Removal of fluorescence and ultraviolet absorbance of dissolved organic matter in reclaimed water by solar light

作     者：Qianyuan Wu Chao Li Wenlong Wang Tao He Hongying Hu Ye Du Ting Wang 

作者机构：Shenzhen Laboratory of Microorganism Application and risk Control Graduate School at Shenzhen Tsinghua UniversityShenzhen 518055 China Environmental Simulation and Pollution Control State Key Joint Laboratory School of Environment Tsinghua UniversityBeijing 100084 China State Environmental Protection Key Laboratory of Microorganism Application and Risk Control School of Environment Tsinghua UniversityBeijing 100084 China South China Institute of Environmental Science Ministry of Environmental Protection Guangzhou 510000 China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2016年第28卷第5期

页      面：118-127页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 0815[工学-水利工程] 

基　　金：funded by the National Science Fund of China (Nos. 51138006, 51290284) the National High-Tech R&D Program (863) of China (No. 2013AA065205) the Key Science and Technology Project of Shenzhen Water Authority The Collaborative Innovation Center for Regional Environmental Quality also supported this research 

主　　题：Wastewater reclamation Fluorescence Ultraviolet absorbance Solar light irradiation 

摘      要：Storing reclaimed water in lakes is a widely used method of accommodating changes in the consumption of reclaimed water during wastewater reclamation and reuse. Solar light serves as an important function in degrading pollutants during storage, and its effect on dissolved organic matter（DOM） was investigated in this study. Solar light significantly decreased the UV_（254） absorbance and fluorescence（FLU） intensity of reclaimed ***, its effect on the dissolved organic carbon（DOC） value of reclaimed water was very limited. The decrease in the UV_（254） absorbance intensity and FLU excitation–emission matrix regional integration volume（FLU volume） of reclaimed water during solar light irradiation was fit with pseudo-first order reaction kinetics. The decrease of UV_（254） absorbance was much slower than that of the FLU volume. Ultraviolet light in solar light had a key role in decreasing the UV_（254） absorbance and FLU intensity during solar light irradiation. The light fluence-based removal kinetic constants of the UV_（254） and FLU intensity were independent of light intensity. The peaks of the UV_（254） absorbance and FLU intensity with an apparent molecular weight（AMW） of 100 Da to 2000 Da decreased after solar irradiation, whereas the DOC value of the major peaks did not significantly change.