刘超超, 韩芸, 卓杨, 白洋, 彭党聪. 城市污水厂剩余污泥中腐殖酸化学组成与结构特征[J]. 环境化学, 2017, 36(8): 1735-1743
LIU Chaochao, HAN Yun, ZHUO Yang, BAI Yang, PENG Dangcong. Chemical composition and structural characteristics of humic acid extracted from excess sludge in municipal wastewater treatment plants[J]. Environmental Chemistry, 2017, 36(8): 1735-1743

刘超超, 韩芸, 卓杨, 白洋, 彭党聪
西安建筑科技大学环境与市政工程学院, 西安, 710055
关键词:    剩余污泥    腐殖酸    元素分析    红外光谱    13C核磁共振    三维荧光光谱    城市污水厂   
Chemical composition and structural characteristics of humic acid extracted from excess sludge in municipal wastewater treatment plants
LIU Chaochao, HAN Yun, ZHUO Yang, BAI Yang, PENG Dangcong
School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, 710055, China
Chemical composition and structures of humic acids (HAs) in the excess sludge from different municipal wastewater treatment plants (WWTP) were determined by using elemental analysis, Fourier transformed infrared (FT-IR) spectroscopy, solid-state CP TOSS MAS 13C nuclear magnetic resonance (13C-NMR) spectroscopy and three dimensional fluorescence excitation-emission-matrix (3DEEM) spectroscopy. The results showed that the HAs presented almost the same chemical composition. However, the structures of the HAs were significantly different. The results of elemental analysis showed different HAs had different H/C, O/C, and C/N atomic ratios, which indicated that HAs had different structures. The 3DEEM spectra of all HAs samples presented two characteristic peaks. The fluorescence index showed that all HAs were generated from the biological source, which was consistent with the H/C results of elemental analysis. The results of FT-IR spectra of HAs from plant A showed the maximum absorption peaks for the various functional groups of humic acid. This indicated that the HAs of plant A had the highest content of functional group. While, the HA of plant C contained the least content of oxygen containing functional groups. The results of 13C-NMR indicated that the HA of plant A had the highest content of carbon and aromatic carbon structure compounds, while plant D contained the least content of such structure compounds.
Key words:    excess sludge    humic acids    elemental analysis    fourier transform infrared    13C-NMR    3DEEM    municipal wastewater treatment plant   
收稿日期: 2016-12-29
基金项目: 国家自然科学基金(51408458),国家水体污染控制与治理科技重大专项(2013ZX07315-001-04),陕西省科技统筹创新工程计划项目(2016KTZDSF04-02-02)和陕西省自然科学基金(2017JM5090)资助.
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