In this study, cigarette butts (CB) waste was pyrolyzed over a wide temperature range (400–700 °C) using Pyro/GC–MS and slow pyrolysis experiments. The feedstock and char products were extensively investigated using TGA, elemental analysis, surface area and porosity analysis, SEM-EDS, XRD, and FT-IR, and subsequently tested for their ability to remove Ni (II) and Cu (II) from aqueous solutions. The Pyro/GC–MS analysis revealed the presence of several useful compounds including acids, esters and hydrocarbons. Char yields ranged from 26.6 to 20.1 wt%, and carbon contents varied from 65.3 to 60.8 wt%. The chars produced at medium temperatures (500-600 °C) were highly porous, with a specific surface area of 272.9–270.8 m²/g. The heavy metal adsorption studies revealed that CB 500 °C had the highest adsorption capacity of 13.8 mg/g with 53.4 % nickel removal, while CB 600 °C had the highest adsorption capacity of 23.4 mg/g with 94.7 % copper removal.

中文翻译：

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通过热解可持续地评估烟头废料的价值：深入了解热解产物和随后通过热解炭去除水性重金属


在本研究中，使用 Pyro/GC-MS 和慢速热解实验在较宽的温度范围 （400–700 °C） 内热解烟头 （CB） 废物。使用 TGA、元素分析、表面积和孔隙率分析、SEM-EDS、XRD 和 FT-IR 对原料和焦炭产品进行了广泛研究，随后测试了它们从水溶液中去除 Ni （II） 和 Cu （II） 的能力。Pyro/GC-MS 分析揭示了几种有用的化合物，包括酸、酯和碳氢化合物。炭化物产量从 26.6 到 20.1 wt% 不等，碳含量从 65.3 到 60.8 wt% 不等。在中等温度 （500-600 °C） 下生产的焦炭具有高度多孔性，比表面积为 272.9–270.8 m²/g。重金属吸附研究表明，CB 500 °C 的吸附容量最高，为 13.8 mg/g，镍去除率为 53.4%，而 CB 600 °C 的吸附容量最高，为 23.4 mg/g，铜去除率为 94.7%。