Comparative adsorption studies of indigo carmine dye on chitin and chitosan

Prado, Alexandre G.S.; Torres, Jocilene D.; Faria, Elaine A.; Dias, Sílvia C.L.

doi:10.1016/j.jcis.2004.04.056

Cited by 166 publications

(65 citation statements)

References 16 publications

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“…The thermodynamic values obtained with this study were in concordance with the values obtained by Evangelista et al (2007) [24] with silica gel modified by 2-mercaptothiazoline adsorbing Hg (II) in aqueous medium. The spontaneity of this adsorption process is indicated by negative values of D int G and D int H. The highest entropic values were observed for cation with the largest hydration volumes and illustrate the principle that the loss of water of hydration leads to a disorganization of the final systems [25][26][27]. In conclusion, all thermodynamic values are favorable, with exothermic enthalpy, negative Gibbs free energy, and positive entropy, and corroborate arsenic cation/unmodified and modified matrices adsorption at the solid/liquid interface.…”

Section: [Figura 7: Efeitos Térmicos Resultantes Das Isotermas De Adsmentioning

confidence: 80%

Performance of natural and modified smectite: kinetic and thermodynamics involving arsenic (V) adsorption

2010

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A natural smectite sample has been modified by organofunctionalization process using synthetic route involved the reaction of 2-mercaptopyrimidine with 3-chloropropyltriethoxysilane. The resulting material (S MPY ) was characterized by SEM, FTIR, textural analysis and 29 Si MAS-NMR. The ability of this material to removed As (V) from aqueous solution was followed by series of adsorption isotherms adjusted to the Langmuir equation at room temperature and pH 2.0. The kinetic parameters analyzed by Lagergren and Elovich models gave a good fit for a pseudo-second order reaction with k 2 in the 4.9 to 14.0 mmol -1 min -1 range for S MPY . The adsorption process was exothermic (D int H = -4.09 to -5.79 kJ.mol -1 ) accompanied by increase in entropy (D int S = 41.29 to 61.80 JK -1 .mol -1 ) and Gibbs energy (D int G = -22.34 to -24.19 kJmol -1 ). The energetic effect caused by arsenic cation adsorption was determined through calorimetric titration at the solid-liquid interface and gave a net thermal effect that enabled the calculation of the exothermic values and the equilibrium constant. Keywords: adsorption, smectite, kinetic, thermodynamic, arsenic. Resumo Uma amostra de esmectita natural foi modificada por processo de organofuncionalização usando rota sintética, envolvendo a reação de 2-mercaptopirimidina com 3-cloropropiltrietoxisilano. O material resultante (S MPY)

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Section: [Figura 7: Efeitos Térmicos Resultantes Das Isotermas De Adsmentioning

confidence: 80%

Performance of natural and modified smectite: kinetic and thermodynamics involving arsenic (V) adsorption

2010

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“…Some of the reported adsorbents include agricultural and poultry by-products (eggshell waste, bagasse pith, maize cob, hen feathers, rice husk, and coconut shell), industrial waste products (waste carbon slurries and metal hydroxide sludge), clay materials (bentonite and kaolinite), zeolites, siliceous material (silica beads, alunite, and perlite), bio-sorbents (chitosan, peat, and biomass) and others (starch, cyclodextrin, and cotton), microorganisms such as algae [3][4][5][6][7][8][9][10][11][12][13]. Chitosan has received considerable interest for heavy metals removal due to its excellent metal-binding capacities and low cost, as can be obtained for free from fishery wastes such as shrimp, lobster, and crab shells [14][15][16][17][18].…”

Section: Chemistry Education Study Program Faculty Of Teacher Trainimentioning

confidence: 99%

Potency of Chitin as an Adsorbent in Black Water Treatment Process at Peatland Environment

Syahmani¹,

Leny²,

Iriani³

et al. 2018

Proceedings of the 1st International Conference on Social Sciences Education - "Multicultural Transformation in Education, Soci

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Abstract-The main problem in treatment peat water is related to its specific characteristics, such as low pH (3-4), high organic content, high Fe and Mn content, and dark brown or black water. The objectives of this research are: (1) to determine the potency and effectiveness of chitin as an adsorbent in black water treatment process using column system, and (2) to know the desorption capability of dilute acid toward the Fe and Mn cations that adsorbed in chitin column. The results showed that chitin was successfully isolated from shrimp waste by hydrolysis reaction (including three steps namely deproteination, decalcification, and decolorizing). Chitin column system is effective enough to be used as an adsorbent black water. Active sites of chitin (acetamide and hydroxyl) have the ability to adsorb metals contained in the black water of eco-friendly land. The maximum ability of chitin in black water treatment happened at 30 cm display column and 6 drops/min for flow rate. In this maximum condition, chitin column ability reduces Fe, Mn, dissolved solids, BOD, COD, pH, temperature, and color respectively as much as 86.69%, 91.80%, 98.67%, up to 275%, below 99%, neutral pH range, normal air temperature, and colorless. Thus, chitin can be utilized to treat black water until it is suitable to drink. People knowledge about chitin potency as the adsorbent in black water can transform the habit of people around black water environment in using black water. Black water will be used by people around peatland environment after the treatment by chitin as a tool to the black water treatment process.

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“…Kitosan ile adsorpsiyon prosesinde Gibbs serbest enerjisinin değerini negatif olarak belirlenmiştir. Deneysel sonuçlardan 298.15 o K sıcaklıkta kitosan adsorpsiyonunun bu makalede sunulan çalışmaya benzer şekilde kendiliğinden gerçekleştiği tespit edilmiştir (Prado et al 2004). …”

Section: Tartişma Ve Sonuçlarunclassified

Asi̇di̇k Boyarmadde İçeren Teksti̇l Endüstri̇si̇ Atiksularindan Adsorpsi̇yon Yöntemi̇yle Renk Gi̇deri̇lmesi̇

Köylü¹,

Gönen²,

Önalan³

2015

AUBTD-A

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ASİDİK BOYARMADDE İÇEREN TEKSTİL ENDÜSTRİSİ ATIKSULARINDAN ADSORPSİYON YÖNTEMİYLE RENK GİDERİLMESİ ÖZBu çalışmada, atıksulardan boyarmadde gideriminde yaygın olarak kullanılan adsorbentlere alternatif olabilecek yüksek giderim verimine sahip kitosan malzemesi kullanılmıştır. Acid Blue 29(AB 29) boyarmaddesinin kitosan üzerine adsorpsiyonunda, pH, adsorbent derişimi(X), başlangıç boyarmadde derişimi ve sıcaklık gibi ortam parametrelerinin etkisi incelenerek proses için en uygun değerler saptanmıştır. Deneysel sonuçlardan, adsorpsiyonun dengeye 15-20 dakikada ulaştığı gözlenmiştir. Bu denge sürecinde en iyi adsopsiyon verimi pH=4, X=1.0g/L ile T=35°C değerlerinde elde edilmiştir. Adsorpsiyon denge verilerinin Langmuir ve Freundlich izoterm modellerine uyumluluk durumu araştırıldığında, en iyi uyumun en yüksek regresyon katsayılarının elde edildiği Langmuir modelinde gerçekleştiği gözlenmiştir. AB 29 boyarmaddesinin kitosana adsorpsiyonunun kinetic analizi amacıyla deneysel verilere yalancı birinci ve ikinci derece kinetik model uygulanmış, tüm korelasyon katsayılarının 0.99'dan büyük olması, deneysel ve teorik değerlerin birbirine çok yakın çıkmasından dolayı adsorpsiyon kinetiğinin ikinci derece kinetik modele oldukça iyi uyum sağladığı belirlenmiştir. Sistem termodinamik açıdan analiz edildiğinde ise, adsorpsiyonda elde edilen negative ΔG o değerleri adsorpsiyonun kendiliğinden gerçekleştiğini, adsorpsiyonun gerçekleşmesi için bir enerji engelinin olmadığını göstermiştir. Yapılan çalışma sonucunda boyarmadde gideriminde kitosanın diğer adsorbentlere alternatif bir adsorbent olarak kullanılabileceği düşünülmektedir.Anahtar kelimeler:Kitosan, Adsorpsiyon, İzoterm, Kinetik, Acid Blue 29. COLOR REMOVAL BY ADSORPTION PROCESSES OF TEXTILE INDUSTRY WASTEWATER CONTAINING ACIDIC DYES ABSTRACTIn this study, chitosan material as an alternative adsorbent to the commonly used materials with high removal efficiency were used for the removal of dye from wastewater. In the adsorption of Acid Blue 29(AB 29) dye onto chitosan, the adsorption parameters such as pH, adsorbent concentration, initial dye concentration and temperature were investigated and the optimum conditions for the adsorption process were determined. From the experimental results, it was observed that adsorption reached to the equilibrium in 15-20 minutes . The highest removal yield in the equilibrium process was obtained at pH=4 , X=1.0 g/L (adsorbent concentration) values and T=35 °C .When the fitting of the adsorption data to Langmuir and Freundlich isotherm models were investigated, the best fitting was observed to Langmuir model with the highest regression coefficients.

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Comparative adsorption studies of indigo carmine dye on chitin and chitosan

Cited by 166 publications

References 16 publications

Performance of natural and modified smectite: kinetic and thermodynamics involving arsenic (V) adsorption

Performance of natural and modified smectite: kinetic and thermodynamics involving arsenic (V) adsorption

Potency of Chitin as an Adsorbent in Black Water Treatment Process at Peatland Environment

Asi̇di̇k Boyarmadde İçeren Teksti̇l Endüstri̇si̇ Atiksularindan Adsorpsi̇yon Yöntemi̇yle Renk Gi̇deri̇lmesi̇

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