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芦荟功能化磁性纳米颗粒包埋海藻酸钙珠作为从水溶液中去除铜（II）的新型吸附剂

Aloe Vera Functionalized Magnetic Nanoparticles Entrapped Ca Alginate Beads as Novel Adsorbents for Cu(II) Removal from Aqueous Solutions.

作者信息

Lilhare Surbhi, Mathew Sunitha B, Singh Ajaya Kumar, Carabineiro Sónia A C

机构信息

Department of Chemistry, Govt. V. Y. T. PG Autonomous College, Durg, Chhattishgarh 491001, India.

School of Chemistry & Physics, Westville Campus, University of KwaZulu-Natal, Durban 4000, South Africa.

出版信息

Nanomaterials (Basel). 2022 Aug 26;12(17):2947. doi: 10.3390/nano12172947.

DOI:10.3390/nano12172947
PMID:36079984
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9457615/
Abstract

CABs (Ca alginate beads), AVCABs (Aloe vera Ca alginate beads), and AVMNCABs (Aloe-vera functionalized magnetic nanoparticles entrapped Ca alginate beads) were developed as adsorbents for the removal of Cu(II) from aqueous solutions. The materials were characterized using Fourier-transform infrared (FTIR) spectroscopy, high-resolution scanning electron microscopic (HR-SEM) analysis, X-ray diffraction (XRD), energy-dispersive X-ray (EDX) spectroscopy, and a vibrating-sample magnetometer (VSM). The effect of several parameters, such as pH, time, temperature, adsorbent dose, etc., were investigated. The adsorption isotherm of Cu(II) was adjusted best to the Langmuir model. The maximum adsorption capacities were 111.11 mg/g, 41.66 mg/g, and 15.38 mg/g for AVMNCABs, AVCABs, and CABs, respectively. The study of the adsorption kinetics for Cu(II) ions on beads followed a pseudo-second-order kinetic model, with a very good correlation in all cases. The adsorption studies used a spectrophotometric method, dealing with the reaction of Cu(II) with KSCN and variamine blue.

摘要

制备了海藻酸钙珠（CABs）、芦荟海藻酸钙珠（AVCABs）和芦荟功能化磁性纳米颗粒包埋海藻酸钙珠（AVMNCABs）作为从水溶液中去除铜（II）的吸附剂。使用傅里叶变换红外（FTIR）光谱、高分辨率扫描电子显微镜（HR-SEM）分析、X射线衍射（XRD）、能量色散X射线（EDX）光谱和振动样品磁强计（VSM）对材料进行了表征。研究了pH、时间、温度、吸附剂剂量等几个参数的影响。铜（II）的吸附等温线最符合朗缪尔模型。AVMNCABs、AVCABs和CABs对铜（II）的最大吸附容量分别为111.11 mg/g、41.66 mg/g和15.38 mg/g。对珠子上铜（II）离子的吸附动力学研究遵循准二级动力学模型，在所有情况下相关性都非常好。吸附研究采用分光光度法，涉及铜（II）与硫氰酸钾和变色酸蓝的反应。

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