Effect of process parameters on the synthesis and lead ions removal performance of novel porous hydroxyapatite sheets prepared via non-aqueous precipitation method

Zheng, Entao; Feng, Guo; Jiang, Feng; Shao, Chuan; Fu, Huiqun; Hu, Zi; Wu, Qian; Yang, Qing; Liu, Jianmin

doi:10.1016/j.ceramint.2023.12.406

Cited by 7 publications

(1 citation statement)

References 29 publications

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“…Various water treatment strategies were tested for the elimination of lead from polluted water, including chemical precipitation [4], ion exchange [5], electrocoagulation [6], membrane separation [7], photocatalysis [8], bioremediation [9], and adsorption [10][11][12]. Among them, the adsorption method is an extremely effective approach for eradicating several pollutants.…”

Section: Introductionmentioning

confidence: 99%

Enhanced adsorption of lead (II) ions onto cellulose nanoparticles/chitosan composite based on loofah sponge: kinetic and thermodynamic studies

Matter,

Hassan,

Elfaramawy

et al. 2024

Biomass Conv. Bioref.

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The purpose of this work is to study the efficiency of lead ions removal via adsorption onto created solid nanomaterials. Three solid adsorbents were synthesized as cellulose nanoparticles (CN) extracted from plant loofah sponge using alkali treatment and acid hydrolysis techniques, chitosan beads (CZ), and cellulose nanoparticles/chitosan beads composite (CZC). The generated solid adsorbents were investigated using TGA, N2 adsorption/desorption, ATR-FTIR spectroscopy, SEM, TEM, XRD, and pHPZC. Based on our findings, CZC had a pHPZC of 7.2, a larger specific surface area (645.3 m2/g), and a total pore volume (0.372 cm3/g). The batch adsorption of lead ions was well-fitted by pseudo-second order, Elovich, Langmuir, Temkin, and Dubinin-Radushkevich on all the samples. Cellulose nanoparticles/chitosan composite had the highest Langmuir adsorption capacity (221.104 mg/g) at 47°C, 120 min as shaking time, 2 g/L as adsorbent dose, and pH 6.5. Nitric acid had the highest desorption percentage (92%). The thermodynamic investigation revealed that lead ion adsorption is endothermic, favorable, spontaneous, and physisorption. Our findings showed that CZC has a high adsorption capacity and rapid kinetics, indicating its potential for employment in water treatment.

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