Exploring controls on the fate of PVP-capped silver nanoparticles in primary wastewater treatment

King, Stephen M.; Jarvie, Helen P.; Bowes, Michael J.; Gozzard, E.; Lawlor, Alan; Lawrence, M. Jayne

doi:10.1039/c4en00151f

Cited by 9 publications

(6 citation statements)

References 58 publications

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“…For this reason, water pollution control is presently one of the major scientic research areas. 1,2 Pollutants found in textile effluents include synthetic dyes and heavy metals such as copper, chromium, and cobalt (found in metal complex dyes) which are used for dye xation in wool dyeing, as reducing agents and dye bath additives in sulphate salts. 3 Dyes are difficult to be decolorized due to their complex structure, synthetic origin and recalcitrant nature.…”

Section: Introductionmentioning

confidence: 99%

Removal of a reactive dye and hexavalent chromium by a reusable bacteria attached electrospun nanofibrous web

et al. 2015

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A contaminant resistant Lysinibacillus sp. NOSK was isolated from a soil sample and its Reactive Black 5 (RB5) and Cr(VI) removal efficiencies were investigated as a function of changes in the initial pH values, temperature, static/shaking conditions, reactive dye and Cr(VI) concentrations. In this study, an electrospun polysulfone nanofibrous web (PSU-NFW) was found to be effective in attachment of bacterial cells. Bacteria attached PSU-NFWs (bacteria/PSU-NFW) have shown highly efficient removal of RB5, as 99.7 AE 0.9% and 35.8 AE 0.4% for the pristine PSU-NFW. Moreover, the highest Cr(VI) removal efficiencies measured were 98.2 AE 0.6% for bacteria attached PSU-NFW and 32.6 AE 0.6% for the pristine PSU-NFW. Simultaneous removal of RB5 and Cr(VI) were also investigated. Reusability test results indicate that, bacteria/PSU-NFW can be reused for at least 7 cycles with 28.1 AE 0.6% and 66.7 AE 0.8% removal efficiencies for RB5 and Cr(VI), respectively.

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Section: Introductionmentioning

confidence: 99%

Removal of a reactive dye and hexavalent chromium by a reusable bacteria attached electrospun nanofibrous web

et al. 2015

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“…Metal nanoparticles (NPs) have been widely applied in diverse fields, such as electronics, energy, cosmetics, , and medicine. , Among them, silver NPs (AgNPs) , have become the most commonly used, for example, in antimicrobial materials, conductive inks, , catalysts, , and flexible touch screens. However, because of the rapid growth in commercial industry and the lack of appropriate disposal protocols and treatments, AgNPs pose a daunting threat to the global environment . Exposure to AgNPs in vivo also raises concerns about biological safety.…”

Section: Introductionmentioning

confidence: 99%

“…However, because of the rapid growth in commercial industry and the lack of appropriate disposal protocols and treatments, AgNPs pose a daunting threat to the global environment. 14 Exposure to AgNPs in vivo also raises concerns about biological safety. It has been clarified that the toxicity of AgNPs originates from their degradation in lysosome with the release of Ag + ions, which can induce the formation of reactive oxygen species, trigger oxidation stress, damage DNA, and cause apoptosis of cells.…”

Section: ■ Introductionmentioning

confidence: 99%

High-Level Extraction of Recyclable Nanocatalysts by Using Polyphosphazene Microparticles

et al. 2019

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Improper disposal of metal nanoparticles has caused serious environmental and pathological problems because of their active nanotoxicity. Therefore, there is an urgent need to develop a strategy for efficiently removing redundant metal nanoparticles from water, while also permitting restoration of their catalytic activities to those of pristine particles for reapplication. Herein, we present intrinsically nitrogen-rich cross-linked polyphosphazene microparticles to capture silver nanoparticles (AgNPs) from aqueous media by a simple one-step method. The described microparticles exhibit an outstanding adsorption capacity for AgNPs of approximately 59.35 mg/g, exceeding those of other adsorbents. The adsorption kinetics of AgNPs on these microparticles obeyed a pseudo-second-order kinetic model. More importantly, the recovered AgNPs maintained good catalytic activity in the reduction of methylene blue by sodium borohydride. Based on their simple preparation, high adsorption efficiency, and nondestructive effect on the catalytic activity of the recovered AgNPs, the described polyphosphazene microparticles display promising potential for the removal and recovery of AgNPs from water.

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“…One study has shown that only less than 3% of silver nanoparticles spiked into the influent remain in the overflow of the primary clarifier that enters the aeration basin in a pilot-scale WRRF (Impellitteri et al 2013). Another research study has also indicated that primary wastewater treatment or sedimentation removes most silver nanoparticles (approximately 90%) to primary sludge, preventing them from moving to the secondary treatment stage (King et al 2015). In contrast, primary clarification only removed a small portion (approximately 10%) of silver nanoparticles in a lab-scale wastewater treatment utility .…”

Section: Introductionmentioning

confidence: 99%

“…62or lower, silver nanoparticles do not pose significant risks to wastewater microorganisms in full-scale WRRFs(King et al 2015).Reactor configuration, microbial functional redundancy, and microbial adaptability to silver nanoparticles are three main reasons for the proposed negligible effects of silver nanoparticles on wastewater microorganisms in full-scale WRRFs. A full-scale WRRF is connected to a sewage collection system, which steadily converts silver nanoparticles to…”

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confidence: 99%

Governing factors affecting the impacts of silver nanoparticles on wastewater treatment

Zhang

et al. 2016

Science of The Total Environment

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Silver nanoparticles (nanosilver or AgNPs) enter municipal wastewater from various sources, raising concerns about their potential adverse effects on wastewater treatment processes. We argue that the biological effects of silver nanoparticles at environmentally realistic concentrations (μgL or lower) on the performance of a full-scale municipal water resource recovery facility (WRRF) are minimal. Reactor configuration is a critical factor that reduces or even mutes the toxicity of silver nanoparticles towards wastewater microbes in a full-scale WRRF. Municipal sewage collection networks transform silver nanoparticles into silver(I)-complexes/precipitates with low ecotoxicity, and preliminary/primary treatment processes in front of biological treatment utilities partially remove silver nanoparticles to sludge. Microbial functional redundancy and microbial adaptability to silver nanoparticles also greatly alleviate the adverse effects of silver nanoparticles on the performance of a full-scale WRRF. Silver nanoparticles in a lab-scale bioreactor without a sewage collection system and/or a preliminary/primary treatment process, in contrast to being in a full scale system, may deteriorate the reactor performance at relatively high concentrations (e.g., mgL levels or higher). However, in many cases, silver nanoparticles have minimal impacts on lab-scale bioreactors, such as sequencing batch bioreactors (SBRs), especially when at relatively low concentrations (e.g., less than 1mgL). The susceptibility of wastewater microbes to silver nanoparticles is species-specific. In general, silver nanoparticles have higher toxicity towards nitrifying bacteria than heterotrophic bacteria.

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Exploring controls on the fate of PVP-capped silver nanoparticles in primary wastewater treatment

Abstract: What controls the fate of silver nanoparticles in primary wastewater treatment?

Cited by 9 publications

References 58 publications

Removal of a reactive dye and hexavalent chromium by a reusable bacteria attached electrospun nanofibrous web

Removal of a reactive dye and hexavalent chromium by a reusable bacteria attached electrospun nanofibrous web

High-Level Extraction of Recyclable Nanocatalysts by Using Polyphosphazene Microparticles

Governing factors affecting the impacts of silver nanoparticles on wastewater treatment

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