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Chitosan crosslinked with polyamine-co-melamine for adsorption of Hg2+: Application in purification of polluted water.
Shen, Weibo; Fang, Yueru; Azeem, Muhammad; Gao, Yuxi; Li, Xianxi; Zhao, Peng; Ali, Amjad; Li, Manlin; Li, Ronghua.
Afiliación
  • Shen W; College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, PR China. Electronic address: shenweibo@nwafu.edu.cn.
  • Fang Y; College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, PR China. Electronic address: fangyueru@nwafu.edu.cn.
  • Azeem M; College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, PR China. Electronic address: azeem@iue.ac.cn.
  • Gao Y; College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, PR China.
  • Li X; College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, PR China.
  • Zhao P; College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, PR China.
  • Ali A; College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, PR China. Electronic address: amjadali@aup.edu.pk.
  • Li M; College of Chemistry and Pharmacy, Shaanxi Key Lab Nat Prod & ChemBiol, Northwest A&F University, Yangling, Shaanxi 712100, PR China. Electronic address: lixylml@nwsuaf.edu.cn.
  • Li R; College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, PR China. Electronic address: rh.lee@nwsuaf.edu.cn.
Int J Biol Macromol ; 181: 778-785, 2021 Jun 30.
Article en En | MEDLINE | ID: mdl-33798587
A batch experiment was carried out in order to remove Hg2+ from the aqueous solution as well as the polluted water using modified chitosan (CS) with polyamine compounds (triethylenetetramine (TETA), tetraethylenepentamine (TEPA)), and melamine. The obtained polyamine-co-melamine crosslinked CS derivatives (MCS-4N and MCS-5N) were characterized and used as adsorbents. In comparison to the raw CS, the modification significantly promoted the adsorption of Hg2+ ions. The results of the pseudo-second-order kinetic model revealed that pH-dependent derivatives adsorbents achieved the equilibrium state within 12 h. The Langmuir model was best fitted with the Hg2+ adsorption isotherm and showed the highest adsorption capacities of 140.3 and 109.7 mg/g for MCS-4N and MCS-5N, respectively. A slight decrease in the adsorption efficiency of Hg2+ was noticed with the increment of the ionic strength of the solution. However, the studied adsorbents were easily regenerated and presented adequate reusability. The Hg2+ adsorption was regulated by the combined process of coordination reaction and electrostatic attraction as well. The as-prepared polyamine-co-melamine crosslinked CS derivatives were found potential adsorbents for the adsorptive capture of Hg2+ ions from aqueous solutions and polluted waters.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Poliaminas / Triazinas / Contaminantes Químicos del Agua / Purificación del Agua / Reactivos de Enlaces Cruzados / Quitosano / Mercurio Tipo de estudio: Prognostic_studies Idioma: En Revista: Int J Biol Macromol Año: 2021 Tipo del documento: Article Pais de publicación: Países Bajos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Poliaminas / Triazinas / Contaminantes Químicos del Agua / Purificación del Agua / Reactivos de Enlaces Cruzados / Quitosano / Mercurio Tipo de estudio: Prognostic_studies Idioma: En Revista: Int J Biol Macromol Año: 2021 Tipo del documento: Article Pais de publicación: Países Bajos