Separation of La(III) and Ni(II) from Binary System Using Manganese Oxide Nanorods

IF 4.9 3区 化学 Q2 POLYMER SCIENCE
E. M. Abu Elgoud, S. E. A. Sharaf El-Deen, A. El-khalafawy
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Abstract

The recovery and separation of lanthanum from a La(III)/Ni(II) mixture present a significant challenge in obtaining high-purity lanthanum, which is necessary for many applications in various industries. In the present study, manganese oxide nanorods were prepared and characterized by TEM, EDX, SEM, FT-IR, TGA, and XRD. The TEM images reported that the manganese oxide nanoparticles were arranged into rod-shaped structures with pores between them. Batch adsorption experiments were performed to evaluate the sorption efficiency and separation of La(III) and Ni(II) from the binary system under varying conditions, including shaking time, solution pH, initial metal ion concentration, adsorbent dosage, and temperature. The results obtained showed that the sorption process of La(III) and Ni(II) using MnO2-nanorods fit well with the pseudo-second-order kinetics and the Langmuir isotherm model. The experimental sorption capacities according to the Langmuir isotherm model were found to be 13.757 mg/g and 0.766 mg/g for La(III) and Ni(II), respectively. According to thermodynamic results, the sorption process for Ni(II) and La(III) was endothermic and spontaneous was verified by the positive ΔHo and the negative ΔGo values. Furthermore, the MnO2-nanorods presented excellent selectivity and separation of lanthanum from the La(III)/Ni(II) mixture at pH 3.0, shaking time 30.0 min, and 0.05 adsorbent dosage at room temperature.

用氧化锰纳米棒分离二元体系中的La(III)和Ni(II
从La(III)/Ni(II)混合物中回收和分离镧是获得高纯度镧的重大挑战,而高纯度镧是各种工业中许多应用所必需的。本研究制备了氧化锰纳米棒,并通过TEM、EDX、SEM、FT-IR、TGA和XRD对其进行了表征。透射电镜图像显示,氧化锰纳米颗粒呈棒状排列,纳米颗粒之间有孔。在振荡时间、溶液pH、初始金属离子浓度、吸附剂投加量和温度等条件下,对La(III)和Ni(II)的吸附效果和分离效果进行了批量吸附实验。结果表明,二氧化锰纳米棒吸附La(III)和Ni(II)的过程符合拟二级动力学和Langmuir等温线模型。Langmuir等温线模型对La(III)和Ni(II)的吸附量分别为13.757 mg/g和0.766 mg/g。热力学结果表明,Ni(II)和La(III)的吸附过程是吸热自发的,并得到了正ΔHo和负ΔGo值的验证。在室温条件下,在pH为3.0、振荡时间为30.0 min、吸附剂用量为0.05的条件下,二氧化锰纳米棒对La(III)/Ni(II)混合物中镧具有良好的选择性和分离效果。
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来源期刊
CiteScore
8.30
自引率
7.50%
发文量
335
审稿时长
1.8 months
期刊介绍: Journal of Inorganic and Organometallic Polymers and Materials [JIOP or JIOPM] is a comprehensive resource for reports on the latest theoretical and experimental research. This bimonthly journal encompasses a broad range of synthetic and natural substances which contain main group, transition, and inner transition elements. The publication includes fully peer-reviewed original papers and shorter communications, as well as topical review papers that address the synthesis, characterization, evaluation, and phenomena of inorganic and organometallic polymers, materials, and supramolecular systems.
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