Congo red removal by PANi/Bi2WO6 nanocomposites: Kinetic, equilibrium and thermodynamic studies

Laabd, Mohamed; Ahsaine, Hassan Ait; Jaouhari, Abdelhadi El; Bakiz, B.; Bazzaoui, M.; Ezahri, M.; Albourine, Abdallah; Benlhachemi, A.

doi:10.1016/j.jece.2016.06.024

Cited by 56 publications

(15 citation statements)

References 48 publications

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“…55 The adsorption isotherms of MB, CV and CR onto PC@alginate have been calculated using both Langmuir and Freundlich models. [56][57][58][59][60] The overall data indicate efficient dye removal in the case of MB and CV (>96%), without the occurrence of the solid/liquid separation problem. As a result of the adsorption isotherms ( Fig.…”

Section: Adsorption Studiesmentioning

confidence: 81%

Core–shell architecture based on bio-sourced porous carbon: the shape formation mechanism at the solid/liquid interface layer

2019

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Section: Adsorption Studiesmentioning

confidence: 81%

Core–shell architecture based on bio-sourced porous carbon: the shape formation mechanism at the solid/liquid interface layer

2019

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“… 59 The Freundlich isotherm model suggests that the biosorption process tends to be multiple layers over the heterogeneous adsorbent surface with different affinities of active sites. 60 The following formulas give the expressions of Langmuir and Freundlich models …”

Section: Methodsmentioning

confidence: 99%

Eco-Efficient Green Seaweed Codium decorticatum Biosorbent for Textile Dyes: Characterization, Mechanism, Recyclability, and RSM Optimization

et al. 2020

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Biosorption using natural waste has emerged as a potential and promising strategy for removal of toxic dyes from wastewaters in comparison to conventional ones. Herein, the Codium decorticatum alga (CDA) was biologically identified and used as a biosorbent for anionic and cationic dyes from aqueous solutions. SEM analysis showed a rough surface with an irregular edge and shape while hydroxyl, amine, sulfur and carboxyl functional groups were identified using FTIR analysis. TGA/DTG confirmed the stability of CDA and the adsorption process. Batch studies were conducted to investigate the effect of operational factors such as initial pH, biosorbent dosage, temperature, initial concentration, and solid/liquid contact time on the biosorption of crystal violet (CV) and Congo red (CR) dyes. For both CV and CR dyes, the biosorption kinetics was accurately described by the pseudo-second-order model and the Langmuir isotherm was found to be best fitted for equilibrium data. Maximum uptake capacities have attained up to 278.46 mg/g for CV and 191.01 mg/g for CR. The CV and CR dye biosorption mechanism was ultimately manifested through the electrostatic interactions. The regeneration study showed that the CDA presents excellent reuse performance up to four consecutive cycles. The process optimization was performed using the response surface methodology based on Box–Behnken design (RSM-BDD). Accordingly, the optimum predicted removal efficiencies using RSM-BBD for CV and CR were obtained, respectively, at 96.9 and 89.8% using a CDA dose of 1.5 g/L, dye concentration of 20 mg/L, pH of 10 for CV, and pH of 4 for CR. Overall, CDA behaves as an efficient, recyclable, cheap, and eco-friendly adsorbent for cleaning-up of dyed effluents.

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“…Bu çalışmada yalancı ikinci derece kinetik model, PANİ/SA yüzeyi ile AV 90 molekülleri arasında elektrostatik etkileşimler olduğunu söyleyebilmektedir. Benzer sonuç PANİ/ferrisiyanid [23], grafen/aljinat [17], PANİ [19] ve PANİ/Bi2WO6 [3] ile boyar madde adsorpsiyonu çalışmalarında gözlenmiştir.…”

Section: şEkil 8 Langmuir Izotermiunclassified

“…Sentetik boyar maddeler, tekstil, kozmetik, kağıt, plastik ve deri gibi bir çok endüstriyel alanda kullanılmakta ve bu sektörlerin atık suları önemli miktarlarda boyar madde içermektedir [1][2][3]. Günümüzde dünya çapında yaklaşık 100 000'in üzerinde boya ve pigment türü kullanılmakta ve yılda 700 000 tonun üzerinde boya üretilmektedir.…”

Section: Gi̇ri̇ş (Introduction)unclassified

“…pH etkisinin incelendiği deneylerde 50 mg/L boyar madde derişiminde ve 10 adet PANİ/Aljinat küresi kullanılmış ve adsorpsiyon deneyleri 72 saat boyunca takip sayısı artabilmekte ve bu durumda negatif yüklü AV 90 ile pozitif yüklü PANİ/SA yüzeyi arasındaki elektrostatik çekim kuvvetlerinin artmasından dolayı boyar madde giderim yüzdesi de artmaktadır. Benzer sonuç Kongo kırmızısı boyar maddesinin PANİ/Bi2WO6 adsorbenti ile gideriminde[3], kitosan-PANİ/ZnO kompozit malzemesi ile reaktif orange 16 adsorpsiyonunda[10], aljinatmontmorillonit-PANİ kompozit malzemesi ile reaktif orange 16 adsorpsiyonunda[16] elde edilmiştir.…”

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Polianilin/Aljinat Kompozit Malzemesinin Asit Violet 90 Boyar Maddesinin Gideriminde Kullanılması: Kinetik Ve İzoterm Değerlendirmesi

Okur¹,

Aktı²,

Çetintaş³

2018

Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım Ve Teknoloji

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Makale BilgisiÖz Bu çalışmada Polianilin/Aljinat (PANİ/SA) adsorbent malzemesi Asit Violet 90 (AV 90) boyar maddesinin adsorpsiyonunda kullanılmıştır. PANİ/SA'nın karakterizasyonu Fourier Dönüşüm Kızılötesi Spektroskopisi (FTIR) ile analiz edilmiştir. pH (2-6), PANİ/SA küre sayısı (10-50 adet) ve AV 90 derişiminin (25-200 mg/L) boyar madde giderimine etkisi incelenmiştir. En yüksek boyar madde giderimi pH 2'de elde edilmiştir. AV 90 adsorpsiyon izotermlerini belirlemek için Langmuir, Freundlich ve Temkin modelleri kullanılmıştır. Boyar madde derişimi 25-200 mg/L aralığında iken Langmuir modelinden elde edilen maksimum adsorpsiyon kapasitesi (qm) değeri 138,9 mg/g olarak bulunmuştur. Adsorpsiyon kinetiğinin belirlenmesi için Yalancı birinci derece ve ikinci derece kinetik modelleri kullanılmış ve Yalancı ikinci derece kinetik modelin deney verileri ile daha uyumlu olduğu görülmüştür. Deney sonuçları PANİ/SA adsorbentinin AV 90 boyar maddesinin adsorpsiyonu için oldukça iyi bir alternatif olduğunu göstermiştir. AbstractIn this study, Polyaniline/Alginate (PANI/SA) material was used to adsorption of Acid Violet 90 (AV 90) dye. The characterization of PANI/SA was analyzed by Fourier transform infrared spectroscopy (FTIR). The effect of pH (2-6), number of PANI/SA beads (10-50 adet) and concentration of AV 90 (25-200 mg/L) on removal of dye were examined. The highest dye removal was obtained at pH 2. Langmuir, Freundlich and Temkin models were used to determine AV 90 adsorption isotherms. The maximum adsorption capacity (qm) value obtained from the Langmuir model in the range of 25-200 mg/L dye concentrations was found to be 138.9 mg / g. To determine the adsorption kinetics, Pseudo first order and second order kinetic models were used and it was found that the Pseudo second order kinetic model was more compatible with the experimental data. Experimental results have shown that PANI/SA adsorbent is a very good alternative for adsorption of AV 90 dye.

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Congo red removal by PANi/Bi2WO6 nanocomposites: Kinetic, equilibrium and thermodynamic studies

Cited by 56 publications

References 48 publications

Core–shell architecture based on bio-sourced porous carbon: the shape formation mechanism at the solid/liquid interface layer

Core–shell architecture based on bio-sourced porous carbon: the shape formation mechanism at the solid/liquid interface layer

Eco-Efficient Green Seaweed Codium decorticatum Biosorbent for Textile Dyes: Characterization, Mechanism, Recyclability, and RSM Optimization

Polianilin/Aljinat Kompozit Malzemesinin Asit Violet 90 Boyar Maddesinin Gideriminde Kullanılması: Kinetik Ve İzoterm Değerlendirmesi

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