Interactions between organic matter and Fe (hydr)oxides and their influences on immobilization and remobilization of metal(loid)s: A review

Bao, Yanping; Bolan, Nanthi; Lai, Jinhao; Wang, Yishun; Jin, Xiaohu; Kirkham, M.B.; Wu, Xiaohong; Fang, Zheng; Zhang, Yan; Wang, Hailong

doi:10.1080/10643389.2021.1974766

Cited by 89 publications

(30 citation statements)

References 104 publications

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“…The activity of inorganic phosphatases can be inhibited by some small organic molecules, e.g., citrate acid, due to the iron complex formation [26,88]. The interaction of organic matter and iron oxide nanoparticles is very complex [140][141][142], the catalytic capacity, on the other hand, can also be enhanced when metal oxide nanoparticles surface modified with some especially organic ligand, e.g., glutathione, dendrimer, DNA, and protein, based on the progress of nanozyme and metal-organic frameworks from the view of bioengineering [143][144][145][146][147].…”

Section: Examples and Importance Of Iron Architecturementioning

confidence: 99%

Introductory Chapter: Incredible Spicy Iron Oxide Nanoparticles

Huang¹

2022

Iron Oxide Nanoparticles

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Section: Examples and Importance Of Iron Architecturementioning

confidence: 99%

Introductory Chapter: Incredible Spicy Iron Oxide Nanoparticles

Huang¹

2022

Iron Oxide Nanoparticles

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“…Iron (Fe) oxyhydroxide represents a highly reactive and dynamic interface in soil–water environments. , Ubiquitous dissolved organic matter (DOM) readily interacts with Fe oxyhydroxide, and these interactions directly regulate the preservation of carbon in soils, , the fate of contaminants, as well as the biogeochemical cycling of nutrients and elements . Due to the highly heterogeneous chemical nature of DOM, the mechanisms of DOM molecular assembly on the mineral surfaces are intricate and subject to intense research focus .…”

Section: Introductionmentioning

confidence: 99%

Probing Molecular-Level Dynamic Interactions of Dissolved Organic Matter with Iron Oxyhydroxide via a Coupled Microfluidic Reactor and an Online High-Resolution Mass Spectrometry System

Zhu

Wang

Liu

et al. 2023

Environ. Sci. Technol.

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The interactions between dissolved organic matter (DOM) and iron (Fe) oxyhydroxide are crucial in regulating the biogeochemical cycling of nutrients and elements, including the preservation of carbon in soils. The mechanisms of DOM molecular assembly on mineral surfaces have been extensively studied at the mesoscale with equilibrium experiments, yet the molecular-level evolution of the DOM−mineral interface under dynamic interaction conditions is not fully understood. Here, we designed a microfluidic reactor coupled with an online solid phase extraction (SPE)-LC-QTOF MS system to continually monitor the changes in DOM composition during flowing contact with Fe oxyhydroxide at circumneutral pH, which simulates soil minerals interacting with constant DOM input. Time-series UV−visible absorption spectra and mass spectrometry data showed that after aromatic DOM moieties were first preferentially sequestered by the pristine Fe oxyhydroxide surface, the adsorption of nonaromatic DOM molecules with greater hydrophobicity, lower acidity, and lower molecular weights (<400) from new DOM solutions was favored. This is accompanied by a transition from mineral surface chemistry-dominated adsorption to organic−organic interactiondominated adsorption. These findings provide direct molecular-level evidence to the zonal model of DOM assembly on mineral surfaces by taking the dynamics of interfacial interactions into consideration. This study also shows that coupled microfluidics and online high-resolution mass spectrometry (HRMS) system is a promising experimental platform for probing microscale environmental carbon dynamics by integrating in situ reactions, sample pretreatment, and automatic analysis.

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“…As can also react with carboxyl/phenol groups in DOC to form ternary complexes with Fe and As. The mobility of As is regulated by free (uncomplexed) dissolved As, As–Fe-DOM colloids, and dissolved complexes [ 29 ].…”

Section: Introductionmentioning

confidence: 99%