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Sulfate pools in the weathered substrata of a forested catchment

Title data

Manderscheid, Bernhard ; Schweisser, Thomas ; Lischeid, Gunnar ; Alewell, Christine ; Matzner, Egbert:
Sulfate pools in the weathered substrata of a forested catchment.
In: Soil Science Society of America Journal. Vol. 64 (2000) Issue 3 . - pp. 1078-1082.
ISSN 0361-5995
DOI: https://doi.org/10.2136/sssaj2000.6431078x

Abstract in another language

The mitigating effect of decreasing anthropogenic SO4 deposition on acidified soils and waters can be delayed by the release of previously stored soil SO4. We investigated SO4 pools and desorption in the weathered substrata (0.5-10 m depth) of a forested catchment on granite to quantify the importance of these layers to SO4 dynamics. Solid-phase materials from 10 boreholes to a maximum depth of 10 m were analyzed for water- and phosphate-extractable SO4, SO4 desorption, cation-exchange capacity (CEC), pH, and dithionite- and oxalate-extractable (Fe (Fed and Feo) and Al (Ald and Alo). Seven of the investigated boreholes were used to monitor water table depth and to obtain samples for measurement of solution SO4 concentrations. The storage of phosphate-extractable SO4 in the weathered substrata was estimated at 90 kmol ha-1, of which about 50 kmol ha-1 were water soluble. Sulfate pools and their desorption behavior were highly variable, which could partly be explained by the variation of pH and extractable Fe and Al contents of the samples. Sulfate concentrations in groundwater were dependent on the depth of groundwater table and correspondend with the depth gradients of solid-phase SO4. The SO4 pools of the substrata were apparently regulation solution concentrations. Thus, groundwater acidification in such aquifers will not be easily reversed by decreasing SO4 because of the release of previously stored SO4.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER7153
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Ecological Modelling
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Soil Ecology
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Former Professors > Chair Soil Ecology - Univ.-Prof. Dr. Egbert Matzner
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 22 Oct 2015 07:29
Last Modified: 22 Oct 2015 07:29
URI: https://eref.uni-bayreuth.de/id/eprint/20663