Mohamed Rasha M K
Department of Chemistry, College of Science, Jouf University, P.O. Box: 2014, Sakaka, Saudi Arabia.
Department of Chemistry, Faculty of Science, Assiut University, P.O. Box: 71515, Assiut, Egypt.
Heliyon. 2023 Jun 10;9(6):e17197. doi: 10.1016/j.heliyon.2023.e17197. eCollection 2023 Jun.
Acacia Senegal Gum hydrogel (HASG) with swollen dimension less than 50 μm were fabricated, and chemically modified with versatile diethylenetriamine (d-amine) to tailor the surface properties for environmental remediation. Negatively charged metal ions, for example, chromate (Cr(III)), dichromate (Cr(VI)), and arsenate (As(V)) were removed from aqueous media by using modified hydrogels (m-HASG). The FT-IR spectra revealed some new peaks due to d-amine treatment. The zeta potential measurements confirm a positively charged surface of HASG upon d-amine modification at ambient conditions. The absorption studies revealed that 0.05 g feed of m-(HASG) possesses 69.8, 99.3, and 40.00% cleaning potential against As(V), Cr(VI), and Cr(III), respectively with 2 h contact time in deionized water. Almost comparable adsorption efficiency was achieved by the prepared hydrogels towards the targeted analytes dissolved in real water samples. Adsorption isotherms, for example, Langmuir, Freundlich and modified Freundlich isotherms were applied to the collected data. Briefly, Modified Freundlich isotherm manifested comparatively agreeable line for the all adsorbents pollutants with highest R figure. In addition, maximum adsorption capacity (Qm) with 217, 256, and 271 mg g numerical values were obtained against As(V), Cr(VI), and Cr(III), respectively. In real water samples, 217, 256, and 271 mg g adsorption capacity was represented by m-(HASG). In brief, m-(HASG) is a brilliant material for environmental application as cleaner candidate towards toxic metal ions.
制备了尺寸小于50μm的阿拉伯胶 Senegal 水凝胶（HASG），并用多功能二乙烯三胺（二胺）进行化学改性，以调整其表面性质用于环境修复。通过使用改性水凝胶（m-HASG）从水性介质中去除带负电荷的金属离子，例如铬酸盐（Cr(III)）、重铬酸盐（Cr(VI)）和砷酸盐（As(V)）。傅里叶变换红外光谱（FT-IR）显示由于二胺处理出现了一些新峰。zeta 电位测量证实，在环境条件下二胺改性后 HASG 表面带正电荷。吸附研究表明，在去离子水中接触2小时后，0.05g的m-(HASG)对As(V)、Cr(VI)和Cr(III)的清洁潜力分别为69.8%、99.3%和40.00%。所制备的水凝胶对溶解在实际水样中的目标分析物具有几乎相当的吸附效率。吸附等温线，例如朗缪尔等温线、弗伦德里希等温线和改性弗伦德里希等温线被应用于收集的数据。简而言之，改性弗伦德里希等温线对所有吸附剂-污染物表现出相对较好的拟合线，R值最高。此外，针对As(V)、Cr(VI)和Cr(III)分别获得了数值为217、256和271mg/g的最大吸附容量（Qm）。在实际水样中，m-(HASG)的吸附容量为217、256和271mg/g。简而言之，m-(HASG)是一种出色的环境应用材料，是去除有毒金属离子的优质候选材料。
