Copper chitosan nanocomposite: synthesis, characterization, and application in removal of organophosphorous pesticide from agricultural runoff

Jaiswal, Meha; Chauhan, Divya; Sankararamakrishnan, Nalini

doi:10.1007/s11356-011-0699-6

Cited by 87 publications

(25 citation statements)

References 16 publications

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“…The adsorption mechanisms of chitosan are mainly electrostatic and dipole interactions; however, complexation interactions, such as ion exchange, are also important. In contrast with the above report, Jaiswal et al (2012) found that there was no efficient removal of malathion from agricultural runoff using chitosan. Actually, aside from pesticide type, the difference in analysis techniques for pesticides could account for the opposite conclusion.…”

Section: Discussioncontrasting

confidence: 97%

Degradation of four organophosphorous pesticides catalyzed by chitosan-metal coordination complexes

Zhang

Meng

et al. 2015

Environ Sci Pollut Res

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Three types of chitosan with high (3.40 × 10(6)), medium (2.11 × 10(5)), and low (5.89 × 10(4)) molecular weights were chosen as ligands to synthesize chitosan magnesium, calcium, iron(III), and zinc coordination complexes. Degradation of four organophosphorous pesticides (dichlorvos, omethoate, dimethoate, and chlorpyrifos) by the above complexes in a heterogeneous system was studied using solid-phase extraction (SPE) and gas chromatography (GC). The degradation effect is related to the different types of chitosan, metal, and organophosphorus pesticides (OPs). Complexes of transition metals and the low molecular weight chitosan showed high hydrolytic activity. The chitosan-iron(III) complex was further used to study its catalytic kinetics on the hydrolysis of OPs. At pH 7.0 and 20 °C, the half-life of dichlorvos hydrolyzed by chitosan iron(III) was 52 h, whereas that of spontaneous dichlorvos hydrolysis was 105 h. The degradation ratio of omethoate and dimethoate increased to 38 and 52 %, respectively, which were 34 and 48 % higher than the control after 6 days at pH 7.0 and 20 °C. For all tested conditions, an increase of pH and temperature resulted in a higher degradation rate.

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Section: Discussioncontrasting

confidence: 97%

Degradation of four organophosphorous pesticides catalyzed by chitosan-metal coordination complexes

Zhang

Meng

et al. 2015

Environ Sci Pollut Res

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“…Because chitosan is positively-charged at low pH values, it may be an effective coagulant for anionic organic contaminants such as dyes, tannins and humic acids. Recently, toxic organic chemicals (e.g., phenol and bisphenol A (BPA)) have been remediated by using chitosan incorporated with enzymes (Suzuki et al 2010), clay (Fan et al 2007) and Cu(II) hydroxide nanoparticles (Jaiswal et al 2012). …”

Section: Remediation Of Organic Contaminantsmentioning

confidence: 99%

“…Desorption of clopyralid increased with higher salt concentrations, indicating a cation exchange sorption mechanism (Celis et al 2012). Apart from clay, Cu(II) hydroxide has been blended with chitosan to produce CuCH nanocomposites, for remediation of organophosphorous insecticides (i.e., parathion and methyl parathion) in agricultural runoff (Jaiswal et al 2012). Unlike the chitosan-montmorillonite nanocomposite, sorption of malathion onto a CuCH nanocomposite occurred through complexation.…”

Section: Remediation Of Organic Contaminantsmentioning

confidence: 99%

Environmental Applications of Chitosan and Its Derivatives

Yong

Shrivastava

Srivastava

et al. 2014

Reviews of Environmental Contamination and Toxicology Volume 233

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Chitosan originates from the seafood processing industry and is one of the most abundant of bio-waste materials. Chitosan is a by-product of the alkaline deacetylation process of chitin. Chemically, chitosan is a polysaccharide that is soluble in acidic solution and precipitates at higher pHs. It has great potential for certain environmental applications, such as remediation of organic and inorganic contaminants, including toxic metals and dyes in soil, sediment and water, and development of contaminant sensors. Traditionally, seafood waste has been the primary source of chitin. More recently, alternative sources have emerged such as fungal mycelium, mushroom and krill wastes, and these new sources of chitin and chitosan may overcome seasonal supply limitations that have existed. The production of chitosan from the above-mentioned waste streams not only reduces waste volume, but alleviates pressure on landfills to which the waste would otherwise go. Chitosan production involves four major steps, viz., deproteination, demineralization, bleaching and deacetylation. These four processes require excessive usage of strong alkali at different stages, and drives chitosan's production cost up, potentially making the application of high-grade chitosan for commercial remediation untenable. Alternate chitosan processing techniques, such as microbial or enzymatic processes, may become more cost-effective due to lower energy consumption and waste generation. Chitosan has proved to be versatile for so many environmental applications, because it possesses certain key functional groups, including - OH and -NH2 . However, the efficacy of chitosan is diminished at low pH because of its increased solubility and instability. These deficiencies can be overcome by modifying chitosan's structure via crosslinking. Such modification not only enhances the structural stability of chitosan under low pH conditions, but also improves its physicochemical characteristics, such as porosity, hydraulic conductivity, permeability, surface area and sorption capacity. Crosslinked chitosan is an excellent sorbent for trace metals especially because of the high flexibility of its structural stability. Sorption of trace metals by chitosan is selective and independent of the size and hardness of metal ions, or the physical form of chitosan (e.g., film, powder and solution). Both -OH and -NH2 groups in chitosan provide vital binding sites for complexing metal cations. At low pH, -NH3 + groups attract and coagulate negatively charged contaminants such as metal oxyanions, humic acids and dye molecules. Grafting certain functional molecules into the chitin structure improves sorption capacity and selectivity for remediating specific metal ions. For example, introducing sulfur and nitrogen donor ligands to chitosan alters the sorption preference for metals. Low molecular weight chitosan derivatives have been used to remediate metal contaminated soil and sediments. They have also been applied in permeable reactive barriers to remediate metals in soil and groun...

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“…Dimkpa, et al [11], demonstrated the potential effect toxic of ZnONPs on wheat pathogen, F. graminearum in liquid or solid medium sand matrix. Nanomaterials, chitosan-based copper have been used as antifungal, antibacterial as well as plant growth promoting agents [12][13][14][15]. Common bean is considered as one of the greatest vital leguminous crops cultivated in Egypt, where the seeds and pods are rich in calcium, some vitamins, proteins, mineral salts, some amino acids, especially lysine.…”

Section: Introductionmentioning

confidence: 99%

Antifungal Potent of Some Metallic Nanoparticles against Sclerotinia Sclerotiorum on Common Bean Plants: An Emphasis for Biochemical Alterations and Metal Accumulation

Abdel-Halim¹,

El-Ghanam²

2019

AJLS

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Antifungal efficacy for some oxides of metallic nanoparticles (NPs) e.g. magnesium (MgO), copper (CuO), silicon (SiO2) and zinc (ZnO) was evaluated against fungi, Sclerotinia sclerotioum on bean plants under different conditions. The examined NPs exhibited significant effect on hyphal morphology and fungal linear growth under field trail in the following order: MgONPs> SiO2NPs> ZnONPs> CuONPs compared with control group. However under storage condition, the disease severity along NPs-treated bean pods were in the order: MgONPs> SiO2NPs> ZnONPs> CuONPs compared with infected control which did not exceed 30.23% and non-infected (14.68%). Bean pods treated with NPs showed significantly increase in chlorophyll content, total phenols, and ascorbic acid compared with non-infected pods during storage period for 4 weeks. The examined NPs exhibited positive accumulation in pods tissues, except MgO was lower than non-infected group. The present findings may display the potential effect metal oxides in agricultural sector need more studies to achieve their adverse effects on consumers and environmental impacts.

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Copper chitosan nanocomposite: synthesis, characterization, and application in removal of organophosphorous pesticide from agricultural runoff

Abstract: The results indicated that CuCH could be applied for the removal of organophosphorous pesticides.

Cited by 87 publications

References 16 publications

Degradation of four organophosphorous pesticides catalyzed by chitosan-metal coordination complexes

Degradation of four organophosphorous pesticides catalyzed by chitosan-metal coordination complexes

Environmental Applications of Chitosan and Its Derivatives

Antifungal Potent of Some Metallic Nanoparticles against Sclerotinia Sclerotiorum on Common Bean Plants: An Emphasis for Biochemical Alterations and Metal Accumulation

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