Azzam Eid M S, Elsofany Walaa I, Abdulaziz Fahad, AlGhamdi Hind A, Al Alhareth Abdullah Y
Department of Chemistry, College of Science, University of Ha'il, Ha'il 81451, Saudi Arabia.
Egyptian Petroleum Research Institute, Cairo 11727, Egypt.
Polymers (Basel). 2023 Jun 21;15(13):2759. doi: 10.3390/polym15132759.
Nickel ions are hazardous heavy metals that are non-biodegradable and can lead to allergic sensitivity and dermatitis. Nanomaterials are chosen for their effective elimination of impurities from water structures based entirely on the variety of therapy and degree of purification. The target of this work was the combination of the properties of biopolymers such as chitosan, silver nanoparticles (SNPs), and carbon nanotubes (CNTs) in one ecofriendly compound for Ni (II) uptake from the aqueous solution. To attain this target, the endeavor was made by creating a nanocomposite based on chitosan/SNPs/CNTs. The characterization of the structure of the fabricated nanocomposite (Chit-SNPs-CNTs) was carried out using different techniques. The removal of Ni (II) was examined by studying the adsorption of Ni (II) ions onto the fabricated nanocomposite by batch adsorption using UV, XRD, XPS, and ICP techniques. Moreover, we investigated the effect of the contact time, pH of the solution, and mass of the adsorbent on the efficiency of the adsorption of Ni (II). The results show that the adsorption capacity of Ni (II) increased by increasing the contact time with a neutral pH. The maximum removal of Ni (II) ions (99.70%) was found using 0.3 g of the (Chit-SNPs-CNTs) nanocomposite. In addition, the results indicate that the fabricated nanocomposite has a high adsorption effectivity, which is associated to the function of the chitosan, SNPs, and CNTs in upgrading the adsorption efficiency. Finally, the results in the existing work indicate that the ecofriendly nanocomposite organized here gave excessive effectivity closer to the elimination of Ni (II).
镍离子是具有危害性的重金属，不可生物降解，会导致过敏反应和皮炎。选择纳米材料是因为它们能基于多种处理方法和净化程度有效去除水体中的杂质。本研究的目标是将壳聚糖、银纳米颗粒（SNPs）和碳纳米管（CNTs）等生物聚合物的特性结合在一种环保型化合物中，用于从水溶液中去除镍（II）。为实现这一目标，通过制备基于壳聚糖/SNPs/CNTs的纳米复合材料来开展研究。采用不同技术对制备的纳米复合材料（Chit-SNPs-CNTs）的结构进行表征。通过使用紫外可见光谱（UV）、X射线衍射（XRD）、X射线光电子能谱（XPS）和电感耦合等离子体质谱（ICP）技术，采用分批吸附法研究镍（II）离子在制备的纳米复合材料上的吸附情况，以此考察镍（II）的去除效果。此外，还研究了接触时间、溶液pH值和吸附剂质量对镍（II）吸附效率的影响。结果表明，在中性pH条件下，随着接触时间的增加，镍（II）的吸附量增加。使用0.3 g的（Chit-SNPs-CNTs）纳米复合材料时，镍（II）离子的最大去除率为99.70%。此外，结果表明制备的纳米复合材料具有较高的吸附效率，这与壳聚糖、SNPs和CNTs在提高吸附效率方面的作用有关。最后，现有研究结果表明，此处制备的环保型纳米复合材料在去除镍（II）方面具有很高的效率。
