In this study activated carbon has been prepared using waste mango fruit peels as the precursor in a facile manner (MAC). In order to increase the efficiency and regenerability of activated carbon, nickel nanoparticles were impregnated. Morphological and crystalline structures of the prepared composite were investigated by field emission scanning electron microscopy (FESEM) and X‐ray diffraction (XRD) analysis. MAC/Ni as an adsorbent was found to remove 98 % and 93 % of Rhodamine B (RhB) dye and manganese ions (Mn²⁺) from their aqueous solutions. The regeneration study demonstrated that after the completion of five adsorption cycles, the removal efficiency for RhB and Mn²⁺ was 88.7 % and 85.2 %, respectively, corroborating the reusability of the prepared adsorbent. The kinetics of the adsorption of RhB and Mn²⁺ ions on the surface of nanocomposite was found to follow the pseudo‐second order model with a great degree of accuracy (R²∼0.99). The value of the equilibrium parameter R_L was found to be 0.015 and 0.003 respectively for RhB and Mn²⁺ at 303 K which suggested that the Langmuir isotherm could be used to describe the favorable adsorption of the RhB dye and Mn²⁺ ions on the adsorbent under the conditions used in the study.

中文翻译：

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芒果皮衍生的活性碳-镍纳米复合材料作为吸附剂从水溶液中去除重金属和有机染料的开发

在这项研究中，活性炭是用芒果废果皮作为前体以方便的方式制备的（MAC）。为了提高活性炭的效率和可再生性，对镍纳米粒子进行了浸渍。通过场发射扫描电子显微镜（FESEM）和X射线衍射（XRD）分析研究了所制备复合材料的形态和晶体结构。发现MAC / Ni作为吸附剂可从其水溶液中去除98％和93％的若丹明B（RhB）染料和锰离子（Mn ²⁺）。再生研究表明，在完成五个吸附循环后，RhB和Mn ²⁺的去除效率分别为88.7％和85.2％，证实了所制备吸附剂的可重复使用性。罗丹明B和Mn中的吸附的动力学²⁺纳米复合材料的表面上的离子被发现遵循伪二阶模型有很大程度的精度（R ² ~0.99）。发现303 K时RhB和Mn ²⁺的平衡参数R _L的值分别为0.015和0.003，这表明Langmuir等温线可用于描述RhB染料和Mn ²⁺离子的良好吸附。在研究条件下使用吸附剂。