Optimized electrospun Schiff-base alumoxane/PAN nanofibers for lead and cadmium adsorption: characterization & RSM analysis

IF 2.8 4区 化学 Q3 POLYMER SCIENCE
Parastoo Arman Nezhad, Farzad Dabirian, Ali Ashraf Derakhshan, Laleh Rajabi, Sepide Heydari, Ali Rostami
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引用次数: 0

Abstract

This study details the preparation and evaluation of a nanofibrous composite adsorbent comprising polyacrylonitrile (PAN) as the polymer matrix and Schiff-base alumoxane (SBA), designed for the adsorption of heavy metal cations Pb2⁺ and Cd2⁺. The nanofibrous structure provides an extensive surface area for effective adsorption. Key factors such as solution pH, nanoparticle concentration, initial ion concentration, and contact time were systematically examined using response surface methodology (RSM) within a central composite design (CCD). The SBA/PAN nanocomposite nanofibers were synthesized through an electrospinning process, followed by a dip-coating technique, and subsequently characterized for their adsorption capabilities. The statistical analysis revealed that the model terms significantly influenced the adsorption process, with "Prob > F" values much less than 0.0500. The optimization of the process, achieved through the response surface optimization technique, led to a maximum removal efficiency of 97.22% for Pb2⁺ and 93.87% for Cd2⁺ under optimal conditions: initial ion concentration of 36.87 ppm, nanoparticle concentration of 4.02 wt.%, pH of 6.40, and a contact time of 69.11 min. Adsorption capacities of 35.84 mg/g for Pb2⁺ and 34.61 mg/g for Cd2⁺ were observed under these conditions. Reanalysis of isothermic and kinetic data confirmed Langmuir for Pb2⁺ and for Cd2⁺, with pseudo-second-order kinetics (R2 > 0.99) indicating chemisorption as the dominant mechanism. These findings demonstrate the potential of SBA/PAN nanocomposite nanofibers as effective adsorbents for heavy metal removal from aqueous solutions.emoval from aqueous solutions.

电纺丝席夫碱铝氧烷/聚丙烯腈纳米纤维对铅和镉的吸附:表征和RSM分析
本研究详细介绍了以聚丙烯腈(PAN)为聚合物基体,以希夫碱铝氧烷(SBA)为基材,用于吸附重金属阳离子Pb2 +和Cd2 +的纳米纤维复合吸附剂的制备和性能评价。纳米纤维结构为有效吸附提供了广阔的表面积。在中心复合设计(CCD)中,采用响应面法(RSM)系统地检测了溶液pH、纳米颗粒浓度、初始离子浓度和接触时间等关键因素。采用静电纺丝法和浸包法制备了SBA/PAN纳米复合纤维,并对其吸附性能进行了表征。统计分析表明,模型项对吸附过程有显著影响,“Prob >; F”值远小于0.0500。通过响应面优化技术对工艺进行优化,在初始离子浓度为36.87 ppm、纳米颗粒浓度为4.02 wt.%、pH为6.40、接触时间为69.11 min的最佳条件下,Pb2 +的最大去除率为97.22%,Cd2 +的最大去除率为93.87%,在此条件下Pb2 +的吸附量为35.84 mg/g, Cd2 +的吸附量为34.61 mg/g。等温和动力学数据的重新分析证实了Pb2 +和Cd2 +的Langmuir,拟二级动力学(R2 > 0.99)表明化学吸附是主要机理。这些发现证明了SBA/PAN纳米复合纳米纤维作为有效的吸附剂去除水中重金属的潜力。从水溶液中去除。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Polymer Research
Journal of Polymer Research 化学-高分子科学
CiteScore
4.70
自引率
7.10%
发文量
472
审稿时长
3.6 months
期刊介绍: Journal of Polymer Research provides a forum for the prompt publication of articles concerning the fundamental and applied research of polymers. Its great feature lies in the diversity of content which it encompasses, drawing together results from all aspects of polymer science and technology. As polymer research is rapidly growing around the globe, the aim of this journal is to establish itself as a significant information tool not only for the international polymer researchers in academia but also for those working in industry. The scope of the journal covers a wide range of the highly interdisciplinary field of polymer science and technology, including: polymer synthesis; polymer reactions; polymerization kinetics; polymer physics; morphology; structure-property relationships; polymer analysis and characterization; physical and mechanical properties; electrical and optical properties; polymer processing and rheology; application of polymers; supramolecular science of polymers; polymer composites.
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