Response of aerobic granular sludge to the long-term presence to nanosilver in sequencing batch reactors: Reactor performance, sludge property, microbial activity and community

Quan, Xiangchun; Yan, Cen; Fang, Lu; Gu, Lingyun; Ma, Jingyun

doi:10.1016/j.scitotenv.2014.11.015

Cited by 47 publications

(11 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…77 Many microcosm and mesocosm studies have observed impacts of ENMs on microbial communities, 42,43,45,92 while others have not. 39,40,93 In agreement with previous work, 32,94 we observed distinct impacts of Ag 0 and Ag 2 S NPs on microbial communities and found Cu 2+ to have greater impacts on microbial communities than CuO NPs. However, where we observed highly similar impacts of CuO and CuS NPs, previous work with a eukaryotic organism found CuO and CuS NPs to have differential impacts.…”

Section: Environmental Science and Technologysupporting

confidence: 92%

Impacts of Pristine and Transformed Ag and Cu Engineered Nanomaterials on Surficial Sediment Microbial Communities Appear Short-Lived

Moore

Stegemeier

Bibby

et al. 2016

Environ. Sci. Technol.

View full text Add to dashboard Cite

Laboratory-based studies have shown that many soluble metal and metal oxide engineered nanomaterials (ENM) exert strong toxic effects on microorganisms. However, laboratory-based studies lack the complexity of natural systems and often use "as manufactured" ENMs rather than more environmentally relevant transformed ENMs, leaving open the question of whether natural ligands and seasonal variation will mitigate ENM impacts. Because ENMs will accumulate in subaquatic sediments, we examined the effects of pristine and transformed Ag and Cu ENMs on surficial sediment microbial communities in simulated freshwater wetlands. Five identical mesocosms were dosed through the water column with either Ag(0), Ag2S, CuO or CuS ENMs (nominal sizes of 4.67 ± 1.4, 18.1 ± 3.2, 31.1 ± 12, and 12.4 ± 4.1, respectively) or Cu(2+). Microbial communities were examined at 0, 7, 30, 90, 180, and 300 d using qPCR and high-throughput 16S rRNA gene sequencing. Results suggest differential short-term impacts of Ag(0) and Ag2S, similarities between CuO and CuS, and differences between Cu ENMs and Cu(2+). PICRUSt-predicted metagenomes displayed differential effects of Ag treatments on photosynthesis and of Cu treatments on methane metabolism. By 300 d, all metrics pointed to reconvergence of ENM-dosed mesocosm microbial community structure and composition, suggesting that the long-term microbial community impacts from a pulse of Ag or Cu ENMs are limited.

show abstract

Section: Environmental Science and Technologysupporting

confidence: 92%

Impacts of Pristine and Transformed Ag and Cu Engineered Nanomaterials on Surficial Sediment Microbial Communities Appear Short-Lived

Moore

Stegemeier

Bibby

et al. 2016

Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…In all experiments, the concentrations of nitrite and nitrate remained stable throughout the whole operation period, even in the control bioreactor. These observations correspond to the previous AGS studies wherein CuO NPs and Ag NPs did not influence the removal efficiency of these components [5,6]. In contrast, at 25 mg/L GO NPs, NH 4 -N concentration in the effluent increased marginally after 5.5 day and was 2.39 mg/L after 7 days.…”

Section: Resultssupporting

confidence: 90%

Effect Of Graphene Oxide Nanoparticles on the Performance of Aerobic Granular Sludge Treatment System

Kedves

Rónavári

2021

APH

View full text Add to dashboard Cite

“…This finding is also supported by the results of the decreased SDH activity with the addition of selected NSAIDs. Quan et al [41] also reported that low toxicity may increase the amount of EPS content, but high toxicity may reduce it.…”

Section: Resultsmentioning

confidence: 99%

Impact of selected non-steroidal anti-inflammatory pharmaceuticals on microbial community assembly and activity in sequencing batch reactors

Jiang

Geng

et al. 2017

PLoS ONE

View full text Add to dashboard Cite

This study covers three widely detected non-steroidal anti-inflammatory pharmaceuticals (NSAIDs), diclofenac (DCF), ibuprofen (IBP) and naproxen (NPX), as NSAIDs pollutants. The objective is to evaluate the impact of NSAIDs at their environmental concentrations on microbial community assembly and activity. The exposure experiments were conducted under three conditions (5 μg L-1 DCF, 5 μg L-1 DCF+5 μg L-1 IBP and 5 μg L-1 DCF+5 μg L-1 IBP+ 5 μg L-1 NPX) in sequencing batch reactors (SBRs) for 130 days. Removals of COD and NH4+-N were not affected but total nitrogen (TN) removal decreased. IBP and NPX had the high removal efficiencies (79.96% to 85.64%), whereas DCF was more persistent (57.24% to 64.12%). In addition, the decreased removals of TN remained the same under the three conditions (p > 0.05). The results of oxidizing enzyme activities, live cell percentages and extracellular polymeric substances (EPS) indicated that NSAIDs damaged the cell walls or microorganisms and the mixtures of the three NSAIDs increased the toxicity. The increased Shannon-Wiener diversity index suggested that bacterial diversity was increased with the addition of selected NSAIDs. Bacterial ribosomal RNA small subunit (16S) gene sequencing results indicated that Actinobacteria and Bacteroidetes were enriched, while Micropruina and Nakamurella decreased with the addition of NSAIDs. The enrichment of Actinobacteria and Bacteroidetes indicated that both of them might have the ability to degrade NSAIDs and thereby could adapt well with the presence of NSAIDs.

show abstract

Response of aerobic granular sludge to the long-term presence to nanosilver in sequencing batch reactors: Reactor performance, sludge property, microbial activity and community

Cited by 47 publications

References 32 publications

Impacts of Pristine and Transformed Ag and Cu Engineered Nanomaterials on Surficial Sediment Microbial Communities Appear Short-Lived

Impacts of Pristine and Transformed Ag and Cu Engineered Nanomaterials on Surficial Sediment Microbial Communities Appear Short-Lived

Effect Of Graphene Oxide Nanoparticles on the Performance of Aerobic Granular Sludge Treatment System

Impact of selected non-steroidal anti-inflammatory pharmaceuticals on microbial community assembly and activity in sequencing batch reactors

Contact Info

Product

Resources

About