Efficiency and sustainability for removing organic pollutants in aqueous solution: An innovative composite material

doi:10.1016/j.cjche.2025.07.008

中国化学工程学报 ›› 2025, Vol. 88 ›› Issue (12): 367-378.DOI: 10.1016/j.cjche.2025.07.008

Efficiency and sustainability for removing organic pollutants in aqueous solution: An innovative composite material

Bouba Talami^1,2,3, Sali Mouhamadou^1,2,3, Sadou Dalhatou², Pierre Bonnet⁴, Christophe Caperaa⁴, Hicham Zeghioud^1,5, Harouna Massai³, Abdoulaye Kane¹

1. UniLaSalle-École des Métiers de l'Environnement, Cyclann, Rennes, 35170 Bruz, France;
2. Department of Chemistry, Faculty of Science, University of Maroua, 814 Maroua, Cameroon;
3. Department of Chemistry, Faculty of Science, University of Garoua, PO.BOX 342 Garoua, Cameroon;
4. Institut de Chimie de Clermont-Ferrand, Université Clermont Auvergne, UMR 6296, BP 10448, F-63000 Clermont-Ferrand, France;
5. Laboratory Division, Exploration and Production Activity, Sonatrach, 1st Novembre Street, Boumerdes 35000, Algeria

收稿日期:2025-04-21 修回日期:2025-07-15 接受日期:2025-07-16 出版日期:2026-02-09 发布日期:2025-08-18
通讯作者: Bouba Talami,E-mail:kodetefils@gmail.com;Sadou Dalhatou,E-mail:dalsaous@yahoo.fr
基金资助:
The authors would like to thank Ivane LELIEVRE (UniLaSalle Rennes) for their technical help. Authors also thanks Lawrence FREZET from “ICCF” for BET measurements. The authors would also like to acknowledge the Erasmus+ International Credit Mobility for the Grant (2019-1-FR01-KA107-060920) between UniLaSalle Polytechnic Institute and University of Maroua.

Efficiency and sustainability for removing organic pollutants in aqueous solution: An innovative composite material

Bouba Talami^1,2,3, Sali Mouhamadou^1,2,3, Sadou Dalhatou², Pierre Bonnet⁴, Christophe Caperaa⁴, Hicham Zeghioud^1,5, Harouna Massai³, Abdoulaye Kane¹

1. UniLaSalle-École des Métiers de l'Environnement, Cyclann, Rennes, 35170 Bruz, France;
2. Department of Chemistry, Faculty of Science, University of Maroua, 814 Maroua, Cameroon;
3. Department of Chemistry, Faculty of Science, University of Garoua, PO.BOX 342 Garoua, Cameroon;
4. Institut de Chimie de Clermont-Ferrand, Université Clermont Auvergne, UMR 6296, BP 10448, F-63000 Clermont-Ferrand, France;
5. Laboratory Division, Exploration and Production Activity, Sonatrach, 1st Novembre Street, Boumerdes 35000, Algeria

Received:2025-04-21 Revised:2025-07-15 Accepted:2025-07-16 Online:2026-02-09 Published:2025-08-18
Contact: Bouba Talami,E-mail:kodetefils@gmail.com;Sadou Dalhatou,E-mail:dalsaous@yahoo.fr
Supported by:
The authors would like to thank Ivane LELIEVRE (UniLaSalle Rennes) for their technical help. Authors also thanks Lawrence FREZET from “ICCF” for BET measurements. The authors would also like to acknowledge the Erasmus+ International Credit Mobility for the Grant (2019-1-FR01-KA107-060920) between UniLaSalle Polytechnic Institute and University of Maroua.

摘要/Abstract

摘要： Composite materials are attracting considerable interest in water treatment due to their specific properties. Given these properties and the need to remove dyes from water, this work aims to develop an innovative composite material based on local clay (abundant and inexpensive), TiO₂ and CuO for wastewater treatment application. Although much work has been devoted to the design of clay-based composites, to our knowledge, no study has explored the use of Boula-Ibib clay decorated with TiO₂ and CuO to adsorb tartrazine (TTRZ) in aqueous solution. The CuO-TiO₂-clay composite was synthesized by incorporating TiO₂ and CuO on the clay surface using the sol-gel method. The crystalline properties, morphology and specific surface area of the composite were examined by X-ray diffraction, X-ray fluorescence, scanning electron microscopy and the Brunauer-Emmett-Teller method respectively. As results, the specific surface area of 85.23 m²·g^-1 was obtained for the CuO-TiO₂-clay which is higher than that of the raw clay (53.84 m²·g^-1). The results of adsorption studies showed a TTRZ uptake capacity of 16.08 mg·g^-1 after 30 min, with a concentration of 50 mg·L^-1, at pH 6.4 with the optimal composite mass of 0.01 g. Kinetic and isothermal studies showed that adsorption obeyed the pseudo-second-order model and the Radke-Prausnitz isotherm. Thermodynamic studies revealed that the adsorption of TTRZ by the composite is an exothermic, non-spontaneous process that leads to a reduction of disorder in the system. It was established that CuO-TiO₂-clay could be effectively reused over four cycles without damage of its structure which represent an economic advantage.

关键词: Adsorption, Clay, Composite, Kinetic, Synthesis, Tartrazine

Abstract: Composite materials are attracting considerable interest in water treatment due to their specific properties. Given these properties and the need to remove dyes from water, this work aims to develop an innovative composite material based on local clay (abundant and inexpensive), TiO₂ and CuO for wastewater treatment application. Although much work has been devoted to the design of clay-based composites, to our knowledge, no study has explored the use of Boula-Ibib clay decorated with TiO₂ and CuO to adsorb tartrazine (TTRZ) in aqueous solution. The CuO-TiO₂-clay composite was synthesized by incorporating TiO₂ and CuO on the clay surface using the sol-gel method. The crystalline properties, morphology and specific surface area of the composite were examined by X-ray diffraction, X-ray fluorescence, scanning electron microscopy and the Brunauer-Emmett-Teller method respectively. As results, the specific surface area of 85.23 m²·g^-1 was obtained for the CuO-TiO₂-clay which is higher than that of the raw clay (53.84 m²·g^-1). The results of adsorption studies showed a TTRZ uptake capacity of 16.08 mg·g^-1 after 30 min, with a concentration of 50 mg·L^-1, at pH 6.4 with the optimal composite mass of 0.01 g. Kinetic and isothermal studies showed that adsorption obeyed the pseudo-second-order model and the Radke-Prausnitz isotherm. Thermodynamic studies revealed that the adsorption of TTRZ by the composite is an exothermic, non-spontaneous process that leads to a reduction of disorder in the system. It was established that CuO-TiO₂-clay could be effectively reused over four cycles without damage of its structure which represent an economic advantage.

Key words: Adsorption, Clay, Composite, Kinetic, Synthesis, Tartrazine

Bouba Talami, Sali Mouhamadou, Sadou Dalhatou, Pierre Bonnet, Christophe Caperaa, Hicham Zeghioud, Harouna Massai, Abdoulaye Kane. Efficiency and sustainability for removing organic pollutants in aqueous solution: An innovative composite material[J]. 中国化学工程学报, 2025, 88(12): 367-378.

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Efficiency and sustainability for removing organic pollutants in aqueous solution: An innovative composite material

Efficiency and sustainability for removing organic pollutants in aqueous solution: An innovative composite material

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