94
5 Biopolymer Chitosan Membranes Prepared from Fishery Waste …
stable adsorbents that reveal a wide explicitly, chitosan has shown a good compatibility for aluminium metal ions [4], cadmium [1], chromium [5], copper [6], iron
[7], mercury [8].
The next quite common, readily available polymer besides cellulose, is chitosan
extracted from chitin. Chitin comprises of amino glucose with a normal dispersion of
acetyl groups and is found in arthropods, crustaceans and insect exoskeletons. While
chitin can be obtained from mushrooms and algae, it is only produced commercially
from crustaceans, i.e. crabs, lobsters, prawns and shrimp shell waste. The processing
of chitin at such a heated level of high basic solution such as sodium hydroxide and
potassium hydroxide is used to manufacture chitosan by the process known as chitin
deacetylation.
The utility of chitosan polymers resides in its potential to turn into particles or
gel form which could be transformed onto various shapes to be used in a wide range
of end-user applications. Chitosan gel beads have been extensively documented for
use in water purification [8–10], though gel-type materials may not be researched
regularly, probably, owing to insufficient data concerning its design and use. The
performance of the chitosan membranes in terms of flux and adsorption capability
relies on the production process in the areas of water processing [3]. In past findings,
the surface characteristics of chitosan membranes in relation to metal ion removal
from aqueous solution were investigated [3]. The adsorption properties of crosslinked chitosan membranes were explored in this research, while further focusing on
adsorption to Zn(II). To offer additional perspective through their use of chitosan geltype biopolymer membranes to water management processes, both the adsorption
stability and the kinetics of adsorption and desorption were studied.
5.2 Materials and Methods
5.2.1 Materials
Chitosan particles are extracted from seashell shrimp which were acquired in Cape
Town, South Africa’s natural environment. The extent of deacetylation was estimated
to be 80 mol per cent, and molecular weight was determined to be 144 kg/mol
using size exclusion chromatography (SEC). The formulation and corresponding
evaluation of chitosan particles were carried out as originally proposed by Osifo et al.
[11]. Glutaraldehyde was obtained from Sigma-Aldrich (about 99.5%). Hydrochloric
acid (about 99%), acetic acid (about 99%), sodium hydroxide (about 99%) have all
been procured via Sigma-Aldrich. The solution’s pH was regulated with a pH metre
(Hanna HI 8421) and was acquired from Sigma-Aldrich. Ultima 888 water distiller
was applied in the school laboratory for the production of pure water. A shaker
(Labcon incubator) was employed for the sample adsorption investigation.
5 Biopolymer Chitosan Membranes Prepared from Fishery Waste …
stable adsorbents that reveal a wide explicitly, chitosan has shown a good compatibility for aluminium metal ions [4], cadmium [1], chromium [5], copper [6], iron
[7], mercury [8].
The next quite common, readily available polymer besides cellulose, is chitosan
extracted from chitin. Chitin comprises of amino glucose with a normal dispersion of
acetyl groups and is found in arthropods, crustaceans and insect exoskeletons. While
chitin can be obtained from mushrooms and algae, it is only produced commercially
from crustaceans, i.e. crabs, lobsters, prawns and shrimp shell waste. The processing
of chitin at such a heated level of high basic solution such as sodium hydroxide and
potassium hydroxide is used to manufacture chitosan by the process known as chitin
deacetylation.
The utility of chitosan polymers resides in its potential to turn into particles or
gel form which could be transformed onto various shapes to be used in a wide range
of end-user applications. Chitosan gel beads have been extensively documented for
use in water purification [8–10], though gel-type materials may not be researched
regularly, probably, owing to insufficient data concerning its design and use. The
performance of the chitosan membranes in terms of flux and adsorption capability
relies on the production process in the areas of water processing [3]. In past findings,
the surface characteristics of chitosan membranes in relation to metal ion removal
from aqueous solution were investigated [3]. The adsorption properties of crosslinked chitosan membranes were explored in this research, while further focusing on
adsorption to Zn(II). To offer additional perspective through their use of chitosan geltype biopolymer membranes to water management processes, both the adsorption
stability and the kinetics of adsorption and desorption were studied.
5.2 Materials and Methods
5.2.1 Materials
Chitosan particles are extracted from seashell shrimp which were acquired in Cape
Town, South Africa’s natural environment. The extent of deacetylation was estimated
to be 80 mol per cent, and molecular weight was determined to be 144 kg/mol
using size exclusion chromatography (SEC). The formulation and corresponding
evaluation of chitosan particles were carried out as originally proposed by Osifo et al.
[11]. Glutaraldehyde was obtained from Sigma-Aldrich (about 99.5%). Hydrochloric
acid (about 99%), acetic acid (about 99%), sodium hydroxide (about 99%) have all
been procured via Sigma-Aldrich. The solution’s pH was regulated with a pH metre
(Hanna HI 8421) and was acquired from Sigma-Aldrich. Ultima 888 water distiller
was applied in the school laboratory for the production of pure water. A shaker
(Labcon incubator) was employed for the sample adsorption investigation.