Equilibrium surface complexation modeling with metastable natural colloids: The key to predict the oxidation state distribution of trace elements?

IF 7.9 2区 化学 Q1 CHEMISTRY, PHYSICAL Current Opinion in Colloid & Interface Science Pub Date : 2024-06-08 DOI:10.1016/j.cocis.2024.101820
Rémi Marsac , Charlotte Catrouillet , Mathieu Pédrot , Marc F. Benedetti , Aline Dia , Eric D. van Hullebusch , Mélanie Davranche , Yann Sivry , Anne-Catherine Pierson-Wickmann , Mickael Tharaud , Frank Heberling
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Abstract

Predicting the behavior and fate of redox-sensitive trace elements (TEs; e.g. As, U, Cu, Cr) in natural systems is challenging. Colloids have been reported to control TEs speciation and catalyze TEs redox reactions in many aquatic environments. We hypothesize that the lack of accurate thermodynamic models that account for the role of colloids in TEs speciation explains our inability to predict their redox state distribution in the environment. The slow evolution of the colloidal compartment in response to the prevailing bio/hydro/pedo/climatological conditions need to be decoupled from the fast TEs redox reactions promoted by colloidal surfaces. Further progress is hampered by experimental and theoretical challenges associated with capturing the extreme physical and chemical heterogeneity of colloids, their metastable structures, and their dynamic transformation behavior.

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利用可陨落的天然胶体建立平衡表面络合模型:预测微量元素氧化态分布的关键?
预测自然系统中对氧化还原反应敏感的微量元素(如砷、铀、铜、铬)的行为和归宿具有挑战性。据报道,在许多水生环境中,胶体控制着痕量元素的标本化,并催化痕量元素的氧化还原反应。我们假设,由于缺乏准确的热力学模型来解释胶体在 TEs 分化中的作用,所以我们无法预测它们在环境中的氧化还原状态分布。需要将胶体与胶体表面所促进的快速 TEs 氧化还原反应分离开来,以了解胶体区块随当时的生物/水/气旋/气候条件而发生的缓慢演变。在捕捉胶体的极端物理和化学异质性、其可蜕变结构及其动态转化行为方面所面临的实验和理论挑战阻碍了进一步的研究进展。
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来源期刊
CiteScore
16.50
自引率
1.10%
发文量
74
审稿时长
11.3 weeks
期刊介绍: Current Opinion in Colloid and Interface Science (COCIS) is an international journal that focuses on the molecular and nanoscopic aspects of colloidal systems and interfaces in various scientific and technological fields. These include materials science, biologically-relevant systems, energy and environmental technologies, and industrial applications. Unlike primary journals, COCIS primarily serves as a guide for researchers, helping them navigate through the vast landscape of recently published literature. It critically analyzes the state of the art, identifies bottlenecks and unsolved issues, and proposes future developments. Moreover, COCIS emphasizes certain areas and papers that are considered particularly interesting and significant by the Editors and Section Editors. Its goal is to provide valuable insights and updates to the research community in these specialized areas.
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