| 藻类有机物的特性以及对超滤膜的污染 |
| 摘要点击 2257 全文点击 2822 投稿时间：2009-03-20 修订日期：2009-06-16 |
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| 中文关键词 饮用水处理 藻类有机物 分子量分布 膜污染 荧光色谱 |
| 英文关键词 drinking water treatment algogenic organic matter(AOM) molecular weight fractionation membrane fouling fluorescence excitation emission matrix |
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| 中文摘要 |
| 采用凝胶色谱、亲疏水性、荧光色谱等方法研究铜绿微囊藻类有机物的特性.结果表明, 铜绿微囊藻类有机物(AOM)主要由亲水性组分构成,占78%,比紫外吸光度仅为1.1 L/(mg·m).超滤膜法测定结果表明,藻类有机物中相对分子质量>30 000的有机物占40%以上,并且主要由中性亲水性组分构成.荧光色谱分析表明,AOM中含有蛋白质类和腐殖质类物质.膜过滤试验表明,藻类有机物对超滤膜造成严重的通量下降,这可归结为大分子的中性亲水性组分堵塞膜孔的缘故. |
| 英文摘要 |
| Algogenic organic matter (AOM) was extracted from blue-green algae (Cyanobacteria) and its characteristics was determined by various methods including high-pressure size-exclusion chromatography (HP-SEC), hydrophobic and hydrophilic fractionation and fluorescence excitation emission matrix (EEM). The results showed that AOM was composed of hydrophilic fraction predominantly, account for 78%. The SUVA of AOM was only 1.1 L/(mg·m). The analysis for relative molecular weight (Mr) demonstrated that organic matter greater than 30 000 accounted for above 40% and mostly was composed of neutral hydrophilic compound. EEM analyses revealed that protein-like and humic substances existed in AOM. A test for membrane filtration exhibited that AOM could make ultrafiltration membrane substantial flux decline, which can be attributed to membrane pore clog caused by neutral hydrophilic compound with larger MW. |
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