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數種 土壤의 Polychlorinated biphenyls 吸着에 關한 調査硏究
- 數種 土壤의 Polychlorinated biphenyls 吸着에 關한 調査硏究
- Other Titles
- Soil Adsorption of Polychlorinated Biphenyls : for Kanechor 400
- Issue Date
- 대학원 약학과
- 수종토양; Polychlorinated biphenyls; 흡착
- 이화여자대학교 대학원
- The adsorption capacity of PCB was measured for the soils in the different qualities and particle sizes. Three different sorts of soil were taken to be examined in their physico-chemical characters and they were divided by the sieve in the particle sizes which were 10/20, 20/50, 50/100 and 100/200 mesh. The water sample containing PCB was prepared in 100㎍/ℓ solution of Kanechlor-400 and its quantitative analysts was determined using gas chromatography attached with OV-17 column and Electron Capture Detector
The results were as follows;
1. In 20/50 mesh of the particle, PCB was adsorbed in 18.92㎍/g in Soil Ⅰ and 22.18 ㎍/g in Soil Ⅱ cumulatively, which the main components were clay loams, and 4.57㎍/g in Soil Ⅲ which was composed mainly of sands. It was noted that even when the composition of soil was identical, the adsorption was decreased as the particle sizes increased.
2. Freundlich-isotherm equation (□ = KC^(□)) was applied to the soil adsorptions. The balues of the constants K & □ were 50.97 & 0.9868 for Soil Ⅰ, 785.8 & 0.3464 for Soil Ⅱ, and 306.33 & 0.2517 for Soil Ⅲ respectively.
3. Before the adsorption equilibrium was reached, the faster the retention time of isomer of Kanechlor-400, the lower was the adsorption rate. When the adsorption equilibrium was arrived at, isomer showed similar adsorption rates.;土壤中에서의 PCB의 吸着樣態와 流動을 調査硏究하기 위하여 土壤의 性質 및 粒子에 따른 PCB의 吸着能을 比較調査하였다. 三種의 土壤을 採取하여 그 物理化學的 性質을 調査하였고, 各各을 粒徑別(10/20, 20/50, 50/100 및 100/200 mesh)로 分類하여 PCB의 吸着能을 測定比較하였다. 試驗液은 Kanechlor-400의 100 ㎍/ℓ-水溶液(0.1% acetone)을 調劑使用하였으며, 그 定量分析은 OV-17 column과 Electron Capture Detector가 附着된 gas chromatography를 使用하였다. 그 結果는 다음과 같다.
1. 一定粒徑(20/50 mesh)에서, 1ℓ流入時에 累積된 PCB의 吸着量은 主成分이 clay loams(植質土壤)인 土壤Ⅰ과 土壤Ⅱ는 各各 18.92 ㎍/g, 22.18 ㎍/g이었으며, sands(砂土)가 主成分인 土壤Ⅲ은 4.57 ㎍/g이었다. 한편 同一成分을 갖는 土壤이더라도 粒徑이 클수록 吸着率은 減少하였다.
2. 充塡量에 따른 吸着量의 變化를 Freundlich-等濃度式(□=KC^(□);이때 m은 土壤의 充塡量(g), x는 土壤에 吸着된 PCB의 量(ng), C는 PCB의 最終流出濃度(㎍/ℓ)이며 K와 □은 常數이다.)으로 調査한 結果, 常數 K 및 □의 값은 各各, 土壤Ⅰ의 경우 50.97과 0.9868이었으며, 土壤Ⅱ는 785.8과 0.3464, 그리고 土壤Ⅲ은 306.3과 0.2517이었다.
3. PCB(Kanechlor-400)의 各 異性體는 吸着平衡에 到達하기 前에는 gas chromatogram上에서 retention time이 빠른 것일수록 土壤에서의 吸着率은 낮고, 吸着平衡에 到達하게 되면 異性體間의 吸着率도 비슷해지는 結果를 보였다.
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