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<p>Copper sulfate pentahydrate (CuSO₄·5&#xa0;H₂O) serves as both a classic model system for solid-state dehydration kinetics and a versatile component in sustainable engineering. This review synthesizes four decades of research to clarify the complex, multi-step dehydration pathway of CuSO₄·5&#xa0;H₂O, analyzing the factors such as water vapor pressure and particle morphology that govern the reported mechanisms for water loss. The analysis reconciles a wide range of reported activation energies (70–165&#xa0;kJ mol⁻¹) and provides a consolidated kinetic framework that links experimental conditions to dominant mechanistic steps. Beyond fundamental chemistry, the review systematically correlates the compound’s inherent properties including reversible hydration, color change cycle, and Lewis acidity with its performance in applied systems. These applications are critically evaluated and compared, spanning humidity sensors, water scavengers for chemical synthesis, electrochemical copper recovery from waste streams, and agrochemicals. The assessment extends to process engineering innovations, such as microwave-assisted synthesis and fluidized-bed reactors, highlighting quantified benefits in energy efficiency and reaction yield. The work also addresses the critical constraints of copper ecotoxicity and resource sustainability. It proposes a prioritized research agenda focused on mitigating environmental impact through smart-release formulations, advancing circular economy models via selective urban mining, and enabling predictive process control through integrated kinetic and transport modeling. By connecting molecular behavior to system-level engineering, this review aims to guide the development of CuSO₄·5&#xa0;H₂O as a functional material within circular and sustainable technological frameworks.</p>

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Copper sulfate pentahydrate from molecular mechanisms to sustainable engineering applications

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年3月17日

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  • Ahmed Abd zaid

摘要

Copper sulfate pentahydrate (CuSO₄·5 H₂O) serves as both a classic model system for solid-state dehydration kinetics and a versatile component in sustainable engineering. This review synthesizes four decades of research to clarify the complex, multi-step dehydration pathway of CuSO₄·5 H₂O, analyzing the factors such as water vapor pressure and particle morphology that govern the reported mechanisms for water loss. The analysis reconciles a wide range of reported activation energies (70–165 kJ mol⁻¹) and provides a consolidated kinetic framework that links experimental conditions to dominant mechanistic steps. Beyond fundamental chemistry, the review systematically correlates the compound’s inherent properties including reversible hydration, color change cycle, and Lewis acidity with its performance in applied systems. These applications are critically evaluated and compared, spanning humidity sensors, water scavengers for chemical synthesis, electrochemical copper recovery from waste streams, and agrochemicals. The assessment extends to process engineering innovations, such as microwave-assisted synthesis and fluidized-bed reactors, highlighting quantified benefits in energy efficiency and reaction yield. The work also addresses the critical constraints of copper ecotoxicity and resource sustainability. It proposes a prioritized research agenda focused on mitigating environmental impact through smart-release formulations, advancing circular economy models via selective urban mining, and enabling predictive process control through integrated kinetic and transport modeling. By connecting molecular behavior to system-level engineering, this review aims to guide the development of CuSO₄·5 H₂O as a functional material within circular and sustainable technological frameworks.