Department of Organic Chemistry, Bioorganic Chemistry and Biotechnology, Silesian University of Technology, B. Krzywoustego 4, 44-100, Gliwice, Poland; School of Advanced Chemical Sciences, Shoolini University, Solan, 173229, Himachal Pradesh, India.
School of Advanced Chemical Sciences, Shoolini University, Solan, 173229, Himachal Pradesh, India.
Chemosphere. 2022 Sep;303(Pt 1):134917. doi: 10.1016/j.chemosphere.2022.134917. Epub 2022 May 12.
The present study used a free radical co-polymerization approach to synthesize a smart hydrogel of itaconic acid grafted poly(acrylic acid-co-aniline) (ItA-g-poly(AA-co-ANi)). ItA-g-poly(AA-co-ANi) hydrogel was characterized by Fourier transform infrared spectroscopy (FT-IR), Raman, X-ray diffraction (XRD), thermogravimetric analysis (TGA), field emission scanning electron microscope (FE-SEM), and X-ray photoelectron spectroscopy (XPS) analysis. Rhodamine B (RhB) dye was removed from an aqueous medium using ItA-g-poly(AA-co-ANi) hydrogel. To determine the maximum adsorption, the effect of parameters such as initial dye concentration, contact time, pH, and adsorbent dose were examined. The ItA-g-poly(AA-co-ANi) hydrogel had a high swelling percentage of 1755.3%. The high water penetration of ItA-g-poly(AA-co-ANi) hydrogel with a high swelling rate exposed the internal adsorption sites for RhB dye adsorption. The adsorption performance of ItA-g-poly(AA-co-ANi) hydrogel was explained by the pseudo-first-order and Freundlich adsorption isotherm models. Moreover, after four adsorption-desorption cycles, the ItA-g-poly(AA-co-ANi) hydrogel maintained an adsorption efficiency of 85.2%. The high water retention ability of ItA-g-poly(AA-co-ANi) hydrogel improved the moisture maintenance limit of soil for irrigation up to 23 days. As a result, ItA-g-poly(AA-co-ANi) hydrogel can be used in the elimination of toxic dyes as well as in irrigation systems.
本研究采用自由基共聚的方法合成了一种智能水凝胶，即接枝了衣康酸的聚（丙烯酸-co-苯胺）（ItA-g-poly(AA-co-ANi)）。通过傅里叶变换红外光谱（FT-IR）、拉曼、X 射线衍射（XRD）、热重分析（TGA）、场发射扫描电子显微镜（FE-SEM）和 X 射线光电子能谱（XPS）分析对 ItA-g-poly(AA-co-ANi)水凝胶进行了表征。采用 ItA-g-poly(AA-co-ANi)水凝胶从水溶液中去除罗丹明 B（RhB）染料。为了确定最大吸附量，考察了初始染料浓度、接触时间、pH 值和吸附剂剂量等参数的影响。ItA-g-poly(AA-co-ANi)水凝胶的溶胀率高达 1755.3%。ItA-g-poly(AA-co-ANi)水凝胶具有高水渗透率和高溶胀率，暴露出内部吸附位点，有利于 RhB 染料的吸附。ItA-g-poly(AA-co-ANi)水凝胶的吸附性能可以用伪一级和 Freundlich 吸附等温线模型来解释。此外，经过四个吸附-解吸循环后，ItA-g-poly(AA-co-ANi)水凝胶的吸附效率仍保持在 85.2%。ItA-g-poly(AA-co-ANi)水凝胶具有高保水能力，可将土壤的保水极限提高到 23 天，用于灌溉。因此，ItA-g-poly(AA-co-ANi)水凝胶可用于消除有毒染料以及灌溉系统。
