Environmentally friendly approach for advanced treatment of municipal secondary effluent by integration of micro-nano bubbles and photocatalysis
Environmentally friendly approach for advanced treatment of municipal secondary effluent by integration of micro-nano bubbles and photocatalysis
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微纳气泡与光催化一体化深度处理城市二级污水的环保方法
DOI：
10.1016/j.jclepro.2019.117828
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发表时间：
2019-11-10
影响因子：
11.1
通讯作者：
Wang, Xianze
中科院分区：
文献类型：
--
作者：
Fan, Wei;Zhou, Zhao;Wang, Xianze
城市二级出水中存在大量的有机污染物，由于其持久性和对环境的不良影响而受到广泛关注。在这项研究中，微纳米气泡（MNB）和UV/二氧化钛（TiO 2）系统，单独和组合，进行了研究，用于深度处理的SE。MNB和SBR系统的集成显着提高了化学需氧量（COD）和持久性有机污染物的去除率分别为27.52%和14.38%。根据激发-发射矩阵（EEM）光谱，混合系统有效地减少了所有五类有机污染物，而分子量（MW）分数降低，并且MW在波长254 nm（UV 254）处的UV吸光度（
Numerous organic contaminants existing in the municipal secondary effluent (SE) have gained considerable attention because of their persistent nature and adverse environmental effects. In this study, micro-nano bubbles (MNB) and UV/Titanium dioxide (TiO2) system, both individual and in combination, were investigated for advanced treatment of the SE. The integrated MNB and photocatalysis system significantly improved the removal of chemical oxygen demand (COD) and persistent organic pollutants by 27.52 and 14.38%, respectively. The hybrid system efficiently decreased all five categories of organic contaminants according to excitation-emission matrix (EEM) spectrum, while the molecular weight (MW) fractions were decreased and the UV-absorbance at wavelength 254 nm (UV254) of MW (