Adsorption of direct yellow 27 from water by poorly crystalline hydroxyapatite prepared via precipitation method

Mahmud, Khalid; Islam, Md. Azharul; Mitsionis, Anastasios; Albanis, T. A.; Vaimakis, T.

doi:10.1080/19443994.2012.664699

Cited by 22 publications

(13 citation statements)

References 47 publications

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“…The adsorption Langmuir model is applied on the following assumptions: 1) strong uniform adsorption sites, 2) the monolayer coverage, and 3) no lateral interaction between adsorbed molecules. The linear form of this isotherm is represented as follows [48]:…”

Section: Isotherm Studiesmentioning

confidence: 99%

Removal of Methylene Blue from Water Using Hydroxyapatite Submitted to Microwave Irradiation

Allam¹,

Bouari²,

Belhorma³

et al. 2016

JWARP

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This study investigated the power of hydroxyapatite adsorbent prepared by a combined precipitation-microwave method, for removing a cationic dye methylene blue in aqueous media. The used adsorbent was characterized by X-ray diffraction (XRD) and infrared spectroscopy (IR). The adsorption tests were conducted in batch mode. The effect of temperature, the pH of the solution and the mass of the adsorbent on the adsorption were determined. It is found that the adsorption was pH and temperature dependent. The kinetic study showed that the second-order model gives a better description of the kinetics of the adsorption reaction than the first-order model. Analysis of adsorption isotherms using different classical models showed that adsorption may be governed by the isotherms of Langmuir. The thermodynamic parameters were determined from the values of the maximum adsorption capacity and equilibrium constants.

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Section: Isotherm Studiesmentioning

confidence: 99%

Removal of Methylene Blue from Water Using Hydroxyapatite Submitted to Microwave Irradiation

Allam¹,

Bouari²,

Belhorma³

et al. 2016

JWARP

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“…[15,16] Nanosized hydroxyapatite (nHAP, Ca 10 (PO 4 ) 6 (OH) 2 ) has recently attracted considerable attention as an ideal amendment for the remediation of contaminated soil, water and sediment, given the distinct crystal structure and unique physicochemical properties of nHAP. [17] The effective removal of direct yellow 27, [18] reactive blue 204, [19] and methylene blue [20] by nHAP have been reported in the literature.…”

mentioning

confidence: 99%

Surface-bound humic acid increased rhodamine B adsorption on nanosized hydroxyapatite

Wang

et al. 2016

Journal of Dispersion Science and Technology

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In this study, humic acid-bound nanosized hydroxyapatite (HA-nHAP) was developed as a novel adsorbent, and the potential of using HA-nHAP for the adsorption of Rhodamine B (RhB) from aqueous solution as functions of pH, adsorbent dosage, contact time, ionic strength and temperature was investigated. The results indicated that the HA binding significantly increased the adsorption of RhB due to the introduction of abundant negatively charged functional groups. The adsorption capacity of HA-nHAP for RhB was found to be pH-dependent, and the optimal pH value was found to be 6.0. The adsorption equilibrium data obeyed Sips and Freundlich isotherms and the kinetic data were well described by the Elovich kinetic model. According to the Sips equation, the maximum adsorption capacity for RhB was 24.12 mg/g. Temperature and ionic strength experiment Downloaded by [University of Sussex Library] at 15:15 18 May 2016 2showed that they both had effect on the adsorption capacity of HA-nHAP. Thermodynamic study confirmed that the adsorption was a spontaneous, endothermic and more random arrangement process. The present investigation showed that HA-nHAP is a promising adsorbent for the removal of RhB from aqueous solution.

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“…Hidroksiapatit toksik olmaması, düşük çözünürlüğü ve stabil olması gibi özelliklerinde dolayı metal ve renk adsorpsiyonunda yaygın olarak kullanılmaktadır [6,7]. Yapılan çalışmalarda, hidroksiapatit veya katkılı hidroksiapatit kullanılarak adsorpsiyon prosesi ile renk gideriminde olumlu sonuçlar alınmıştır [6][7][8][9][10].…”

Section: Introductionunclassified

Ali̇zari̇n Kirmizi Boyasinin Hi̇droksi̇apati̇t Kullanilarak Adsorpsi̇yon Prosesi̇ İle Gi̇deri̇mi̇

Çifçi

2018

Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi

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ÖZBu çalışmada, hidroksiapatit ile alizarin kırmızı boyasının adsorpsiyon prosesiyle giderimi araştırılmıştır. Çalışmada çalkalama hızının, çözelti pH değerinin, hidroksiapatit miktarının ve başlangıç boya konsantrasyonun giderim verimi üzerine etkisi ortaya konmuştur. Alizarin kırmızı boyasının hidroksiapatit ile adsorpsiyonu yalancı ikinci dereceden kinetik modele ve Freundlich izoterm modeline daha uygun olduğu görülmüştür. Maksimum adsorpsiyon kapasitesi pH 7'de, 1 g/L hidroksiapatit ile 150 dakika adsorpsiyon sonucunda 144,9 mg/g olarak elde edilmiştir. Sonuç olarak, hidroksiapatitin alizarin kırmızı boyası gibi anyonik boyaların gideriminde alternatif bir adsorbent olarak kullanılabileceği düşünülmektedir.Anahtar Kelimeler: Adsorpsiyon, alizarin kırmızı boyası, anyonik boya, hidroksiapatit, renk giderimi REMOVAL OF ALIZARIN RED DYE USING HYDROXYAPATITE BY ADSORPTION PROCESS ABSTRACTIn this study, the removal of alizarin red dye by hydroxyapatite was investigated with the adsorption process. The effects of shaking speed, pH, hydroxyapatite dose and the initial dye concentration were studied on the removal of dye. The adsorption of alizarin red dye using hydroxyapatite was found to be more appropriate to the pseudo second order kinetic model and the Freundlich isotherm model. The maximum adsorption capacity was obtained as 144.9 mg/g at pH 7 and 1 g/L hydroxyapatite after 150 minutes adsorption. As a result, it is thought that hydroxyapatite can be used as an alternative adsorbent to remove the anionic dyes such as alizarin red dye.

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Adsorption of direct yellow 27 from water by poorly crystalline hydroxyapatite prepared via precipitation method

Cited by 22 publications

References 47 publications

Removal of Methylene Blue from Water Using Hydroxyapatite Submitted to Microwave Irradiation

Removal of Methylene Blue from Water Using Hydroxyapatite Submitted to Microwave Irradiation

Surface-bound humic acid increased rhodamine B adsorption on nanosized hydroxyapatite

Ali̇zari̇n Kirmizi Boyasinin Hi̇droksi̇apati̇t Kullanilarak Adsorpsi̇yon Prosesi̇ İle Gi̇deri̇mi̇

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