| 2种脂类物质对多氯联苯的吸附特性研究 |
| 摘要点击 1295 全文点击 895 投稿时间：2009-12-15 修订日期：2010-03-23 |
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| 中文关键词 卵磷脂 甘油三酯 PCB28 吸附 |
| 英文关键词 phosphatidylcholine（PC） triglyceride（TG） PCB28 sorption |
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| 中文摘要 |
| 研究了2种脂类物质卵磷脂（PC）和甘油三酯（TG）对PCB28的吸附特性.结果表明，2种脂类物质均可以在8 h内达到对PCB28的吸附平衡，吸附量大，且 PC高于TG.在PCB28初始浓度为50～250 μg·L-1，随着PCB28初始浓度的增加，PC和TG对PCB28的绝对吸附量和相对吸附量均不断增加，其对PCB28的等温吸附均可以用Linear吸附方程较好表征，计算得到 PC和TG对PCB28吸附的KD值分别为38.84 L·g-1和20.14 L·g-1，PC对PCB28具有更强的吸附能力，脂肪酸碳链长度可能是影响脂类物质吸附机制的主要原因. |
| 英文摘要 |
| Sorption behaviors of PCB28 to phosphatidylcholine（PC）and triglyceride（TG）were studied. Results showed that sorption equilibrium could be achieved in 8 h for PCB28, and the sorption amount on PC was higher than that of TG when the initial PCB28 concentration is in the range of 50-250 μg·L-1. As the initial PCB28 concentration increases, the absolute sorption amount and relative sorption amount on PC and TG enhances. And linear isotherm is suggested as the most appropriated fitting type, sorption constants Kdcalculated from linear isotherm for PC and TG are 38.84 L·g-1and 20.14 L·g-1respectively, which suggested that PC had a higher sorption ability to PCB28 than that of TG, and the fatty acid chain length might be important factors to influence the sorption mechanism of PC and TG. |
