Effects of NH4+, K+, Mg2+, and Ca2+ on the Cesium Adsorption/Desorption in Binding Sites of Vermiculitized Biotite

Yin, Xiangbiao; Wang, Xinpeng; Wu, Hao; Takahashi, Hideharu; Inaba, Yusuke; Ohnuki, Toshihiko; Takeshita, Kenji

doi:10.1021/acs.est.7b04922

Cited by 34 publications

(11 citation statements)

References 55 publications

(117 reference statements)

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“…DNA–mica binding energies, as a function of MgCl 2 concentration, show a maximum value at 10 mM (Figure F). There are two possible reasons for the weak DNA–mica binding at a relatively low MgCl 2 concentration (≤ 1 mM): (1) the electric double layer repulsion between the negative DNA and negative mica prevents DNA binding to mica in low MgCl 2 concentrations, and (2) the mica surface binds less divalent cations (Mg 2+ ), which work as bridging ions between DNA and mica surface sites . The increase of IS to 10 mM (MgCl 2 ) leads to a reduction of Debye screening length and removes the electrostatic repulsion between DNA and mica .…”

Section: Discussionmentioning

confidence: 99%

“…There are two possible reasons for the weak DNA−mica binding at a relatively low MgCl 2 concentration (≤ 1 mM): (1) the electric double layer repulsion between the negative DNA and negative mica prevents DNA binding to mica in low MgCl 2 concentrations, and (2) the mica surface binds less divalent cations (Mg 2+ ), which work as bridging ions between DNA and mica surface sites. 36 The increase of IS to 10 mM (MgCl 2 ) leads to a reduction of Debye screening length λ = ( ) l 0.33 IS and removes the electrostatic repulsion between DNA and mica. 37 In addition, the hydration ability of DNA molecules and a mica surface tends to reduce with increasing MgCl 2 concentrations, that is, the dehydration effect results in DNA adsorbing to mica.…”

Section: ■ Discussionmentioning

confidence: 99%

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Molecular-Scale Investigations Reveal Noncovalent Bonding Underlying the Adsorption of Environmental DNA on Mica

Zhai

Wang

Putnis

2019

Environ. Sci. Technol.

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Mineral–soil organic matter (SOM including DNA, proteins, and polysaccharides) associations formed through various interactions, play a key role in regulating long-term SOM preservation. The mechanisms underlying DNA–mineral and DNA–protein/polysaccharide interactions at nanometer and molecular scales in environmentally relevant solutions remain uncertain. Here, we present a model mineral–SOM system consisting of mineral (mica)–nucleic acid (environmental DNA, eDNA)/protein (bovine serum albumin)/polysaccharide (alginate), and combine atomic force microscopy (AFM)-based dynamic force spectroscopy and PeakForce quantitative nanomechanical mapping using DNA-decorated tips. Single-molecule binding and adhesion force of eDNA to mineral and to mineral adsorbed by protein/polysaccharide reveal the noncovalent bonds and that systematically changing ion compositions, ionic strength, and pH result in significant differences in organic–organic and organic–mineral binding energies. Consistent with the bond-strength measurements, protein, rather than polysaccharide, promotes mineral-bound DNA molecules by ex situ AFM deposition observations in relatively high concentrations of divalent cation-containing acidic solutions. These molecular-scale determinations and nanoscale observations should substantially improve our understanding of how environmental factors influence the organic–mineral interfacial interactions through the synergy of collective noncovalent and/or covalent bonds in mineral–organic associations.

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Section: Discussionmentioning

confidence: 99%

Section: ■ Discussionmentioning

confidence: 99%

Molecular-Scale Investigations Reveal Noncovalent Bonding Underlying the Adsorption of Environmental DNA on Mica

Zhai

Wang

Putnis

2019

Environ. Sci. Technol.

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“…Bray 等 [35] 通过计算得到的黑云母的pH PZC 为7.5, Alonso 等 [36] 报道的黑云母的pH PZC 为6.0~7.0之间, 这些结果与本文的结果基本是一致的. 表 2 Sr 2+ 吸附在黑云母上的准一级和准二级动力学模型参数 [29,45] . 由于水合的Ca…”

Section: 黑云母的表面酸、碱性质unclassified

The sorption of strontium on biotite and some influencing factors

Xian¹,

Niu²,

Liu³

et al. 2020

Sci. Sin.-Chim

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The effect of ionic strength, pH, temperature and co-existing ions on the sorption of Sr 2+ on biotite was investigated by batch technique. The results showed that the sorption of Sr 2+ on biotite was ignorable at pH range from 3.0 to 5.0, and then increased sharply with the increase of pH from 5.0 to 10.0. Besides, the sorption percentage of Sr 2+ on biotite significantly decreased with the increase of ionic strength. The sorption kinetics and isotherms of Sr 2+ on biotite can be well fitted by pseudo-second-order kinetic model and Freundlich model, respectively. The results of XPS analysis indicated that Sr 2+ was mainly complexed with the iron hydroxyl on the surface of the biotite.

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“…The adsorption of metal ions at the surface of clay minerals has been reported extensively from experiments, − such as X-ray diffraction, X-ray photoelectron spectroscopy, and total internal reflection microscopy. However, these experimental tools are hardly applicable to determine exclusively the adsorption at the external surfaces, which can be readily complemented by computational modeling.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Cesium at the External Surface of TOT Type Clay Mineral: Effect of the Interlayer Cation and the Hydrated State

Liu²,

Zhang

2019

J. Phys. Chem. C

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The adsorption at the clay−water interface plays a critical role in many chemical, environmental, and geological processes as well as technological applications. Adsorption at the external surface and in the clay interlayer has been widely studied, whereas the relationship between them is always overlooked. Here, we specifically addressed the effect of the interlayer on the adsorption of Cs + ions at the external surface of 2:1 tetrahedral SiO 4 (T) and octahedral AlO 6 (O) sheet (TOT)-type clay mineral using molecular dynamics simulation, considering the absence and presence of the clay interlayer, three interlayer cations, and four hydrated states. It is not recommended to use a single clay layer to predict the adsorption at the external surface of TOT-type clay mineral because the absence of the clay interlayer will overestimate the adsorption affinity. Further studies suggested that adsorption of Cs + at the external surface depends sensitively on the nature of the interlayer cation and the hydrated state. The stability of external Cs + ions was affected by the interlayer cation and increased as Na + < K + < Cs + , which is caused by the different interactions of the interlayer cation and clay layers. The hydrated state of the clay interlayer also exerts a significant effect and the stability of Cs + at the external surface is enhanced in the order of 1W < 2W < 3W, determined by the interlayer water rather than the interlayer cation according to results of energy analysis. The present work may provide a new insight into the understanding of interfacial chemistry between clay minerals and aqueous solutions and further the accurate assessment of geochemical behavior of elements.

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Effects of NH₄⁺, K⁺, Mg²⁺, and Ca²⁺ on the Cesium Adsorption/Desorption in Binding Sites of Vermiculitized Biotite

Cited by 34 publications

References 55 publications

Molecular-Scale Investigations Reveal Noncovalent Bonding Underlying the Adsorption of Environmental DNA on Mica

Molecular-Scale Investigations Reveal Noncovalent Bonding Underlying the Adsorption of Environmental DNA on Mica

The sorption of strontium on biotite and some influencing factors

Adsorption of Cesium at the External Surface of TOT Type Clay Mineral: Effect of the Interlayer Cation and the Hydrated State

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