Adsorption of lead ions from wastewater using electrospun zeolite/MWCNT nanofibers: kinetics, thermodynamics and modeling study

Heavy metal contamination in water is a serious environmental issue due to the toxicity of metals like lead. This study developed zeolite and multi-walled carbon nanotube (MWCNT) incorporated polyacrylonitrile (PAN) nanofibers via needleless electrospinning and examined their potential for lead ion...

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Bibliographic Details
Published in:RSC advances 2024-02, Vol.14 (9), p.5959-5974
Main Authors: Mahmood, Urwa, Alkorbi, Ali S, Hussain, Tanveer, Nazir, Ahsan, Qadir, Muhammad Bilal, Khaliq, Zubair, Faheem, Sajid, Jalalah, Mohammed
Format: Article
Language:English
Subjects:
Adsorbents
Aqueous solutions
Artificial neural networks
Chemistry
Electrospinning
Heavy metals
Ion adsorption
Kinetics
Lead
Modelling
Monomolecular films
Multi wall carbon nanotubes
Nanofibers
Polyacrylonitrile
Response surface methodology
Thermodynamics
Wastewater treatment
Zeolites
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Summary:Heavy metal contamination in water is a serious environmental issue due to the toxicity of metals like lead. This study developed zeolite and multi-walled carbon nanotube (MWCNT) incorporated polyacrylonitrile (PAN) nanofibers via needleless electrospinning and examined their potential for lead ion adsorption from aqueous solutions. The adsorption process was optimized using response surface methodology (RSM) and artificial neural network (ANN) modeling approaches. The adsorbent displayed efficient lead removal of 84.75% under optimum conditions (adsorbent dose (2.21 g), adsorption time (207 min), temperature (48 °C), and initial concentration (62 ppm)). Kinetic studies revealed that the adsorption followed pseudo-first-order kinetics governed by interparticle diffusion. Isotherm analysis indicated Langmuir monolayer adsorption with improved 5.90 mg g −1 capacity compared to pristine PAN nanofibers. Thermodynamic parameters suggested the adsorption was spontaneous and endothermic. This work demonstrates the promise of electrospun zeolite/MWCNT nanofibers as adsorbents for removing lead from wastewater. Heavy metal contamination in wastewater is a serious environmental issue due to the toxicity of metals like lead.
ISSN:2046-2069
2046-2069
DOI:10.1039/d3ra07720a