carbon, nitrogen and phosphorus were 368 kgC/month, 306 kgN/month and -49 kgP/month, respectively. The high particle form of pollutants are mostly removed due to settlement and absorption when passing through wetlands, but because a low processing efficiency for pollutants was shown when sewage treatment plant wastewater flows in, there is a need for a water management system that can reduce the organic matter load through monitoring. The low removal efficiency of constructed wetlands were caused by both structural and operational problems. Therefore, to enable to play a role as a reduction facility of pollutants, an appropriate design and operation manuals for constructed wetlands is urgently needed.

The vertical environmental characteristics in the tidal flat sediments (갯벌의 수직적 환경 특성)

  • 김종구;유선재
    • Journal of Environmental Science International
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    • v.9 no.2
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    • pp.125-129
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    • 2000
  • As one of the fundamental survey to evaluate purification capacity of pollutants at the tidal flat sediments, we studied vertical environmental characteristics in three tidal flat sediments, Chunjangdae, Eueunri and Gyewhado. These are dissmilar to external feature in each other. The results of this study may be summarized as followed; As the results of particle analysis, Eueunri tidal flat fediment located in Keum river estuary consists of 98.98% as silt & clay, Chunjangdae tidal flat sediment located in SeocheonGun consists of 97.99% as sand. And Gyewhado tidal flat sediment located in Saemankeum in Saemankeum area consists area consists of 32.81% as silt & clay and 67.19% as sand. The concentration of organic pollutants(I.L., COD, POC, PON) in Eueunri tidal flat sediment which highly content of silt & clay were 3~4 times higher than others. The concentration of organic pollutants at each layer were slightly increase goes with deepen layer. The linear correlation between I.L. and COD, POC, PON were obtained. Correlation coefficients were in range of 0.821~0.940. Also the correlation between pH and COD, POC, PON were high(>r=0.9). Filteration rate in Chunjangdae tidal flat sediment was 0.01584cm/s as mean value, but the other were almost nothing filtered off.

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