The effects of non-stabilised and Na-carboxymethylcellulose-stabilised iron oxide nanoparticles on remediation of Co-contaminated soils

Bidast, Solmaz; Golchin, Ahmad; Baybordi, Ahmad; Zamani, Abbasali; Naidu, Ravi

doi:10.1016/j.chemosphere.2020.128123

Cited by 20 publications

(3 citation statements)

References 52 publications

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“…Arsenic (As) is a metalloid commonly found in polluted soils and groundwaters that has high toxicity and carcinogenicity, which might increase incidences of cancer, along with other negative health effects. Moreover, the migration of arsenic in the environment further increases its environmental risks. − Abundant iron-bearing minerals in soils and sediments significantly affect the migration and fate of arsenic. , Hematite (α-Fe 2 O 3 ) is one of the most common iron oxides that is widely distributed in tropical and subtropical regions. Due to its thermodynamic stability and high reactivity, hematite extensively participates in biogeochemical processes (e.g., via adsorption, oxidation/reduction, and catalytic processes) that have attracted much attention. − However, hematite hardly exists in perfectly crystalline form in natural environments due to the incorporation of impurities (e.g., Al and Mn ions) and the dynamic changes of environmental conditions (e.g., temperature), including redox conditions (e.g., via flooding and drainage), − which allows hematite to possess different vacancy defects, thereby showing varying physical and chemical properties.…”

Section: Introductionmentioning

confidence: 99%

“…1−5 Abundant iron-bearing minerals in soils and sediments significantly affect the migration and fate of arsenic. 6,7 Hematite (α-Fe 2 O 3 ) is one of the most common iron oxides that is widely distributed in tropical and subtropical regions. Due to its thermodynamic stability and high reactivity, hematite extensively participates in biogeochemical processes (e.g., via adsorption, oxidation/reduction, and catalytic processes) that have attracted much attention.…”

Section: Introductionmentioning

confidence: 99%

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Quantitative Contribution of Oxygen Vacancy Defects to Arsenate Immobilization on Hematite

Xiang

Chen

et al. 2023

Environ. Sci. Technol.

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Hematite is a common iron oxide in natural environments, which has been observed to influence the transport and fate of arsenate by its association with hematite. Although oxygen vacancies were demonstrated to exist in hematite, their contributions to the arsenate immobilization have not been quantified. In this study, hematite samples with tunable oxygen vacancy defect (OVD) concentrations were synthesized by treating defect-free hematite using different NaBH 4 solutions. The vacancy defects were characterized by positron annihilation lifetime spectroscopy, Doppler broadening of annihilation radiation, extended X-ray absorption fine structure (EXAFS), thermogravimetric mass spectrometry (TG-MS), electron paramagnetic resonance (EPR), and X-ray photoelectron spectroscopy (XPS). The results revealed that oxygen vacancy was the primary defect type existing on the hematite surface. TG-MS combined with EPR analysis allowed quantification of OVD concentrations in hematite. Batch experiments revealed that OVDs had a positive effect on arsenate adsorption, which could be quantitatively described by a linear relationship between the OVD concentration (C def , mmol m −2 ) and the enhanced arsenate adsorption amount caused by defects (ΔQ m , μmol m −2 ) (ΔQ m = 20.94 C def , R 2 = 0.9813). NH 3diffuse reflectance infrared Fourier transform (NH 3 -DRIFT) analysis and density functional theory (DFT) calculations demonstrated that OVDs in hematite were beneficial to the improvement in adsorption strength of surface-active sites, thus considerably promoting the immobilization of arsenate.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Quantitative Contribution of Oxygen Vacancy Defects to Arsenate Immobilization on Hematite

Xiang

Chen

et al. 2023

Environ. Sci. Technol.

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“…NPs have the properties of stability, hydrophilicity, photocatalysis, nonirritant, good weatherability and shading in mechanics, heat, magnetism, optics, electricity and chemistry ( Huang et al., 2019 ; Baharlooeian and Badhul, 2020 ). They can be applied in targeted drug delivery, diagnosis, tissue engineering and environmental remediation ( Gandhimathi et al., 2019 ; Bidast et al., 2020 ; Santelli et al., 2020 ; Bajpai et al., 2022 ; Shukla et al., 2022 ).…”

Section: Introductionmentioning

confidence: 99%

Combined analysis of transcriptomics and metabolomics on the cumulative effect of nano-titanium dioxide on mulberry seedlings

Wei

et al. 2023

Front. Plant Sci.

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IntroductionTitanium dioxide nanoparticles (TiO2 NPs) are among the most widely used inorganic nanomaterials in industry, medicine and food additives. There are increasing concerns regarding their potential risks to plants and the environment. Mulberry trees are widely grown in China due to their high survival rate and ability to aid ecological recovery.MethodsHerein, the effects of TiO2 NPs with different concentrations (100, 200, 400 and 800 mg/L) on the growth and physiology of the mulberry tree were systematically evaluated in aspects of physiology, transcriptomics and metabolomics.ResultsResults showed that TiO2 NPs could be absorbed by the mulberry sapling root system and be transferred to the plant shoot. This results in the destruction of mulberry sapling root and leaf tissue. Furthermore, the number of chloroplasts and their pigment contents were reduced and the homeostasis of metal ions was disrupted. The toxic effects of TiO2 NPs attenuated the mulberry sapling’s stress resistance, the contents of malondialdehyde in 100 mg/L, 200 mg/L 400 mg/L and 800 mg/L treatment groups increased by 87.70%, 91.36%, 96.57% and 192.19% respectively compared with the control group. The transcriptomic data showed that TiO2 NPs treatment mainly affected the expression of genes related to energy synthesis and transport, protein metabolism, and response to stress. Meanwhile, the results of metabolomics showed that 42 metabolites produced significant differences in mulberry, of which 26 differential metabolites were up-regulated in expression and 16 differential metabolites were down-regulated, mainly including metabolic pathways such as secondary metabolite biosynthesis, citric acid cycle, and tricarboxylic acid cycle, and was not conducive to the seed germination and or growth of the mulberry sapling.DiscussionThis study enriches the understanding of the effects of TiO2 NPs on plants and provides a reference for the comprehensive scientific assessment of the potential risks of nanomaterials on plants.

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Past, Present and Possible Future Application of Nanoparticle in Contaminated Soil Remediation

Yadav

Sinha

Pramanik

et al. 2023

Smart Nanomaterials Technology

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The effects of non-stabilised and Na-carboxymethylcellulose-stabilised iron oxide nanoparticles on remediation of Co-contaminated soils

Cited by 20 publications

References 52 publications

Quantitative Contribution of Oxygen Vacancy Defects to Arsenate Immobilization on Hematite

Quantitative Contribution of Oxygen Vacancy Defects to Arsenate Immobilization on Hematite

Combined analysis of transcriptomics and metabolomics on the cumulative effect of nano-titanium dioxide on mulberry seedlings

Past, Present and Possible Future Application of Nanoparticle in Contaminated Soil Remediation

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