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키틴에 의한 중금속 Cd(II), Pb(II)이온의 흡착 및 회수에 관한 연구
김은경,조영구,권영두,박미아,김한수,박광하,Kim, Eun-Kyung,Cho, Young-Koo,Kwon, Young-Du,Park, Mi-A,Kim, Han-Soo,Park, Kwang-Ha 한국분석과학회 2002 분석과학 Vol.15 No.2
수산가공 폐기물로 버려지는 게 껍질로부터 chitin을 추출하여 중금속 흡착제로 이용하였으며, 이 흡착제에 대해 Cd(II) 및 Pb(II) 이온의 흡착특성을 연구하였다. Chitin에 대한 Cd(II) 및 Pb(II) 이온의 흡착속도는 반응시간 2분경에 최대흡착량에 도달하였으며, 중금속 흡착에 미치는 pH의 영향은 두 이온 모두 pH 7.0>10.5>3.5순임을 알 수 있었다. Chitin에 대한 흡착률은 Cd(II)이온이 21${\sim}$99%이며, Pb(II)이온이 24${\sim}$95%이다. Cd(II)이온의 회수율은 22${\sim}$53%이고, Pb(II)이온의 회수율은 22${\sim}$73%로 나타났다. 이들 중금속 이온의 흡착양상은 Freundlich 흡착등온식에 비교적 잘 적용되었다. The adsorption characteristics of Cd(II) and Pb(II) ions has been studied by using chitin as an adsorbent. The pure chitin was obtained from the extraction of red-crab shell dumped by fish factory. Adsorption kinetics of Cd(II) and Pb(II) ions on the chitin reached at the maximum adsorption within two minutes. Adsorbed amounts of heavy metals were pH 7.0>10.5>3.5 in the following order. Adsorption ratio by chitin was 21${\sim}$99% for Cd(II) ion and 24${\sim}$95% for Pb(II) ion. Recovery ratio of Cd(II) ion on the chitin was 22${\sim}$53%, and that of Pb(II) ion was 22${\sim}$73%. The adsorption behavior of these heavy metals was explained well by Freundlich adsorption isotherm.
박광하 ( Kwang Ha Park ),권영두 ( Young Du Kwon ) 한국환경분석학회 2012 환경분석과 독성보건 Vol.15 No.2
We analyzed the overall pollution states within the lake hyangho. From the point pollution source, pollution loadings of living wastewater were more strong than excretions and livestock wastewater followed with pig>korean beef>milk cow>dog>deer. Non point pollution source was 475.4 kg/km2 · day, relatively small than point pollution source. Sediments in lake hyangho represented that rate of water content was 44.4~63.9%, pH was 6.73~8.06, COD was 19.7~73.3 mgO2/g dw, Mn was 0.050~0.168 mg/g dw,, Fe was 0.918~1.470 mg/g dw. Water qualities in lake hyangho showed that pH was 7.9~9.0, BOD was 3.1~6.8, COD was 6.4~15.7 mg/ L, DO was over 7.5 mg/L, conductivity was 6,348~23,415 μS/cm. Specially T-N was 0.548~0.967 mg/L and T-P was 0.027~0.061 mg/L. These materials conformed to 3 level as water quality class and generated eutrophication. It is necessary to improve the water quality in lagoon. So we will continue to study the overall impacts around lagoons in the eastern coast.
박광하 ( Kwang Ha Park ),권영두 ( Young Du Kwon ) 한국환경분석학회 2012 환경분석과 독성보건 Vol.15 No.1
In this study, we represents the characteristics of process for a sewage treatment in korea. In case of standard activated sludge process, the results represent that BOD is 90.8%, COD is 82.2%, SS is 95.9% and E-coli is 99.4%. But T-N is 43.3% and T-P is 58.1%. Secondary treatment process shows that BOD is 91.5%, COD is 73.7%, SS is 88.4% and E-coli is 98.1%. But T-N is 35.4% and T-P is 39.6%. The ministry of environment strengthen the disposal criterion of T-N and T-P in sewage. This law shall come into force on January 1, 2012. We know the limits of removal for the N and P in treatment system. It should be reinforced to the advanced process in present plants.