This study aimed to transform tobacco from illegal cigarettes into high-efficiency and low-cost adsorbents, and test them in the remediation of lead-contaminated water resources. Biochar and activated carbon were produced by thermal activation technique (originated material CT Biochar) and by thermal, chemical and physical activation techniques (originated material CT ZnCl₂ + CO₂). Firstly, the materials were characterized by chemical analysis (pH_PZC, SEM, FT-IR, BET and BJH). After this, they were submitted to adsorption tests, and to studies aiming the reuse of the adsorbents. The tobacco adsorbents have a surface with tubular structure and spongy aspects, surface functional groups such as alkane, aldehyde, hydroxyl, carboxylic acid, carbonate, alcohol and ether. CT Biochar has a surface area of ​​83.60 m² g⁻¹ and CT ZnCl₂ + CO₂ of 46.97 m² g⁻¹. The optimal Pb²⁺ adsorption conditions are: solution at pH 5.0, adsorbent dose of 4 g L⁻¹, and time to reach equilibrium of 45 min (CT Biochar) and 10 min (CT ZnCl₂ + CO₂). The best adjustments were found for pseudo-second order and Langmuir. It was observed that adsorption of Pb²⁺ occurs in monolayer, and it is predominantly chemical. Estimates regarding costs showed that the production of CT ZnCl₂ + CO₂ is 0.412 US$ Kg⁻¹, and for CT Biochar is 0.243 US$ Kg⁻¹. Finally, this study provides support for future studies using activated carbons and biochar in remediation of different contaminants, including the use of the adsorbents in larger scales of application, such as wastewater treatment plants.

这项研究旨在将烟草从非法卷烟转变为高效，低成本的吸附剂，并对其进行铅污染水资源的修复进行测试。生物炭和活性炭通过热活化技术（起源材料CT Biochar）和热，化学和物理活化技术（起源材料CT ZnCl ₂ + CO ₂）生产。首先，通过化学分析（pH _PZC）对材料进行表征，SEM，FT-IR，BET和BJH）。此后，他们接受了吸附测试，并进行了旨在重新利用吸附剂的研究。烟草吸附剂的表面具有管状结构和海绵状特征，表面官能团例如烷烃，醛，羟基，羧酸，碳酸根，醇和醚。CT Biochar的表面积为83.60 m ² g ^-1，CT ZnCl ₂ + CO ₂为46.97 m ² g ^-1。最佳的Pb ²⁺吸附条件为：溶液的pH值为5.0，吸附剂量为4 g L ^-1，达到平衡的时间为45分钟（CT Biochar）和10分钟（CT ZnCl ₂ + CO _2））。对于伪二阶和Langmuir，找到了最佳的调整。观察到Pb ^2+的吸附发生在单层中，并且主要是化学反应。有关成本的估算表明，CT ZnCl ₂ + CO ₂的产量为0.412 US $ Kg ^-1，而CT Biochar的产量为0.243 US $ Kg ^-1。最后，这项研究为使用活性炭和生物炭修复不同污染物的未来研究提供了支持，包括在更大规模的应用中使用吸附剂，例如废水处理厂。