Elovaara, Samu; Zhao, Lingbin; Asmala, Eero; Kaartokallio, Hermanni; Thomas, David N: Gypsum flocculation experiment in river Paimionjoki, Finland, 2022 [dataset bundled publication]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.967477 (dataset in review)
Abstract:
A laboratory experiment was conducted to investigate gypsum induced flocculation of dissolved organic matter in a boreal river Paimionjoki in south-western Finland in April, May, June and August 2022. The purpose was to investigate particulate matter formation caused by gypsum induced-flocculation and changes in the characteristics and bioavailability of the dissolved organic matter pool. The experiment included water sampling and measurements close to the estuary (doi:10.1594/PANGAEA.967417 and doi:10.1594/PANGAEA.967427), a flocculation experiment in the laboratory (doi:10.1594/PANGAEA.967423), an ultrafiltration of the water generated during the flocculation experiment (doi:10.1594/PANGAEA.967424) and a bioassay incubation using the water generated during the flocculation experiment (doi:10.1594/PANGAEA.967426). The flocculation experiment was conducted as a jar experiment using Velp Scientifica FC6S flocculator (1 h at 60 RPM). Two treatments were used in the experiment, a gypsum treatment where calcium sulfate (14.8 mmol/l, final concentration 1.48 mmol/l) was added to the samples and a control treatment where ultrapure water was added instead. Water sample collection and sensor measurements were conducted immediately below water surface. All experiments were conducted in 10 C.
Supplement to:
Elovaara, Samu; Zhao, Lingbin; Asmala, Eero; Kaartokallio, Hermanni; Thomas, David N (in prep.): Changes in riverine dissolved organic matter caused by gypsum-induced flocculation.
Coverage:
Latitude: 60.421722 * Longitude: 22.654389
Date/Time Start: 2026-04-26T00:00:00 * Date/Time End: 2026-08-09T00:00:00
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Size:
5 datasets
Download Data (login required; moratorium until 2026-04-23)
Datasets listed in this bundled publication
- Elovaara, S; Zhao, L; Asmala, E et al. (in review): Sensor data collected during the sampling in river Paimionjoki. https://doi.pangaea.de/10.1594/PANGAEA.967417
- Elovaara, S; Zhao, L; Asmala, E et al. (in review): Laboratory measurements after the experimental flocculation. https://doi.pangaea.de/10.1594/PANGAEA.967423
- Elovaara, S; Zhao, L; Asmala, E et al. (in review): Selected colored dissolved organic matter propertie of the experimental flocculation. https://doi.pangaea.de/10.1594/PANGAEA.967424
- Elovaara, S; Zhao, L; Asmala, E et al. (in review): Conducted measurements during the bioassay incubation initiated after the flocculation experiment. https://doi.pangaea.de/10.1594/PANGAEA.967426
- Elovaara, S; Zhao, L; Asmala, E et al. (in review): In-situ particle size distribution measured during each sampling. https://doi.pangaea.de/10.1594/PANGAEA.967427