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研究常规混凝及强化混凝与超滤联用处理模拟地表水,对比处理效果。利用三维荧光光谱和紫外可见光谱等研究处理过程中水体光谱特征,评价该系统对水质及后续处理的影响。结果表明,强化混凝-超滤联用系统对水体荧光强度、紫外吸收产生重要影响。能有效削弱峰值Ex/Em分别在220~230 nm/350 nm(Ⅱ区)、215 nm/400 nm(Ⅲ区)和275 nm/350 nm(Ⅳ区)的荧光,标准化分区荧光体积积分显示其对类酪氨酸、类色氨酸、类蛋白等各区荧光都有较强的削弱效果。强化混凝-超滤膜联用系统明显降低紫外吸收。混凝处理对紫外吸收的去除作用主要集中在216 nm、254 nm和280 nm等波长附近;超滤膜对紫外吸收的去除作用主要集中在216 nm和272 nm 2个波长附近,表明其对水体有机物有选择性截留能力,对消毒副产物形成能力的控制可能产生重要的影响。强化混凝-超滤系统大幅降低了微细颗粒物、有机物在超滤膜上的累积量,对膜污染控制具有明显意义。
Study the conventional coagulation and coagulation and ultrafiltration combined treatment of simulated surface water, compared with the treatment effect. The spectral characteristics of the water body during the treatment were studied by three-dimensional fluorescence spectroscopy and UV-Vis spectroscopy to evaluate the effect of the system on water quality and subsequent treatment. The results showed that the enhanced coagulation - ultrafiltration system has a significant impact on the fluorescence intensity and UV absorption of water. Which can effectively attenuate the fluorescence of peak Ex / Em at 220 ~ 230 nm / 350 nm (Ⅱ region), 215 nm / 400 nm (Ⅲ region) and 275 nm / 350 nm On tyrosine, like tryptophan, similar protein and other regions have a strong weakening of the fluorescence. Enhanced coagulation - ultrafiltration membrane system significantly reduces UV absorption. The removal of UV absorption by coagulation treatment mainly concentrated at wavelengths of 216 nm, 254 nm and 280 nm. The removal of UV absorption by ultrafiltration membranes mainly concentrated near 216 nm and 272 nm wavelengths, Selective retentivity of organic matter may have a significant impact on the control of disinfection byproduct formation. Enhanced coagulation - ultrafiltration system significantly reduces the accumulation of fine particles, organic matter in the ultrafiltration membrane, membrane pollution control has obvious significance.