Effect of low-molecular-weight organic acids on the distribution of mobilized Al between soil solution and solid phase

Li, Jiuyu; Xu, Runsheng; Tiwari, Diwakar; Ji, Guoliang

doi:10.1016/j.apgeochem.2006.06.013

Cited by 39 publications

(24 citation statements)

References 39 publications

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“…While a number of organic acids are present in soils (Jones, 1998;Li et al, 2006;Ganor et al, 2009), oxalate was chosen because its impacts on silicate dissolution have been well studied. Oxalic acid is also one of the most common LMW organic acids found in soils (Zinder et al, 1986;Furrer and Stumm, 1986;Jones, 1998;van Hees et al, 2000;Yoon et al, 2004;Johnson et al, 2004b;Ganor et al, 2009).…”

Section: Oxalate Input and Speciationmentioning

confidence: 99%

“…Furrer and Stumm (1986) proposed that mineral dissolution rates are a function of the concentration of organic ligands adsorbed to the mineral surfaces because adsorption of organic acids weakens the chemical bonds of the dissolving mineral structure (Amrhein and Suarez, 1988;Welch, 1993;Drever and Stillings, 1997;Jones, 1998;Li et al, 2006;Ganor et al, 2009). It is also possible, however, that adsorption of organic matter on mineral surfaces could slow mineral dissolution by limiting the availability of reactive surface sites (Johnson et al, 2004a(Johnson et al, , 2005Ganor et al, 2009).…”

Section: Introductionmentioning

confidence: 96%

“…Organic acids may influence local reaction rates through direct and/or indirect mechanisms ( Fig. 1), as summarized by Drever and Stillings (1997) and expanded on by others (Li et al, 2006;Ganor et al, 2009). These mechanisms include: (1) Organic-metal chelation and effects on reaction affinity.…”

Section: Introductionmentioning

confidence: 96%

“…The stability, solubility and transport of organic complexes in turn affect the kinetics and apparent thermodynamic equilibrium of geochemical reactions, and may control patterns of mineral precipitation and dissolution. For example, aqueous phase reactive organic matter, particularly low molecular weight (LMW) organic acids, are known to influence soil processes including nutrient mobilization (Neff et al, 2000;Lilienfein et al, 2004) and uptake (Marschner, 1995), dissolved metal and contaminant mobility (Li et al, 2006), and mineral weathering (Barman et al, 1992;Drever, 1994;Stillings et al, 1996;Drever and Stillings, 1997;Oelkers and Schott, 1998;Egli et al, 2008;Ganor et al, 2009;Oburger et al, 2009;Oelkers et al, 2011). The cycling of soil organic matter thus has the potential to influence development and propagation of soil horizons, with implications for the composition and productivity of terrestrial ecosystems: plant and microbial productivity relies upon both the supply and availability of inorganic http://dx.doi.org/10.1016/j.gca.2014.05.003 0016-7037/Published by Elsevier Ltd. nutrients including P, Ca, K, and Fe.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Modeling the influence of organic acids on soil weathering

Lawrence

Harden

Maher

2014

Geochimica et Cosmochimica Acta

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Section: Oxalate Input and Speciationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Modeling the influence of organic acids on soil weathering

Lawrence

Harden

Maher

2014

Geochimica et Cosmochimica Acta

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“…This result suggested that the same reactions can easily occur as those for Al translocation in the soil profile. Li et al (2006) reported that the capacity of lowmolecular-weight organic acids for Al mobilization in two acidic variable-charge soils (Ultisol and Oxisol) follows the order: citric acid > oxalic acid >malonic acid > malic acid > tartaric acid, etc. Low-molecularweight organic acids are ubiquitous in forest soils.…”

Section: Characteristics Of Oxalate-extractable Metals Affected By Mamentioning

confidence: 99%

Influence of historical manmade alterations on soil-forming processes in a former imperial estate (Shirogane-goryouchi), the Institute for Nature Study: Development of a soil evaluation technique and importance of inventory construction for urban green areas

Nobuo¹,

Murata

Watanabe

et al. 2015

Soil Science and Plant Nutrition

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The influence of historical land use on soil-forming processes was assessed in a former imperial estate (Shirogane-goryouchi), the Institute for Nature Study, as one of the urban green areas where many records on land use and vegetation history have been maintained. The area of study was divided into several subsections and categorized based on land use history. Results from a soil survey in each categorized area showed that Andosols were dominant across all areas, and that past construction activities, creation of artifacts, and soil cutting and banking resulted in a disruption of horizon sequences and shifts in soil components. Soil was characterized using chemical analyses of oxalate-extractable Al (Alo) and Fe (Feo), the melanic index (MI) of soil organic matter (SOM), and the carbon stable isotope ratio (δ 13 C) of soil. These parameters helped researchers assess the influence of land use on soil and vegetation over time. After land use ceased, newly accumulated organic horizons, the development of soil structures, and horizon differentiation due to forest regeneration were apparent. δ 13 C of soil suggested that SOM in surface horizon (A, A1) was primarily derived from present-day forest vegetation (C3 plants) with MI values >1.7. The origins of SOM in subsurface horizon (A2, AB) were mixed with present-day C3 plants and past grass vegetation from C4 plants. MI values were lower in subsurface horizons due to a higher degree of humification as compared to surface horizon values. The absence of fresh organic matter supply after deforestation and lack of soil material mixing between surface and subsurface horizons after land use changed affected the state of soil organic matter in the subsurface horizon. Alo leached from surface to deeper horizons via large inputs of organic material over the long term (approximately 400 years), even on sections of earthworks. Even though the soil in this urban green area had a complex land use history, it was still possible to evaluate the soils in terms of pedogenesis with a multidisciplinary approach that explored land use and vegetation history, and used soil surveys and soil chemical characteristics to answer our questions.

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Laboratory studies on the effect of adsorbed microbial extracellular polymeric substances on the acidity of selected variable‐charge soils

Nkoh

Hong

2021

Soil Science Soc of Amer J

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Extracellular polymeric substances (EPS) secreted by rhizobacteria are ubiquitous in the environment and can enhance the negative charge of variable‐charge soils. Soil negative charge is directly related to pH buffering capacity (pHBC); it is essential to examine the effect of EPS on soil acidity and pHBC. We investigated the effect of adsorbed EPS on the acidification of five variable‐charge soils in China, which were subjected to different land use: an Oxisol and four Ultisols. Spectroscopic analysis revealed that EPS was specifically adsorbed onto soil surfaces through iron–oxygen–phosphorus/aluminum–oxygen–phosphorus (Fe‐O‐P/Al‐O‐P) bonds formed between phosphoryl groups of EPS and soil Al/Fe oxides. During the formation of Fe‐O‐P/Al‐O‐P bonds, there was ligand exchange between the EPS phosphoryl groups and the surface hydroxyl groups of Fe/Al oxides of the soils. The released OH– played an important role in soil acidity amelioration by the adsorbed EPS through neutralizing H+ and increasing soil suspension pH. After acidification, the pH of EPS‐treated soils was higher than that of the controls. This was attributed to a combined effect of enhanced soil pHBC, and protonation of organic anions (e.g., COO– to COOH) of EPS to decrease the activity of protons. The adsorbed EPS ameliorated prior soil acidity, inhibited new soil acidification, and promoted hydrolysis and re‐adsorption of Al. This was evident as the proportion of organically bound Al and adsorbed hydroxyl Al increased, whereas that of exchangeable Al decreased after EPS adsorption. Therefore, this study can serve as a reference for the molecular design of cost‐effective and environmentally friendly amendments for acid soils.

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Effect of low-molecular-weight organic acids on the distribution of mobilized Al between soil solution and solid phase

Cited by 39 publications

References 39 publications

Modeling the influence of organic acids on soil weathering

Modeling the influence of organic acids on soil weathering

Influence of historical manmade alterations on soil-forming processes in a former imperial estate (Shirogane-goryouchi), the Institute for Nature Study: Development of a soil evaluation technique and importance of inventory construction for urban green areas

Laboratory studies on the effect of adsorbed microbial extracellular polymeric substances on the acidity of selected variable‐charge soils

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