• Title/Summary/Keyword: organic pollutant

Search Result 305, Processing Time 0.035 seconds

Trace Organic Contaminants in Sediments from Deep-sea Basin near Dokdo, Korea

  • Yim, Un-Hyuk;Oh, Jae-Ryoung;Hong, Sang-Hee;Li, Dong-Hao;Shim, Won-Joon;Choi, Hye-Kyung;Kim, Eun-Soo;Shim, Jae-Hyung
    • Ocean and Polar Research
    • /
    • v.24 no.4
    • /
    • pp.391-398
    • /
    • 2002
  • Trace organic contaminants in deep-sea sediments near Dokdo were analyzed. Total PAMs concentration ranged 14.8-314 ng/g dry weight and high molecular weight PAHs were dominant. The highest PAHs concentration was detected at A19 which located at Ulleung Basin. Most of organochlorines were under detection limit. Among the detected organochlorines, DDT compounds were dominant and followed by HCHs and HCB. Butyltin compounds and most of organophosphorus pesticides were not detected. Vertical distribution of PAHs showed typical sub-surface maximum and decreasing trends depending on depth. The highest PAHs concentration reached 454ng/g. Some organochlorines, DDT, HCH was detected and also showed decreasing trends. Other target organic pollutants were not detected in core sediments. Abnormally high level of PAHs concentration in A19 was discussed and the input sources were inferred to be the transport of sludge derived pollutant dumped at dumping site 'Byung' by deep current.

Behavior of Organic Matter, Chlorine Residual and Disinfection By-Products (DBPs) Formation during UV Treatment of Wastewater Treatment Plant Effluents (하수처리장 방류수의 UV 처리시 유기물질, 잔류염소 및 소독부산물 생성 거동)

  • Han, Jihee;Sohn, Jinsik
    • Journal of Korean Society of Water and Wastewater
    • /
    • v.28 no.1
    • /
    • pp.61-72
    • /
    • 2014
  • Study on effluent organic matter (EfOM) characteristic and removal efficiency is required, because EfOM is important in regard to the stability of effluents reuse, quality issues of artificial recharge and water conservation of aqueous system. UV technology is widely used in wastewater treatment. Many reports have been conducted on microbial disinfection and micro pollutant reduction with UV treatment. However, the study on EfOM with UV has limited because low/medium pressure UV lamp is not sufficient to affect refractory organics. The high intensity of pulsed UV would mineralize EfOM itself as well as change the characteristics of EfOM. Chlorine demand and DBPs formation is affected on the changed amounts and properties of EfOM. The objective of this study is to investigate the effect on EfOM, chlorine residual, and chlorinated DBPs formation with low pressure and pulsed UV treatment. The removal of organic matter through low pressure UV treatment is insignificant effect. Pulsed UV treatment effectively removes/transforms EfOM. As a result, the chlorine consumption is changed and chlorine DBPs formation is decreased. However, excessive UV treatment caused problems of increasing chlorine consumption and generating unknown by-products.

Photocatalytic activity enhancement of TiO2 with adding Zn particles

  • Seo, Hyeon Jin;Boo, Jang Heon;Jang, Hyun Woo;Kim, Mi Jeong;Boo, Jin-Hyo
    • Applied Science and Convergence Technology
    • /
    • v.25 no.6
    • /
    • pp.162-165
    • /
    • 2016
  • APhotocatalysis process uses ambient oxygen from air and irradiation, fundamentally UV light, to generate oxidation and reduction which can degrade almost all harmful organic and inorganic compounds to nontoxic substances. This study was focused on enhancement of photocatalytic activity which improves the photocatlytic efficiency with $TiO_2$ particle by mixing of certain amounts of Zn particles. We analyzed degradation of organic pollutant materials such as toluene and phenol with the mixed photocatalysis by using UV-visible spectrophotometer and obtained a result that photocatalytic activity is increased with increasing amount of Zn particle. Especially, in the case of $TiO_2$ (1 mmol) and Zn (0.1 mmol) mixture photocatalyst, we obtained at least 2 times higher photocatalytic activity compared with the commercially available $TiO_2$ photocatalyst (Degussa P-25), indicating that our mixed photocatalyts (Zn-doped $TiO_2$) is very effective of removing both organic dye and pollutants and the conversion rate of toluene is much faster than that of phenol.

TCE, PCE 측정을 위한 바이오센서의 특성

  • 류두현;김용미;최상일
    • Proceedings of the Korean Society of Soil and Groundwater Environment Conference
    • /
    • 2004.04a
    • /
    • pp.388-391
    • /
    • 2004
  • A sol-gel fiber-optic biosensor with encapsulated pH-sensitive fluorophore and immobilized genetically modified toluene-o-xylene monooxygenase was developed to detect TCE and PCE, which are carcinogenic chlorinate organic compounds prevailing in ground water. The sensitivity was characterized for the composition of sol-gel, and manufacturing procedure. The intensity curve reveals a linear range of intensity for pollutant concentration range of 0.01ppm and 1ppm. The change in intensity was appeared to be larger at each of L for same condition, and, therefore, the wavelength of λ was chosen for the analytical measurement.

  • PDF

The Status and Direction of State Implementation Plans to Improve Air Quality of the United States (미국 주 정부 실천계획의 현황 및 추진방향)

  • 신태주
    • Proceedings of the Korea Air Pollution Research Association Conference
    • /
    • 2000.04a
    • /
    • pp.49-51
    • /
    • 2000
  • 오존은 온도가 높고 태양 빛이 강한 여름철에 휘발성 유기화합물(Volatile Organic Compounds)과 질소화합물(NOx)의 광 화학 반응으로 생성되는 이차적 공해물질(Secondary Air Pollutant)이다. 성층권에 존재하는 오존은 피부암을 유발시키는 강한 자외선을 차단하고 흡수하는 고마운 존재이지만, 급속한 산업발달로 다량의 공해물질유출로 인해 생성된 지표면상의 오존은 대단히 유독해서 높은 농도에서 장시간 호흡 시 호흡기관의 장애는 물론이고 치사까지 이르게 하는 것으로 알려져 있다. (중략)

  • PDF

The Wate Quality Characterics of Fresh Water Lake by Small-Scale Dairy Farm (소규모 축산농가에 의한 담수호의 수질오염특성)

  • 김선주;이석호
    • Proceedings of the Korean Society of Agricultural Engineers Conference
    • /
    • 1999.10c
    • /
    • pp.727-733
    • /
    • 1999
  • In general ,wastes of livestock are covered 1% in the total wastes in Korea. But, actual pollutant loading rates by an organic material are 18% which will be serious problem in fresh water lake. An aim of this study is analyzing water quality in Bo-Ryeoung fresh water lake which are arounded by a lot of small livestock area, so that look for how to manage water quality of fresh waterlake.

  • PDF

Comparison of Pollutant Load Discharge Characteristics with Fertilizer Treatments from Small Scale Plot (소규모 시험포에서의 비료처리별 오염배출 농도 특성 비교)

  • Lyou, Chang-Woun;Shin, Yong-Cheol;Heo, Sung-Gu;Han, Yun-Su;Lim, Kyoung-Jae;Choi, Joong-Dae
    • Proceedings of the Korea Water Resources Association Conference
    • /
    • 2006.05a
    • /
    • pp.997-1001
    • /
    • 2006
  • Organic compost has been widely applied to the cropland because it has been thought as Environmentally Sound Agriculture (ESA) in Korea. In this study, two-year indoor rainfall experiments were performed. Surface runoff and groundwater volume from 10% and 20% slope plots were measured and water quality samples were collected and analyzed for BOD, COD, T-P and T-N. Flow weighted mean concentration (FWMC) values were computed to assess effects of various fertilizer treatments. FWMC BOD values for organic compost treated plots were higher than chemical fertilizer treated plots. FWMC BOD values for 20% slope plots were higher than those from those for 10% slope plots. The similar trends were found for COD and T-P. FWMC T-N values for chemical fertilizer treated plots were higher than organic compost treated plots. FWMC T-N values for 10% slope plots were higher than those for 20% slope plots. In Korea, excessive use of organic compost has caused extremely high levels of organic matter contents at the cropland. Since organic compost is very slow in releasing its nutrients to the soil, farmers usually apply excessive organic compost for immediate effects and maximum crop yields, which has been causing soil and water quality degradations. Therefore, thorough investigations for better nutrient management plans are needed to develop the ESA strategy in Korea.

  • PDF

Impact Assessment of River Water Quality using Organic Pollutant Index - Industrial Waste Water - (유기물오염도 지표를 이용한 하천수질영향평가 - 산업폐수의 방류수질을 기준으로 -)

  • Jo, Soo-Hyun;Kang, Mee-A;Choo, Yang-Yeop;Jeong, Gyo-Cheol;Jung, Dong-Hee;Yi, Jun-Heung
    • The Journal of Engineering Geology
    • /
    • v.16 no.4 s.50
    • /
    • pp.373-379
    • /
    • 2006
  • We investigated the relationship of the organic pollutant index in wastewater where the high percentages of an organic load to a water body was found. Measuring of TOC was to identify the relationship with COD and BOD which were used already. The correlation coefficient (r) of TOC/COD, BOD/COD and TOC/BOD were effected by the types of industry such as paper, textile, chemical, food and metal industries. In food industry it was found that the highest correlation coefficient (r) of TOC/COD, BOD/COD and TOC/BOD as 0.967, 0.969 and 0.990, respectively. There is low correlation coefficient in many cases. Hence it was impossible that the use of TOC for the water standard or monitoring instead of COD and BOD directly. However it can be used as alternative index to management a water process in the case of waste water where there was found high correlation coefficient of TOC/ COD, BOD/COD and TOC/BOD. It was sure that the water quality of river body can be protected if we use these the relationship among organic index.

Photo and Electrocatalytic Treatment of Textile Wastewater and Its Comparison

  • Singaravadivel, C.;Vanitha, M.;Balasubramanian, N.
    • Journal of Electrochemical Science and Technology
    • /
    • v.3 no.1
    • /
    • pp.44-49
    • /
    • 2012
  • Electrochemical and photochemical techniques have been proved to be effective for the removal of organic pollutants in textile wastewater. The present study deals with degradation of synthetic textile effluents containing reactive dyes and assisting chemicals, using electro oxidation and photo catalytic treatment. The influence of various operating parameters such as dye concentration, current density, supporting electrolyte concentration and lamp intensity on TOC removal has been determined. From the present investigation it has been observed that nearly 70% of TOC removal has been recorded for electrooxidation treatment with current density 5 mA/$dm^2$, supporting electrolyte concentration of 3 g/L and in photocatalytic treatment with 250 V as optimum lamp intensity nearly 67% of TOC removal was observed. The result indicates that electro oxidation treatment is more efficient than photocatalytic treatment for dye degradation.

The hydrocarbon concentration distribution in the contaminated site using geospatial analysis

  • Lee, Ju-Young;Yang, Jung-Seok;Choi, Jae-Young;Krishinamurshy, Ganeshi
    • Proceedings of the Korea Water Resources Association Conference
    • /
    • 2007.05a
    • /
    • pp.909-910
    • /
    • 2007
  • The volatile organic compounds exposure is governed by the source distance and dispersion of the pollutant into air and groundwater. The purpose of this study was to validate suggested models for the prediction of concentration distributions. The study design was organized into different methods to simulate industry site. The distribution models generally showed a fair agreement with measured data. For graphical representation of concentration of volatile hydrocarbon, it has to obtain a continuous representation of the contamination of the site. Therefore, the used interpolative methods examined for this project are the IDW(inverse Distance Weighting) and kriging method. In the results, in summary, all two different methods can be used to quantify exposures at a particular source area, and thus provide, a solid foundation for making risk-based decisions. All the calculations can be performed using Excel's built-in functions, and the capabilities of geospatial analysis allow the results to be displayed visually. However, anyone who uses these methods should understand all of the assumptions and limitation.

  • PDF