期刊
CHEMOSPHERE
卷 117, 期 -, 页码 338-344出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2014.07.070
关键词
Powdered activated carbon; Dissolved organic matter; Fractionation; Excitation and emission matrix fluorescence spectroscopy; Chlorination; THMs
资金
- Key Scientific Technology Program for Environmental Protection of Shandong, China [16]
- National Major Special Technological Programmes Concerning Water Pollution Control and Management in the Twelfth Five-year Plan Period [2012ZX07203004]
Characteristics and trihalomethane (THM) formation reactivity of dissolved organic matter (DOM) in effluents from two membrane bioreactors (MBRs) with and without powdered activated carbon (PAC) addition (referred to as PAC/MBR and MBR, respectively) were examined to investigate the effects of PAC addition on THM formation of MBR effluent during chlorination. PAC addition increased the specific UV absorbance. Hydrophobic DOM especially hydrophobic acids in PAC/MBR effluent (50%) were more than MBR effluent (42%). DOM with molecular weight <1 kDa constituted 12% of PAC/MBR effluent DOM, which was less than that of MBR effluent (16%). Data obtained from excitation and emission matrix fluorescence spectroscopy revealed that PAC/MBR effluent DOM contained more simple aromatic protein, but had less fulvic acid-like and soluble microbial by-product-like. PAC addition reduced the formation of bromine-containing THMs during chlorination of effluents, but increased THM formation reactivity of effluent DOM. (C) 2014 Elsevier Ltd. All rights reserved.
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