A Novel pH-Responsive p(AAm-co-METAC)/MMT Composite Hydrogel: Synthesis, Characterization and Its Absorption Performance on Heavy Metal İons

2015 ◽  
Vol 54 (6) ◽  
pp. 603-615 ◽  
Author(s):  
Pinar Ilgin ◽  
Halil Durak ◽  
Aycan Gür
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Composite Hydrogel ◽  
Ph Responsive ◽  
Hydrogel Synthesis ◽  
Absorption Performance

Adsorption performance of a polysaccharide composite hydrogel based on crosslinked glucan/chitosan for heavy metal ions

2019 ◽  
Vol 169 ◽  
pp. 45-54 ◽  
Author(s):  
Chenglong Jiang ◽  
Xiaohong Wang ◽  
Ganghu Wang ◽  
Chen Hao ◽  
Xin Li ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Composite Hydrogel ◽  
Adsorption Performance

Gelatin–chitosan hydrogel particles for efficient removal of Hg(ii) from wastewater

2019 ◽  
Vol 5 (1) ◽  
pp. 83-90 ◽  
Author(s):  
Saifullah Lone ◽  
Dong Ho Yoon ◽  
Hyangmoo Lee ◽  
In Woo Cheong
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Aqueous Medium ◽  
Heavy Metal Ions ◽  
Composite Hydrogel ◽  
Aqueous Mixtures ◽  
Efficient Removal ◽  
Chitosan Hydrogel ◽  
Environment Friendly ◽  
Hydrogel Particles

Composite hydrogel particles synthesized by crosslinking of gelatin and chitosan are examined for the adsorption of Hg(ii) metal ions in an aqueous medium. This work reports a straightforward, robust, scalable, and environment-friendly approach towards easy monitoring and removal of heavy metal ions from aqueous mixtures.

scholarly journals Preparation of Chitosan/Calcium Alginate/Bentonite Composite Hydrogel and Its Heavy Metal Ions Adsorption Properties

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1891
Author(s):  
Zongkun Lin ◽  
Yuru Yang ◽  
Zizhan Liang ◽  
Lei Zeng ◽  
Aiping Zhang
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Calcium Alginate ◽  
Heavy Metal Ions ◽  
Crosslinking Agent ◽  
Composite Hydrogel ◽  
Maximum Adsorption Capacity ◽  
Competitive Sorption ◽  
Operation Process ◽  
Kinetics And Isotherms

In order to avoid the secondary pollution of the toxic residue of chemical crosslinking agent accompanied by chemical hydrogel adsorbent and enhance the adsorption performance of physical hydrogel, chitosan/calcium alginate/bentonite (CTS/CA/BT) composite physical hydrogel was constructed. The formation mechanism and structure of the composite hydrogel were determined by FTIR, XRD and SEM. Adsorption performances of the hydrogel toward Pb2+, Cu2+ and Cd2+ in water under different condition as well as multi-ion competitive sorption were investigated. The adsorption processes were described with the canonical adsorption kinetics and isotherms models. With the utilization of XPS analysis and adsorption thermodynamics analysis, it was found that the adsorptions were spontaneous physico-chemical adsorptions. The results showed that the maximum adsorption capacity of the hydrogel for Pb2+, Cu2+ and Cd2+ reached up to 434.89, 115.30 and 102.38 mg·g−1, respectively, better than those of other physical hydrogels or chitosan/bentonite composite. Moreover, the composite hydrogel improved the collectability of bentonite and showed a good reusability. The modification of bentonite and the formation of hydrogel were completed simultaneously, which greatly simplifies the operation process compared with the prior similar works. These suggest that the CTS/CA/BT composite hydrogel has promising application prospects for removal of heavy metal ions from water.

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