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Sorption of Dissolved Organic Carbon by Ceramic P 80 Suction Cups
Author(s) -
Guggenberger Georg,
Zech Wolfgang
Publication year - 1992
Publication title -
zeitschrift für pflanzenernährung und bodenkunde
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 87
eISSN - 1522-2624
pISSN - 0044-3263
DOI - 10.1002/jpln.19921550213
Subject(s) - dissolved organic carbon , suction , sorption , chemistry , ceramic , percolation (cognitive psychology) , total organic carbon , carbon fibers , soil water , geology , environmental chemistry , materials science , soil science , composite material , organic chemistry , adsorption , thermodynamics , physics , neuroscience , biology , composite number
Comparison is made between the chemical composition of acid soil solutions percolated through new, acid‐washed ceramic P 80 suction cups, and old, over 3 years field‐equilibrated suction cups with respect to quantitative and qualitative changes of dissolved organic carbon (DOC). While new suction cups sorb DOC in significant amounts with hydrophobic constituents preferred, field‐equilibrated suction cups alter DOC neither in concentration nor in composition. But at changes of DOC concentrations a percolation volume of 300 ml is necessary for reaching equilibrium. It is, therefore, concluded that field‐equilibrated ceramic P 80 suction cups can be used for collecting DOC from mineral B and C horizons of acid forest soils, where DOC concentrations remain constant. In contrast, the suction cups investigated are unsuitable for collecting A horizon solutions, which show greater variations in DOC concentration.