在450℃的限氧条件下热解一种高风险的入侵植物马缨丹，成功合成了一种生物炭材料（LCB）。通过批量吸附实验探究了pH、吸附剂投加量和初始浓度等因素对LCB吸附重金属Pb²⁺的影响，并评估了LCB去除铅离子的有效性，利用SEM和EDS等对LCB的相关结构与性质进行表征。结果表明，马缨丹在制备生物炭过程中形成了丰富的孔径结构，且能有效去除水溶液中的Pb²⁺。通过Langmuir模型和拟二级动力学方程描述生物炭对铅的吸附行为，结果表明，吸附主要发生在单分子层，理论最大吸附量为75.74 mg/g，化学吸附是此过程的主要限速吸附机制。

LCB,a new type of biochar material,is successfully synthesized by pyrolyzing Lantana,a high-risk invasive plant under an oxygen-limiting condition at 450℃.Through batch adsorption experiments,the effects of pH,adsorbent dosage and initial concentration on the adsorption of Pb²⁺ by LCB is studied.The effectiveness of LCB in removing Pb²⁺ is evaluated,and the structure and properties of LCB is analyzed by SEM and EDS.It is shown that during the preparation of biochar,Lantana forms rich pores structure and can effectively remove Pb²⁺ from solutions.Langmuir model and pseudo-second-order kinetic equation can better describe the adsorption behavior of biochar to Pb²⁺,indicating that the adsorption mainly occurs in the monolayer.The theoretical maximum adsorption capacity is 75.74 mg·g^-1,and chemical adsorption is the main rate-limiting adsorption mechanism in this process.

张杰(1998-),女,硕士研究生,研究方向为生物资源与利用,1552764118@qq.com