Removal of silver nanoparticles in simulated wastewater treatment processes and its impact on COD and NH4 reduction

Hou, Lijun; Li, Kaiyang; Ding, Yuanzhao; Li, Yan; Chen, Jian; Wu, Xiao‐Lei; Li, Xiqing

doi:10.1016/j.chemosphere.2011.12.042

Cited by 135 publications

(61 citation statements)

References 26 publications

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“…Here it has been shown that 92% to 99% of the inlet concentration of silver was removed by the STP. Other experiments showed that independent of the AgNP properties (size and coating), particles absorb to the sludge by around 90% [23,24], which we also observed.…”

Section: Fate and Behaviour Of Nm-300k In A Stpsupporting

confidence: 70%

Hazard assessment of a silver nanoparticle in soil applied via sewage sludge

Schlich

Klawonn

Terytze³

et al. 2013

Environ Sci Eur

107

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Background: Silver nanoparticles (AgNPs) are widely used in many fields of application and consumer products due to their antibacterial properties. The aim of this study was to prepare a hazard assessment for one specific AgNP in soil, incorporated via sewage sludge (the sewage sludge pathway). The effects of pristine AgNPs on microorganisms, plants and earthworms were first determined in screening tests. Long-term tests over 140 days were then conducted with AgNPs added to soil via sewage sludge. AgNPs were incorporated into the sludge through a simulated sewage treatment plant (STP) over 10 days to allow transformation to occur and also by manual spiking over 2 h. The results of the most sensitive organism from the long-term tests, the soil microorganisms, are presented.

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Section: Fate and Behaviour Of Nm-300k In A Stpsupporting

confidence: 70%

Hazard assessment of a silver nanoparticle in soil applied via sewage sludge

Schlich

Klawonn

Terytze³

et al. 2013

Environ Sci Eur

107

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“…some types of NPs such as TiO 2 , ZnO, CeO 2 , and Ag could decrease the population of the microbial community and disturb the microbial diversity in activated sludge systems (García et al, 2012;Zheng et al, 2011). Most of the studies so far have focused on the effect of NPs on the microbial growth activity (Choi et al, 2008;Liang et al, 2010;Zhang et al, 2014), change in the bacterial community structure (Sun et al, 2013;Yang et al, 2014), and decrease in the chemical oxygen demand (COD) and nitrogen/ phosphorus contents (Hou et al, 2012;Li et al, 2013). However, the effect of NPs on the physicochemical stability of activated sludge has been seldom reported .…”

Section: Introductionmentioning

confidence: 99%

Effect of CuO nanoparticles on the production and composition of extracellular polymeric substances and physicochemical stability of activated sludge flocs

Hou

Miao

Wang

et al. 2015

Bioresource Technology

140

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“…It is thus essential to understand clearly the different mechanisms that can be involved in the fate of Ag NPs in the environment, in order to establish a regulation to minimize their environmental impact [117], and to design processes that could be used for the depollution of heavily contaminated effluents [118]. Notably, research is still ongoing to determine whether Ag NPs have a significant impact when they reach wastewater treatment plants [119][120][121], or if chemical changes (and notably sulfidation) [122,123] inactivate them.…”

Section: Fate Of Silver Nanoparticles In the Environmentmentioning

confidence: 99%

Antibacterial activity of silver nanoparticles: A surface science insight

2015

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Summary Silver nanoparticles constitute a very promising approach for the development of new antimicrobial systems. Nanoparticulate objects can bring significant improvements in the antibacterial activity of this element, through specific effect such as an adsorption at bacterial surfaces. However, the mechanism of action is essentially driven by the oxidative dissolution of the nanoparticles, as indicated by recent direct observations. The role of Ag + release in the action mechanism was also indirectly observed in numerous studies, and explains the sensitivity of the antimicrobial activity to the presence of some chemical species, notably halides and sulfides which form insoluble salts with Ag + . As such, surface properties of Ag nanoparticles have a crucial impact on their potency, as they influence both physical (aggregation, affinity for bacterial membrane, etc.) and chemical (dissolution, passivation, etc.) phenomena. Here, we review the main parameters that will affect the surface state of Ag NPs and their influence on antimicrobial efficacy. We also provide an analysis of several works on Ag NPs activity, observed through the scope of an oxidative Ag + release.

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Removal of silver nanoparticles in simulated wastewater treatment processes and its impact on COD and NH4 reduction

Cited by 135 publications

References 26 publications

Hazard assessment of a silver nanoparticle in soil applied via sewage sludge

Hazard assessment of a silver nanoparticle in soil applied via sewage sludge

Effect of CuO nanoparticles on the production and composition of extracellular polymeric substances and physicochemical stability of activated sludge flocs

Antibacterial activity of silver nanoparticles: A surface science insight

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