Data on Selective adsorption of terrestrial dissolved organic matter to inorganic surfaces along a boreal inland water continuum Data on Selective adsorption of terrestrial dissolved organic matter to inorganic surfaces along a boreal inland water continuum 2024-285-1 https://doi.org/10.57804/h4s1-we41 Swedish National Data Service Svensk nationell datatjänst Landing page Data on Selective adsorption of terrestrial dissolved organic matter to inorganic surfaces along a boreal inland water continuum Data on Selective adsorption of terrestrial dissolved organic matter to inorganic surfaces along a boreal inland water continuum 2024-285-1 https://doi.org/10.57804/h4s1-we41 Groeneveld, Marloes Groeneveld, Marloes Swedish National Data Service Svensk nationell datatjänst Landing page Different processes contribute to the loss or transformation of dissolved organic matter (DOM) and change DOM concentration and composition systematically along the inland water continuum. Substantial efforts have been made to estimate the importance of microbial and photochemical degradation for DOM concentration and composition and, to some extent, also DOM losses by flocculation, whereas the significance of DOM adsorption to inorganic surfaces has received less attention. Hence, knowledge on the possible extent of adsorption, its effect on DOM loads and composition and on where along the aquatic continuum it might be important is currently limited or lacking altogether. Here, we experimentally determine DOM adsorption onto mineral particles in freshwater ecosystems covering a water residence time gradient in boreal landscape Sweden. We hypothesized that adsorption would gradually decrease with increasing water residence time, but actually found that DOM is highly susceptible to adsorption throughout the aquatic continuum. Mass spectrometry and fluorescence analysis on DOM suggest that freshly produced aquatic DOM is less susceptible to adsorption than more terrestrial material. Moreover, the percentage DOM adsorbed in the experiments greatly exceeds the actual adsorption taking place in boreal inland waters across all studied systems. These results illustrate the potential impact of mineral erosion, for example as a result of agriculture, mining or forestry practices, on the availability, transport and composition of organic carbon in inland waters. We collected water samples from 30 sites distributed throughout Sweden and studied the effect of adsorption to mineral particles on dissolved organic matter composition. The data set belongs to a manuscript accepted by the Journal of Geophysical Research - Biogeosciences. The data set contains fluorescence and mass spectrometry data from all 30 sites before and after adsorption: - corrected EEMs of 180 samples (30 samples, triplicates, before and after adsorption treatment) - PARAFAC model of the 180 EEMs - compiled mass spectrometry data (30 samples, before and after adsorption treatment) The dataset was originally published in DiVA and moved to SND in 2024. Data innehåller: - korrigerade EEM av 180 prover (30 prover, triplikat, före och efter adsorptionsbehandling) - PARAFAC-modell av de 180 EEM:erna - sammanställda masspektrometridata (30 prover, före och efter adsorptionsbehandling) Se engelsk version av denna katalogpost för mer information. Datasetet har ursprungligen publicerats i DiVA och flyttades över till SND 2024. Numeric Text Access to data through SND. Data are freely accessible. Åtkomst till data via SND. Data är fritt tillgängliga. openAccess