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<p>The objective of this study is to produce porous, sustainable ceramic adsorptive aggregates for the improvement of water quality and water treatment applications. Three types of clay, Natural Zeolite (NZ), and Spent Coffee Grounds (SCG) are used in the synthesis of aggregates with high adsorptive capacities. Various characterizations are conducted, encompassing measurements of bulk density, Specific Surface Area (SSA), total porosity, and Scanning Electron Microscopy (SEM) analysis. Additionally, the study examines the influence of initial pH, reaction time, and initial zinc concentration on adsorption performance. The experimental findings indicate that the bulk density ranges between 0.5 and 0.71&#xa0;g/cm<sup>3</sup>, while the total porosity varies from 44 to 62%. In batch adsorption experiments, the kinetics are best described by a pseudo-second-order (PSO) model. Furthermore, the Redlich-Peterson and Freundlich isotherm models offer a more accurate representation of the adsorption data when compared to the Langmuir model. The quantity of adsorbed material ranges from 14 to 30.5&#xa0;mg/g and is significantly influenced by physicochemical and mineralogical properties. In conclusion, this research contributes a viable approach for the recovery and recycling of various materials, transforming them into Ceramic Adsorptive Aggregates (CAA). These aggregates present a cost-effective, efficient, and environmentally friendly adsorption medium.</p> Graphical Abstract <p></p>

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Development of a New Low-Firing Ceramic Based on Micronized Clay and Coffee Grounds: Application for the Depollution of Wastewater

  • 期刊论文

  • 发表日期：

    2025年3月7日

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  • Khawla Boussai,
  • Walid Maherzi,
  • Selma Bellara,
  • Ahmed Senouci,
  • Mohamed Mosbahi,
  • Mahmoud Khlifi,
  • Nor-Edine Abriak,
  • Noureddine Hamdi

摘要

The objective of this study is to produce porous, sustainable ceramic adsorptive aggregates for the improvement of water quality and water treatment applications. Three types of clay, Natural Zeolite (NZ), and Spent Coffee Grounds (SCG) are used in the synthesis of aggregates with high adsorptive capacities. Various characterizations are conducted, encompassing measurements of bulk density, Specific Surface Area (SSA), total porosity, and Scanning Electron Microscopy (SEM) analysis. Additionally, the study examines the influence of initial pH, reaction time, and initial zinc concentration on adsorption performance. The experimental findings indicate that the bulk density ranges between 0.5 and 0.71 g/cm3, while the total porosity varies from 44 to 62%. In batch adsorption experiments, the kinetics are best described by a pseudo-second-order (PSO) model. Furthermore, the Redlich-Peterson and Freundlich isotherm models offer a more accurate representation of the adsorption data when compared to the Langmuir model. The quantity of adsorbed material ranges from 14 to 30.5 mg/g and is significantly influenced by physicochemical and mineralogical properties. In conclusion, this research contributes a viable approach for the recovery and recycling of various materials, transforming them into Ceramic Adsorptive Aggregates (CAA). These aggregates present a cost-effective, efficient, and environmentally friendly adsorption medium.

Graphical Abstract