Browsing by Author "Alyami, Hussain Hadi"

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Recent Advancements in Graphene Oxide Adsorbents for Wastewater Treatment
(Saudi Digital Library, 2023-10-02) Alyami, Hussain Hadi; Tahir, Asif; Roy, Anurag
The rapid increase in the world's population, alongside accelerated industrial expansion and the profound impacts of climate change, is intensifying the global water scarcity crisis. Graphene oxide (GO) and its varied composites play a pivotal role in wastewater purification, attributed to their superior adsorptive, oxidative, and catalytic properties. This review highlights the advances in hybrid graphene-based membrane materials, specifically engineered for water purification, addressing the growing demand for potable water. Intrinsically, graphene and GO and their composites boast a considerable pore volume, outstanding conductivity, diverse surface chemistry, and a remarkable aspect ratio. These attributes position them as ideal agents for the adsorption and catalysis of organic pollutants from wastewater. Notably, the sheet-like, resonant, polyaromatic π-system inherent in graphene derivatives facilitates critical interactions with organic pollutants, be it π–π stacking, hydrogen bonding, or electrostatic interactions. Such pollutants span from dyes and pharmaceutical by products to a spectrum of agricultural and industrial effluents. Many of these pollutants possess reactive unsaturated aromatic structures and abundant oxygen-rich functional groups. Numerous studies have meticulously analyzed the adsorption capacities of these pollutants, often framed within the context of established adsorption isotherm models such as Langmuir and Freundlich. Likewise, kinetic models, determinative factors, and the reusability of adsorbents have been thoroughly investigated. However, there's a noticeable gap in comprehensive dialogues comparing graphene-based membranes to other hybrid counterparts. Deepening our understanding of these graphene-infused membranes is crucial, marking a new paradigm in graphene applications. It is projected that upcoming research endeavors will further scrutinize and perfect the fabrication techniques of these cutting-edge graphene membranes, catalyzing more innovations in the sector.
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