Elsayed Islam, Schueneman Gregory T, El-Giar Emad M, Hassan El Barbary
Department of Sustainable Bioproducts, Mississippi State University, Starkville, MI 39762, USA.
Department of Chemistry, Faculty of Science, Damietta University, New Damietta 34517, Egypt.
Gels. 2023 Feb 14;9(2):154. doi: 10.3390/gels9020154.
Due to the increasingly widespread water pollutants and the high cost of treatment methods, there is a demand for new, inexpensive, renewable, and biodegradable adsorbent materials for the purification of wastewater contaminants. In this study, a new biocomposite aerogel (Amf-CNF/LS) was prepared using a chemically cross-linking method between the amino-functionalized cellulose nanofibers (Amf-CNF) and lignosulfonates (LS). The physical and chemical properties of the prepared aerogel were investigated using several techniques including elemental analysis, scanning electron microscopy (SEM-EDS), Fourier transform infrared spectroscopy (FTIR), thermal gravimetric analysis (TGA), and N adsorption-desorption analysis. The Amf-CNF/LS aerogel was then applied for the removal of methylene blue (MB), rhodamine B dye (RhB), and the heavy metal cadmium ion (Cd) from synthetic wastewater solutions. The adsorption parameters controlling the adsorption process including the pH, contact time, adsorbent dosage, and adsorbate concen-tration were optimized. High adsorption kinetics and isotherms were observed, with the adsorption isotherms of the Amf-CNF/LS aerogel fitting the Langmuir model with maximum adsorption capacities of 170.94, 147.28, and 129.87 mg/g for MB, RhB, and Cd, respectively. These results show that Amf-CNF/LS aerogel is a promising green and inexpensive adsorbent for MB, RhB, and Cd removal from wastewater.
由于水污染物日益广泛存在且处理方法成本高昂，因此需要新型、廉价、可再生且可生物降解的吸附剂材料来净化废水污染物。在本研究中，通过氨基功能化纤维素纳米纤维（Amf-CNF）与木质素磺酸盐（LS）之间的化学交联方法制备了一种新型生物复合气凝胶（Amf-CNF/LS）。使用多种技术对制备的气凝胶的物理和化学性质进行了研究，包括元素分析、扫描电子显微镜（SEM-EDS）、傅里叶变换红外光谱（FTIR）、热重分析（TGA）和N吸附-脱附分析。然后将Amf-CNF/LS气凝胶应用于从合成废水溶液中去除亚甲基蓝（MB）、罗丹明B染料（RhB）和重金属镉离子（Cd）。优化了控制吸附过程的吸附参数，包括pH值、接触时间、吸附剂用量和吸附质浓度。观察到了较高的吸附动力学和等温线，Amf-CNF/LS气凝胶的吸附等温线符合朗缪尔模型，对MB、RhB和Cd的最大吸附容量分别为170.94、147.28和129.87 mg/g。这些结果表明，Amf-CNF/LS气凝胶是一种有前景的绿色且廉价的吸附剂，可用于从废水中去除MB、RhB和Cd。
