Abstract The purpose of this study was to recover mercury and reuse active coke in the field of active coke adsorption of Hg0. The powdered active coke (AC) with high adsorption performance of Hg0 was prepared by a simple way. The regeneration characteristics of AC as a Hg0 sorbent were also investigated using microwave (MG-AC) and thermal methods (TG-AC). Of the two regeneration methods, microwave heating exhibited a faster heating rate to achieve complete regeneration. Following regeneration, adsorption performance of regenerated AC increased due to AC reactivation by microwave. Brunauer-Emmett-Teller (BET) measurements, X-ray photoelectron spectroscopy (XPS), and Laser particle size analyzer were used to analyze surface physical and chemical properties as well as particle size distribution of the samples. The results indicated that regeneration could greatly influence properties of AC, such as specific surface area, pore structure, surface chemical functional groups, and average particle size. Thermal methods had higher desorption content (CO2, CO and NO) than microwave methods. Hence, microwave regeneration had a smaller carbon consumption of 0.12% compared to thermal methods (0.23%). The Hg0 that desorbed from AC was collected using the deep adsorption technique in order to avoid secondary pollution.

中文翻译：

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微波和热法去除元素汞的活性焦再生性能

摘要 本研究的目的是在Hg0.0的活性焦吸附领域中回收汞并回用活性焦。通过简单的方法制备了对Hg0具有高吸附性能的粉状活性焦（AC）。还使用微波 (MG-AC) 和热法 (TG-AC) 研究了活性炭作为 Hg0 吸附剂的再生特性。在这两种再生方法中，微波加热表现出更快的加热速度以实现完全再生。再生后，再生活性炭的吸附性能由于微波再活化而增加。Brunauer-Emmett-Teller (BET) 测量、X 射线光电子能谱 (XPS) 和激光粒度分析仪用于分析样品的表面物理和化学性质以及粒度分布。结果表明，再生对活性炭的比表面积、孔结构、表面化学官能团和平均粒径等性质有很大影响。热法比微波法具有更高的解吸含量（CO2、CO 和 NO）。因此，与热方法 (0.23%) 相比，微波再生的碳消耗量更小，仅为 0.12%。从活性炭中解吸出来的 Hg0 采用深度吸附技术收集，以避免二次污染。