Article

Comparison of water-soluble and exchangeable forms of Al in acid forest soils

Department of Soil Science and Geology, Czech University of Agriculture in Prague, Kamycka 129, CZ165 21 Prague 6--Suchdol, Czech Republic.
Journal of Inorganic Biochemistry (Impact Factor: 3.27). 10/2005; 99(9):1788-95. DOI: 10.1016/j.jinorgbio.2005.06.024
Source: PubMed

ABSTRACT Soil acidification promotes Al release from minerals and parent bedrocks; it also affects Al mobilization and speciation. Speciation of KCl extractable and water-extractable Al in forest soils was done by means of HPLC/IC method. Species Al3+ were the most abundant Al forms in the KCl extracts (around 93%). Prevailing Al forms (more than 70%) in aqueous extracts were Al(X)1+, [i.e., Al(OH)2+, Al(SO4)+, AlF2+, Al(oxalate)+, Al(H-citrate)+, etc.] species. It is assumed that most of KCl and water-extractable Al is bound in soil sorption complex (i.e., highly dispersed colloidal fraction of the soil solid phase creating negative charge) where majority of Al exists in the form of Al3+ species. The ECEC values, total carbon content and parameters related to soil organic matter composition (N and S content) have apparent effect on Al speciation. The most toxic Al3+ species are more concentrated in the B horizons compared to the A and E horizons. Aqueous extracts simulate Al release to soil solution under normal conditions; it can thus exhibit the actual Al toxicity. On the other hand, KCl extraction describes a potential threat for case of strong disturbance of natural soil conditions.

Download full-text

Full-text

Available from: Jirina Száková, May 28, 2014
1 Follower
 · 
112 Views
  • Source
    • ") from soil solution. Only a small fraction of the total Na, Al, Fe, Mn, Cu and Si is present in soil solution and, depending on the soil type, the majority of these elements are present on exchangeable sites and in minerals (Drabek et al. 2005; Levy and Shainberg 2005; Mengel and Kosegarten 2005; Shuman 2005; Carrillo-González et al. 2006). Ammonium (one of the major components of LTRs) deposition is able to mobilize cations ( "
    [Show abstract] [Hide abstract]
    ABSTRACT: Long term fire retardant (LTR) application for forest fire prevention purposes as well as wildland fires can result in chemical leaching from forest soils. Large quantities of sodium (Na), aluminium (Al), iron (Fe), manganese (Mn), copper (Cu) and silicon (Si) in leachates, mainly due to ammonium (one of the major LTR components) soil deposition, could affect the groundwater quality. The leaching of Na, Al, Fe, Mn, Cu and Si due to nitrogen based LTR application (Fire Trol 931) was studied at laboratory scale. The concentrations of Na(+), Al(3+), Fe(3+)/Fe(2+), Mn(2+), Cu(2+) and Si(4+) were measured in the resulting leachates from pots with forest soil and pine trees alone and in combination with fire. The leaching of Na, Fe and Si from treated pots was significantly greater than that from control pots. The leaching of Al, Mn and Cu was extremely low.
    Bulletin of Environmental Contamination and Toxicology 04/2014; 92(6). DOI:10.1007/s00128-014-1266-x · 1.22 Impact Factor
  • Source
    • "Aluminium toxicity to plants decreases in this order: Al 3+ >Al(OH) 2 + >Al(OH) 4 − (Drabek et al. 2005). Early studies also deal with aluminium/calcium ratio index in soil solution as an indicator of soil vitality. "
    [Show abstract] [Hide abstract]
    ABSTRACT: Concentrated Animal Feeding Operation activities lead to soil degradation in vicinity with the livestock breeding facilities, mainly due to ammonia emissions from the various stages of the process. In this research, the soil degradation effects of an inten-sive hog farming operation (IHFO) located at a Med-iterranean limestone soil coastal area, have been investigated. Soil samples of the upper mineral soil were taken in various distances (10–1,500 m) and directions from the IHFO boundaries. Thirteen ex-perimental cycles were carried out in the duration of 1.5 years starting in March 2009 until October 2010. The soil samples were analysed on total, exchangeable and water-soluble Al, Fe and Mn. Significantly higher concentrations of the exchangeable and water-soluble Al, Fe and Mn were observed on soil samples at increasing proximity downwind from the farm (south). Southern soil average concentrations of exchangeable Al 3+ , Fe 3+ and Mn 2+ ranged between 3.56 and 7.45 mmol Al 3+ kg −1 soil, 5.85 and 7.11 mmol Fe 3+ kg −1 soil and 2.36 and 5.03 mmol Mn 2+ kg −1 soil, respectively. Southern soil average concentrations of water-soluble Al, Fe and Mn forms ranged between 1.1 and 4.6 ppm Al, 0.5 and 0.8 ppm Fe and 0.4 and 1 ppm Mn, respectively. Keywords East Mediterranean . Environmental impacts . Intensive hog farming operations . Soil mobilisation of Al . Fe and Mn
    Water Air and Soil Pollution 11/2012; 223(9). DOI:10.1007/s11270-012-1324-0 · 1.69 Impact Factor
  • Source
    • "Recalculations to dry sample weight a Under determination limit of the used analytical methods 156 Biogeochemistry (2010) 101:151–163 123 Author's personal copy showed that LMMOAs constitute a maximum of 10% of total DOC in forest soils under different vegetation cover. Al 3? species is not correlated to DOC (p = 0.162) as it is not bound on organic substances; it is formed only by Al 3? and transformed hydroxyl Al polymers (Drábek et al. 2005). The correlation between Al H 2 O measured by means of ICP-OES and DOC was weaker than the correlation between DOC and Al(X) 1? and Al(Y) 2? species. "
    [Show abstract] [Hide abstract]
    ABSTRACT: The Jizera Mountains area is affected by natural and anthropogenic acidification processes. The effect of acidification is reflected by presence of elevated amount of different Al forms in soil horizons. Changes of water extractable forms of Al (total \textAl\textH2 \textO {\text{Al}}_{{{\text{H}}_{2} {\text{O}}}} , species: Al(X)1+, Al(Y)2+ and Al3+) and other soil characteristics (e.g. DOC, pH) were investigated in forest soils from April to October 2008. Seasonal changes of Al forms were identified in organic F and H soil horizons. No significant effect of the soil type on Al forms was documented. Nevertheless, influence of vegetation cover (beech and spruce forest, clear-cut area) on Al(X)1+, Al(Y)2+ forms was proved. The results show that binding and mobility of Al forms are controlled mostly by pH and dissolved organic carbon (DOC). KeywordsAcidification-Aluminium speciation-Forest soil-Seasonal variation-Vegetation cover
    Biogeochemistry 12/2010; 101(1):151-163. DOI:10.1007/s10533-010-9450-5 · 3.73 Impact Factor
Show more