Removal of Reactive Blue 204 Dye from Aqueous Solutions by Adsorption Onto Nanohydroxyapatite

Ciobanu, Gabriela; Ilisei, Simona; Harja, Maria; Luca, Constantin

doi:10.1166/sam.2013.1558

Cited by 23 publications

(13 citation statements)

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“…The pure hydroxyapatite powder was prepared by mixing appropriate amounts of Ca(OH)2 (0.1 M) and H3PO4 (0.1 M) aqueous solutions to achieve predetermined Ca/P atomic ratio of 1.67 [13]. The suspension obtained was aged for 3 h and then filtered and washed with ethanol and triply distilled water.…”

Section: Materials and Synthesizing Methodsmentioning

confidence: 99%

The Bi-Substituted Hydroxyapatite as Radio-Opaque Material

Ciobanu¹,

Bargan²,

Luca³

et al. 2016

RadJ

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Abstract. This study relates to a new apatite material which is biocompatible and exhibits radio-opacity, enhancing its utility in the dental and medical fields. The bismuth-substituted hydroxyapatite was obtained by means of wet chemical method, that is, by co-precipitation reactions. The effects of the bismuth substitution for calcium on the morphology and optical proprieties of the resulting powder were investigated by scanning electron microscopy (SEM) coupled with X-ray analysis (EDX), X-ray powder diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Bi-substituted hydroxyapatite is radio-opaque, and it can be detected by X-rays and computed tomography.

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Section: Materials and Synthesizing Methodsmentioning

confidence: 99%

The Bi-Substituted Hydroxyapatite as Radio-Opaque Material

Ciobanu¹,

Bargan²,

Luca³

et al. 2016

RadJ

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“…The HAp is expected to be a promising adsorbent due to its specifi c structure conferring ionic exchange property and adsorption affi nity towards many polluting substances (Elliott 1994). In recent years, some applications of the HAp in adsorption of heavy metal ions, dyes and other organic compounds have been investigated and the results showed that the HAp shows attractive adsorption abilities (Lin et al 2009, Ciobanu et al 2009, Ciobanu et al 2013, Ciobanu et al 2014. Although some concerns have been focused on the Reactive Blue 19 adsorption on several adsorbents (Xue et al 2009, Madrakian et al 2012, no such data have been reported for HAp as adsorbent until now.…”

Section: Introductionmentioning

confidence: 99%

Kinetic and equilibrium studies on adsorption of Reactive Blue 19 dye from aqueous solutions by nanohydroxyapatite adsorbent

Ciobanu

Barna

Harja

2016

Archives of Environmental Protection

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Abstract:In the present study the adsorption of Reactive Blue 19 dye on the hydroxyapatite (HAp) nanopowders was investigated. The batch adsorption experiments were performed by monitoring the adsorbent dosage, contact time, dye solution concentration, pH and temperature. At pH 3 and 20ºC, high dye removal rates of about 95.58% and 86.95% for the uncalcined and calcined nanohydroxyapatites, respectively, were obtained. The kinetic studies indicated the dye adsorption onto nanohydroxyapatite samples to follow a pseudo-second order model. The Langmuir isotherm was found to be the best to represent the equilibrium with experimental data. The maximum adsorption capacity of uncalcined and calcined nanohydroxyapatite samples has been found to be 90.09 mg/g and 74.97 mg/g, respectively.

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“…The environmental pollution has reached at an alarming level with the revolution of scientific and technological disciplines, research areas and industries [1][2][3][4][5][6][7][8]. The release of organic pollutants, such as dyes, drugs, saturated hydrocarbons, aromatic compounds, polymers, insecticides, pesticides, etc., in the water resources are posing a great nuisance to the surroundings due to their carcinogenic, mutagenic and toxic effects.…”

Section: Introductionmentioning

confidence: 99%