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环境化学  2015 

三维荧光光谱结合化学分析评价胞外多聚物的提取方法

Keywords: 胞外多聚物,三维荧光光谱,提取,污泥

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Abstract:

采用高速离心法、EDTA法、阳离子交换树脂法(CER)、甲醛法和甲醛+NaOH法提取普通活性污泥和好氧颗粒污泥的胞外多聚物(EPS),结合三维荧光光谱对五种方法进行评价,并对EPS中的成分进行分析.结果表明,5个EPS的三维荧光光谱峰值中,2个是类蛋白峰,2个是类富里酸峰,1个是类腐殖酸峰.匀浆对好氧颗粒污泥EPS的提取必不可少.甲醛严重干扰核酸的化学测定.透析前后的EPS提取液均应作为分析对象.单纯高速离心法无法有效提取EPS.CER法不容易造成细胞破壁,是一种比较有效的方法.虽然甲醛+NaOH法对EPS的提取量最大,但对细胞的破壁程度也最大.EDTA会导致溶胞,并严重污染EPS.甲醛+NaOH法和EDTA法都会严重干扰胞外蛋白的三维荧光光谱分析.

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