In this study, a composite of zerovalent copper-biochar was investigated for its ability to remove lead from water. The prepared material was characterized by using scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FTIR), X-ray diffractomter (XRD), and X-ray photoelectron spectroscopy (XPS). The pH effect on adsorption of lead was investigated within the range of 2–8 and the effect of temperature was studied at 303, 308, 313, and 318 K. The kinetics of lead adsorption on biochar composite was evaluated and the equilibrium time of 12 hr was established. To further evaluate the nature of adsorption, Langmuir model was tested and the adsorption capacities were evaluated for lead adsorption on the surface of copper biochar composite. The activation energy, entropy, and enthalpy values indicated the adsorption phenomenon to be chemisorptive and spontaneous in nature. Comparison of adsorption capacities with the reported adsorbents in the literature concluded zerovalent copper-biochar composite to be an efficient adsorbent for the removal of lead in the experimental conditions under study.

中文翻译：

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用于铅吸附的新型生物炭-零价铜纳米复合材料

在这项研究中，研究了零价铜-生物炭复合材料从水中去除铅的能力。采用扫描电子显微镜（SEM）、傅里叶变换红外光谱（FTIR）、X射线衍射仪（XRD）和X射线光电子能谱（XPS）对制备的材料进行表征。在 2-8 的范围内研究了 pH 对铅吸附的影响，并在 303、308、313 和 318 K 下研究了温度的影响。评估了铅在生物炭复合材料上的吸附动力学，平衡时间为 12 hr成立。为了进一步评估吸附的性质，测试了朗缪尔模型，并评估了铜生物炭复合材料表面对铅的吸附能力。活化能、熵、和焓值表明吸附现象本质上是化学吸附和自发的。吸附容量与文献中报道的吸附剂的比较得出结论，零价铜-生物炭复合材料是在所研究的实验条件下去除铅的有效吸附剂。