Synthesis, characterization, and adsorption capacity of sodium alginate poly grafted (fumaric acid-co-polyacrylic acid)/graphene oxide hydrogel as adsorbent for Cr (VI) and Pb (II) removal

IF 2.2 4区 化学 Q3 CHEMISTRY, MULTIDISCIPLINARY Journal of the Iranian Chemical Society Pub Date : 2024-05-18 DOI:10.1007/s13738-024-03037-3
Hiba Alnasery, Abdolhossein Naseri, Layth Samir Jasim, Sanaz Sajedi-Amin
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Abstract

This study involves the preparation of sodium alginate poly grafted (fumaric acid-polyacrylic acid)/graphene oxide, SA-g-p(FA-AA)/GO hydrogel to explore its potential as a promising adsorbent for water treatment mainly chromium (VI) and lead (II) removal. Prepared adsorbent was characterized by FTIR, TGA, XRD, FESEM, and TEM techniques for exploring the chemical structure, thermal stability, crystallography, surface area and morphology, as well as pore size and distribution of SA-g-p(FA-AA)/GO, respectively. The average size of the prepared nanoparticles was observed to be 78.48 nm. The TEM images exhibit a predominantly spherical shape and heterogeneous. Effect of different physiochemical parameters such as pH, temperature, adsorbent dosage, and contact time was explored for maximum metal adsorption. The results of the study revealed that the maximum adsorption capacity of SA-g-p(FA-AA)/GO (0.045 mg g−1 for Cr (VI) and 22.371 mg g−1 for Pb (II)) was achieved under optimized conditions, i.e., adsorbent dose of 0.05 g at 25 °C for pH of 2, 4.5 when contact time of 5 and 100 min was used for Cr(VI) and Pb(II), respectively. Data fits best to the pseudo-second-order kinetic equation revealing the multilayer adsorption of Cr (VI) and Pb (II) ions on the heterogeneous adsorbent surface. Thermodynamically, the process of Cr (VI) and Pb (II) adsorption was non-spontaneous, exothermic and feasible revealing the potential of the prepared adsorbent to be used as an efficient adsorbent for metal removal.

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海藻酸钠聚接枝(富马酸-聚丙烯酸)/氧化石墨烯水凝胶作为吸附剂去除铬 (VI) 和铅 (II) 的合成、表征和吸附能力
本研究涉及海藻酸钠聚接枝(富马酸-聚丙烯酸)/氧化石墨烯(SA-g-p(FA-AA)/GO)水凝胶的制备,以探索其作为水处理吸附剂的潜力,主要是去除铬(VI)和铅(II)。利用傅立叶变换红外光谱(FTIR)、热重分析(TGA)、X射线衍射(XRD)、可见分光光电子能谱(FESEM)和可见分光光电子能谱(TEM)技术对制备的吸附剂进行了表征,分别探讨了SA-g-p(FA-AA)/GO的化学结构、热稳定性、结晶学、表面积和形貌以及孔径和分布。制备的纳米粒子的平均尺寸为 78.48 nm。TEM 图像显示,纳米颗粒主要呈球形,且具有异质性。研究人员探讨了 pH 值、温度、吸附剂用量和接触时间等不同理化参数对金属吸附量最大化的影响。研究结果表明,SA-g-p(FA-AA)/GO 的最大吸附容量(0.045 mg g-1(六价铬)和 22.371 mg g-1(二价铅))是在优化条件下实现的,即吸附剂剂量为 0.05 g,温度为 25 °C,pH 值为 2、4.5,六价铬和二价铅的接触时间分别为 5 分钟和 100 分钟。数据与伪二阶动力学方程的拟合度最高,表明铬(VI)和铅(II)离子在异质吸附剂表面的多层吸附。从热力学角度看,Cr (VI) 和 Pb (II) 的吸附过程是非自发的、放热的和可行的,这揭示了所制备的吸附剂作为一种高效吸附剂去除金属的潜力。
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来源期刊
CiteScore
4.40
自引率
8.30%
发文量
230
审稿时长
5.6 months
期刊介绍: JICS is an international journal covering general fields of chemistry. JICS welcomes high quality original papers in English dealing with experimental, theoretical and applied research related to all branches of chemistry. These include the fields of analytical, inorganic, organic and physical chemistry as well as the chemical biology area. Review articles discussing specific areas of chemistry of current chemical or biological importance are also published. JICS ensures visibility of your research results to a worldwide audience in science. You are kindly invited to submit your manuscript to the Editor-in-Chief or Regional Editor. All contributions in the form of original papers or short communications will be peer reviewed and published free of charge after acceptance.
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