凝胶/PVA 修饰的超顺磁性氧化铁纳米粒子从水溶液中吸附 Cu(II)和 Zn(II)离子。
Adsorption of Cu(II) and Zn(II) Ions from Aqueous Solution by Gel/PVA-Modified Super-Paramagnetic Iron Oxide Nanoparticles.
机构信息
Zhejiang Provincial Key Lab for Chemical and Biological Processing Technology of Farm Product, School of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China.
State Key Laboratory Breeding Base of Dao-di Herbs, National Resource Center for Chinese Material Medical, China Academy of Chinese Medical Sciences, Beijing 100700, China.
出版信息
Molecules. 2018 Nov 15;23(11):2982. doi: 10.3390/molecules23112982.
Super-paramagnetic iron oxide nanoparticles (SPIONs)/gelatin (gel)/polyvinyl alcohol (PVA) nanoparticles were designed and synthesized by the co-precipitation method and further modified with gel and PVA. These nanoparticles were used for the removal of Cu(II) and Zn(II) from aqueous solutions. The adsorbents were rich in different functional groups for chemisorption and showed effective adsorption properties. The adsorption of Cu(II) and Zn(II) on the SPIONs/gel and SPIONs/gel/PVA materials were investigated with respect to pH, adsorption kinetics, and adsorption isotherms. The adsorption data was fitted to the Langmuir, Freundlich, and Sips models at the optimum pH 5.2 (±0.2) over 60 min; SPIONs/gel showed maximum adsorption capacities of 47.594 mg/g and 40.559 mg/g for Cu(II) and Zn(II); SPIONs/gel/PVA showed those of 56.051 mg/g and 40.865 mg/g, respectively. The experimental data fitted the pseudo-second-order model, indicating that the process followed chemical monolayer adsorption. In addition, the SPIONs/gel/PVA showed better stability and Cu(II) adsorption efficiency than SPIONs/gel.
超顺磁性氧化铁纳米粒子（SPIONs）/明胶（gel）/聚乙烯醇（PVA）纳米粒子通过共沉淀法设计和合成，并进一步用凝胶和 PVA 进行修饰。这些纳米粒子用于从水溶液中去除 Cu(II)和 Zn(II)。吸附剂富含不同的官能团，用于化学吸附，并表现出有效的吸附性能。研究了 SPIONs/gel 和 SPIONs/gel/PVA 材料在 pH 值、吸附动力学和吸附等温线方面对 Cu(II)和 Zn(II)的吸附。在最佳 pH 值 5.2（±0.2）下，吸附数据在 60 分钟内拟合 Langmuir、Freundlich 和 Sips 模型；SPIONs/gel 对 Cu(II)和 Zn(II)的最大吸附容量分别为 47.594 mg/g 和 40.559 mg/g；SPIONs/gel/PVA 分别为 56.051 mg/g 和 40.865 mg/g。实验数据拟合伪二级模型，表明该过程遵循化学单层吸附。此外，SPIONs/gel/PVA 比 SPIONs/gel 具有更好的稳定性和 Cu(II)吸附效率。
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