• Title, Summary, Keyword: organic pollutants

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Simultaneous Removal of Organic Pollutants, N, P, and Antibiotics from Liquid Fertilizer using a Microbubble and Catalyst Coupling System (마이크로버블/촉매 융합 시스템을 이용한 액비 내 유기오염물질, N, P 및 항생제 동시 제거)

  • Lee, Dong Gwan;Sim, Young Ho;Paek, Yee;Kwon, Jin Kyung;Jang, Jae Kyung
    • Journal of Environmental Science International
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    • v.28 no.11
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    • pp.983-991
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    • 2019
  • This study investigated the use of a hydroxyl-radicals-generated microbubble/catalyst (MB/Cat) system for removing organic pollutants, nitrogen, and phosphorous from liquid fertilizer produced by livestock wastewater treatment. Use of the MB/Cat system aims to improve the quality of liquid fertilizer by removing pollutants originally found in the wastewater. In addition, a reduction effect has been reported for antibiotics classified as representative non-biodegradable matter. Samples of liquid fertilizer produced by an aerobic biological reactor for swine wastewater treatment were first analyzed for initial concentrations of pollutants and antibiotics. When the MB/Cat system was applied to the liquid fertilizer, TCOD, TOC, $BOD_5$, and $NH_3-N$, and $PO_4-P$ removal efficiencies were found to be approximately 52%, 51%, 30%, 21%, and 66%, respectively. Additionally, Amoxicillin hydrate was removed by 10%, and Chlortetracycline HCl and Florfenicol were not present at detectable levels These findings confirm that the MB/Cat system can be used with livestock wastewater treatment to improve liquid fertilizer quality and to process wastewater that is safe for agricultural re-use.

The distribution characteristics of persistent organic pollutants in incineration residues at solid waste incinerators (소각시설 소각재의 잔류성 유기오염 물질 분포특성)

  • Kim, Jong-Hyang;Lee, Bang-Hee;Baek, Sung-Bok;Lee, In-A;Lee, Sang-Hee;Park, Kyung-Ho;Kim, Hyun
    • Analytical Science and Technology
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    • v.22 no.2
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    • pp.119-127
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    • 2009
  • This study was carried out to investigate the distribution characteristics of persistent organic pollutants in incineration residues at industrial waste incinerators and municipal solid waste incinerators, which were analyzed by the official analytical method for the endocrine disrupting chemicals and the waste. Seven of 12 persistent organic pollutants were quantitatively analyzed by GC-MSD (SIM-mode). Hexachlorobenzene was detected in 21 samples among 44 incineration residues. The level of hexachlorobenzene was 0.132-8.138 ng/g in incineration residues, 0.195-5.765 ng/g in fly ash at industrial waste incinerators, 0.270-1.828 ng/g in bottom ash and 0.154-50.643 ng/g in fly ash at municipal solid waste incinerators, respectively.

Effect of Reactivation of Activated Carbon on Adsorption of Natural Organic Matter (활성탄 재생이 자연유기물질의 흡착에 미치는 영향)

  • Hong, Seongho;Choi, Jusol
    • Journal of Korean Society of Water and Wastewater
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    • v.21 no.3
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    • pp.323-329
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    • 2007
  • There is no certain definition about advanced drinking water treatment but it is generally known as activated carbon process, membrane process or ozone process which can remove non-conventional pollutants such as taste and odor compounds, and micro-pollutants. There are more than 20 processes related to activated carbon as adsorber or biological activated carbon in Korea. The saturated carbon by pollutants can be reused by reactivation. However, the effect of reactivation on activated carbon is not well-understood in terms of changing physical properties of carbon to adsorption capacity of natural organic matter (NOM). In this study, the effects of reactivation on physical properties of activated carbon were investigated by isotherm and breakthrough of NOM. Ash content was increased from 8% to 13.3%. Iodine number is commonly used as an indicator for performance of reactivation. The iodine number was decreased about 20% after reactivating twice. The degree of reactivation can be evaluated by not only iodine number but also apparent density.

Characterization and Assessment of Indoor Air Quality in Newly Constructed Apartments -Volatile Organic Compounds and Formaldehyde- (신축공동주택의 실내공기질 특성 및 평가 -휘발성 유기화합물 및 포름알데히드 중심으로-)

  • Sim, Sang-Hyo;Kim, Yoon-Shin
    • Journal of Environmental Health Sciences
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    • v.32 no.4
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    • pp.275-281
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    • 2006
  • Indoor air quality is the dominant contributor to total personal exposure because most people spend a majority of their time indoors. Especially exposure to indoor air can potentially pose a greater threat than exposure to ambient air when indoor environments have sources of contaminants. In this study, volatile organic compounds (VOCs) and formaldehyde (HCHO) within newly constructed apartment have been determined in 27 houses of apartment in Seoul from December 2004 to March 2005. The measured indoor air pollutants were HCHO, volatile organic compounds including benzene, toluene, styrene, xylene, ethylbenzene and sampled on the standard method of Ministry of Environment in Korea. The indoor levels for benzene, xylene, toluene, ethylbenzene, styrene, and HCHO have significant increase trend after 5 hours closing of windows and doors. Levels of measured air pollutants concentrations between living rooms and bedrooms have not shown significant difference. Spearman correlation coefficient among the measured air pollutants ranged from 0.303 to 0.946, indicating similar source in building materials.

Enhancement of biodegradability of the Refractory Organic Substances in Aqueous Solution with Discharged Water Generating (DWG) System (방전시스템(Discharged Water Generator)을 이용한 난분해성 물질의 생분해능 향상에 관한 연구)

  • Yeo, Inho;Ryu, Seung Min;Park, Heekyung
    • Journal of Korean Society of Water and Wastewater
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    • v.20 no.1
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    • pp.79-85
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    • 2006
  • Innovated technique to oxidize pollutants has been developed. The technique for this study uses plasma discharge in 2-phase (Air-Water) and is called Discharged Water Generating (DWG) system. It produces electric arc which generates not only the physical decomposing power against the pollutants but also oxidants to sterilize pollutants depending on the inlet gas species. These physical and chemical products play an important role in COD decrease and biodegradability enhancement. The enhancement of biodegradability for the refractory organic substances in aqueous solution was estimated in this study. Argon discharge reduced NBDCOD of EDTA from 58.7mg/L to 38.8mg/L, but oxygen discharge and ozonation reduced it to 37.74mg/L and 38.73mg/L respectively. Furthermore, Argon discharge changed 1181mg/L of NBDCOD of dye effluent into 606mg/L but oxygen discharge and ozonation changed it into 888mg/L and 790mg/L respectively.

Actual Conditions and Alternative Materials for the Pesticides containing Persistent Organic Pollutants in South Korea

  • Lim, Young-Wook;Kim, Ho-Hyun;Lee, Jun-Sang;Roh, Young-Man;Lee, Gee-Young;Jung, Hae-Woong;Lee, Jae-Young
    • Korean Journal of Environmental Agriculture
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    • v.27 no.3
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    • pp.285-291
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    • 2008
  • A global binding agreement was adopted with the leading of United Nations Environment Program (UNEP) on May 22, 2001 in Stockholm to regulate the production and distribution on persistent organic pollutants (POPs). The agreement took effectuation with the ratification of 59 countries from the approval of 151 countries on May 17, 2004. After the approval on October 4, 2001, South Korea performed systematical investigation on POP-related substances such as chlordane, dichloro diphenyl trichloroethane (DDT), hexachlorobenzenes (HCB), heptachlor, polychlorinated biphenyls (PCBs) to get ready for the ratification of the convention with country-specific exemption. The domestic distributions of those chemical substances have been officially prohibited since the late 1960s to the early 1980s. Although there were occasional reports for the detection of some of those chemical substances, those performed minute signification in their existence in the environment. A series of investigation with documentary examination and fact-finding survey showed the possibility for the ratification on the convention without country-specific exemption.

Potential Health Risks from Persistent Organic Pollutants (POPs) in Marine Ecosystem

  • Lee, Youn Ju;Jang, Jae-Seok;Yang, Jae-Ho
    • Journal of Marine Bioscience and Biotechnology
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    • v.8 no.1
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    • pp.10-17
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    • 2016
  • A wide-spread contamination of persistent organic pollutants (POPs) such as dioxins, PCBs, PBDEs in the aquatic ecosystem has generated a great concern over the potential risk for these substances to impact marine biotas and food web. Since a major exposure route of these substances to the humans is through the consumption of food including fish and marine byproducts, the consumption of contaminated products has been a great public health concern. Exposure to POPs has been associated with a wide spectrum of adverse effects including reproductive, developmental, immunologic, carcinogenic, and neurotoxic effects. This review covers the background information of key POPs substances and the recent development of toxicity studies including the mode of action. Because neurotoxic effects of some POPs have been observed in humans at low concentrations, polychlorinated biphenyl (PCB), a representative chemical of POPs, is focused to discuss the possible mode(s) of action for the neurotoxic effects. This review provides the updates of toxicity studies on POPs and paves ways to discuss a possible implication of contaminated marine biota over the human health among the marine biotechnology researchers.

Potential Exposure of Indoor Air Pollutants inside Vehicle for Professional Taxi Drivers (영업용 택시 운전자들의 공기오염물질 노출평가)

  • Yang Won-Ho;Kim Dae-Won;Kim Young-Hee;Kim Jong-Oh
    • Journal of environmental and Sanitary engineering
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    • v.20 no.4
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    • pp.69-75
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    • 2005
  • Professional taxi driver exposure to indoor air pollutants has been a subject of concern in recent years because of higher levels of air pollutants, comparing to the surrounding atmosphere. This study evaluated the potential exposure to respirable suspended particulate (RSP), nitrogen dioxide $(NO_2)$ and volatile organic compounds (VOCs; benzene and toluene) for professional taxi drivers inside each of 10 vehicles in Pusan, comparing weekday (Monday and Thursday) and weekend (Saturday). Indoor mean concentrations of RSP inside vehicle were $53.88\;ug/m^3\;and\;75.52\;ug/m^3$ on weekday and weekend, respectively. Measured indoor $NO_2$ concentrations were 28.32ppb and 40.69 ppb, respectively. Benzene and toluene mean concentrations inside vehicle were 5.41 ppb and 11.36 ppb, respectively. Considering no smoking of taxi drivers inside vehicle, closed window in winter, and increased usage of taxi on weekend, source of indoor air pollutants inside taxi might be mainly suggested from the number of passenger's carried, faulty exhaust systems, and engine and carburetor evaporative emissions.

Optimal Operation Condition of Spray Drying Sorber for Simultaneous Removal of Acidic and Organic Gaseous Pollutants (산성 및 유기성 가스의 동시제거를 위한 준건식 세정시스템의 적정 운전 조건)

  • 백경렬;구자공
    • Journal of Environmental Science International
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    • v.10 no.1
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    • pp.59-64
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    • 2001
  • The effect of major operating parameters in spray drying sorber(=SDS) for automatic control for the simultaneous removal of acidic and organic gaseous pollutants from solid waste incinerator was performed. The field experiment was carried out in pilot scale test for the quantification of major operating parameters of hydrophilic and the hydrophobic pollutants. The removal efficiencies of $SO_2$and HCI in the 5wt% slurry condition were being increased with the increase of the stoichiometric ration which is the molecular ratio of lime to the pollutant concentration, and with the decrease of inflow flue gas temperature in the pilot SDS reactor. The removal efficiency along the height of spray drying sorber was closely related to the temperature profile, and more than 90% of total removal efficiency was achieved in an absorption region. For the removal of acidic gas the optimum operating condition considering the economics and a stable operation is the 5wt% of slurry concentration, 1.2 of stoichiometric ratio and 25$0^{\circ}C$ of inflow flue gas temperature. For the organic gases of benzene and toluene the removal efficiencies were 20-60% which is much lower than that of acidic gas. The best removal efficiency was obtained at 1.5 of stoichiometric ratio and 25$0^{\circ}C$ of inflow flue gas temperature. The organic\`s removal efficiency along the height of spray drying sorber was quite different from that of acidic gas, that is, more than 60% of the total removal efficiency for benzene and 90% of the total removal for toluene were achieved in the dried adsorption region, which was formed at the lower or exit part of the reactor.

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Air Quality Management in the Industrial Estate, HAP or VOC\ulcorner (산업단지 대기질 관리, HAP인가 VOC인가\ulcorner)

  • 김영성
    • Journal of Korean Society for Atmospheric Environment
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    • v.15 no.4
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    • pp.513-517
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    • 1999
  • Problems of secondary pollution and hazardous pollutants have rapidly come to the front in our society during the past few years. More attention should be paid to monitoring and assessment in order to identify the nature of complicated problems, but our air-quality policy is hurriedly seeking for management strategies. A typical example is air quality management in the industrial estates such as those located in Yochon and Ulsan. Yochon Industrial Estate was designated as a special air-quality management area of volatile organic compounds(VOCs) in 1996. And VOCs in the air of Ulsan Industrial Estate has been specially controlled since 1997. In this paper, however, it is suggested that hazardous air pollutants(HAPs) rather than VOCs should have been managed in the industrial estates. History of studies on organic compounds in the air of the industrial estates is reviewed. A stepwise approach for air quality management in the industrial estates is recommended.

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