| 新型氨化菌丝体吸附剂的制备及吸附典型内分泌干扰物的研究 |
| 摘要点击 1745 全文点击 1066 投稿时间：2007-03-26 修订日期：2007-05-14 |
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| 中文关键词 菌丝体吸附剂 内分泌干扰物 静电作用 吸附 |
| 英文关键词 fungal biomass sorbent endocrine disruptor electrostatic interaction adsorption |
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| 中文摘要 |
| 以产黄青霉(Penicillium chrysogenum)菌丝体为原料，通过2步化学反应将含有大量氨基的聚乙烯亚胺(PEI)嫁接到菌丝体表面，优化反应条件，得到最佳的氨化菌丝体吸附剂.该氨化吸附剂的等电点为pH 10.2，是一种表面带正电荷的菌丝体吸附剂，能有效吸附水中的阴离子内分泌干扰物五氯酚钠(PCP)、2,4-二氯苯氧乙酸(2,4-D)和全氟辛烷磺酸钾(PFOS).3种污染物的吸附等温线符合Langmuir方程，15℃时最大吸附量分别为342.9、 234.1、 1 725.6 mg/g.热力学计算表明，3种污染物的吸附均是自发发生的，2,4-D和PFOS的吸附是吸热反应，而PCP是放热反应. |
| 英文摘要 |
| The fungal biomass of Penicillium chrysogenum was used as raw materials to prepare the sorbent, and polyethylenimine (PEI) was grafted onto the biomass surface in a two-step reaction. The best sorbent was obtained through the optimization experiments. As the PEI-modified biomass was found to possess zero ζ-potential at pH 10.2, the biosorbent is favorable for the removal of anionic pentachlorophenol（PCP）, 2,4-dichlorophenoxyacetic acid (2,4-D) and perfluorooctane sulphonate (PFOS) potassium in water. The sorption isotherms of the biomass for three pollutants were well described by Langmuir equation, with a maximum sorption at 342.9 mg PCP, 234.1 mg 2,4-D and 1725.6 mg PFOS per g biomass. The thermodynamic parameters calculated show that the sorption for three pollutants was spontaneous, and the sorption for 2,4-D and PFOS were endothermic, while the sorption for PCP was exothermic. |
