Studies on the Preparation Modified Chitosan and Its Applications

Abstract

Chitosan, as a natural polysaccharide, has reactive amino and hydroxyl groups in its linear polyglucosamine chains, can be used to functionalize and modify. However, conventional modification method using single chitosan crosslinking with glutaraldehyde generally leads to decrease of functional groups (-NH 2 -) and loading capacity, it's interested to prepare multifunctional chitosan-X which used in many applications such as water treatment by using diethylenetriamine pentaacetic acid (DTPA) with sufficient number of carboxyl groups on the backbones, is a commonly used as chelating agent for heavy metal. The preparation of modified chitosan investigated by IR, XRD, SEM and also mechanical properties which determined the comparative and competitive adsorption of some metal ions from aqueous solutions. Kinetic and thermodynamics of single system were studied.

Investigate the adsorption mechanism of heavy metals as aluminum ions (Al+3) from different solutions using modified chitosan

“…The adsorption parameters obtained from both the models were given in Table ( 1). The investigational data were fixed well with Langmiur isotherm suggesting that the Al(III) adsorbed from monolayer treatment on the adsorbent surface.…”

“…Chitosan, as a normal polysaccharide, has reactive amino and hydroxyl groups in its linear polyglucosamine chains, can be used to functionalize and modify. However, conventional modification method using single chitosan crosslinking with glutaraldehyde generally leads to cut of practical group (-NH 2 -) and loading facility, its attracted to set up multifunctional chitosan-x which used in a lot of applications such as water treatment by using diethylenetriamine pentaacetic acid (DTPA) with satisfactory number of carboxyl groups on the backbones, is a generally used as chelating agent for heavy metal [1]. The aim of this learn [2] is to assess the taking away of Fe(III) ions from aqueous solutions against modified chitosan.…”

Investigate the adsorption mechanism of heavy metals as chromium ions (Cr+3) from different solutions using modified chitosan

“…However, cross-linking of chitosan slightly reduce the adsorption aptitude because both amino and hydroxyl groups of chitosan are bound with the crosslinker and consequently cannot interact with the pollutants. As a general comment, in more recent years, researchers have attempted to prepare chitosanbased modifying the molecules of chitosan [1][2][3][4][5][6].…”