Characterization and Evaluation of Iron Oxide Nanoparticles Prepared Using Hydrogel Template Based on Phosphonate Alginate

T. Tamer, W. Abou-Taleb, G. D. Roston, M. S. Mohyeldin, A. Omer, E. F. Shehata
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引用次数: 3

Abstract

Currently, the use of nano-sorbent for the aqueous heavy metals removal is popular among researchers. In this study, iron oxide nanoparticles were developed as a promising adsorbent for Cr (VI) removal from its aqueous solution. Simple template surface method based on phosphonated alginate biopolymer was employed for the nanoparticles preparation. Different physical characterization tools such as FT-IR, SEM, TEM, XRD and magnetic properties were applied to investigate the physicochemical character of the developed nanoparticles. Batch experiments were used to study the applicability of iron oxide nanoparticles for Cr (VI) removal from aqueous solutions under different preparation conditions. The effects of initial Cr (VI) concentration, pH, adsorbent dosage, contact time and temperature on the removal process were also optimized. Results indicate that the removal efficiency of Cr (VI) increased from 14.44% to 67.85% with increasing iron oxide nanoparticles dosage from 0.025g to 0.3g. Furthermore, the removal percent rose from 39.11% to 56.04% by increasing the environmental temperature up to 50°C. While it decreased with increasing initial concentration of Cr (VI). The best results of removal were recorded at pH=2. Overall, the obtained results indicate that the developed iron oxide nanoparticles could be effectively used as adsorbents for removal of Cr (VI) from aqueous solutions.
基于海藻酸膦酸盐的水凝胶模板制备氧化铁纳米颗粒的表征与评价
目前,利用纳米吸附剂去除水中重金属受到研究人员的广泛关注。在这项研究中,氧化铁纳米颗粒被开发为一种很有前途的吸附剂,用于去除水溶液中的铬(VI)。采用基于磷酸藻酸盐生物聚合物的简单模板表面法制备纳米颗粒。采用FT-IR、SEM、TEM、XRD、磁性能等物理表征手段对制备的纳米颗粒进行了理化性质表征。通过批量实验研究了不同制备条件下氧化铁纳米颗粒去除水溶液中铬(VI)的适用性。优化了初始Cr (VI)浓度、pH、吸附剂投加量、接触时间和温度对去除过程的影响。结果表明,当氧化铁纳米粒子投加量由0.025g增加到0.3g时,对Cr (VI)的去除率由14.44%提高到67.85%。将环境温度提高到50℃,去除率由39.11%提高到56.04%。随着Cr (VI)初始浓度的增加,去除率降低,pH=2时去除率最高。综上所述,所制备的氧化铁纳米颗粒可以作为吸附剂有效地去除水溶液中的Cr (VI)。
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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