Influence of CeO2 nanoparticles on viscoelastic properties of sludge: Role of extracellular polymeric substances
作者： Guoxiang You , Peifang Wang , Jun Hou , Chao Wang , Lingzhan Miao
DOI: 10.1016/J.ENVRES.2018.07.005
关键词:
摘要: Abstract Cerium oxide nanoparticles (CeO2 NPs) affected the production of extracellular polymeric substances (EPSs), and thus might bring challenges for sludge pumping mixing. In present study, we investigated rheological behavior before after extraction different EPSs fractions under various CeO2 NPs concentrations. It was found that removal loosely bound (LB-EPSs) could affect shear stress (τ) apparent viscosity (η), changes were dependent on The tightly (TB-EPSs) either with or without addition significantly decreased yield (τy) limiting (η∞). Furthermore, dynamic (strain, frequency time) sweep measurements proved storage modulus (G') TB-EPSs, indicating weakened elastic solid-like properties. fluctuated content polysaccharide in LB-EPSs increased amount protein TB-EPSs likely to contribute variation viscoelastic behaviors respectively. addition, properties also related zeta potential, particle size key organic matters (104–106 Da) stratified EPSs. These results significant take advantages treatment presence NPs.
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