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울산지역의 대기-대기침적-토양의 UPOPs(PCDD/DFs, Dioxin-Like PCBs와 Hexachlorobenzene; HxCB)의 평가
옥곤 ( Gon Ok ),이석형 ( Seok Hyung Lee ),황인자 ( In Ja Hwang ),황성민 ( Sung Min Hwang ) 한국환경분석학회 2009 환경분석과 독성보건 Vol.12 No.4
This study was performed to figure out the characteristics of concentration and profile pattern of Unintentional Persistent Organic Pollutants(UPOPs; PCDD/DFs, DLPCBs, HxCB) in the ambient air, atmospheric deposition and soil in Ulsan area. The correlation among the concentration of the ambient UPOPs, depositing velocity, flux and other meteorological factors was examined during the ambient process of the UPOPs. Furthermore, deposition flux from the ambient to the surface was calculated to estimate the contribution of deposition to soil pollution. The result shows that the annual deposition flux from the ambient to the soil in Ulsan was 4.6 ng WHO-TEQ/m2/year, 3.3ng WHO-TEQ/m2/year and 0.2ng van Birgelen98-TEQ /m2/year, respectively. The total amount of UPOPs fluxing into the ground from the ambient air was estimated as 10.9 g TEQ/year. In this study, deposition flux value of TEQ exceeds the European guideline or limit. The profile patterns of UPOPs in the ambient-deposition-soil were similar. From the study, the importance of the soil pollution by the deposition through the atmospheric process of pollutants exhausted from the sources was proved.
부산지역 강우의 화학적 특성 I. pH 및 주요이온의 시ㆍ공간적 변화
전은주,양한섭,옥곤,김영섭,Jeon, Eun-Ju,Yang, Han-Sub,Ok, Gon,Kim, Young-Sub 한국환경과학회 1998 한국환경과학회지 Vol.7 No.5
The chemical characteristics of precipitation was investigated in Pusan area. Samples were collected from January to November in 1996 at 4 sites, and analyzed pH, major soluble ionic components(C $l^{[-10]}$ , N $O_3$$^{[-10]}$ , S $O_4$$^{2-}$, N $a^{+}$, $K^{+}$, N $H_4$$^{+}$, $Mg^{2+}$, $Ca^{2+}$). The order of anion and cation concentrations for the initial precipitation were C $l^{[-10]}$ > S $O_4$$^{2-}$ > N $O_3$$^{[-10]}$ , and $Ca^{2+}$ > N $a^{+}$ > N $H_4$$^{+}$ > $Mg^{2+}$ > $K^{+}$, respectively. At coastal sites(P1 and P2) C $l^{[-10]}$ and N $a^{+}$ of maritime sources (seasalt) were high, but at inland sites(P3 and P4) nss-C $a^{2+}$ and nss-S $O_4$$^{2-}$ were high. Calcium ion for the initial precipitation showed high value of enrichement factor(EF) relative to seawater composition. The contribution of seasalt to the composition of precipitation was higher at bite P1 (53.5%) than those of the other sites. Throughout the year the concentrations of major ions for the initial precipitation were low in the heavy rain season. The mean pH for the initial precipitation was 5.4 and showed the negative relationship with the precipitaion amount. The S $O_4$$^{2-}$ and N $O_3$$^{[-10]}$ do not play an important role in rain acidification due to the high(97%) neutralizing effect of amonia and calcium species.and calcium species.
박노진 ( No Jin Park ),옥곤 ( Gon Ok ),허성남 ( Seong Nam Heo ),임영경 ( Young Kyong Lim ),이재관 ( Jae Kwan Lee ) 한국환경분석학회 2012 환경분석과 독성보건 Vol.15 No.3
Five organic chlorinated pesticides (OCPs) were monitored for the water samples in the Nakdong river basin. Samples were collected from the 33 representative points and the 5 industrial complex discharge points over 6 sampling events. Heptachlor and trans-heptachlor epoxide were not detected for all samples while dieldrin was detected once at the first sampling event. The measured concentrations of hexachlorobenzene and cis-heptachlor epoxide for the representative sites ranged from N.D to 0.0057 ng/L and from N.D to 0.078 ng/L, respectively. The levels of hexachlorobenzene and cis-heptachlor epoxide were N.D to 0.173 ng/L and N.D to 0.134 ng/L, respectively. It seems like that risk at the monitored level of organic chlorinated pesticide was not serious. However, the maximum concentration of cis-heptachlor epoxide exceeded the water quality criteria (WQC) of U.S EPA. The average concentrations of organic chlorinated pesticides for the industrial complex discharge points were relatively higher than those for the representative sites of the Nakdong river, however, the risk by industrial OCP discharge seems also not serious.