摘要
以微污染黄浦江原水作为研究对象,采用反渗透工艺和离子交换技术对水中溶解性有机物进行浓缩和分离,分析了溶解性有机氮(DON)的分子质量和亲、疏水性分布规律,并采用氢同位素的核磁共振法、三维荧光光谱分析法和傅里叶变换红外光谱法表征了DON的组成。结果表明,原水中的DON以小分子为主,其平均分子质量略大于以DOC和UV254表征的有机物;DON的中性亲水性组分所占比例最高,明显大于DOC和UV254;类蛋白类有机物、胺基类、芳香类化合物对DON的贡献较大;原水中的DON包含有氮氢类化合物、脂肪烃有机物、饱和碳氢化合物等。
Dissolved organic matters in micro-polluted raw water from Huangpu River were concen- trated and separated using reverse osmosis process and ion exchange technology. The molecular weight distribution and hydrophilic-hydrophobic characteristics of dissolved organic nitrogen （DON） were ana- lyzed, and the composition of DON was characterized by hydrogen isotope nuclear magnetic resonance, three-dimensional fluorescence spectrum and Fourier transform infrared spectroscopy. The results showed that DON in the raw water was mainly composed of fractions with small molecular weight, and the average molecular weight of DON was slightly higher than that of DOC and UV254. Neutral hydrophilic components showed the highest percentage of organic nitrogen, which was obviously higher than that of DOC and UV254. Protein-like organics, amino compounds and aromatic compounds were the main contributions to DON in the raw water. Moreover, DON also consisted of nitrogen-hydrogen compounds, fatty hydrocarbon compounds, saturated hydrocarbons and so on.
出处
《中国给水排水》
CAS
CSCD
北大核心
2013年第1期1-5,共5页
China Water & Wastewater
基金
国家自然科学基金资助项目(51078280)
上海市青年科技启明星计划项目(11QA1407000)
国家水体污染控制与治理科技重大专项(2012ZX07404-004)
关键词
溶解性有机氮
分子质量分布
亲
疏水性分布
核磁共振
三维荧光光谱
红外光谱
dissolved organic nitrogen
molecular weight distribution
hydrophilic/hydropho-bic distribution
nuclear magnetic resonance
3D fluorescence spectrum
infrared spectroscopy
