Adsorption behavior of oxalic acid at water–feldspar interface: experiments and molecular simulation

Xue, Xiaopeng; Wang, Wei; Fan, Hao; Xu, Zhonghao; Pedruzzi, Israel; Li, Ping; Yu, Jianguo

doi:10.1007/s10450-019-00111-8

Cited by 25 publications

(10 citation statements)

References 47 publications

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“…46 2− are innersphere adsorption and prefer to coordinate with Al active site rather than Si active site on feldspar surface. 47 The uptake coefficients in Table 4 show that the BET uptake coefficient of acids on Al 2 O 3 , TiO 2 , is generally around 10 −7 about 2−3 magnitudes lower than that on quartz, kaolinite, and Na-montmorillonite. Metal oxides such as TiO 2 and Al 2 O 3 have little effect on the total initial BET uptake coefficient, while calcite could increase the total initial BET uptake coefficient on the mineral dust aerosols significantly.…”

Section: ■ Results and Discussionmentioning

confidence: 97%

“…Generally, molecular state organic acids could influence the physical adsorption process. For example, oxalic acid in water solution has three configurations (H 2 C 2 O 4 , HC 2 O 4 – , and C 2 O 4 2– ) at different pH, which could adsorb on feldspar surface to promote the mineral dissolution, and adsorption of H 2 C 2 O 4 on feldspar surface is physical outersphere adsorption with hydrogen bond formation while adsorption of HC 2 O 4 – and C 2 O 4 2– are innersphere adsorption and prefer to coordinate with Al active site rather than Si active site on feldspar surface …”

Section: Results and Discussionmentioning

confidence: 99%

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Heterogeneous Uptake of Formic Acid and Acetic Acid on Mineral Dust and Coal Fly Ash

Wang

Zhou

Wang

et al. 2020

ACS Earth Space Chem.

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The heterogeneous uptake of formic acid and acetic acid on mineral dust and coal fly ash was investigated using Knudsen cell reactor over the temperature range from 263 to 298 K. The uptake of formic acid and acetic acid on Inner Mongolia desert, Arizona test dust, and coal fly ash was mainly physical adsorption, while the uptake process on Xinjiang sierozem was the combination of physical adsorption and chemical adsorption as it contained a considerable amount of calcite. Uptake coefficients of formic acid and acetic acid on mineral dust increased with the content of element Si, aluminosilicate, and/or quartz in mineralogy, but the uptake coefficients on coal fly ash were smaller than that on mineral dust, which was controlled by the chemical components and microstructure. Compared with formic acid, uptake coefficients of acetic acid were higher on mineral dust and coal fly ash, especially in the low temperature regions. The atmospheric implications of formic acid and acetic acid on mineral dust aerosols are also discussed.

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Section: ■ Results and Discussionmentioning

confidence: 97%

Section: Results and Discussionmentioning

confidence: 99%

Heterogeneous Uptake of Formic Acid and Acetic Acid on Mineral Dust and Coal Fly Ash

Wang

Zhou

Wang

et al. 2020

ACS Earth Space Chem.

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“…The orthoclase/(sanidine + albite) ratio reached the maximal value of ~ 1 (sample 72843), while potassium feldspar of primary rhyolites is known presenting in at least twice the amount of plagioclase. Due to the low amount, only weak bending bands ~ 727 cm −1 for AlO and ~ 1010 cm −1 for SiO of orthoclase could be verified for some samples, such as sample 72843 (with the highest amount of orthoclase) (follows the description of Xue et al 2019). Some fresh feldspars, such as particles in Fig.…”

Section: Chemical Petrographical and Mineral Compositionsmentioning

confidence: 97%

Clay mineral formation in Permian rocks of a geothermal borehole at Northern Upper Rhine Graben, Germany

Nguyen-Thanh

Mählmann

Hoang-Minh

et al. 2021

Int J Earth Sci (Geol Rundsch)

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Hydrothermally altered rhyolite rocks in the Permian Donnersberg Formation of a geothermal borehole in the Northern Upper Rhine Graben (Germany) were investigated to find out answers for the low hydraulic conductivity of the rocks. The composition of clay minerals and the temperature of smectite–illite transformation were carried out using X-ray diffraction, X-ray fluorescence, transmission electron microscopy, Fourier transform infrared spectroscopy, and polarized-light microscopy analyses. Clay mineral (CM) composition includes illite/muscovite (1M and 2M1 polytypes), illite–smectite interstratifications (IS-ml), smectite, and chlorite; and non-clay minerals such as quartz, feldspars, epidote, calcite, dolomite, and hematite were detected. The 2M1-polytype mica might be the only primary sheet silicates from the parent rocks, while the others occur as authigenic neo-formed CMs under heat flow and geothermal gradient. The development of CMs indicates different mechanisms of illitization and smectitization. Based on the texture, morphology, structure/polytype, and chemistry of rocks and minerals, in particular CMs, the study grouped the CM formation into three transformation processes: smectitization during magma cooling and possible contact metamorphisms with decreasing and low temperature, smectite illitization controlled by burial diagenesis and hydrothermal alteration, and illite smectitization followed exhumation and Cenozoic subsidence with decreasing temperature. The rhyolites were altered to all of the orders IS-R0, IS-R1, and IS-R3 by the dissolution-precipitation and layer-to-layer mechanisms. The first one supported small xenomorphic plates and flakes of 1Md, elongated particles of 1M, and pseudo-hexagonal forms of 2M1. The second one could lead to the platy particles of 1Md and 2M1 polytypes. The dominant temperature range for the transformation in the area has been 140–170 °C– ~ 230 °C.

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“…At pH ≤ 3 the main process responsible for the intense degradation of biotite surface must be the capacity of the organic ligand to form inner-sphere surface complexes involving both carboxyl groups of the oxalic acid (single protonated (HOx -) and fully deprotonated (Ox 2-)) with tetrahedral (>AlOH and >AlOH 2 + ) and octahedral (>Mg-FeOH and >Mg-FeOH 2 + ) edge surface sites (Ganor et al, 2009). These processes have been studied at the molecular level for feldspar dissolution in oxalic acid (pH 0-6) by molecular dynamic simulations (Xue et al, 2019) Ganor et al (2009) defined the enhancement ratio as the ratio between dissolution rate with organic matter and dissolution rate without organic acids (for the same temperature and pH). Based on a number of studies on the effect of oxalic acid on dissolution of aluminosilicates, it has been shown that the enhancement ratio can be up to 10 (e.g., Zhang and Jun, 2015), but is usually less than 3 with a median value of only 2, indicating that the catalytic effect of oxalate is generally relatively small.…”

Section: The Effect Of Oxalic Acid On the Biotite Dissolution Ratementioning

confidence: 99%

Biotite reactivity in nitric and oxalic acid at low temperature and acid pH from surface and bulk dissolution measurements

et al. 2020

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Adsorption behavior of oxalic acid at water–feldspar interface: experiments and molecular simulation

Cited by 25 publications

References 47 publications

Heterogeneous Uptake of Formic Acid and Acetic Acid on Mineral Dust and Coal Fly Ash

Heterogeneous Uptake of Formic Acid and Acetic Acid on Mineral Dust and Coal Fly Ash

Clay mineral formation in Permian rocks of a geothermal borehole at Northern Upper Rhine Graben, Germany

Biotite reactivity in nitric and oxalic acid at low temperature and acid pH from surface and bulk dissolution measurements

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