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Modification of naturally abundant resources for remediation of potentially toxic elements: A review
Journal of Hazardous Materials ( IF 13.6 ) Pub Date : 2021-07-27 , DOI: 10.1016/j.jhazmat.2021.126755
Bing Han 1 , Anthony J Weatherley 2 , Kathryn Mumford 3 , Nanthi Bolan 4 , Ji-Zheng He 2 , Geoffrey W Stevens 3 , Deli Chen 2
Affiliation  

Water and soil contamination due to potentially toxic elements (PTEs) represents a critical threat to the global ecosystem and human health. Naturally abundant resources have significant advantages as adsorbent materials for environmental remediation over manufactured materials such as nanostructured materials and activated carbons. These advantages include cost-effectiveness, eco-friendliness, sustainability, and nontoxicity. In this review, we firstly compare the characteristics of representative adsorbent materials including bentonite, zeolite, biochar, biomass, and effective modification methods that are frequently used to enhance their adsorption capacity and kinetics. Following this, the adsorption pathways and sites are outlined at an atomic level, and an in-depth understanding of the structure-property relationships are provided based on surface functional groups. Finally, the challenges and perspectives of some emerging naturally abundant resources such as lignite are examined. Although both unamended and modified naturally abundant resources face challenges associated with their adsorption performance, cost performance, energy consumption, and secondary pollution, these can be tackled by using advanced techniques such as tailored modification, formulated mixing and reorganization of these materials. Recent studies on adsorbent materials provide a strong foundation for the remediation of PTEs in soil and water. We speculate that the pursuit of effective modification strategies will generate remediation processes of PTEs better suited to a wider variety of practical application conditions.



中文翻译:

改变天然丰富资源以修复潜在有毒元素:综述

由于潜在有毒元素 (PTE) 造成的水和土壤污染对全球生态系统和人类健康构成严重威胁。与纳米结构材料和活性炭等人造材料相比,天然丰富的资源作为用于环境修复的吸附材料具有显着的优势。这些优势包括成本效益、生态友好性、可持续性和无毒。在这篇综述中,我们首先比较了代表性吸附材料的特性,包括膨润土、沸石、生物炭、生物质,以及经常用于提高其吸附能力和动力学的有效改性方法。在此之后,吸附途径和位点在原子水平上概述,并基于表面官能团提供对结构-性能关系的深入理解。最后,研究了一些新兴的天然丰富资源(如褐煤)的挑战和前景。尽管未经修饰和修饰的天然丰富资源都面临着与吸附性能、成本性能、能耗和二次污染相关的挑战,但可以通过使用先进的技术来解决这些问题,例如对这些材料进行定制修饰、配方混合和重组。最近对吸附材料的研究为土壤和水中 PTE 的修复提供了坚实的基础。我们推测,追求有效的修饰策略将产生更适合更广泛的实际应用条件的 PTE 修复过程。

更新日期:2021-08-05
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