Effective removal of Cu<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="d1e491" altimg="si51.svg"><mml:msup><mml:mrow/><mml:mrow><mml:mn>2</mml:mn><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:math> from aqueous solution by synthetic abalone shell hydroxyapatite microspheres adsorbent

Wang, Hongbo; Yan, Kuangqi; Xing, Huaran; Chen, Jingdi; Lu, Rong Rong

doi:10.1016/j.eti.2021.101663

Cited by 13 publications

(1 citation statement)

References 29 publications

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“…Based on the analysis of the adsorption mechanism, the adsorption of heavy metal ions was divided into the following steps: (1) Cu(II), Cd(II), and Pb(II) were rapidly complexed on the surface of the hydrogel for good adsorption; (2) through ion exchange, the original position of the sodium ions was replaced by heavy metal ions [51][52][53].…”

Section: Adsorption Mechanismmentioning

confidence: 99%

Synthesis of Cellulose–Poly(Acrylic Acid) Using Sugarcane Bagasse Extracted Cellulose Fibres for the Removal of Heavy Metal Ions

Xie

Wen

et al. 2023

IJMS

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In this study, sugarcane bagasse (SCB) was treated with sodium hydroxide and bleached to separate the non-cellulose components to obtain cellulose (CE) fibres. Cross-linked cellulose–poly(sodium acrylic acid) hydrogel (CE–PAANa) was successfully synthesised via simple free-radical graft-polymerisation to remove heavy metal ions. The structure and morphology of the hydrogel display an open interconnected porous structure on the surface of the hydrogel. Various factors influencing batch adsorption capacity, including pH, contact time, and solution concentration, were investigated. The results showed that the adsorption kinetics were in good agreement with the pseudo-second-order kinetic model and that the adsorption isotherms followed the Langmuir model. The maximum adsorption capacities calculated by the Langmuir model are 106.3, 333.3, and 163.9 mg/g for Cu(II), Pb(II), and Cd(II), respectively. Furthermore, X-ray photoelectron spectroscopy (XPS) and energy-dispersive X-ray spectrometry (EDS) results demonstrated that cationic exchange and electrostatic interaction were the main heavy metal ions adsorption mechanisms. These results demonstrate that CE–PAANa graft copolymer sorbents from cellulose-rich SCB can potentially be used for the removal of heavy metal ions.

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Section: Adsorption Mechanismmentioning

confidence: 99%