Emerging role of graphene oxide as sorbent for pesticides adsorption: Experimental observations analyzed by molecular modeling

Wang, Hanxun; Hu, Baichun; Gao, Zisen; Zhang, Fengjiao; Wang, Jian

doi:10.1016/j.jmst.2020.02.033

Cited by 38 publications

(11 citation statements)

References 29 publications

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“…Shankar et al [34] removed pentachlorophenol pesticides from water by using chitosan as adsorbent. The removal of several pesticides from drinking water sources using activated carbon as adsorbent has also been reported by Biela et al Different organochlorine pesticides have been removed from waste water using zeolite adsorbent [50] and the use of graphene oxide to adsorb pesticides from environmental samples have been reported [51].…”

Section: Methods For Removal Of Organochlorine Pesticides From the Environmentmentioning

confidence: 69%

Recent Strategies for Environmental Remediation of Organochlorine Pesticides

2020

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The amount of organochlorine pesticides in soil and water continues to increase; their presence has surpassed maximum acceptable concentrations. Thus, the development of different removal strategies has stimulated a new research drive in environmental remediation. Different techniques such as adsorption, bioremediation, phytoremediation and ozonation have been explored. These techniques aim at either degrading or removal of the organochlorine pesticides from the environment but have different drawbacks. Heterogeneous photocatalysis is a relatively new technique that has become popular due to its ability to completely degrade different toxic pollutants—instead of transferring them from one medium to another. The process is driven by a renewable energy source, and semiconductor nanomaterials are used to construct the light energy harvesting assemblies due to their rich surface states, large surface areas and different morphologies compared to their corresponding bulk materials. These make it a green alternative that is cost-effective for organochlorine pesticides degradation. This has also opened up new ways to utilize semiconductors and solar energy for environmental remediation. Herein, the focus of this review is on environmental remediation of organochlorine pesticides, the different techniques of their removal from the environment, the advantages and disadvantages of the different techniques and the use of specific semiconductors as photocatalysts.

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Section: Methods For Removal Of Organochlorine Pesticides From the Environmentmentioning

confidence: 69%

Recent Strategies for Environmental Remediation of Organochlorine Pesticides

2020

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“…van der Waals interactions are relatively weak compared to a chemical bond or a hydrogen bond . As reported by Wang et al, the size and conformational evolution of the herbicide molecule play an important role for its van der Waals interaction with a graphene oxide sheet. As shown in Table S1, chloridazon obviously has greater steric hindrance than its metabolites.…”

Section: Resultsmentioning

confidence: 97%

Highly Efficient Remediation of Chloridazon and Its Metabolites: The Case of Graphene Oxide Nanoplatelets

et al. 2020

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The contamination of aqueous environments by aromatic pollutants has become a global issue. Chloridazon, a herbicide considered as harmless to the ecosystem, has been widely used in recent decades and has accumulated, together with its degradation products desphenyl-chloridazon and methyl-desphenyl-chloridazon, to a non-negligible level in surface water and groundwater. To respond to the consequent necessity for remediation, in this work, we study the adsorption of chloridazon and its metabolites by graphene oxide and elucidate the underlying mechanism by X-ray photoelectron spectroscopy. We find a high adsorption capacity of 67 g kg–1 for chloridazon and establish that bonding of chloridazon to graphene oxide is mainly due to hydrophobic interaction and hydrogen bonding. These findings demonstrate the potential of graphene-based materials for the remediation of chloridazon and its metabolites from aqueous environments.

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“…With the rapid growth of production capacity and applications, although there is no clear literature on the amount of graphene in the environment [ 6 ], graphene-based materials will inevitably be leaked into the environment during production, storage, transportation, use, disposal and recycling. For example, a large number of graphene releases may occur when it be used in environmental protection, such as adsorption treatment of wastewater and drinking water, solid phase extraction, seawater desalination and coating of filtration materials [ 7 – 9 ]. Due to its superior adsorption performance, graphene is easy to interact with environmental pollutants after being released into the environment, and adsorbents are mainly absorbed on the sp 2 hybrid carbon atoms of graphene by van der Waals forces.…”

Section: Introductionmentioning

confidence: 99%

Safety assessment of graphene oxide and microcystin-LR complex: a toxicological scenario beyond physical mixture

Ding

Liu

et al. 2022

Part Fibre Toxicol

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Background Nanomaterials have been widely used in electrochemistry, sensors, medicine among others applications, causing its inevitable environmental exposure. A raising question is the “carrier” effect due to unique surface properties of nanomaterials, which may collectively impact the bioavailability, toxicokinetic, distribution and biological effects of classic toxicants. Noteworthy, this aspect of information remains largely unexplored. Methods Here, we deliberately selected two entities to mimic this scenario. One is graphene oxide (GO), which is made in ton quantity with huge surface-area that provides hydrophilicity and π–π interaction to certain chemicals of unique structures. The other is Microcystin-LR (MCLR), a representative double-bond rich liver-toxic endotoxin widely distributed in aquatic-system. Firstly, the adsorption of GO and MCLR after meeting under environmental conditions was explored, and then we focused on the toxicological effect and related mechanism of GO-MCLR complex on human skin cutin forming cells (HaCaT cells) and normal liver cells (L02 cells). Results Abiotically, our study demonstrated that GO could effectively adsorb MCLR through hydrogen bonding and π–π interaction, the oxidation degree of GO-MCLR decreased significantly and surface defect level raised. Compared to GO or MCLR, GO-MCLR was found to induce more remarkable apoptosis and ferroptosis in both HaCaT and L02 cells. The underlying mechanism was that GO-MCLR induced stronger intracellular reactive oxygen species (ROS) and mtROS generation, followed by Fe2+ accumulation, mitochondrial dysfunction and cytoskeletal damage. Conclusions These results suggest that the GO-MCLR complex formed by GO adsorption of MCLR may exhibit more toxic effects than the single material, which demonstrates the necessity for assessing nano-toxicant complexity. Our discovery may serve as a new toxicological paradigm in which nanomaterial mediated surface adsorption effects could impact the degree of cytotoxicity and toxicological mechanisms of classic toxins. Graphical Abstract

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Emerging role of graphene oxide as sorbent for pesticides adsorption: Experimental observations analyzed by molecular modeling

Cited by 38 publications

References 29 publications

Recent Strategies for Environmental Remediation of Organochlorine Pesticides

Recent Strategies for Environmental Remediation of Organochlorine Pesticides

Highly Efficient Remediation of Chloridazon and Its Metabolites: The Case of Graphene Oxide Nanoplatelets

Safety assessment of graphene oxide and microcystin-LR complex: a toxicological scenario beyond physical mixture

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