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（4）-吗啉代硫代氨基脲修饰的纤维素：合成、结构、动力学、热力学及镍（II）去除研究

(4)-Morpholinothiosemicarbazide-Modified Cellulose: Synthesis, Structure, Kinetics, Thermodynamics, and Ni(II) Removal Studies.

作者信息

Vu Huy T, Phan My T D, Tran Uyen T T, Nguyen Giao D, Duong Vu B, Tran Dang B

机构信息

Faculty of Chemistry, Ho Chi Minh City University of Education, Ho Chi Minh City 700000 Vietnam.

VNU-HCM High School for the Gifted, Ho Chi Minh City 700000, Vietnam.

出版信息

ACS Omega. 2020 Jun 19;5(25):15229-15239. doi: 10.1021/acsomega.0c01234. eCollection 2020 Jun 30.

DOI:10.1021/acsomega.0c01234
PMID:32637796
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7331069/
Abstract

In this study, cellulose extracted from straw was modified using (4)-morpholinothiosemicarbazide to generate a novel adsorbent as a chelate-complex-based material. The effects of pH, time, temperature, and mass ratios of KIO: cellulose on the yield of the oxidation were analyzed using iodometric titration and photometric methods. The accuracy and precision of the above two methods were evaluated using Student and Fisher statistical distribution. The structure of the material was characterized by Fourier-transform infrared spectroscopy, thermogravimetric analysis, X-ray diffraction, scanning electron microscopy, and Brunauer-Emmett-Teller surface area analysis. The kinetic order of Ni(II) adsorption was dependent on the concentration of Ni(II). The surface response design enabled to optimize the condition for Ni(II) adsorption at 58 °C, pH of 4.98, within 106 min. The maximum Ni(II) adsorption capacity was 90 mg g. This kind of adsorbent can be reused at least five times without a significant decrease in its adsorption efficiency.

摘要

在本研究中，使用（4）-吗啉代硫代氨基脲对从秸秆中提取的纤维素进行改性，以制备一种新型吸附剂，作为基于螯合络合物的材料。采用碘量滴定法和光度法分析了pH、时间、温度以及KIO与纤维素的质量比对氧化产率的影响。使用学生统计分布和费舍尔统计分布评估上述两种方法的准确性和精密度。通过傅里叶变换红外光谱、热重分析、X射线衍射、扫描电子显微镜和布鲁诺尔-埃米特-泰勒表面积分析对该材料的结构进行了表征。Ni（II）吸附的动力学级数取决于Ni（II）的浓度。表面响应设计能够优化在58℃、pH为4.98、106分钟内Ni（II）的吸附条件。最大Ni（II）吸附容量为90 mg/g。这种吸附剂可以重复使用至少五次，而其吸附效率不会显著降低。

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