Citation:

PANGAEA.961683

Name: Water quality and geochemical data from Laihianjoki and Sulvanjoki flocculation experiments in April 2021
Published: 2023-11-09
License: https://creativecommons.org/licenses/by/4.0/
Keywords: acid sulphate soils; Baltic Sea; estuaries; Flocculation; Laboratory experiment; Salinity; trace metals

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Published: 2023-11-09 • DOI registered: 2023-12-08

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Abstract:

Water samples were collected from the Laihianjoki and Sulvanjoki rivers in April 2021, using a bucket and transferred to 30 L acid-washed containers. The sampling was conducted during springtime, a few weeks after the peak flow caused by snow smelt. The collected river waters were immediately analyzed for pH, temperature, electrical conductivity, and salinity using a WTW Multiline P4 meter. The samples were then transported to the Tvärminne field station of the University of Helsinki, where laboratory experiments began within 24 hours.

A large-volume bucket experiment was conducted to study the dynamics of suspended particle size distribution and associated nutrients during the transition from fresh to brackish water conditions. Artificial seawater with salinity of 66.8 g kg-1 was added to river water in an acid-washed basin, while changes in water chemistry and particle size distribution were continuously monitored using a multiparameter water quality sonde and a laser-diffraction particle size analyzer. Additionally, small-volume jar experiments were performed to collect particle samples under controlled conditions using a flocculator apparatus. The collected material was analyzed, and the filtrate was used for further analysis of colored dissolved organic matter.

Triplicate samples from flocculator experiments were acidified and analyzed for metal concentrations using an inductively coupled plasma optical emission spectrometer (ICP-OES) and an inductively coupled plasma mass spectrometer (ICP-MS). Filtrate samples were measured for colored dissolved organic matter (CDOM) absorbance and fluorescence using a spectrophotometer and a spectrofluorometer, respectively. Particulate organic carbon (POC) and particulate organic-bound metals were analyzed in filter retentate samples using a mass spectrometer and ICP-MS. Total suspended matter (TSM) was determined by filtering and weighing samples. The apparent particle density was calculated by dividing TSM by volumetric concentrations measured by a laser-diffraction particle size analyzer. However, the density results are biased as particles larger than the detection limit of the instrument are not included in the analysis.

Keyword(s):

acid sulphate soils; Baltic Sea; estuaries; Flocculation; Laboratory experiment; Salinity; trace metals

Coverage:

Median Latitude: 63.038500 * Median Longitude: 21.682500 * South-bound Latitude: 63.034000 * West-bound Longitude: 21.660000 * North-bound Latitude: 63.043000 * East-bound Longitude: 21.705000

Date/Time Start: 2021-04-13T00:00:00 * Date/Time End: 2021-04-13T00:00:00

Event(s):

Laihianjoki_water * Latitude: 63.043000 * Longitude: 21.705000 * Date/Time: 2021-04-13T00:00:00 * Location: Finland * Method/Device: Water sample (WS)

Sulvanjoki_water * Latitude: 63.034000 * Longitude: 21.660000 * Date/Time: 2021-04-13T00:00:00 * Location: Finland * Method/Device: Water sample (WS)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Type of study	Study type		Asmala, Eero
2	Event label	Event		Asmala, Eero
3	LATITUDE	Latitude		Asmala, Eero		Geocode
4	LONGITUDE	Longitude		Asmala, Eero		Geocode
5	Date/time analysis, experiment	Date/time analysis exp		Asmala, Eero
6	Salinity, absolute	ASAL	g/kg	Asmala, Eero	Multiparameter probe, YSI Xylem Inc., EXO2
7	Conductivity, specific	Cond	µS/cm	Asmala, Eero	Multiparameter probe, YSI Xylem Inc., EXO2
8	Replicate	Repl		Asmala, Eero
9	Carbon, organic, particulate	POC	mg/l	Asmala, Eero	Mass spectrometer, Europa Scientific ANCA-MS 20-20 15N/13C
10	Suspended particulate matter	SPM	mg/l	Asmala, Eero	Derived from filter weights
11	Aluminium, particulate	Al part	µg/l	Asmala, Eero	Inductively coupled plasma–optical emission spectrometer (ICP-OES), Thermo Fisher Scientific Inc., iCAP 7400
12	Cobalt, particulate	Co part	µg/l	Asmala, Eero	Inductively coupled plasma mass spectrometer (ICP-MS), Thermo Fisher Scientific Inc., iCAP Q
13	Copper, particulate	Cu part	µg/l	Asmala, Eero	Inductively coupled plasma mass spectrometer (ICP-MS), Thermo Fisher Scientific Inc., iCAP Q
14	Iron, particulate	Fe part	µg/l	Asmala, Eero	Inductively coupled plasma–optical emission spectrometer (ICP-OES), Thermo Fisher Scientific Inc., iCAP 7400
15	Manganese, particulate	Mn part	µg/l	Asmala, Eero	Inductively coupled plasma mass spectrometer (ICP-MS), Thermo Fisher Scientific Inc., iCAP Q

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

432 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 Study type	2 Event	3 Latitude	4 Longitude	5 Date/time analysis exp	6 ASAL [g/kg]	7 Cond [µS/cm]	8 Repl	9 POC [mg/l]	10 SPM [mg/l]	11 Al part [µg/l]	12 Co part [µg/l]	13 Cu part [µg/l]	14 Fe part [µg/l]	15 Mn part [µg/l]
Laboratory experiment	Laihianjoki_water	63.043	21.705	2021-04-15	0.0	248	A	5100	20.8	746	0.102	5.25	604	2.630
Laboratory experiment	Laihianjoki_water	63.043	21.705	2021-04-15	0.0	248	B	5318	24.4	780	0.072	13.43	570	3.510
Laboratory experiment	Laihianjoki_water	63.043	21.705	2021-04-15	0.0	248	C	4879	26.6	724	0.026	6.17	580	2.250
Laboratory experiment	Laihianjoki_water	63.043	21.705	2021-04-15	0.8	1715	A	6072	34.6	1256	0.000	6.87	692	2.130
Laboratory experiment	Laihianjoki_water	63.043	21.705	2021-04-15	0.8	1715	B	6076	31.6	1294	0.000	17.29	730	2.410
Laboratory experiment	Laihianjoki_water	63.043	21.705	2021-04-15	0.8	1715	C	6683	39.8	1686	0.000	10.01	958	2.610
Laboratory experiment	Laihianjoki_water	63.043	21.705	2021-04-15	1.6	3110	A	8372	35.2	1668	0.000	7.69	698	2.190
Laboratory experiment	Laihianjoki_water	63.043	21.705	2021-04-15	1.6	3110	B	7808	33.6	1778	0.000	6.43	744	1.990
Laboratory experiment	Laihianjoki_water	63.043	21.705	2021-04-15	1.6	3110	C	7729	32.6	1784	0.000	8.37	752	2.510
Laboratory experiment	Laihianjoki_water	63.043	21.705	2021-04-15	3.5	6640	A	6850	41.0	2052	0.000	8.41	736	2.490
Laboratory experiment	Laihianjoki_water	63.043	21.705	2021-04-15	3.5	6640	B	7074	42.0	2112	0.158	10.29	754	2.570
Laboratory experiment	Laihianjoki_water	63.043	21.705	2021-04-15	3.5	6640	C	7524	43.0	2012	0.100	6.79	692	2.310
Laboratory experiment	Laihianjoki_water	63.043	21.705	2021-04-15	4.2	7750	A	7086	47.6	2292	0.192	8.47	858	3.010
Laboratory experiment	Laihianjoki_water	63.043	21.705	2021-04-15	4.2	7750	B	7283	45.4	2112	0.114	9.39	792	2.510
Laboratory experiment	Laihianjoki_water	63.043	21.705	2021-04-15	4.2	7750	C	8186	50.4	2292	0.152	8.45	858	3.050
Laboratory experiment	Laihianjoki_water	63.043	21.705	2021-04-15	4.8	8920	A	7035	45.8	2232	0.164	9.45	854	3.170
Laboratory experiment	Laihianjoki_water	63.043	21.705	2021-04-15	4.8	8920	B	7089	52.8	2192	0.128	15.49	830	3.370
Laboratory experiment	Laihianjoki_water	63.043	21.705	2021-04-15	4.8	8920	C	7002	49.0	2172	0.082	8.03	804	3.110
Laboratory experiment	Sulvanjoki_water	63.034	21.660	2021-04-15	0.1	370	A	3470	11.2	332	0.000	5.61	288	0.937
Laboratory experiment	Sulvanjoki_water	63.034	21.660	2021-04-15	0.1	370	B	3624	17.4	612	0.000	5.43	340	1.090
Laboratory experiment	Sulvanjoki_water	63.034	21.660	2021-04-15	0.1	370	C	3990	10.8	790	0.000	32.09	286	0.777
Laboratory experiment	Sulvanjoki_water	63.034	21.660	2021-04-15	1.1	2240	A	5820	18.4	1372	0.132	6.01	460	2.210
Laboratory experiment	Sulvanjoki_water	63.034	21.660	2021-04-15	1.1	2240	B	5204	20.4	1134	0.106	4.65	456	0.955
Laboratory experiment	Sulvanjoki_water	63.034	21.660	2021-04-15	1.1	2240	C	4468	16.8	1356	0.120	11.49	472	1.370
Laboratory experiment	Sulvanjoki_water	63.034	21.660	2021-04-15	2.1	4110	A	7413	38.6	2332	0.134	7.55	540	1.330
Laboratory experiment	Sulvanjoki_water	63.034	21.660	2021-04-15	2.1	4110	B	7272	32.4	2432	0.098	5.97	574	1.570
Laboratory experiment	Sulvanjoki_water	63.034	21.660	2021-04-15	2.1	4110	C	5879	28.2	2412	0.164	19.69	566	3.730
Laboratory experiment	Sulvanjoki_water	63.034	21.660	2021-04-15	3.1	5860	A	7101	34.4	3312	0.084	7.55	580	1.190
Laboratory experiment	Sulvanjoki_water	63.034	21.660	2021-04-15	3.1	5860	B	7689	36.6	3172	0.074	7.99	562	1.190
Laboratory experiment	Sulvanjoki_water	63.034	21.660	2021-04-15	3.1	5860	C	7451	31.8	3212	0.082	10.55	570	1.330
Laboratory experiment	Sulvanjoki_water	63.034	21.660	2021-04-15	4.1	7630	A	8599	49.2	3572	0.052	9.31	588	1.450
Laboratory experiment	Sulvanjoki_water	63.034	21.660	2021-04-15	4.1	7630	B	8422	46.0	3912	0.094	9.35	582	1.930
Laboratory experiment	Sulvanjoki_water	63.034	21.660	2021-04-15	4.1	7630	C	8949	40.4	3852	0.086	13.35	596	8.790
Laboratory experiment	Sulvanjoki_water	63.034	21.660	2021-04-15	5.0	9250	A	8163	45.0	4052	0.114	12.31	600	1.870
Laboratory experiment	Sulvanjoki_water	63.034	21.660	2021-04-15	5.0	9250	B	7701	41.8	4092	0.112	15.49	596	2.030
Laboratory experiment	Sulvanjoki_water	63.034	21.660	2021-04-15	5.0	9250	C	7771	46.4	4092	0.114	8.89	616	1.630