Response of wastewater biofilm to CuO nanoparticle exposure in terms of extracellular polymeric substances and microbial community structure

Miao, Lingzhan; Wang, Chao; Hou, Jun; Wang, Peifang; Ao, Yanhui; Li, Yang; Yao, Yu; Lv, Bowen; Yang, Yangyang; You, Guoxiang; Xu, Yi; Gu, Qihao

doi:10.1016/j.scitotenv.2016.11.056

Cited by 78 publications

(32 citation statements)

References 51 publications

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“…Tabrez Khan et al (2013) also observed a decrease in EPS production after exposure to CuNP at 50 g l À1 for 16 h, observing that copper had a greater influence on protein production than on polysaccharide production. Contradicting the present results, Katner et al (2018) and Miao et al (2017) found that exposure to copper was associated with an increase in EPS production by anaerobic ammonia-oxidizing bacteria and by wastewater activated sludge, respectively. Therefore, the effects of copper exposure on EPS production is non-consensual.…”

Section: Discussionsupporting

confidence: 69%

Influence of surface copper content onStenotrophomonas maltophiliabiofilm control using chlorine and mechanical stress

Gomes

Simões

2020

Biofouling

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This work aimed to evaluate the action of materials with different copper content (0, 57, 96 and 100%) on biofilm formation and control by chlorination and mechanical stress. Stenotrophomonas maltophilia isolated from drinking water was used as a model microorganism and biofilms were developed in a rotating cylinder reactor using realism-based shear stress conditions. Biofilms were characterized phenotypically and exposed to three control strategies: 10 mg l À1 of free chlorine for 10 min, an increased shear stress (a fluid velocity of 1.5 m s À1 for 30s), and a combination of both treatments. These shock treatments were not effective in biofilm control. The benefits from the use of copper surfaces was found essentially in reducing the numbers of non-damaged cells. Copper materials demonstrated better performance in biofilm prevention than chlorine. In general, copper alloys may have a positive public health impact by reducing the number of non-damaged cells in the water delivered after chlorine exposure.

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Section: Discussionsupporting

confidence: 69%

Influence of surface copper content onStenotrophomonas maltophiliabiofilm control using chlorine and mechanical stress

Gomes

Simões

2020

Biofouling

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“…[79] ENMs may also inflict harm onto bacterial activity and their morphological structures, including processes such as EPS secretion and biofilm development (Figure 4). [128][129][130][131] To demonstrate interactions between ENMs and bacterial communities, EPS was removed from E. coli suspensions, and the toxicity of ZnO and SiO 2 NPs to E. coli was found to increase, indicating that the EPS matrix was critical to entrap NPs and prevent their contact with bacteria, enabling bacterial protection. [76] TiO 2 NP treatment was able to increase bacterial diversity and alter the physiological activity and ecological function of periphytic biofilms.…”

Section: Bacteriamentioning

confidence: 99%

The Crucial Role of Environmental Coronas in Determining the Biological Effects of Engineered Nanomaterials

Wang

et al. 2020

Small

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In aquatic environments, a large number of ecological macromolecules (e.g., natural organic matter (NOM), extracellular polymeric substances (EPS), and proteins) can adsorb onto the surface of engineered nanomaterials (ENMs) to form a unique environmental corona. The presence of environmental corona as an eco–nano interface can significantly alter the bioavailability, biocompatibility, and toxicity of pristine ENMs to aquatic organisms. However, as an emerging field, research on the impact of the environmental corona on the fate and behavior of ENMs in aquatic environments is still in its infancy. To promote a deeper understanding of its importance in driving or moderating ENM toxicity, this study systemically recapitulates the literature of representative types of macromolecules that are adsorbed onto ENMs; these constitute the environmental corona, including NOM, EPS, proteins, and surfactants. Next, the ecotoxicological effects of environmental corona‐coated ENMs on representative aquatic organisms at different trophic levels are discussed in comparison to pristine ENMs, based on the reported studies. According to this analysis, molecular mechanisms triggered by pristine and environmental corona‐coated ENMs are compared, including membrane adhesion, membrane damage, cellular internalization, oxidative stress, immunotoxicity, genotoxicity, and reproductive toxicity. Finally, current knowledge gaps and challenges in this field are discussed from the ecotoxicology perspective.

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“…The high‐quality sequences were assigned operational taxonomic units (OTUs) with 97% similarity (Liu, Wang, et al., 2018; Yin et al., 2019) using USEARCH (version 10). The OTUs were aligned with the Silva128 16S rRNA database using the Ribosomal Database Project (RDP) classifier (version 2.2) under the confidence threshold of 70% (Miao et al., 2017). Different taxonomic groups were classified using quantitative insights into microbial ecology (QIIME) package (version 1.2.1).…”

Section: Methodsmentioning

confidence: 99%

Response of soil bacterial community and geochemical parameters to cyclic groundwater‐level oscillations in laboratory columns

Xia

Cheng

Zhu

et al. 2020

Vadose Zone Journal

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Groundwater-level oscillations change geochemical conditions, C cycling processes, and bacterial community composition, and these changes may vary vertically with depth in a soil. In this study, soil column experiments were conducted to explore variations in soil bacterial community composition and its associated geochemical parameters to rapid short-term cyclic groundwater-level oscillations driven by natural fluctuations (NF) and rainfall infiltration (RI), and the results are compared with a quasistatic (QS) column. Water saturation patterns in vadose and oscillated zones, and O 2 level patterns, soil total organic C (TOC) removal rates, and soil bacterial community composition in vadose, oscillated, and saturated zones were evaluated. Results showed that water saturation and O 2 level oscillated with groundwater level in NF and RI columns. Total organic C removal rates in RI column were the highest across vadose (∼38.4%), oscillated (∼35.8%), and saturated (∼35.2%) zones. Deltaproteobacteria, which were significantly correlated with TOC removal (p < .05), were found in higher abundance in the vadose and oscillated zones of the RI column than in the QS and NF columns. Soil bacterial community structure was dynamic at the class level due to water saturation, O 2 level, and TOC removal. Total organic C removal was the driver to separate the distribution of bacterial community structure in the vadose and oscillated zones of the RI column from those of the QS and NF columns. This study suggests that RI induced rapid, short-term, cyclic, groundwater-level oscillations could significantly influence both the soil C cycle and bacterial community structure in the vadose and oscillated zones.

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Response of wastewater biofilm to CuO nanoparticle exposure in terms of extracellular polymeric substances and microbial community structure

Cited by 78 publications

References 51 publications

Influence of surface copper content onStenotrophomonas maltophiliabiofilm control using chlorine and mechanical stress

Influence of surface copper content onStenotrophomonas maltophiliabiofilm control using chlorine and mechanical stress

The Crucial Role of Environmental Coronas in Determining the Biological Effects of Engineered Nanomaterials

Response of soil bacterial community and geochemical parameters to cyclic groundwater‐level oscillations in laboratory columns

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