Fluorescence characteristics of dissolved organic matter in coagulation process of recycling filter backwash water

doi:10.3969/j.issn.0438-1157.2013.05.044

CIESC Journal ›› 2013, Vol. 64 ›› Issue (5): 1825-1832.DOI: 10.3969/j.issn.0438-1157.2013.05.044

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Fluorescence characteristics of dissolved organic matter in coagulation process of recycling filter backwash water

ZHOU Zhiwei, YANG Yanling, LI Xing, LIU Yongwang, SU Zhaoyang

Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China

Received:2012-08-31 Revised:2012-12-30 Online:2013-05-05 Published:2013-05-05
Supported by:
supported by the National Natural Science Foundation of China(51278005), Beijing Natural Science Foundation(8132007) and Post-Graduate Sci-Tech Innovation Foundation(ykj-2012-8728).

滤池反冲水回流混凝工艺中溶解性有机物荧光特性

周志伟, 杨艳玲, 李星, 刘永旺, 苏兆阳

北京工业大学, 北京市水质科学与水环境恢复工程重点实验室, 北京 100124

通讯作者: 杨艳玲
作者简介:周志伟(1985-),男,博士研究生。
基金资助:
国家自然科学基金项目(51278005);北京市自然科学基金项目(8132007);研究生科技创新基金(ykj-2012-8728)。

Abstract

Abstract: The impacts of recycling filter backwash water(FBWW)blended with corresponding raw water W1(simulated water)and W2('Longtan’ lake water)on specific bulk water parameters, i.e.DOC, UV₂₅₄ and specific ultraviolet absorbance(SUVA)removal were evaluated in coagulation-sedimentation processes.Fluorescence characteristics of dissolved organic matter(DOM)in source waters, FBWWs and treated water were identified and compared.As compared with control trial without FBWW, three volumetric recycling ratios at 2%, 5% and 8% were investigated.The results indicated that fluorescent components in raw water and corresponding untreated FBWWs DOM were mainly humic-like fluorophore(Peak A)and protein-like fluorophore(Peak T), with Ex/Em wavelengths at 245.0-265.0 nm/400.0-435.0 nm, 280.0-305.0 nm/305.0-345.0 nm, respectively.Additionally, a broad Peak C with relatively lower fluorescence intensity was observed in all fluorescence spectra.At observed recycling rates, organic matter removal rates in treated water were improved with FBWW1, while the enhanced removal efficiencies of DOM in treated samples with FBWW2 were unconspicuous.Fluorescence EEM spectra in the DOM of treated water samples were analogous to those of source water accordingly.The process of recycling FBWW could improve humic-like substances(Peak A)removal, but the protein-like matters were resistant to elimination or even enriched with unvaried structure.The DOM removal in the coagulation process of recycling filter backwash water could be well identified by the three-dimensional excitation emission matrix(3D-EEM)fluorescence technique, therefore it could be used in wide applications.

Key words: filter backwash water, recycling, dissolved organic matter, 3D-EEM fluorescence

关键词: 滤池反冲水, 回流, 溶解性有机物, 三维荧光

CLC Number:

TU991.2

ZHOU Zhiwei, YANG Yanling, LI Xing, LIU Yongwang, SU Zhaoyang. Fluorescence characteristics of dissolved organic matter in coagulation process of recycling filter backwash water[J]. CIESC Journal, 2013, 64(5): 1825-1832.

周志伟, 杨艳玲, 李星, 刘永旺, 苏兆阳. 滤池反冲水回流混凝工艺中溶解性有机物荧光特性[J]. 化工学报, 2013, 64(5): 1825-1832.

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Fluorescence characteristics of dissolved organic matter in coagulation process of recycling filter backwash water

滤池反冲水回流混凝工艺中溶解性有机物荧光特性

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