The emission characteristics of VOCs (Volatile Organic Compounds) from assembly metal product manufacturing industry (Korean standard industry classification code: 28) were studied. The sampling was carried out at 54 sites in Shiwha-Banwol industrial area with 3 M OVM (Organic Vapor Monitor) #3500 from August to October in 2008. The EPA 8020/8040 (10 chemicals) was used as a standard solution for the quantitative analysis with GC/FID. As the results, the VOCs concentration appeared to range from 0.9 ppb to 22,721.1 ppb, and the average concentration ratio of benzene : toluene : ethylbenzene : m,p-xylene : o-xylene : styrene appeared to be 0.005 : 1.000 : 0.198 : 0.096 : 0.057 : 0.110. Total VOC concentration of the "Manufacture of Structural Metal Products, Tanks, Reservoirs and Steam Generators" (KSIC code: 281) appeared to be seven times higher than that of "Manufacture of other fabricated metal products; metal working service activities" (KSIC code: 289).

Desorption characteristics of waste activated carbons collected from chemicals manufacturing industries in Shiwha/Banwal industrial complex were investigated. Activated carbons were decomposed in a thermogravimetric analyzer (TGA) at 513K with heating rate of 10 ℃/min under nitrogen atmosphere. Activation energies and reaction orders for desorption, from the waste activated carbon were estimated by employing Friedman method and Freeman-Carroll method. It was found that the reaction orders of desorption in waste activated carbons were 0.27-1.69, and activation energies were 15.2-45.7 kJ/mol in Friedman method and 13.7-17.1 kJ/mol in Freeman-Carroll method.

시화호 초지대의 소각에 의한 조류의 서식 영향에 대한 연구는 2007년 3월에서 10월까지 경기도 화성시 마도면 송정리 인근 시화호간척지의 초지에서 실시하였다. 계획소각은 2007년 2월 28일에서 3월 1일까지 시화호 간척지의 초지 중 육상부에 인접한 지역에 대해 실시하였다. 소각지역에서는 총 30종 최대개체수 합계 181개체의 조류가 관찰되었으며, 존치지역에서는 24종 최대개체수 합계 154개체가 관찰되어 소각지역의 관찰조류 종수와 개체수가 높았다. 하지만 우점종은 소각지와 존치지간에 차이가 없었다. 수조류와 산림성조류를 제외한 소각지와 존치지의 평균 종수, 평균개체수, 종 다양도, 종 풍부도는 차이가 없었다. 초기의 군집특성은 계획소각에 의하여 변화하였지만, 후기에는 차이가 감소하였다. 계획소각에 의한 서식지 교란은 일시적으로 새로운 서식지 및 취식장소를 제공하였다. 계획소각이 목본식물의 유입을 차단하여 초지생태계를 유지하는 효과적인 방법이며, 주기적인 계획소각이 초지생태계를 유지 및 관리하는 효율적인 방안임을 제안하고자 한다.

The purpose of this research is to evaluate the odor exhaust characteristics of Sihwa and Banwol industrial complex during one year in 2007 by the automatic odor analyzer. As the continuous monitoring results on the 54 odor items, the highest average concentrations in two complexes were p-diethylbenzene, ammonia, toluene and methylethylketone. The items haven highest contribution rate in Sihwa and Banwol industrial complex were Dimethyl sulfide, i-Valerie acid, i-Valer aldehyde, Valerie acid, Trimethylamine and Etylmercaptan, Hydrogen sulfide, Dimethyl sulfide, Formaldehyde, Trimethylamine. When the odor concentrations converted into the total odor intensity, The percentages of hour data appeared over 3 degree of odor intensity were 0.5% (40 hr) in Sihwa station and 3.0% (210 hr) in Banwol station, respectively. Over 1 degree of odor intensity which is odor threshold value also were 68.3% in sihwa station and 82.5% in Banwol station, respectively. The highest monthly odor intensity was shown in January and February. Therefore, continuous monitoring system for odor compounds through the odor automatic station seems to be the most efficient method for investigating odor exhaust characteristics.

공장 폐수로 인한 오염이 심한 경기 시화호에서 오염정도가 다른 두 지역으로부터 풀망둑을 채집하여 이들의 해독효소계 또는 항산화효소계의 반응을 비교하였다. 해독효소계에서 I상효소로는 CYP, P450R, b5R, EROD를, II상효소로는 GST를 조사하였다. 그리고 항산화효소계로는 CAT, GR, CPx의 활성 그리고 GSH및 CSSG농도를 조사하였다. 그 결과, 오염정도가 심한 지역에서 잡은 어류가 간장 중 P450R, b5R, GST의 활성이 높았으

In this study, the removal efficiency of 24 odorous compounds was measured in diverse control process units of 7 individual chemical companies located in Ban-Wall & Shi-Wha Industrial Complex in Gyeonggi-do, Korea from March to August, 2007. To quantify the removal efficiency rates of major odorous compounds, we collected odor samples from the inside process and both the front and rear side of 7 control process units. As the results of this study, it was shown that toluene, ammonia, trimethylamine (TMA) and acetaldehyde were dominant odorous compounds in the inside process. In addition, VOCs, TMA and acetaldehyde were also detected at higher concentrations in the stacks and 10 (toluene, acetone, ethyl benzene, xylene etc.) out of 24 index compounds were found to have negative removal efficiencies. According to the removal efficiency evaluation of seven odor control facilities, a company equipped with two connected absorption processes was shown to have positive (＋) removal efficiencies for 16 odor substances and NH₃, TMA, acetaldehyde, the priority odor substances, which meant the proper control system was installed and operated. Hence, to obtain best removal efficiency of odorous pollutant emission, the database on source characteristics and the development of management techniques of diverse control process units are continually needed.

Formaldehyde is important because of its irritant and toxic properties, mutagenicity and carcinogenicity, In this study, liquid chromatography/mass spectrometry (LC/MS) was used for the analysis of formaldehyde after derivatization with 2,4-dinitrophenylhydrazine (DNPH) cartridge. Analytical parameters such as linearity, repeatability and minimum detection limit were evaluated. The linearity (r²) was 0.9999 when analyte concentration ranges from 50 to 400 ㎍/L. The relative standard deviation (%RSD) was 0.83% for the concentration of 400 ㎍/L, and the minimum detection limit (MDL) was 0.27 ppbv. We investigated the distribution of formaldehyde concentrations based on a total of 96 samples(industrial area : 32, complex boundary line : 32, affected (residential) area : 32) measured at the Shi-Hwa industrial complex from April to October 2006. By the statistical analysis of these measurement data, the average level of formaldehyde from industrial area, complex boundary line, and affected area was 2.7, 2.1, and 2.2 ppb during the daytime (10:00~16:00), and 1.4, 1.1, and 1.6 ppb during the nighttime (19:30~23:00), respectively. And also, we investigated the emission concentrations of formaldehyde from various emission sources of 33 individual companies located in the Shi-Hwa industrial complex from September to November 2006. The results of our study showed that the emission concentrations of formaldehyde greatly varied according to industrial and source types. The emission concentrations of formaldehyde showed in the descending oder of 11.4 ppm for insulation cable process, 2.0 ppm for sand casting process, 1.7 ppm for synthesis rubber process, and 1.3 ppm for hexamine process.

We investigated dilution ratio values of the threshold limit (DRVTL) and 12 odorous compounds from a number of emission points (stack and process) and boundary areas of 10 chemical industries in the Ban-Woll and Shi-Wha Industrial Complex in Gyeonggi Province. The results of our study suggest that differences in odor emission concentrations are caused by such as factors as : suitability and operational conditions of prevention equipment, suitability hood of process and exhaust ventilation system, differences of raw materials of chemical industry. It was found that trimethylamine and hydrogen sulfide recorded the highest contribution from two types of emission points (stack and process), respectively. Show some actual concentration values here, hydrogen sulfide recorded its maximum values from leather industry, while trimethylamine for hexamine production industry. On the other hand, the results of dimethyl sulfide, dimethyl disulfide and methyl mercaptan were not useful, as their concentrations were not significantly high enough to judge from such respect. In the view-point of dilution ratio values of the threshold limit, the average emission ratio of stack and process from 10 chemical industries was 57, 43%, respectively. Therefore, it is important that the odor emission value from process and stack have to minimize and regulate for management of industrial odor.

The VOCs discharge characteristics of miscellaneous assembly metal manufacture & metal processing industries, in the SihwaㆍBanwol Industrial Complex, were analyzed according to detailed categories per industry, as based on the Korea Standard Industrial Classification, by comparing the conditions before and after the installation of process and prevention facilities. The average concentration of benzene was highest in the metal heat treatment industry (28921) whereas that of toluene was highest in the painting & membrane treatment industry (28923). In addition, with respect to prevention facilities, our evaluation proved that the decreased efficiency was worse for the discharge facilities of pollutants from the plating industry (28922) and painting & miscellaneous membrane treatment industry (28923), with some exceptions, while most facilities showed no decreased efficiency. Therefore, it is believed that an accurate survey of the conditions of administration/operation facilities will need to be conducted, and the decreased efficiency will also need to be evaluated so that adequate prevention facilities can be reviewed and selected.

The objectives of this investigation are as follows: 1) To sort out places of businesses that have to do with the discharge of offensive odor 2) To find out what generates offensive odor 3) To check the current status regarding offensive odor. The investigation is held through complete enumeration of approximately two thousand businesses concerning the SihwaㆍBanwol Industrial Complex. The local residents have directly visited related businesses and performed the following investigations: 1) General status check 2) Area source 3) Point source The investigation of offensive odor is utilized by direct olfactory method in six levels. Through this method, the followings have been established as DB: Degree of offensive odor, type of odor, preventive facility status, etc. The major characteristic of this investigation is that local residents have directly visited individual businesses and checked the status of offensive odor, which opens up a possibility of mutual settlement for the reduction of offensive odor between businesses and local residents. Businesses and local residents can share a common understanding and this means a great deal. Furthermore, it is widely expected that the investigation data can be utilized as a source for presuming the origin of offensive odor in case of civil petition.