This paper addresses the analysis of hydrothermal carbonization of Tetra Pak residues using diluted sulfuric acid to obtain hydrochars for cleaning water polluted by heavy metal ions. The hydrochar samples were prepared under different carbonization conditions, and a detailed study of their composition, textural parameters, and surface functionalities was performed. It was found that the hydrothermal carbonization and dwell time of the Tetra Pak wastes significantly affected the composition of the hydrochars. These hydrochar samples contained oxygenated functional groups and aluminum-silicon moieties that were responsible for the Pb²⁺, Zn²⁺, and Hg²⁺ adsorption. The removal of these heavy metal ions using Tetra Pak hydrochars was an endothermic and multi-ionic process. Hydrothermal carbonization is a promising approach to improve Tetra Pak waste management, generating materials with interesting properties for addressing the problem of wastewater and industrial effluent depollution.

中文翻译：

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利乐基水炭的制备用于净化重金属离子污染的水：理化性质及去除机理

本文介绍了使用稀硫酸对利乐残留物进行水热碳化的分析，以获得用于净化重金属离子污染水的水炭。在不同的碳化条件下制备水炭样品，并对它们的组成、结构参数和表面功能进行了详细研究。研究发现，利乐废物的热液碳化和停留时间显着影响水热炭的组成。这些水炭样品含有氧化官能团和铝硅部分，这些部分导致了 Pb ²⁺、Zn ²⁺和 Hg ²⁺吸附。使用利乐水炭去除这些重金属离子是一个吸热和多离子过程。水热碳化是改善利乐废物管理的一种有前景的方法，可产生具有有趣特性的材料，用于解决废水和工业废水净化问题。