Taleb Md Abu, Kumar Rajeev, Barakat M A, Almeelbi T, Seliem Moaaz K, Ahmad Akil
Department of Environment, Faculty of Environmental Sciences, King Abdulaziz University, Jeddah 21589, Saudi Arabia.
Department of Environment, Faculty of Environmental Sciences, King Abdulaziz University, Jeddah 21589, Saudi Arabia.
Sci Total Environ. 2024 Dec 10;955:177093. doi: 10.1016/j.scitotenv.2024.177093. Epub 2024 Nov 2.
In the last decade, numerous designed adsorbent materials like metal-organic frameworks (MOFs), covalent organic frameworks (COF), carbon nanotubes (CNTs), etc. have been developed and investigated for metal ions extraction applications in the contaminated aquatic environment. These materials are facing the problems associated with large-scale production, cost, stability, and reusable. Conventional adsorption like carbon and silica is still valuable and is in use for industrial applications. In the last decade, silica has gone through a lot of alteration and modification to enhance its efficiency for heavy metal adsorption. In this review, the tailoring of the silica properties by surface functionalization or developing new hybrid composites for the scavenging of the heavy have been summarized. Silica functionalization with various organic functional groups, composites like silica/polymers, silica/metal oxide, silica aerogels, etc., has been explored. Moreover, interpretations of the effective metal uptake mechanisms associated with metal ions adsorption onto silica adsorbents are also investigated. Overall, the review offers comprehensive insights into the interface between metal ions and silica-based materials.
在过去十年中，人们开发并研究了许多设计的吸附材料，如金属有机框架（MOF）、共价有机框架（COF）、碳纳米管（CNT）等，用于在受污染的水生环境中提取金属离子。这些材料面临着与大规模生产、成本、稳定性和可重复使用性相关的问题。传统的吸附剂如碳和二氧化硅仍然很有价值，并在工业应用中使用。在过去十年中，二氧化硅经历了许多改变和改性，以提高其对重金属吸附的效率。在这篇综述中，总结了通过表面功能化或开发新型杂化复合材料来调整二氧化硅性能以清除重金属的方法。已经探索了用各种有机官能团对二氧化硅进行功能化、二氧化硅/聚合物、二氧化硅/金属氧化物、二氧化硅气凝胶等复合材料。此外，还研究了与金属离子吸附到二氧化硅吸附剂上相关的有效金属吸收机制的解释。总体而言，该综述提供了对金属离子与二氧化硅基材料之间界面的全面见解。
