The purpose of this study was to remove lead and arsenic ions from aqueous solutions using the activated carbon prepared from Citrus limon tree leaves. Characteristics of the prepared adsorbent were studied thoroughly using BET, SEM, EDS and mapping, XRD, and RAMAN analyses. The results of experiments showed that the highest adsorption efficiencies were 97.67% and 95.89% for Pb (II) and As (III), respectively. Additionally, the adsorbent was successfully regenerated four times and therefore it was able to perform the adsorption and desorption processes well. Moreover, the results of adsorption kinetics showed that the pseudo second-order kinetic model was more effective for the description of adsorption mechanism of both metals. Furthermore, the equilibrium studies indicated that Langmuir and Freundlich isotherm models were desirable for lead and arsenic ions, respectively.

这项研究的目的是使用柠檬柑橘 制备的活性炭去除水溶液中的铅和砷离子树叶。使用BET，SEM，EDS和作图，XRD和RAMAN分析对制备的吸附剂的特性进行了深入研究。实验结果表明，Pb（II）和As（III）的最高吸附效率分别为97.67％和95.89％。另外，吸附剂成功再生了四次，因此能够很好地执行吸附和解吸过程。而且，吸附动力学的结果表明，伪二级动力学模型对于两种金属的吸附机理的描述更为有效。此外，平衡研究表明，Langmuir和Freundlich等温线模型分别适用于铅和砷离子。