腐殖酸負(fù)載載體對(duì)菲的吸附能效

摘要：土壤腐殖酸的吸附作用對(duì)多環(huán)芳烴等疏水性有機(jī)污染物的遷移產(chǎn)生影響.針對(duì)腐殖酸負(fù)載載體的吸附能效開(kāi)展研究,利用不同粒徑的玻璃珠(37～63、105～125、177～250和350～500 μm)作為載體,從土壤中提取腐殖酸并負(fù)載其上進(jìn)行菲的吸附對(duì)比試驗(yàn),結(jié)果表明,菲在固液兩相的分布規(guī)律符合Freundlich吸附等溫式,粒徑較小的材料(比表面積較大)負(fù)載效率高且整體吸附能力強(qiáng).采用吸附能力系數(shù)與負(fù)載效率的比值評(píng)價(jià)吸附能效,表現(xiàn)為粒徑較小的材料(比表面積較大)吸附能效反而偏低.本文為提高腐殖酸吸附能效的應(yīng)用研究提供了理論基礎(chǔ).Abstract：Humic acid in soil plays an important role in transfer of hydrophobic organic compounds such as polycyclic aromatic hydrocarbons (PAHs).Humic acid can be coated onto some carriers,and its adsorption performance is of great concern.In this study,glass beads in four different size ranges (37-63 μm,105-125 μm,177-250 μm,350-500 μm) were used as the carrier and coated with humic acid extracted from natural soil.The lab-scale experiment for phenanthrene adsorption was carried out.The distribution of phenanthrene in solid and water phases was in accordance with Freundlich isotherms,which implies that larger total surface area (TSA) leads to higher coating efficient and adsorption capacity.However,when the ratio of Freundlich capacity parameter to coating efficiency was used to evaluate the adsorption performance of humic acid in consideration of TSA,smaller particles (with larger TSA) resulted in a smaller ratio value.This study provides a reference for further studies on improvement of adsorption of humic acids. 作者： 章真怡李廣賀 Author： ZHANG Zhenyi  LI Guanghe 作者單位： 清華大學(xué)環(huán)境科學(xué)與工程系,北京,100084 期 刊： 化工學(xué)報(bào)   ISTICEIPKU Journal： CIESC JOURNAL 年，卷(期)： 2010, 61(4) 分類號(hào)： X131.3 關(guān)鍵詞： 腐殖酸    菲    吸附    Keywords： humic acid    phenanthrene    adsorption    機(jī)標(biāo)分類號(hào)： S1 TV1 機(jī)標(biāo)關(guān)鍵詞： 土壤腐殖酸    負(fù)載    載體    吸附能力    能效    adsorption performance    humic acid    polycyclic aromatic hydrocarbons    Freundlich    hydrophobic organic compounds    疏水性有機(jī)污染物    比表面積    粒徑    surface area    transfer of    size ranges    吸附等溫式    提取腐殖酸    study    experiment 基金項(xiàng)目： 國(guó)家自然科學(xué)基金

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