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- W4387409237 startingPage "107255" @default.
- W4387409237 abstract "In this study, a simple two-step preparation method was used to prepare a new type of composite fiber adsorbent, metal–organic framework/chitosan/hydroxyapatite (ZIF-8@CS/HAP), for the efficient removal of Lead ions（Pb(Ⅱ)）from water. The composite fiber was first characterized, and its surface morphology, functional groups, crystallinity, and pore structure were investigated. Subsequently, its optimal use environment was studied, and results found that the adsorbent could achieve the best effect in Pb(Ⅱ) solution with a starting concentration of 200 mg/L at pH ≥ 6 and a temperature of around 298 K. The presence of coexisting ions (Co2+, Sr2+, Ni2+, Cd2+, and Cu2+) had no significant effect on the selective removal of Pb(Ⅱ) by ZIF-8@CS/HAP. The process of ZIF-8@CS/HAP adsorbing Pb(II) corresponded to the Langmuir model and the pseudo-second-order kinetic model, according to isotherm and kinetic investigations. The adsorption data fitted with the Langmuir model at 298 K reached a fitting degree (R2) of 0.996, and the largest adsorption capacity up to 1058.2 mg/g, which is better than that in most fiber adsorbents. The adsorption mechanism could be attributed to the complexation of hydroxyl and amino groups on the surface of the composite fiber with Pb(Ⅱ), the coprecipitation of phosphate groups with Pb(Ⅱ), ion exchange, and electrostatic adsorption. This study provides an efficient adsorbent for treating Pb(Ⅱ)-contaminated wastewater. Its preparation process is environmental-friendly and easy to use, and it has a high adsorption capacity. Therefore, it has a wide array of potential applications in the field of water treatment." @default.
- W4387409237 created "2023-10-07" @default.
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- W4387409237 date "2023-10-01" @default.
- W4387409237 modified "2023-10-08" @default.
- W4387409237 title "In situ growth ZIF-8 on porous chitosan/hydroxyapatite composite fibers for ultra-efficiently eliminating lead ions in wastewater" @default.
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- W4387409237 doi "https://doi.org/10.1016/j.mtcomm.2023.107255" @default.
- W4387409237 hasPublicationYear "2023" @default.
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