44
In addition, to synthesize hydrogels for the purpose of sorption of metal ions,
cellulose was grafted into acrylamide. The grafting conditions were explored, and
the sorption by grafted cellulose of various metal ions was investigated. The cellulose derivatives were also used for the preparation of adsorbent hydrogels (O’Connell
et al. 2006).
The ideal conditions for removing nickel from water using prepared copolymers
were investigated by varying pH, contact time, and levels of metal ions. Starch is a
natural polymeric material (primarily hydrocarbon) made up of a big amount of
units of glucose joined by glycosidic bonds. Most green crops produce this polysaccharide for energy conservation. Starch is next commonly available material after
cellulose carbohydrate and exists in big quantities in main foods such as maize
(corn), wheat, potatoes, rice, and cassava. As it comprises two molecular types, it
has a distinctive structure: straight chain or cyclic amylose and branched amylopectin. Starch usually includes 20–25% amylose and 75–80% amylopectin by weight,
depending on the plant. Intensive research has been conducted to utilize in wastewater removal of heavy metals. In this regard, the initiator used ceric ammonium ion
to synthesize graft copolymers of acrylonitrile and cassava starch solution made up
in water. The prepared copolymer was used to absorb toxic cations from the water
bodies as a sorbent. The sorption capability was assessed by evaluating the magnitude of nickel, copper, and lead metal ion sorption under circumstances of equilibrium (Liu et al. 2012).
2.9 Hydrogels as Heavy Metal Adsorbent
Hydrogels were prepared, described, and examined on the basis of saponified polyacrylonitrile and starch composites with water solubility characteristics. These
hydrogels “water absorbency” characteristics were discovered to depend on factors
that affect the levels of both saponification and polymerization. The hydrogels
100
98
96
94
92
90
88
86
84 1
2
Number of cycles
Adsorption Percentage
3
4
5
6
7
8
9 10
Fig. 2.5 The sorption and
desoption cycles.
(Modified Mahajun and
Sud 2012)
A. Sabir et al.
In addition, to synthesize hydrogels for the purpose of sorption of metal ions,
cellulose was grafted into acrylamide. The grafting conditions were explored, and
the sorption by grafted cellulose of various metal ions was investigated. The cellulose derivatives were also used for the preparation of adsorbent hydrogels (O’Connell
et al. 2006).
The ideal conditions for removing nickel from water using prepared copolymers
were investigated by varying pH, contact time, and levels of metal ions. Starch is a
natural polymeric material (primarily hydrocarbon) made up of a big amount of
units of glucose joined by glycosidic bonds. Most green crops produce this polysaccharide for energy conservation. Starch is next commonly available material after
cellulose carbohydrate and exists in big quantities in main foods such as maize
(corn), wheat, potatoes, rice, and cassava. As it comprises two molecular types, it
has a distinctive structure: straight chain or cyclic amylose and branched amylopectin. Starch usually includes 20–25% amylose and 75–80% amylopectin by weight,
depending on the plant. Intensive research has been conducted to utilize in wastewater removal of heavy metals. In this regard, the initiator used ceric ammonium ion
to synthesize graft copolymers of acrylonitrile and cassava starch solution made up
in water. The prepared copolymer was used to absorb toxic cations from the water
bodies as a sorbent. The sorption capability was assessed by evaluating the magnitude of nickel, copper, and lead metal ion sorption under circumstances of equilibrium (Liu et al. 2012).
2.9 Hydrogels as Heavy Metal Adsorbent
Hydrogels were prepared, described, and examined on the basis of saponified polyacrylonitrile and starch composites with water solubility characteristics. These
hydrogels “water absorbency” characteristics were discovered to depend on factors
that affect the levels of both saponification and polymerization. The hydrogels
100
98
96
94
92
90
88
86
84 1
2
Number of cycles
Adsorption Percentage
3
4
5
6
7
8
9 10
Fig. 2.5 The sorption and
desoption cycles.
(Modified Mahajun and
Sud 2012)
A. Sabir et al.