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Journals / Adıyaman Üniversitesi Fen Bilimleri Dergisi / 2020 / Cilt: 10 - Sayı: 1

Preparation and Characterization of Polyvinyl Alcohol/Activated Carbon (PVA/AC) Composite and Its Use in the Adsorption of 4-Nitrophenol (4-NP)

Polivinil Alkol/Aktif Karbon (PVA/AC) Kompozitinin Hazırlanması ve Karakterizasyonu ve 4-Nitrofenol (4-NP) Adsorpsiyonunda Kullanımı

Hatice KARAER YAĞMUR
Pages
160–178
Publication Date
2022-10-12
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

According to the results, adsorption of 4-NP onto composite best fitted to Freundlich model.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:In this study, polyvinyl alcohol-activated carbon (PVA/AC) composite was synthesized and characterized by SEM, FTIR, DLS and TGA-DSC measurement.
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Key Findings & Data:The zero point charge for the PVA/AC was determined as approximately 3 pH.
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Conclusion & Impact:According to the results, adsorption of 4-NP onto composite best fitted to Freundlich model.
🔬Design:Modeling & Simulation
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

In this study, polyvinyl alcohol-activated carbon (PVA/AC) composite was synthesized and characterized by SEM, FTIR, DLS and TGA-DSC measurement. The zero point charge for the PVA/AC was determined as approximately 3 pH. The efficiency of PVA/AC as a cheap adsorbent for removal of 4-nitrophenol (4-NP) from aqueous solution was researched at 298, 318 and 328 K. For this purpose, Freundlich and Langmuir isotherm models were used. According to the results, adsorption of 4-NP onto composite best fitted to Freundlich model. The pseudo-firstorder, pseudo-second-order and intraparticle diffusion models were utilized to study the adsorption kinetics. The experimental consequences fitted with the pseudo-first-order model. According to Arrhenius equation, Ea was calculated as 14.13 kJmol-1 . Thermodynamic parameters were also calculated, which revealed that the adsorption process is endothermic, not spontaneous. Keywords: Adsorption; Activated carbon; Polyvinyl alcohol; 4-nitrophenol (4-NP); Zero point charge.

Özet

Bu çalışmada polivinil alkol/aktif karbon (PVA/AC) kompoziti sentezlendi ve SEM, FTIR, DLS ve TGA-DSC ölçümleriyle karakterize edildi. PVA/AC için sıfır noktası yükü yaklaşık 3 pH olarak belirlenmiştir. Sulu çözeltiden 4-nitrofenolün (4-NP) uzaklaştırılması için ucuz bir adsorban olarak PVA / AC'nin etkinliliği 298, 318 ve 328 K'de araştırıldı. Bu amaçla Freundlich ve Langmuir izoterm modelleri kullanıldı. Sonuçlara göre, 4-NP'nin kompozit üzerine adsorpsiyonunda Freundlich model en uygundu. Adsorpsiyon kinetiklerini incelemek için psödo birinci derece, psödo ikinci derece ve partikül içi difüzyon modelleri kullanıldı.Deneysel sonuçlar psödo birinci derece modeline uydu. Arrhenius denklemine göre Ea, 14.13 kJmol-1 olarak hesaplandı. Termodinamik parametreler hesaplandı, adsorpsiyon sürecinin endotermik olduğu kendiliğinden olmadığı belirlendi. Anahtar Kelimeler: Adsorpsiyon; Aktif karbon; Polivinil alkol; 4-nitrofenol (4-NP); Sıfır nokta yükü.

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Cite This Article

YAĞMUR, H. K. (2022). Preparation and Characterization of Polyvinyl Alcohol/Activated Carbon (PVA/AC) Composite and Its Use in the Adsorption of 4-Nitrophenol (4-NP). Adıyaman Üniversitesi Fen Bilimleri Dergisi, Cilt: 10 - Sayı: 1, 160–178. https://ajindex.com/articles/428439

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