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토지이용실태에 따른 하남산업단지 토양오염물질 분포 특성에 관한 연구
공화진,위환,김승호,박옥현,장길식,정희윤,배석진,정숙경,조영관,Kong, Hwa-jin,Wi, Whan,Kim, Seung-ho,Park, Ok-hyun,Jang, Gil-sik,Jung, Hee-yun,Bae, Seok-jin,Jeong, Suk-kyung,Cho, Young-gwan 한국지하수토양환경학회 2018 지하수토양환경 Vol.23 No.2
Soil contamination survey was conducted during March - July, 2017 to obtain soil contamination profile of 16 organic and inorganic contaminants in Hanam industrial complex located in Gwangju, Korea. The concentrations of all surveyed contaminants except Cd showed were within 0.3~1.5 times of their natural background levels. Cd showed concentrations as high as 6.9 times of the background level, signifying the influence of the metal processing facilities in the complex. The concentrations of Zn, Pb and Hg in areas nearby industrial facilities were 1.3~5.5 times higher than those within the facility and green area. The concentration of Cu in the green area was 1.4~2.9 times higher than in other areas. The Soil Pollution Index (SPI) analysis revealed 54% of the total area belong to first-grade soil, 43% to second-grade, and 3% to third-grade. The Enrichment Factor (EF) of Zn, Pb, and Cd were 9.2, 15.6, and 88.5, respectively, indicating high accumulation and contamination of the soil with Cd.
GIS를 이용한 광주지역의 토양오염 우려지역에 대한 토양오염도 평가 및 시각화 연구
민경우,박옥현,공화진,김지혜,정희윤,김연희,배석진 한국환경기술학회 2020 한국환경기술학회지 Vol.21 No.1
To make the assessment of soil contamination in Gwangju, we conducted an analysis from 2014 to 2018 about 22 factors as the Korean Soil Contamination Warning Standards. According to the results, we also visualized the soil contamination point map in each sampling site. The average concentration are below the Korean Soil Contamination Warning Standards. As a results of contamination assessment by land use, the major contaminants are arsenic in railroadrelated facilities and railroad tie area and nikel in shooting rangerelated facilities area. The soil pollution index (SPI) of heavy metals on total 459 sites showed 87.8 % of 1st level (good condition), 8.7 % of 2nd level (concern for contamination), 1.5 % of 3rd level (concern for contamination), and 2.0 % of 4th level (considered as contaminated). In case of point contaminant concentration distribution in each items, 72 % of cadmium was below 1.0 ㎎/㎏, 90 % of arsenic was below 1.0 ㎎/㎏, 91 % of copper and lead were below 50.0 ㎎/㎏ respectively, 60 % of nikel was below 10.0 ㎎/㎏, 92 % of mercury was below 0.1 ㎎/㎏, 68 % of TPH was below 100 ㎎/㎏ and 43 % of fluorine was below 200 ㎎/㎏.
광주지역 하수처리시설의 TOC 농도 분포와 유기물질간 상관분석 연구
박옥현,민경우,공화진,서재봉,정희윤,정숙경,배석진,조영관 한국수처리학회 2019 한국수처리학회지 Vol.27 No.2
This study, subject to influent and effluent of public sewerage facilities in Gwangju city, is to comprehend the behavior of TOC, analyze the correlations with organic materials. As the influent flows into sewerage facilities, each average concentration was TOC 55.8 mg/L, DOC 34.9 mg/L, BOD 132.4 mg/L, CODMn 62.1mg/L and the item's average concentrations of the effluent was TOC 9.6 mg/L, DOC 6.9 mg/L, BOD 4.8 mg/L, CODMn 9.0mg/L respectively. The concentration of DOC indicated higher than POC from both the influent and effluent; thereby demonstrating the concentration of dissolved organic materials was contributing more to the concentration of TOC. The oxidization rate of C-BOD/TOC 96.3% in influent, 13.3% in effluent showed large deviation with having variation based upon the size of sewerage facilities. Whereas the oxidization rate of CODMn/TCO 42.5% in influent, 36.2% in effluent did not deviate as much, in regards to the size of sewerage facilities. As the correlation coefficient value with TOC, a large-size sewerage facility was BOD 0.657 (p<0.01), CODMn 0.631 (p<0.01), CODCr 0.571 (p<0.01) and a small-size sewerage facility was CODMn 0.765 (p<0.01) in influent. A large-size sewerage facility showed relativity of TOC with CODMn 0.751 (p<0.01) and a small-size sewerage facility indicated a close correlation with BOD 0.921 (p<0.01), CODMn 0.834 (p<0.01), CODCr 0.0.786 (p<0.01) in effluent respectively.
광주지역 어린이 놀이시설 마감재의 중금속 노출에 의한 인체 위해성평가
윤상훈,김소영,조은,남태희,박진환,공화진,이기원,서광엽,박정훈,민경우 한국환경보건학회 2024 한국환경보건학회지 Vol.50 No.2
Background: Children who use playground facilities are exposed to potential risks due to the high concentration of heavy metals contained in the finishing materials of facilities in children's playgrounds. Objectives: The purpose of this study was to investigate the concentration of heavy metals in the finishing materials of outdoor children's playgrounds where harmful heavy metals exist in Gwangju and to conduct human risk assessment for children and adults by age to find the risks and limitations. Methods: The bottom and top layers of double-painted paint were peeled off and collected together from the finishing materials of children's play facilities such as slides, swings, and seesaws in 147 children's parks in Gwangju. Heavy metals were analyzed using ICP-OES, etc., and human risk assessment was performed using the concentrations of heavy metals. Results: Based on 1.0E-04, which requires legal regulation, CTE was found to pose a carcinogenic risk for preschool children and no carcinogenic risk for the rest of the age groups. However, RME showed that both men and women of all ages had a carcinogenic risk. For reference, when the carcinogenic risk was based on 1.0E-06, CTE was found to pose a carcinogenic risk from infants to elementary school students, and RME was found to have a carcinogenic risk in all age groups. It was judged that there is a non-carcinogenic risk if the non-carcinogenic risk exceeds 1 based on the hazard index (HI) 1. In CTE, there was no non-carcinogenic risk, and RME for preschooler males (1.49E+00) and females (1.56E+00) were found to have non-carcinogenic risk. Conclusions: This study was meaningful in that it examines the differences in the current management of heavy metals concentration standards and potential carcinogenic and non-carcinogenic risks to the human body and discusses the relationship between heavy metals and human health effects.
마을하수처리시설(BBF-DNS공법)에서 응집 및 질소처리공정 효율 향상에 관한 연구
박옥현 ( Ok-hyun Park ),위환 ( Hwan Wi ),김승호 ( Seung-ho Kim ),공화진 ( Wha-jin Kong ),장길식 ( Gil-sik Jang ),배석진 ( Seok-jin Bae ),조영관 ( Young-gwan Cho ),김은선 ( Eun-sun Kim ) 한국수처리학회 2017 한국수처리학회지 Vol.25 No.2
In this study, small-size rural sewage treatment facility with BBF-DNS method were diagnosed treatment efficiency and investigated how to improve facilities by process. The coagulant was added to the coagulating sedimentation tank by using a stream of influent water to which sewage was pumped as a raw solution. The biofilter tank continuously was injected oxygen through the oxygen feed pump and prevented the filter pores from being blocked by the influent. In the denitrification tank, the backwash plate was reinstalled to uniformly disperse air during the backwash and the number of backwash was increased to prevent re-contamination by the sediment. The BOD of the effluent before the facility improvement was 9.2 mg/L, COD of 16.4 mg/L, SS of 15.1 mg/L, T-N of 24.289 mg/L and T-P of 1.974 mg/L, respectively. After the facility improvement, effluent BOD was 3.7 mg/L, 97.2% of the treatment efficiency compared to the influent, COD was 11.6 mg/L, 80.5%, SS was 7.2 mg/L, 95.4%, T-N 8.258 mg/L was 75.5% and T-P was 1.013 mg/L, 76.9% and all items met the effluent quality standards of the public sewage treatment facility. The nitrification rate was 32.4% and the denitrification rate was 41.1% before the facility improvement, but were improved to 76.9% and 86.2%, respectively.