title: [Characterization of the change in DOM during municipal secondary effluent treatment with magnetic ion exchange resin by 3DEEM].
abstract: Magnetic ion exchange resin was a very good advanced treatment process to remove organic matter from municipal wastewater, and three-dimensional excitation emission matrix fluorescence spectroscopy was widely used to analyze the characterization of the change in DOM. The results showed that both two-stage treatment process and the rate variation of inflow affected the removal effects of DOC and UV254 obviously, and the removal rates were 25.5% - 53.5% and 27.6% - 52.2%. The concentrations of DOC and UV254 were 3.29 mg x L(-1) and 0.057 cm(-1) in T2 effluent respectively. The fluorescence intensities of aromatic protein and visible fulvic-like were high in municipal secondary effluent. MIEX made the fluorescence intensities of tryptophan protein, aromatic protein and humic-like fluorescence peaks decreasing 38.2%, 85.8% and 85.7% respectively from secondary effluent, and make humic-like and visible fulvic-like fluorescence peaks disappearing. The fluorescence peak of soluble microbial byproducts appeared. The negative correlations were strong between the declining rates of tryptophan-like fluorescence intensity and aromatic protein fluorescence intensity and the rates of inflow. 50 - 100 L x h(-1) flow rate influenced most for the removal rate of each DOC. The linear treatment effect was higher for tryptohan-like and aromatic protein DOM by MIEX (R2 = 0.8348), and the treatment effect was the highest for aromatic protein DOM by MIEX (alpha = 850.2). The correlation between UV fulvic-like DOM and fluorescence intensity was worse than that between DOC and fluorescence intensity.
authors.affiliation: Beijing Drainage Group Company Limited, Beijing 100124, China. yangjian@bdc.cn
authors.forename: Jian
authors.initials: J
authors.lastname: Yang
authors.forename: Jin-Hua
authors.initials: JH
authors.lastname: Gao
authors.forename: Jiang
authors.initials: J
authors.lastname: Chang
mesh_terms: D002947:Cities; D007475:Ion Exchange Resins; D008280:Magnetics; D009930:Organic Chemicals / Q000302:isolation & purification*; D013050:Spectrometry, Fluorescence / Q000379:methods; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000737:chemistry; D018508:Water Purification
chemical_list: D007475:Ion Exchange Resins; D009930:Organic Chemicals; D062065:Wastewater