Metal complexation of chitosan and its glutaraldehyde cross-linked derivative

Webster, Athena; Halling, Merrill D.; Grant, David M.

doi:10.1016/j.carres.2007.03.008

Cited by 107 publications

(55 citation statements)

References 45 publications

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“…The behavior of chitosan shown here -with a maximum at pH 7 for Alizarin and Eriochrome Blue Black R -has been seen in Cr adsorption on chitosan. 39 Partial agglomerations at pH 5 because of protonation -and therefore unavailability of active adsorption sites -and intramolecular bonding and electrostatic repulsion at pH 9 where the absence of protanated amino groups in alkaline media restrains the interaction of chitosan with the negative charges of the dye can explain this apparently anomalous behavior with pH when Alizarin and Eriochrome Blue Black R adsorption are analyzed. 40 Chitosan does not adsorb Fluorescein in appreciable amounts.…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Elimination of dyes from aqueous solutions using iron oxides and chitosan as adsorbents: a comparative study

Pirillo¹,

Pedroni²,

Rueda³

et al. 2009

Quím. Nova

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Recebido em 5/9/08; aceito em 4/12/08; publicado na web em 7/5/09This work investigates the adsorption of Alizarin, Eriochrome Blue Black R and Fluorescein using chitosan, goethite and magnetite as adsorbents. For Alizarin, the best adsorbent is chitosan with a Langmuir parameter of 15.8 mmol dye/g adsorbent. For Eriochrome Blue Black R only 1.94 mmol dye/g chitosan is adsorbed. Langmuir parameters for the Alizarin adsorption on both iron oxides display one or two orders of magnitude lower than for chitosan and two orders of magnitude lower in the case of Eriochrome Blue Black R. Fluorescein does not adsorb in appreciable amounts on chitosan and it presents the lower affinity on the iron oxides.

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Section: Adsorption Isothermsmentioning

confidence: 99%

Elimination of dyes from aqueous solutions using iron oxides and chitosan as adsorbents: a comparative study

Pirillo¹,

Pedroni²,

Rueda³

et al. 2009

Quím. Nova

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“…As a result, GA is widely used as a crosslinker to connect amino groups. (17) According to the results shown in Fig. 12, GA reacted with amino groups on the surface of the aminated cellulose film to form an ethylated surface (No.…”

Section: Detection Of Protein Using Aminated Cellulose Film Modified mentioning

confidence: 99%

Development of Wireless Electrical Conductivity Sensor Screening System to Evaluate Protein Binding to Sensor Films

2017

Sensors and Materials

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We developed a wireless electrical conductivity (EC) sensor screening system to evaluate changes in the EC of sensor films. This sensor system was designed to be equipped with a special sensor chip (14 × 40 mm 2 ), and changes in the EC of a droplet containing a sensor film (ϕ3 mm) on the chip were determined. Electrode pairs were fabricated on glass substrates by photolithography, and a well structure was formed around each electrode pair using photoreactive resin. This sensor system achieved parallel detection of EC signals from five wells, each containing 5 μl of solution with a sensor film in 10 s (N = 5). Furthermore, we developed sensor films that displayed the changes in the EC upon the adsorption and/or chemical binding of protein with Na + as a counterion. To form the sensor films, the surface of cellulose was chemically modified with alkylamino groups. The EC detected the sensor screening system using aminated cellulose with physically adsorbed bovine serum albumin (BSA) and the amount of Na + ions increased linearly with BSA concentration with a correlation coefficient (R 2 ) of 0.87. Meanwhile, aminated cellulose with chemically bound BSA through polylysine and glutaraldehyde and adsorbed Na + exhibited an EC that depended on the BSA concentration, with an R 2 value of 0.943. The detection limit of BSA was 10 ng/ml for both types of sensor film. On the basis of our results, the mechanism behind the increased sensitivity of the sensor films with immobilized protein in the presence of a counterion was proposed.

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“…1 H-NMR and 13 C-NMR spectra were recorded with a model FX-80-Q Fourier transform nuclear magnetic resonance spectrometer (Peabody, USA). Differential scanning calorimetry (DSC) analysis was carried out with a Shimadzu DSC-50 (Schimadzu Scientific Instruments, USA), and the scanning was carried out within the temperature range 25-800 C at a heating rate of 10 C/min under a nitrogen atmosphere.…”

Section: Instrumentationmentioning

confidence: 99%

“…[7][8][9][10] The modification of the polymer surface through the introduction of new complexation groups may result in the formation of efficient chelates, which thus increases its adsorption capacity and selectivity toward metal ions in solution. [11][12][13] Generally, various studies have been conducted to make derivatives of chitosan by chemical modification techniques, such as grafting, sulfonation, quaternization, hydroxylation, and carboxymethylation. Among the derivatives, the grafting of carboxylic functions has been regarded frequently as an interesting process for increasing the adsorption properties of chitosan.…”

Section: Introductionmentioning

confidence: 99%

Chitosan modified with a polydentate crosslinker for metal‐ion adsorption

Krishnapriya

Kandaswamy

2009

J of Applied Polymer Sci

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The chemical modification on chitosan (CTS) was carried out by cross-linking it with precursor compound 3,3 0 -dimethoxy-4,4 0 -dihydroxy-5,5 0 -bis(N,N 0 -piperazine-1-yl methyl benzaldehyde), (PC) in order to improve the metal ion adsorption capacities and selectivity of the product. The resulting crosslinked chitosan derivative (CCTSL) was characterized by elemental analysis, Fourier transform infrared spectrum (FTIR), Differential Scanning calorimetry (DSC), Scanning Electron Microscopy (SEM) and powder X-ray diffraction (XRD) studies. Adsorption experiments (pH dependency, kinetics, and equilibrium) of CCTSL towards various metal ions (Mn 2þ , Fe 2þ , Co 2þ , Cu 2þ , Ni 2þ , Cd 2þ and Pb 2þ ) were investigated. The adsorption was dependent on pH of the solution, with a maximum capacity between pH 6.5 and 8.5. The adsorption kinetics data were best fitted with pseudo second-order model, which gave a correlation coefficient of 0.999. The adsorption process could be described with Langmuir isotherm (R ¼ 0.999), which revealed that the maximum capacity for monolayer saturation was 79 mg Cu(II) per gram of CCTSL (1.24 mmol g À1

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Metal complexation of chitosan and its glutaraldehyde cross-linked derivative

Cited by 107 publications

References 45 publications

Elimination of dyes from aqueous solutions using iron oxides and chitosan as adsorbents: a comparative study

Elimination of dyes from aqueous solutions using iron oxides and chitosan as adsorbents: a comparative study

Development of Wireless Electrical Conductivity Sensor Screening System to Evaluate Protein Binding to Sensor Films

Chitosan modified with a polydentate crosslinker for metal‐ion adsorption

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