Chitosan crosslinked with polyamine-co-melamine for adsorption of Hg2+: Application in purification of polluted water

Shen, Weibo; Fang, Yueru; Azeem, Muhammad; Gao, Yang; Li, Xianxi; Zhao, Peng; Ali, Amjad; Li, Manlin; Li, Ronghua

doi:10.1016/j.ijbiomac.2021.03.166

Cited by 23 publications

(3 citation statements)

References 31 publications

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“…In general, the Hg(II) and Cr(VI) adsorption over CNTs–PLA–Pd occurred through monolayer molecular covering and chemisorption together [ 74 ]. The maximum adsorption capacity (q m ) of CNTs–PLA–Pd estimated for Hg(II) and Cr(VI) adsorption was compared to the reported values for different adsorbents and presented in Table 3 and Table 4 , respectively [ 75 , 76 , 77 , 78 , 79 , 80 , 81 , 82 , 83 ]. The stability of CNTs–PLA–Pd was estimated by recovering and applying it in three subsequent cycles of adsorption of Hg(II).…”

Section: Resultsmentioning

confidence: 99%

Facilitated Adsorption of Mercury(II) and Chromium(VI) Ions over Functionalized Carbon Nanotubes

Neelgund

Jimenez

Ray

et al. 2023

Toxics

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By considering the importance of water and its purity, herein, a powerful adsorbent has been developed for the adsorption of two toxic contaminants that commonly exist in water, viz., divalent mercury and hexavalent chromium. The efficient adsorbent, CNTs–PLA–Pd, was prepared by covalent grafting polylactic acid to carbon nanotubes and subsequent deposition of palladium nanoparticles. The CNTs–PLA–Pd could adsorb Hg(II), and Cr(VI) entirely exists in water. The adsorption rate for Hg(II) and Cr(VI) was rapid at initial stage, followed by gradual decrease, and attained the equilibrium. The Hg(II) and Cr(VI) adsorption was perceived within 50 min and 80 min, respectively with CNTs–PLA–Pd,. Further, experimental data for Hg(II) and Cr(VI) adsorption was analyzed, and kinetic parameters were estimated using pseudo–first and second–order models. The adsorption process of Hg(II) and Cr(VI) followed the pseudo–second–order kinetics, and the rate–limiting step in the adsorption was chemisorption. The Weber−Morris intraparticle pore diffusion model revealed that the Hg(II) and Cr(VI) adsorption over CNTs–PLA–Pd occurs through multiple phases. The experimental equilibrium parameters for the Hg(II) and Cr(VI) adsorption were estimated by Langmuir, Freundlich, and Temkin isotherms models. All three models were well suited and demonstrated that Hg(II) and Cr(VI) adsorption over CNTs–PLA–Pd transpires through monolayer molecular covering and chemisorption.

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Section: Resultsmentioning

confidence: 99%

Facilitated Adsorption of Mercury(II) and Chromium(VI) Ions over Functionalized Carbon Nanotubes

Neelgund

Jimenez

Ray

et al. 2023

Toxics

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“…Chitosan can be complexed with metal ions and adsorb metal ions. 40,41 After crosslinking, the number of active sites on the chitosan surface for adsorbing metal ions decreases, leading to reduction in the adsorption capacity. To increase the ability of chitosan to adsorb metal ions, incorporating reactive groups via chemically grafting process after crosslinking is often applied.…”

Section: Paper Energy and Environmental Sciencementioning

confidence: 99%

Double selective ionic gel with excellent thermopower and ultra-high energy density for low-quality thermal energy harvesting

Hu,

Wei,

et al. 2024

Energy Environ. Sci.

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“…Herein, the gold adsorption process of CTF-MG was described using the Langmuir and Freundlich models. Their linear forms are as follows: 49,50 Langmuir model:…”

Section: Njc Papermentioning

confidence: 99%

Facile synthesis of a novel covalent triazine framework for recovering gold(i) from thiosulfate solution

Zeng,

Chen,

et al. 2024

New J. Chem.

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Chitosan crosslinked with polyamine-co-melamine for adsorption of Hg2+: Application in purification of polluted water

Cited by 23 publications

References 31 publications

Facilitated Adsorption of Mercury(II) and Chromium(VI) Ions over Functionalized Carbon Nanotubes

Facilitated Adsorption of Mercury(II) and Chromium(VI) Ions over Functionalized Carbon Nanotubes

Double selective ionic gel with excellent thermopower and ultra-high energy density for low-quality thermal energy harvesting

Facile synthesis of a novel covalent triazine framework for recovering gold(i) from thiosulfate solution

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