Amorphous Aluminum Hydroxide Control on Sulfate and Phosphate in Sediment-Solution Systems

Navrátil, Tomáš; Rohovec, Jan; Amirbahman, Aria; Norton, Stephen A.; Fernandez, Ivan J.

doi:10.1007/s11270-008-9929-z

Cited by 20 publications

(7 citation statements)

References 37 publications

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“…We hypothesize that the pattern of Al and P chemistry across this pH range results from lower rates of illuvial Al hydroxide accumulation in the B horizons at lower pH due to conditions favoring higher Al solubility (Drever, 1997;Norton et al, 2006). Th e higher anion adsorption capacity of Al hydroxide at the lower pH, however, would increase the P retention through an increased anion adsorption capacity due to greater protonation of Al hydroxide (Mattingly, 1975;Kana and Kopáček, 2005;Navrátil et al, 2008). Th is eff ect would be consistent with the lower Al NaOH-25 /P NaOH-25 ratio at lower pH values (Fig.…”

Section: Linkages Between Soil Phosphorus and Phosphorus Availabilitymentioning

confidence: 99%

Phosphorus in Soils of Temperate Forests: Linkages to Acidity and Aluminum

SanClements

Fernandez

Norton

2010

Soil Science Soc of Amer J

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Section: Linkages Between Soil Phosphorus and Phosphorus Availabilitymentioning

confidence: 99%

Phosphorus in Soils of Temperate Forests: Linkages to Acidity and Aluminum

SanClements

Fernandez

Norton

2010

Soil Science Soc of Amer J

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“…They showed that the dominant chemical fraction of P in a study of six watersheds in the eastern United States and Europe of soils under temperate forests was (i) associated with secondary Al and organic phases and (ii) responsive to experimental acidification. They suggested that bioavailability of P increases when soils are getting acidified due to increased mobilization of formerly protonated Al oxyhydroxides which are known to have a high anion adsorption capacity (Navratil et al, 2008;Kaňa et al, 30 2011). Probably, a significant fraction of P is released and translocated as colloidal P, as reported for two sandy model systems by Ilg et al (2008).…”

Section: Effects Of Pedogenesis and Podzolization On Spatial Pattementioning

confidence: 99%

Spatial Patterns of Phosphorus Fractions in Soils of Temperate Forest Ecosystems with Silicate Parent Material

Werner

Haye

Spielvogel

et al. 2016

Preprint

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Abstract. The stage of pedogenesis is a crucial indicator describing phosphorus (P) distribution, but also governing spatial 10 P distribution patterns. Here, we assessed spatial patterns of P fractions and major P binding partners (e.g. organic C, pedogenic Fe and Al minerals) in a geosequence to describe spatial and pedogenetic changes of P distribution and to identify mechanisms for these changes. We found, that the distribution of total P was generally best matched by the distribution pattern of organic P, both showing decreasing content from the top-to the subsoil. Inorganic P was mainly ascribed as bound in unweathered rock at all sites, but with decreasing importance in later stages of pedogenesis. The pedogenetically young 15 soil at Bad Brückenau also showed adsorbed inorganic P in the topsoil, probably due to high mineralization of organic P.Soil organic matter (SOM)-sesquioxide-complexes, as well as Al and Fe oxyhydroxides were identified as main binding partners of organic P at all stages of pedogenesis. With depth, the correlations of various P fractions with SOM decreased, whereas those with pedogenic Fe and Al oxyhydroxides increased. The change of sorbent is due to the mobilization of first Al, and in later stages of pedogenesis, of Fe in the topsoil. Both metals and its oxyhydroxides (Al(OH) i , Fe(OH) i ) probably 20 formed strong complexes with SOM and therefore retained P in the pedon. Due to the heterogeneous P distribution, our results suggest a differing ecosystem P nutrition strategy at each of our sites: from acquiring inorganic P from weathered primary rock to minimizing loss of organic P by recycling. We argue that even in early stages of pedogenesis, P recycling is a major driver of ecosystem P nutrition, however not as important as in later stages. We conclude that the stage of pedogenesis in silicate soils, as e.g. visible in degree and state of podzolization, serves as predictor for plant and microbial P 25 nutritional strategies.

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“…However, the high discharge monthly mean SO 2− 4 concentrations in October to December for 1996-2006 were nearly the same as for the 1990-1995 period, probably as a result of increasing soil SO 2− 4 adsorption capacity due to soil acidification along the shallow flowpaths (Nodvin et al 1986). Either the number of adsorption sites associated with soil hydroxides of Al and Fe along the shallow flowpaths had increased or anion adsorption capacity increased due to increasing positive surface charge of the sorbing materials, including Al and Fe hydroxides (Navrátil et al 2009). …”

Section: Water Runof Fmentioning

confidence: 99%

Twenty-year inter-annual trends and seasonal variations in precipitation and stream water chemistry at the Bear Brook Watershed in Maine, USA

Navrátil

Norton

Fernandez

et al. 2010

Environ Monit Assess

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Mean annual concentration of SO4(-2) in wet-only deposition has decreased between 1988 and 2006 at the paired watershed study at Bear Brook Watershed in Maine, USA (BBWM) due to substantially decreased emissions of SO(2). Emissions of NO(x) have not changed substantially, but deposition has declined slightly at BBWM. Base cations, NH4+, and Cl(-) concentrations were largely unchanged, with small irregular changes of <1 μeq L(-1) per year from 1988 to 2006. Precipitation chemistry, hydrology, vegetation, and temperature drive seasonal stream chemistry. Low flow periods were typical in June-October, with relatively greater contributions of deeper flow solutions with higher pH; higher concentrations of acid-neutralizing capacity, Si, and non-marine Na; and low concentrations of inorganic Al. High flow periods during November-May were typically dominated by solutions following shallow flow paths, which were characterized by lower pH and higher Al and DOC concentrations. Biological activity strongly controlled NO3- and K(+). They were depressed during the growing season and elevated in the fall. Since 1987, East Bear Brook (EB), the reference stream, has been slowly responding to reduced but still elevated acid deposition. Calcium and Mg have declined fairly steadily and faster than SO4(-2), with consequent acidification (lower pH and higher inorganic Al). Eighteen years of experimental treatment with (NH(4))(2)SO(4) enhanced acidification of West Bear Brook's (WB) watershed. Despite the manipulation, NH4+ concentration remained below detection limits at WB, while leaching of NO3- increased. The seasonal pattern for NO3- concentrations in WB, however, remained similar to EB. Mean monthly concentrations of SO4(-2) have increased in WB since 1989, initially only during periods of high flow, but gradually also during base flow. Increases in mean monthly concentrations of Ca(2+), Mg(2+), and K(+) due to the manipulation occurred from 1989 until about 1995, during the depletion of base cations in shallow flow paths in WB. Progressive depletion of Ca and Mg at greater soil depth occurred, causing stream concentrations to decline to pre-manipulation values. Mean monthly Si concentrations did not change in EB or WB, suggesting that the manipulation had no effect on mineral weathering rates. DOC concentrations in both streams did not exhibit inter- or intra-annual trends.

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Amorphous Aluminum Hydroxide Control on Sulfate and Phosphate in Sediment-Solution Systems

Cited by 20 publications

References 37 publications

Phosphorus in Soils of Temperate Forests: Linkages to Acidity and Aluminum

Phosphorus in Soils of Temperate Forests: Linkages to Acidity and Aluminum

Spatial Patterns of Phosphorus Fractions in Soils of Temperate Forest Ecosystems with Silicate Parent Material

Twenty-year inter-annual trends and seasonal variations in precipitation and stream water chemistry at the Bear Brook Watershed in Maine, USA

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