Magnesium sulphate is commonly present in industrial wastes due to Mg’s presence in the structure of various minerals and the fact that sulphuric acid leaching is widely used. MgO appears as a possible pH neutralizing agent that can be obtained by decomposition of MgSO₄. However, at 1500 K, the temperature where this decomposition occurs, the oxide formed cannot be used for this purpose. The thermodynamic study suggests that in the presence of reducing agents, such as carbon, decreasing the decomposition temperature makes the formed oxide viable for this use. The objective of the work is an evaluation of the behaviour of the reaction system constituted by MgSO₄ and charcoal. The study also contemplates the obtained materials characterization to verify the MgO formation and evaluating how the properties of the material are suitable for its use as a pH regulator. Thus, in addition to the scanning and X-ray diffraction electron microscopy techniques, the quantification of the reactivity of the product in acid solutions is also expected. The analysis performed with the variables of excess reducing agent and temperature showed that temperature is the variable that most influences the decomposition of MgSO₄. The experiments at 1173 K and 20, 25 and 30 min were the ones that indicated the best experimental results of conversion, reaching a conversion close to 100%. The characterization analysis, in XRD and SEM/EDS, indicated that MgO was formed at the end of the reaction. Reactivity test indicates that the obtained MgO can be used as a pH regulator.

硫酸镁通常存在于工业废料中，这是由于镁在各种矿物结构中的存在以及广泛使用硫酸浸出这一事实。MgO似乎是可能的pH中和剂，可以通过MgSO ₄分解获得。但是，在1500 K（发生分解的温度）下，形成的氧化物不能用于此目的。热力学研究表明，在存在还原剂（如碳）的情况下，降低分解温度可使形成的氧化物可用于该用途。该工作的目的是评估由MgSO ₄组成的反应体系的行为。和木炭。该研究还考虑了获得的材料特性，以验证MgO的形成并评估材料的性能如何适合用作pH调节剂。因此，除了扫描和X射线衍射电子显微镜技术之外，还期望对产物在酸性溶液中的反应性进行定量。对过量还原剂和温度的变量进行的分析表明，温度是最影响MgSO ₄分解的变量。在1173 K和20、25和30分钟的实验表明转化率的最佳实验结果，转化率接近100％。在XRD和SEM / EDS中的表征分析表明，MgO在反应结束时形成。反应性测试表明，所获得的MgO可以用作pH调节剂。