Removal and fate of silver nanoparticles in lab-scale vertical flow constructed wetland

Bao, Shaopan; Liu, Liang; Huang, Jiaolong; Li, Zheng; Tang, Wei; Yi, Jie; Fang, Tao

doi:10.1016/j.chemosphere.2018.09.110

Cited by 22 publications

(8 citation statements)

References 41 publications

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“…Exact uptake likely depends on the type of MENP and plant species. Uptake has been observed as low as <1% [8] and as high as 60-80% [41] .…”

Section: Subsurface Transport and Fatementioning

confidence: 96%

“…Some researchers have found that plants seem to benefit from nanoparticle exposure: Yang et al (2018) [4] found that plants exposed long term to TiO2 nanoparticles had increased rates of net photosynthesis, transpiration, stomatal conductance and root activity. Other researchers reported negative effects: Bao et al (2019) [8] saw decreased root and leaf activity and decreased root film biomass in plants exposed to silver nanoparticles. Interactions between plants and MENPs seem to depend significantly on plant species and MENP type (see Table 3) [9], [10], [11] .…”

Section: Risks Of Nanoparticlesmentioning

confidence: 97%

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Impact of Titanium Dioxide Nanoparticles on Nutrient and Contaminant Reduction in Wastewater Treatment Wetlands

Hubbard¹

2019

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Table 1-List of variables Variable Description C Concentration of a constituent in water t Time u Velocity in the x-direction rxn Reactions associated with a constituent Ca Concentration of a constituent in compartment a Cb Concentration of a constituent in compartment b Ci n Concentration of a constituent in water at timestep n and node i Δt Change in time Δx Distance between two nodes No Concentration of organic nitrogen in water as nitrogen koa Reaction constant describing the transformation of organic nitrogen to ammonia fnitr Nitrification factor describing the slowing of nitrogen transformation with the decrease of dissolved oxygen in the system Na Concentration of ammonia in water as nitrogen ana Mass ratio between nitrogen and chlorophyll-a found in phytoplankton kdeath Rate constant describing phytoplankton death A Concentration of phytoplankton in water, represented by mass of chlorophyll-a in water kai Reaction constant describing the transformation of ammonia to nitrite Ni Concentration of nitrite in water as nitrogen kin Reaction constant describing the transformation of nitrite to nitrate kgrowth Rate constant describing maximum phytoplankton growth ksn Half-saturation constant for nitrogen limitation of phytoplankton growth

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“…Exact uptake likely depends on the type of MENP and plant species. Uptake has been observed as low as <1% [8] and as high as 60-80% [41] .…”

Section: Subsurface Transport and Fatementioning

confidence: 96%

Section: Risks Of Nanoparticlesmentioning

confidence: 97%

Impact of Titanium Dioxide Nanoparticles on Nutrient and Contaminant Reduction in Wastewater Treatment Wetlands

Hubbard¹

2019

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“…An experiment studied effects of design parameters of vertical flow constructed wetland on removal of silver nanoparticles (AgNPs) from wastewater, the long-term effects of nanoparticles on wetland performance, and long-term dispersal of nanoparticles (Bao et al, 2019). The results indicated that wetland plants improved removal efficiency, and it was dependent on hydraulic loading but not the bed depth.…”

Section: Nanomaterialsmentioning

confidence: 99%

Fate of environmental pollutants: A review

Aryal

Wood

Rijal

et al. 2020

Water Environment Research

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A review of the literature published in 2019 on topics associated with the fate of environmental pollutants is presented. Environmental pollutants covered include pharmaceuticals, antibiotic-resistant bacteria and genes, pesticides and veterinary medicines, personal care products and emerging pollutants, PFAS, microplastics, nanomaterials, heavy metals and radionuclides, nutrients, pathogens and indicator organisms, and oil and hydrocarbons. For each pollutant, the occurrence in the environment and/ or their fate in engineered as well as natural systems in matrices including water, soil, wastewater, stormwater, runoff, and/or manure is presented based on the published literature. The review includes current developments in understanding pollutants in natural and engineered systems, and relevant physico-chemical processes, as well as biological processes.

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“…The removal efficiency of AgNPs was between 63.2% and 93.8%. The main mechanism in the removal of AgNPs was identified as substrate adsorption although plant biomass, root activity, peroxidase activity of leaves, and biofilm biomass also altered exposure to AgNPs (Bao et al, 2019). Furthermore, another study concluded that macrophyte Cyperus alternifolius could be a better choice for immobilization of AgNPs in a CW planted with Cyperus alternifolius (Cao et al, 2019).…”

Section: Original Articlementioning

confidence: 99%

Wetlands for environmental protection

Martinez‐Guerra

Ghimire

Nandimandalam

et al. 2020

Water Environment Research

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This article presents an update on the research and practical demonstration of wetland-based treatment technologies for protecting water resources and environment covering papers published in 2019. Wetland applications in wastewater treatment, stormwater management, and removal of nutrients, metals, and emerging pollutants including pathogens are highlighted. A summary of studies focusing on the effects of vegetation, wetland design and operation strategies, and process configurations and modeling, for efficient treatment of various municipal and industrial wastewaters, is included. In addition, hybrid and innovative processes with wetlands as a platform treatment technology are presented.

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Removal and fate of silver nanoparticles in lab-scale vertical flow constructed wetland

Cited by 22 publications

References 41 publications

Impact of Titanium Dioxide Nanoparticles on Nutrient and Contaminant Reduction in Wastewater Treatment Wetlands

Impact of Titanium Dioxide Nanoparticles on Nutrient and Contaminant Reduction in Wastewater Treatment Wetlands

Fate of environmental pollutants: A review

Wetlands for environmental protection

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