Graphene Oxide Promoted Cadmium Uptake by Rice in Soil

He, Yijia; Qian, Lichao; Zhou, Ke; Hu, Ruirui; Huang, Mei‐Rong; Wang, Min; Zhao, Guoke; Liu, Yule; Xu, Zhiping; Zhu, Hongwei

doi:10.1021/acssuschemeng.8b06823

Cited by 33 publications

(23 citation statements)

References 57 publications

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“…PMF is calculated for free-energy analysis using the US method. ,,, In the study of edge effects on dehydration/rehydration, the reaction coordinate is chosen as the ion position along the x direction where x = 0 is the position of the edge-carbon atom in graphene (Figure ). The orders of magnitude of the barriers in free-energy profiles are consistent with previous studies except for minor differences arising from the choices of force-field parameters and simulation models. , We use a harmonic spring to restrain the position of the ion at a specific value of x .…”

Section: Models and Methodsmentioning

confidence: 99%

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Ion Permeability and Selectivity in Composite Nanochannels: Engineering through the End Effects

Zhou

2020

J. Phys. Chem. C

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Ion transport through nanochannels allows ultrafast permeation and highly efficient separation, becoming promising for applications in water purification, mineral separation, and biological sensing. Spatial confinement down to the nanometer scale allows one to separate ions by their size, which, however, fails for ions with similar diameters of hydration. This selectivity can be boosted by enhancing the confinement to be comparable with or even lower than the size of hydrated ions, forcing the hydration shells to be distorted, even destroyed, or tuning the ion–wall interaction. We perform molecular simulations to explore ion transport processes across graphene nanochannels by exploring the end effects where both nanoconfinement and chemical functionalization are involved. We calculated the free-energy profiles that include the hopping barriers for dehydration/rehydration and adsorption/desorption of ions at the ends as well as the diffusivity of ions inside the nanochannel. A composite-channel model is then constructed for realistic membranes. The model and related parameters reported here allow us to quantitatively analyze the performance of nanochannel-embedded materials or devices, which conclude that, beyond subnanometer confinement that may be technically challenging for large-scale applications, edge engineering of the nanochannels by functional groups can significantly enhance the hopping-specific selectivity even if the diffusion-specific selectivity is gentle.

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Section: Models and Methodsmentioning

confidence: 99%

“…Similarly, there is a free-energy barrier (ΔG des ) for dissociation and possible rehydration. The amplitudes of these barriers depend on the type and density of functional groups (Figure3) 28,33. The absorption barrier is calculated by referring to the configuration where the 2HS of ions is attached to the end (Figure3d).…”

mentioning

confidence: 99%

Ion Permeability and Selectivity in Composite Nanochannels: Engineering through the End Effects

Zhou

2020

J. Phys. Chem. C

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“…Graphene oxide, which has prospective applications in improving soil health and crop yield, can have an indirect effect on crops and has shown to promote cadmium uptake in rice (He, Qian, et al, 2019).…”

Section: Engineered Nanomaterialsmentioning

confidence: 99%

Detection, occurrence, and fate of emerging contaminants in agricultural environments (2020)

Snow

Cassada

Biswas

et al. 2020

Water Environment Research

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A review of 79 papers published in 2019 is presented. The topics ranged from detailed descriptions of analytical methods, to fate and occurrence studies, to ecological effects and sampling techniques for a wide variety of emerging contaminants likely to occur in agricultural environments. New methods and studies on veterinary pharmaceuticals, antibiotics, anthelmintics, and engineered nanomaterials in agricultural environments continue to expand our knowledge base on the occurrence and potential impacts of these compounds. This review is divided into the following sections: Introduction, Analytical Methods, Antibiotics in Agroecosystems, Pharmaceutical Fate and Occurrence, Anthelmintics and Engineered Nanomaterials.

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“…Reduced graphene induced cytotoxicity and inhibits photosynthetic performance of the green alga [25]. Graphene also induced cell death in Arabidopsis thaliana [26,27], cadmium uptake, growth inhibition photosynthesis inhibition, and nutritional disorder in wheat seedlings [28,29], cadmium uptake, pH alteration, iron overload and oxidative damage in rice [30,31], roots growth inhibition and oxidative stress in apple [32].…”

Section: Introductionmentioning

confidence: 99%

Transcriptome analysis reveals that multiple metabolic pathways operate in Zea mays roots subjected to graphene

Chen¹,

Zhao²,

Song³

et al. 2020

Preprint

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Background: To explore the effects and molecular mechanism of graphene on the growth and development of Zea mays L., the seeds were randomly divided into the control and experimental groups in this study, the roots of Zea mays L. seedlings were watered by different concentrations (0~100 mg/L) graphene. Results: By evaluating the root growth indices of maize, 50 mg/L graphene increased significantly the total root length, root volume, the number of root tips and root forks of maize seedlings compared with the control group. The contents of nitrogen and potassium in the soil around the roots were elevated after the treatment of 50 mg/L graphene. Then, we compared the transcriptome changes of Zea mays roots in response to 50 mg/L graphene treatment. Transcriptional factor regulation, plant hormone signal transduction, nitrogen and potassium metabolism as well as secondary metabolism in maize roots subjected to graphene showed significant up-regulated expressions, all of which might be related to mechanisms underlying graphene response. Based on qPCR validations, we proposed several candidate genes that might be responded to the graphene treatment in maize roots. Conclusion: The transcriptional profiles presented here provide a foundation for deciphering the mechanism between the graphene and maize roots interaction.

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Graphene Oxide Promoted Cadmium Uptake by Rice in Soil

Cited by 33 publications

References 57 publications

Ion Permeability and Selectivity in Composite Nanochannels: Engineering through the End Effects

Ion Permeability and Selectivity in Composite Nanochannels: Engineering through the End Effects

Detection, occurrence, and fate of emerging contaminants in agricultural environments (2020)

Transcriptome analysis reveals that multiple metabolic pathways operate in Zea mays roots subjected to graphene

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