Fluorescence spectroscopic studies of the effect of granular activated carbon adsorption on structural properties of dissolved organic matter fractions
查看参考文献36篇
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文摘
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This work investigated the effect of granular activated carbon adsorption (GACA) on fluorescence characteristics of dissolved organic matter (DOM) in secondary effluent, by means of excitation-emission matrix (EEM) spectra, the fluorescence regional integration (FRI) method, synchronous spectra, the fluorescence index defined as the ratio of fluorescence emission intensity at wavelength 450 nm to that at 500 nm at excitation (λ_(ex))=370nm, and the wavelength that corresponds to the position of the normalized emission band at its half intensity (λ_(0.5)). DOM in the secondary effluent from the North Wastewater Treatment Plant (Shenyang, China) was fractionated using XAD resins into 5 fractions: hydrophobic acid (HPO-A), hydrophobic neutral (HPO-N),transphilic acid (TPI-A), transphilic neutral (TPI-N) and hydrophilic fraction (HPI). Results showed that fluorescent materials in HPO-N and TPI-N were less readily removed than those in the other fractions by GACA. The relative content of fluorescent materials in HPO-A, TPI-A and HPI decreased whereas that in HPO-N and TPI-N increased as a consequence of GACA. Polycyclic aromatics in all DOM fractions were preferentially absorbed by GACA, in comparison with bulk DOM expressed as DOC. On the other hand, the adsorption of aromatic amino acids and humic acid-like fluorophores exhibiting fluorescence peaks in synchronous spectra by GACA seemed to be dependent on the acid/neutral properties of DOM fractions. All five fractions had decreased fluorescence indices as a result of GACA. GACA led to a decreased λ_(0.5) value for HPO-A, increased λ_(0.5) values for HPO-N, TPI-A and HPI, and a consistent λ_(0.5) value for TPI-N. |
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来源
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Frontiers of Environmental Science & Engineering
,2012,6(6):784-796 【核心库】
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DOI
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10.1007/s11783-012-0436-5
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关键词
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granular activated carbon adsorption
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dissolved organic matter
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fractionation
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fluorescence
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地址
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1.
School of Environmental Science, Liaoning University, Key Laboratory of Water Environment Biomonitoring and Ecological Security Liaoning Province, Shenyang, 110036
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School of Municipal & Environmental Engineering, Harbin Institute of Technology, Harbin, 150090
3.
Jilin Architectural and Civil Engineering Institute, Key Laboratory of Songliao Aquatic Environment, Ministry of Education, Changchun, 130118
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语种
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英文 |
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ISSN
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2095-2201 |
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学科
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环境污染及其防治 |
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基金
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国家自然科学基金
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The Science and Technology Research Program of Commission of Education of Liaoning Province
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The Planned Science and Technology Project of Liaoning Province
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文献收藏号
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CSCD:4694604
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参考文献 共
36
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