Reduction of Imidacloprid by Sponge Iron and Identification of its Degradation Products

Zhou, Xiaohui; Tian, Ying; Liu, Xiao; Huang, Liping; Wen, Yang

doi:10.2175/106143017x15131012188187

Cited by 14 publications

(5 citation statements)

References 21 publications

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“…Based on the related products, it can be inferred that imidacloprid is degraded to produce 2-chloro-5-carboxy pyridine by hydroxylation and carbonylation, respectively. At the end of the three pathways, the pyridine ring undergoes dechlorination, and the final mineralization of imidacloprid is achieved [96][97][98][99][100][101].…”

Section: Degradation Of Imidacloprid By Physicochemical Methodsmentioning

confidence: 99%

Insights into the Toxicity and Degradation Mechanisms of Imidacloprid Via Physicochemical and Microbial Approaches

Pang

Lin

Zhang

et al. 2020

Toxics

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Imidacloprid is a neonicotinoid insecticide that has been widely used to control insect pests in agricultural fields for decades. It shows insecticidal activity mainly by blocking the normal conduction of the central nervous system in insects. However, in recent years, imidacloprid has been reported to be an emerging contaminant in all parts of the world, and has different toxic effects on a variety of non-target organisms, including human beings, due to its large-scale use. Hence, the removal of imidacloprid from the ecosystem has received widespread attention. Different remediation approaches have been studied to eliminate imidacloprid residues from the environment, such as oxidation, hydrolysis, adsorption, ultrasound, illumination, and biodegradation. In nature, microbial degradation is one of the most important processes controlling the fate of and transformation from imidacloprid use, and from an environmental point of view, it is the most promising means, as it is the most effective, least hazardous, and most environmentally friendly. To date, several imidacloprid-degrading microbes, including Bacillus, Pseudoxanthomonas, Mycobacterium, Rhizobium, Rhodococcus, and Stenotrophomonas, have been characterized for biodegradation. In addition, previous studies have found that many insects and microorganisms have developed resistance genes to and degradation enzymes of imidacloprid. Furthermore, the metabolites and degradation pathways of imidacloprid have been reported. However, reviews of the toxicity and degradation mechanisms of imidacloprid are rare. In this review, the toxicity and degradation mechanisms of imidacloprid are summarized in order to provide a theoretical and practical basis for the remediation of imidacloprid-contaminated environments.

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Section: Degradation Of Imidacloprid By Physicochemical Methodsmentioning

confidence: 99%

Insights into the Toxicity and Degradation Mechanisms of Imidacloprid Via Physicochemical and Microbial Approaches

Pang

Lin

Zhang

et al. 2020

Toxics

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“…The final transformed products were monitored and analyzed using HPLC-ESI/MS and a reaction mechanism was proposed considering the different products (as shown in Scheme 7). [70] Yari et al, in 2019 developed a chemical free method for the degradation of imidacloprid pesticide in aqueous phase. The degradation analysis was carried out in ultraviolet C (UV-C) using ZnO and TiO 2 .…”

Section: Chemical Approachmentioning

confidence: 99%

“…The final transformed products were monitored and analyzed using HPLC‐ESI/MS and a reaction mechanism was proposed considering the different products (as shown in Scheme 7). [70] …”

Section: Approaches For the Elimination/degradation Of Imidaclopridmentioning

confidence: 99%

A Review on Methods for the Elimination of Imidacloprid: 2018–2022

Kathuria,

Bhattu,

Bankar

et al. 2023

ChemistrySelect

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Imidacloprid, a neonicotinoid insecticide is used widely in agricultural fields to control insect pests. It exhibits insecticidal property by blocking the insect nicotinic acetylcholine receptors (nAChRs). However, its excessive use over the decades has become hazardous to the living beings and environment. Thus, it is crucial to find out an efficient and effective way for the elimination of imidacloprid from the environment. To meet this requirement, scientists across the world are working on various remediation approaches such as physical (adsorption), chemical (oxidation, hydrolysis, illumination) and biological (microbial degradation). This review focuses on various approaches for the elimination of imidacloprid from the environment and also highlights the associated merits and demerits. The review will pave the way for the scientific community to develop more simple and eco‐friendly approaches for imidacloprid elimination.

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“…32 IMD urea was the principal degradation product by hydrolysis and in weak alkaline media, which has been proven to have lower toxicity than the parent compound and can be easily mineralized. 33,34 IMD guanidine was formed by the loss of the -NO 2 group aer H + attacking the moiety of N-NO 2 of IMD, 35 which showed higher mammalian toxicity than the parent compound. However, this intermediate could eventually be converted into nontoxic molecular fragments in the natural environment.…”

Section: Electroreduction Of Imidaclopridmentioning

confidence: 99%

“…While diverse microorganisms may potentially degrade insecticides, IMD is none biodegradable due to its high toxicity. 3,4 A lot of work has focussed on exploring effective methods for IMD treatment. Ultraviolet (UV) photolysis with photocatalysis and photo-Fenton's reagent are the most intensively applied technologies.…”

Section: Introductionmentioning

confidence: 99%

Comparison of two different nickel oxide films for electrochemical reduction of imidacloprid

et al. 2020

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A nickel oxide (NiO) thin film was successfully prepared on Ni foil via a sol-gel method and a reduced state nickel oxide (r-NiO) thin film was obtained by etching NiO with hydrazine hydrate solution. Structure characterization through X-ray diffraction and scanning electron microscopy revealed the growth of nanostructure films on the surface of nickel foil. Cyclic voltammetry, linear sweep voltammetry and electrochemical impedance spectroscopy were used to assess the performance of the two films.Electroreduction of alkaline imidacloprid solution under potentiostatic conditions was carried out in a three-electrode system. The removal efficiencies of 80.2% (r-NiO) and 66.3% (NiO), and the current efficiencies of 67.3% (r-NiO) and 58.9% (NiO) were much higher than 41.7% (removal efficiency) and 0.003% (current efficiency) on the bare Ni electrode. This study prepared two novel thin films with composites of NiO or r-NiO, and thus provided feasible and efficient electrochemical degradation of imidacloprid. The degradation products were characterized and the possible degradation pathways were proposed.

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Reduction of Imidacloprid by Sponge Iron and Identification of its Degradation Products

Cited by 14 publications

References 21 publications

Insights into the Toxicity and Degradation Mechanisms of Imidacloprid Via Physicochemical and Microbial Approaches

Insights into the Toxicity and Degradation Mechanisms of Imidacloprid Via Physicochemical and Microbial Approaches

A Review on Methods for the Elimination of Imidacloprid: 2018–2022

Comparison of two different nickel oxide films for electrochemical reduction of imidacloprid

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