Removal of Eriochrome Black T dye from aqueous solutions by using nano-crystalline calcium phosphate tricalcic apatitic

IF 2.4 Q3 CHEMISTRY, MULTIDISCIPLINARY Moroccan Journal of Chemistry Pub Date : 2021-11-02 DOI:10.48317/IMIST.PRSM/MORJCHEM-V9I3.26577

Jihane Kouar, Touria Ould Bellahcen, A. Elamrani, A. Chérif, N. Kamil

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引用次数: 2

Abstract

Calcium phosphate tricalcic apatitic (CaPT-Ap) was synthesized by co-precipitation at low temperature and basic medium. The potential of CaPT-Ap as an adsorbent was investigated in a batch reactor under different experimental conditions for removing dye Eriochrome Black T (EBT) from aqueous solutions. The used adsorbent was characterized by X-ray diffraction (XRD), infrared spectroscopy (FTIR) and chemical analysis indicate that this calcium phosphate is a CaPT-Ap. The effect of particle sizes , mass of the adsorbent, contact time ,temperature and the concentration of the dye on the adsorption were determined. The kinetic study showed that the pseudo-second-order model gives a better description of the kinetics of the adsorption reaction than the pseudo-first-order model. Analysis of adsorption isotherms showed that adsorption governed by the isotherms of Freundlich. Thermodynamic parameters such as ΔG°, ΔS° and ΔH° were calculated. It was found that EBT dye adsorption was spontaneous and endothermic.

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纳米晶磷酸钙三钙型磷灰石去除水溶液中铬黑T染料

采用低温碱性共沉淀法合成了三钙磷酸钙磷灰石(CaPT-Ap)。在间歇式反应器中，考察了cap - ap作为吸附剂在不同实验条件下对染料EBT的去除率。用x射线衍射(XRD)、红外光谱(FTIR)和化学分析对所制备的吸附剂进行了表征，表明所制备的磷酸钙为CaPT-Ap。考察了吸附剂的粒径、质量、接触时间、温度和染料浓度等因素对吸附性能的影响。动力学研究表明，拟二阶模型比拟一阶模型能更好地描述吸附反应的动力学。吸附等温线分析表明，吸附受Freundlich等温线支配。计算了ΔG°、ΔS°和ΔH°等热力学参数。发现EBT对染料的吸附是自发的、吸热的。

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来源期刊

Moroccan Journal of Chemistry CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

3.40

自引率

9.10%

发文量