Performances of Cu-Zn hydroxyacetate double salts adsorbent for the removal of different kinds of anionic dyes: Modeling of adsorption isotherms and adsorption kinetics

IF 2.3 4区环境科学与生态学 Q3 ENGINEERING, CHEMICAL

Environmental Progress & Sustainable Energy Pub Date : 2025-07-05 DOI:10.1002/ep.70033

Hassiba Bessaha, Hakim Aguedal, Kheira El Akeb, Mohamed Bouraada, Bruno Azambre

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Abstract

A layered Cu-Zn hydroxyacetate double salt (CuZnAc) was synthesized from ZnO and Cu(CH₃COO)₂ and tested for adsorption of anionic dyes (Evans Blue, Yellow Thiazole, Indigo Carmine, Brilliant Blue R) with varying charges. X-ray diffraction, Fourier-transform infrared spectroscopy, and thermogravimetric analysis confirmed the layered structure. Adsorption was pH-independent (5–9.5) and highly dependent on dye structure, with capacities of 727.40 (EB), 746.00 (YT), 204.47 (IC), and 105.95 (BBR) mg g⁻¹. Isotherm data fitted best to Sips/Toth (EB), Sips (IC), and Redlich-Peterson (YT, BBR) models, while kinetics followed pseudo-first order (EB, YT, BBR) and pseudo-second order (IC). Thermodynamics revealed spontaneous, endothermic adsorption with increased interfacial randomness. The material retained 58%–65% efficiency after five regeneration cycles. CuZnAc shows promise for removing diverse anionic dyes from wastewater.

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Cu-Zn羟基乙酸双盐吸附剂对不同阴离子染料的吸附性能：吸附等温线和吸附动力学建模

以ZnO和Cu(CH3COO)2为原料合成了层状Cu- zn羟基乙酸双盐（CuZnAc），并对不同电荷的阴离子染料（Evans Blue、Yellow Thiazole、Indigo Carmine、Brilliant Blue R）进行了吸附实验。x射线衍射，傅里叶变换红外光谱和热重分析证实了层状结构。吸附与ph无关（5-9.5），高度依赖于染料结构，吸附量分别为727.40 （EB）、746.00 （YT）、204.47 （IC）和105.95 (BBR) mg g−1。等温线数据最适合于Sips/Toth （EB）、Sips （IC）和Redlich-Peterson （YT， BBR）模型，而动力学则符合准一阶（EB， YT， BBR）和准二阶（IC）模型。热力学显示自发吸热吸附，界面随机性增加。经过5次再生循环后，材料的效率保持在58% ~ 65%之间。CuZnAc有望从废水中去除各种阴离子染料。

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来源期刊

Environmental Progress & Sustainable Energy 环境科学-工程：化工

CiteScore

5.00

自引率

3.60%

发文量

231

审稿时长

4.3 months

期刊介绍： Environmental Progress , a quarterly publication of the American Institute of Chemical Engineers, reports on critical issues like remediation and treatment of solid or aqueous wastes, air pollution, sustainability, and sustainable energy. Each issue helps chemical engineers (and those in related fields) stay on top of technological advances in all areas associated with the environment through feature articles, updates, book and software reviews, and editorials.