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Effects of acid/alkaline pretreatment and gamma-ray irradiation on extracellular polymeric substances from sewage sludge

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成果类型:
期刊论文
作者:
Xie Shuibo;Wu Yuqi;Wang Wentao;Wang Jingsong;Luo Zhiping;Li Shiyou
通讯作者:
Xie, S.
作者机构:
[Li Shiyou; Wang Wentao; Wu Yuqi; Wang Jingsong; Xie Shuibo; Luo Zhiping] Hunan Provincial Key Laboratory of Pollution Control and Resources Technology, University of South China, Hengyang 421001, China
[Xie Shuibo] Key Discipline Laboratory for National Defence for Biotechnology in Uranium Mining, Hydrometallurgy, University of South China, Hengyang 421001, China
通讯机构:
[Xie Shuibo] Univ South China, Hunan Prov Key Lab Pollut Control & Resources Tec, Hengyang 421001, Peoples R China.
Hunan Provincial Key Laboratory of Pollution Control and Resources Technology, University of South China, China
语种:
英文
关键词:
Acid/alkaline pretreatment;Extracellular polymeric substances (EPS);Gamma-ray irradiation;Sludge disintegration
期刊:
Radiation Physics and Chemistry
ISSN:
0969-806X
年:
2014
卷:
97
页码:
349-353
基金类别:
National Nature Science Foundation of China [11175081, 21177053]
机构署名:
本校为第一且通讯机构
院系归属:
土木工程学院
核资源工程学院
摘要:
In order to investigate the mechanism of extracellular polymeric substances (EPS) influencing sludge characteristics, variations of extractable EPS from municipal sewage sludge by acid/alkaline pretreatment and gamma-ray irradiation were studied. The changes in constituents of EPS were analyzed by UV-vis spectra and SEM images. The effects of alkaline pretreatment and gamma-ray irradiation on the functional groups in EPS were investigated by Fourier transform infrared (FTIR) spectrometer. Results showed that the extractable EPS increased clearly with increasing irradiation dose from 0 to 15 kGy. UV-vis spectra indicated that a new absorption band from 240 nm to 300 nm existed in all irradiated samples, apart from acid condition. The results of FTIR spectroscopic analysis indicated that, irradiation influenced major functional groups in EPS, such as protein and polysaccharide, and these effects were clearer under alkaline condition. SEM images provided that after alkaline hydrolysis, gamma-ray irradiation was more effective in resulting in the sludge flocs and cells broken, compared with acid pretreatment (pH 2.50). (c) 2013 Published by Elsevier Ltd.

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