• Title, Summary, Keyword: organic pollutants

Search Result 722, Processing Time 0.036 seconds

A Study on the Characteristic Trace Organic Pollutants in the Industrial Wastewater (산업폐수중 미량유기오염물질 배출 특성)

  • Chung, Y.H.;Kim, S.C.;Shin, S.K.;Kang, I.G.;Lee, J.I.;Lee, W.S.;Lee, J.B.
    • Analytical Science and Technology
    • /
    • v.11 no.1
    • /
    • pp.62-72
    • /
    • 1998
  • This study was performed to characterize the trace organic pollutants in the industrial wastewater and to establish the database of the trace organic pollutants. The four manufacturing industries, which are refined petroleum, industrial chemicals, rubber & plastics and fabricated metals, were surveyed. The wastewater and discharging water of these 30 factories are analyzed to characterize the trace organic pollutants. In industrial chemicals, the kinds of products and organic pollutants are very various. Therefore to select the characteristic organic pollutants in this categories are also very difficult. In industrial chemicals, the gas chromatograpic peak patterns of wastewater are represented the various type according to their products, therefore the typical patterns of the characteristic organic pollutants could not be obtained because the kinds of manufactured goods and organic pollutants are very various. In refined petroleum, the effluent is discharged in the distillatory process of atmosphere pressure and contained the saturated hydrocarbons, phenol compounds, benzene compounds and naphtalene compounds. The saturated hydrocarbons peaks from $C_{15}$ to $C_{35}$ are represented the typical oil patterns by the uniform intervals therefore the peak can be easily distinguished. In rubber & plastics, the wastewater is discharged in the washing process which contains the additives. The problem of wastewater is not serious because the manufacturing process is not produced the effluent or the produced cooling water is recycled in that process.

  • PDF

Determination of Organic Pollutants in Dyeing Wastewater (염색폐수 중의 유기오염물질 분석)

  • Yook, Keun-Sung
    • Analytical Science and Technology
    • /
    • v.10 no.5
    • /
    • pp.332-342
    • /
    • 1997
  • Fifteen volatile organic pollutants were spiked in blank water at the concentration of $20{\mu}g/L$ and analyzed with Purge and Trap and GC/MS. As a result, the overall mean recovery of 100% was obtained with a mean relative standard deviation of 3.6%. The method detection limits were in the range of $1.9{\sim}3.3{\mu}g/L$. In the wastewater analysis of Banwol dyeing comlex, 15 organic compounds were identified and three of these were quantified. Among the compounds identified, only trichloroethylene and tetrachloroethylene are regulated in wastewater by the Korea Ministry of Environment. But, the concentration of these two compounds were below the government allowance level.

  • PDF

Air Monitoring of Persistent Organic Pollutants Using Passive Air Samplers (Passive Air Sampler를 이용한 잔류성 유기오염물질의 대기 모니터링)

  • Choi, Sung-Deuk;Chang, Yoon-Seok
    • Journal of Korean Society for Atmospheric Environment
    • /
    • v.21 no.5
    • /
    • pp.481-494
    • /
    • 2005
  • The monitoring of persistent organic pollutants (POPs) in the atmosphere is a basis for the study of the fate of POPs in multimedia environments. Recently, passive air samplers (PASs) for POPs have been developed. In this paper, we deal with the principle, properties, and applications of the PAS. The principle of PAS, which has no pump, is physical sorption of semi-volatile organic chemicals on various sorbent materials. The PAS is much smaller than a high-volume air sampler and does not need electricity. These properties of the PAS make it possible to conduct various-scaled environmental monitoring all over the world including the Arctic and Antarctic, but the major disadvantage of PAS is its long sampling periods up to 2 years. To date, four kinds of PAS have been developed: polyurethane foam (PUF), polymer-coated glass (POG), semi-permeable membrane devices (SPMDs), and XAD resin-based PAS. Among them, SPMDs have been commercialized and are most widely used now. Meanwhile, the POPs emitted from China have a large potential to influence the levels and fates of POPs in Korea. Since characteristics of PAS are quite useful to monitor long-range transport of POPs, the use of PAS is highly recommended.

In situ measurement-based partitioning behavior of perfluoroalkyl acids in the atmosphere

  • Kim, Seung-Kyu;Li, Donghao;Kannan, Kurunthachalam
    • Environmental Engineering Research
    • /
    • v.25 no.3
    • /
    • pp.281-289
    • /
    • 2020
  • Environmental fate of ionizable organic pollutants such as perfluoroalkyl acids (PFAAs) are of increasing interest but has not been well understood because of uncertain values for parameters related with atmospheric interphase partitioning behavior. In the present study, not only the values for air-water partition coefficient (KAW) and dissociation constant (pKa) of PFAAs were induced by adjusting to in situ measurements of air-water distribution coefficient between vapor phase and rainwater but also gas-particle partition coefficients were also estimated using three-phase partitioning model of ionizable organic pollutants, in situ measurements of PFAAs in aerosol and air vapor phase, and obtained parameter values. The pKa values of PFAAs we obtained were close to the minimum values suggested in literature except for perfluorooctane sulfonic acids, and COSMOtherm-modeled KAW values were assessed to more appropriate among suggested values. When applying parameter values we obtained, it was predicted that air particle-associated fate and transport of PFAAs could be negligible and PFAAs could distribute ubiquitously along the transection from urban to rural region by pH-dependent phase transfer in air. Our study is expected to have some implications in prediction of the environmental redistribution of other ionizable organic compounds.

Simultaneous Analysis of Pesticide Priority Pollutants in Soil (토양 중의 Pesticide Priority Pollutants 동시 분석에 관한 연구)

  • Lee, Seung-Seok;Park, Young-Joo;Lee, Sueg-Geun
    • Analytical Science and Technology
    • /
    • v.8 no.3
    • /
    • pp.237-248
    • /
    • 1995
  • The simultaneous analysis of 16 organic pesticides, which are listed as a part of 129 priority pollutants by EPA(Environmental Protection Agency), was performed by GC-ECD(electron capture detector) and GC/MS-SIM(selected ion monitoring). Two extraction procedures from SW-846, sonication extraction and Soxhlet extraction, were somewhat modified and compared as an extraction and concentration method for the analysis of priority pollutants in soil. Accuracy and precision of the methods were reported from the calculation of mean recovery, mean relative standard deviation, and method detection limit.

  • PDF

Phytoremediation of Contaminated Soils (오염 토양의 phytoremediation)

  • Young-Gyun Cho;Sung-Keun Rhee;Sung-Taik Lee
    • Journal of Korea Soil Environment Society
    • /
    • v.2 no.1
    • /
    • pp.3-12
    • /
    • 1997
  • Phytoremediation, using plants to remediate toxic organic and inorganic pollutants in contaminated soils, is an emerging technology for environmental cleanup. Three strategies of this technology are applicable to the remediation of toxic heavy metals, radionuclides, and toxic organic pollutants: They are (1) phytoextraction, in which plants anumulate the contaminants and are harvested for the downstream processing; (2) phytodegradation, in which plant-released enzymes or plant-associated microorganisms convert toxic pollutants into non-toxic materials; and (3) phytostabilization, in which toxic pollutants are precipitated from solution or absorbed in either the plant tissue or the soil matrix. Phytoremediation is more effective and less expensive than other current treatment technologies.

  • PDF

Recent Advances in Titania-based Composites for Photocatalytic Degradation of Indoor Volatile Organic Compounds

  • Raza, Nadeem;Kim, Ki-Hyun;Agbe, Henry;Kailasa, Suresh Kumar;Szulejko, Jan E.;Brown, Richard J.C.
    • Asian Journal of Atmospheric Environment
    • /
    • v.11 no.4
    • /
    • pp.217-234
    • /
    • 2017
  • Indoor air pollutants can cause severe health problems, specifically in terms of toxicological impacts on human. Every day, a complex mixture of many air pollutants is emitted from various sources and subject to atmospheric processes that can create varied classes of pollutants such as carboxylic acids, aldehydes, ketones, peroxyacetyl nitrate, and hydrocarbons. To adhere to indoor air quality standards, a number of techniques such as photocatalytic oxidation of various volatile organic compounds (VOCs) have been employed. Among these techniques, titania ($TiO_2$) based photocatalytic reactions have proven to be the best benchmark standard approach in the field of environmental applications. Over the last 45 years, $TiO_2$-based photocatalytic reactions have been explored for the degradation of various pollutants. This review discusses the indoor air quality profile, types of indoor pollutants, available indoor air cleaning approaches, and performance of $TiO_2$-based catalysts. Finally, we have presented the perspectives on the progress of $TiO_2$ induced photocatalysis for the purification of indoor air.

Managerial Priority Derivation for Pollutants in Drinking Water (식수품질 저해요인 중 관리 우선순위 도출에 관한 연구)

  • Oh, Hee-Kyun;Lee, Hee-Chan
    • Journal of Korean Society on Water Environment
    • /
    • v.32 no.1
    • /
    • pp.80-88
    • /
    • 2016
  • The main purpose of this study was to derive managerial priority for pollutants in drinking water using the Delphi technique and analytic hierarchy process (AHP) method. We collected fundamental existing items based on a literature review for water pollutants, and deduced a total of 36 sub-items from nine core sectors, as follows: organic matter; inorganic substances; pathogenic organisms; chemicals; heavy metals; radioactive substances; sediment deposits; heat; and oil, and then conducted the first round of an expert study to ensure that objective indicators properly evaluate major issues for management of for drinking water quality. In the following round, the necessity and importance assessments of adjusted items were implemented using a content validity ratio index. Finally, items modified by Delphi surveys were applied to AHP. We computed weighted values by pair-wise comparison of sub-items and each of five sectors modified by the second round. According to the results of AHP, the managerial priority for pollutants in drinking water was as follows; while heavy metal placed first in importance, pathogenic organisms came second, followed by inorganic substances, organic matter and chemical substances from the sector perspective.

Mathematical Modelling of Biofilter for Waste Air Biotreatment (폐가스 처리에 대한 바이오필터의 수학적 모델링)

  • Im, Gwang-Hui
    • KSBB Journal
    • /
    • v.14 no.5
    • /
    • pp.550-560
    • /
    • 1999
  • There have been many research efforts on biofilter modeling including Ottengraf et al. who derived a model equation for the concentration profile of pollutants(e.g., VOCs) in the biolayer and solved their outlet concentration of the waste gas stream through biofilter. However, for most of research works done so far, the effects to explain the effect of adsorption of organic particles to medium(i.e., adsorbent) have been ignored. In this work biofilter modeling accompanying process lumping has been proposed and the theoretical effect of adsorption property of the medium, on the biofilter performance of eliminating organic components in waste gas stream, is intensively discussed.

  • PDF