Interaction of heavy metals with chitin and chitosan. III. Chromium

Maruca, R.; Suder, Billie Jo; Wightman, J. P.

doi:10.1002/app.1982.070271227

Cited by 115 publications

(62 citation statements)

References 4 publications

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“…In addition to their ability to form complexes with plant nutrients, chitin and its derivatives can also form complex with non-nutrient elemental ions, including a number of heavy metals [199]. This has led to interest in chitin treatment to remediate polluted soils and water sources [200][201][202].…”

Section: Chitin's Ability To Alter a Plant's Resistance To Abiotic Stmentioning

confidence: 99%

A Review of the Applications of Chitin and Its Derivatives in Agriculture to Modify Plant-Microbial Interactions and Improve Crop Yields

2013

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Abstract:In recent decades, a greater knowledge of chitin chemistry, and the increased availability of chitin-containing waste materials from the seafood industry, have led to the testing and development of chitin-containing products for a wide variety of applications in the agriculture industry. A number of modes of action have been proposed for how chitin and its derivatives can improve crop yield. In addition to direct effects on plant nutrition and plant growth stimulation, chitin-derived products have also been shown to be toxic to plant pests and pathogens, induce plant defenses and stimulate the growth and activity of beneficial microbes. A repeating theme of the published studies is that chitin-based treatments augment and amplify the action of beneficial chitinolytic microbes. This article reviews the evidence for claims that chitin-based products can improve crop yields and the current understanding of the modes of action with a focus on plant-microbe interactions.

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Section: Chitin's Ability To Alter a Plant's Resistance To Abiotic Stmentioning

confidence: 99%

A Review of the Applications of Chitin and Its Derivatives in Agriculture to Modify Plant-Microbial Interactions and Improve Crop Yields

2013

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“…20,21 When chitosan was used to modify GCE as the dispersant of MWNT, there was an intensive H-bond interaction between it and -OH, which existed in the structures of DA and AA. Meanwhile, the subtle carbon nanotube provided many active sites enhancing the transfer of charge between the electrodes and the reagents, 22 all of which lead to great eletrocatalysis towards DA and AA.…”

Section: Mechanism Of Electrocatalysis Towards Da and Aa By The Mc/gcementioning

confidence: 99%

A Chitosan-Multiwall Carbon Nanotube Modified Electrode for Simultaneous Detection of Dopamine and Ascorbic Acid

et al. 2004

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Dopamine (DA) is a very important neurotransmitter in the mammalian central nervous system. Because low levels of DA have been found in patients with Parkinson's disease, 1 its detection with high selectivity and sensitivity is of great significance in investigating its physiological functions and the diagnose of nervous diseases resulting from an abnormal metabolite. When solid electrodes are used to detect DA, the main and foremost difficulty is the interference of ascorbic acid (AA), which is oxidized at almost the same potential as DA.2 It is thus very important to develop an electrochemical method of high selectivity and sensitivity for the determination of DA.Chitosan, which is derived from chitin, has excellent biologic compatibility and can be used as a modifier because it has many amino and hydroxyl groups.3-8 Besides, using a natural polymer as a dispersant is a requirement of environment protection. Carbon nanotubes have attracted much attention because they have the ability to promote electron transfer reactions when used as electrode materials, 9,10 but carbon nanotubes are very stable and insoluble in most solvents, which restrained its application in electroanalysis. Thus, in this study, a multiwall carbon nanotube (MWNT)-chitosan modifier was obtained by putting MWNT into a chitosan solution (0.5%). The MWNTchitosan modified electrode (MC/GCE) has many advantages with regard to a low detection limit, a fast response, excellent reproducibility for the detection for DA and AA simultaneously. Experimental ApparatusAll of the electrochemical measurements were carried out with a bioanalytical system CV-50W electrochemical analyzer. The three-electrode system consisted of a modified GCE, a saturated calomel reference electrode (SCE), and a platinum auxiliary electrode. All potentials were referred to the SCE. The transmission electron microscopy image was done with a TEM-100CXII. ReagentsDopamine, ascorbic acid (Fluka Corp.). A chitosan solution (0.5%) was prepared by dissolving 0.05 g of chitosan in 10 ml acetic acid (2 mol l -1 ). 11 The MWNT used in this work (obtained from the Institute of Nanometer, Central China Normal University) was synthesized by catalytic pyrolysis and purified followed the method given in a reference. 12 Preparation for a MWNT-chitosan modified electrodeUpon putting 1 mg of MWNT into 5 mL of a chitosan solution (0.5%), ultrasonic agitation for a few minutes gave 0.2 mg ml -1 of a black suspension. Before being modified, the GCE was polished with 0.3 µm and 0.05 µm aluminum slurry, rinsed thoroughly with redistilled water, then ultrasonically rinsed with alcohol, redistilled water for 1 min each, and dried under an infrared lamp. After the GCE was cooled, it was smeared evenly with 10 µl of a MWNT-chitosan (0.5%) solution by a micro-syringe, and then dried under an infrared lamp for 10 min. After cooling, the MC/GCE could be used. Experimental procedureA 0.1 mol l -1 phosphate buffer solution (pH = 7.2) was used as the supporting electrolyte for the determination of DA and AA...

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“…Chitosan (CHT), a deacetylated derivative of chitin, has numerous applications in different fields including photography [5], metal capture from waste water (Hg 2+ , Cr 3+ ) [6][7][8], and acid dye sorption [9]. The low cost of CHT compared with commercial activated carbon as well as its possible biodegradability made it suitable for removal of heavy metals from industrial effluent [10].…”

Section: Introductionmentioning

confidence: 99%

Facile Preparation of Biocomposite from Prawn Shell Derived Chitosan and Kaolinite-Rich Locally Available Clay

Biswas

Rashid

Mallik

et al. 2017

International Journal of Polymer Science

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A novel composite material was prepared from prawn shell derived chitosan (CHT) and locally available kaolinite-rich modified Bijoypur clay (MC) using a facile technique in which dilute acetic acid was used as a solvent for dissolving chitosan and composite fabrication whereas distilled water was used for preparing the clay dispersion. Bijoypur clay mainly consists of kaolinite clay mineral and it was modified with the dodecyl amine to make it organophilic. Morphology and properties of the composites (different weight ratio of MC and CHT) have been studied and compared with those of pure CHT and MC. Purification and modification of Bijoypur clay were investigated by X-ray diffraction (XRD), X-ray fluorescence (XRF), and Fourier transformed infrared spectroscopy (FTIR) analyses. The fabrication of CHT-MC composites was confirmed by FTIR analysis. Thermogravimetric analysis (TGA) and differential scanning colorimetry (DSC) were used to investigate the thermal stability of the composites. It was observed that dispersed clay improves the thermal stability and enhances the hardness of the matrix systematically with the increase of clay loading. In this study, a better insolubility in both acidic and alkaline media of the composites is also observed compared to pure chitosan.

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Interaction of heavy metals with chitin and chitosan. III. Chromium

Cited by 115 publications

References 4 publications

A Review of the Applications of Chitin and Its Derivatives in Agriculture to Modify Plant-Microbial Interactions and Improve Crop Yields

A Review of the Applications of Chitin and Its Derivatives in Agriculture to Modify Plant-Microbial Interactions and Improve Crop Yields

A Chitosan-Multiwall Carbon Nanotube Modified Electrode for Simultaneous Detection of Dopamine and Ascorbic Acid

Facile Preparation of Biocomposite from Prawn Shell Derived Chitosan and Kaolinite-Rich Locally Available Clay

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