Hydrogel beads based on carboxymethyl cellulose for removal heavy metal ions

2010 ◽  
Vol 119 (2) ◽  
pp. 1204-1210 ◽  
Author(s):  
Shaoping Yang ◽  
Shiyu Fu ◽  
Hao Liu ◽  
Yiming Zhou ◽  
Xueyun Li
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Carboxymethyl Cellulose ◽  
Heavy Metal Ions ◽  
Hydrogel Beads

scholarly journals Preparation and characterization of p-sulfonated calix[4]arene functionalized chitosan hydrogel beads and their preliminary adsorption study towards removal of lead(II) and zinc(II) ions

2020 ◽  
Vol 16 (4) ◽  
pp. 429-432
Author(s):  
Hamizah Syahirah Mohamad Zubir ◽  
Mohd Haniff Wahid ◽  
Irene Ling ◽  
Hong Ngee Lim ◽  
Sazlinda Kamaruzaman ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Metal Ion ◽  
Heavy Metal Ions ◽  
Sodium Hydroxide Solution ◽  
Acetic Acid Solution ◽  
Chitosan Hydrogel ◽  
Metal Ion Removal ◽  
Hydrogel Beads ◽  
Modified Chitosan

p-sulfonated calix[4]arene functionalized chitosan hydrogel beads have been successfully prepared by mixing p-sulfonated calix[4]arene and chitosan in dilute acetic acid  solution (1% v/v), followed by dropping the mixture into sodium hydroxide solution to form beads with diameters of ~0.1 cm. The presence of the active sulfonate groups and the unique structure of calixarene render the material useful as an adsorbent for heavy metal ions. Metal adsorption on p-sulfonated calix[4]arene is possible through a combination of physical and ionic interactions. Atomic Absorption Spectroscopy (AAS) results showed that the amount of adsorbed metal ion is optimum at 10 ppm for all samples. The overall percentage of metal ion removal shows that p-sulfonated calix[4]arene modified chitosan is the best adsorbent with up to 98% removal achieved for Pb(II) and 90% removal for Zn(II). This is followed by p-sulfonated calix[4]arene and graphene oxide (GO) modified chitosan with up to 90% removal for Pb(II)  and 89% removal for Zn(II) and pure chitosan hydrogel beads with up to 60% removal for both Pb(II)  and Zn(II). The results clearly prove that the presence of p-sulfonated calix[4]arene can enhance the adsorption of heavy metal ions. In addition, the adsorbent shows higher Pb(II) removal compared to Zn(II).

Facile microfluidic synthesis of copolymer hydrogel beads for the removal of heavy metal ions

2016 ◽  
Vol 51 (23) ◽  
pp. 10375-10385 ◽  
Author(s):  
Juan Li ◽  
Jingjing Tong ◽  
Xinhui Li ◽  
Zhanjun Yang ◽  
Yongcai Zhang ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Hydrogel Beads ◽  
Copolymer Hydrogel

All-carboxymethyl cellulose sponges for removal of heavy metal ions

Cellulose ◽  
2021 ◽  
Author(s):  
Xiaobo Lin ◽  
Jingyu Jin ◽  
Xiangyang Guo ◽  
Xiangxiang Jia
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Carboxymethyl Cellulose ◽  
Heavy Metal Ions

Removal of dyes and heavy metal ions from water by magnetic hydrogel beads based on poly(vinyl alcohol)/carboxymethyl starch-g-poly(vinyl imidazole)

RSC Advances ◽  
2015 ◽  
Vol 5 (79) ◽  
pp. 64106-64118 ◽  
Author(s):  
Zahra Sekhavat Pour ◽  
Mousa Ghaemy
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Poly Vinyl Alcohol ◽  
Nanocomposite Hydrogel ◽  
Hydrogel Beads ◽  
Carboxymethyl Starch ◽  
Magnetic Hydrogel ◽  
Highly Porous ◽  
Magnetic Nanocomposite Hydrogel

Highly porous magnetic nanocomposite hydrogel (m-CVP) beads were prepared and used for the removal of dyes and heavy metal ions.

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