Impact of sampling techniques on the concentration of ammonia and sulfide in pore water of marine sediments

Aleksandra Brodecka-Goluch , Patrycja Siudek , Jerzy Bolałek

Abstract

Three ex situ pore water sampling procedures (I – rhizon samplers, II – centrifugation of sediment subsamples collected from different sediment depths without core sectioning, III – core sectioning and centrifugation of sediment sections) were compared to indicate factors that may affect concentrations of pore water constituents (ammonia and sulfides). The methods were selected and modified in such a way as to determine how the concentrations are affected by different factors related to sampling procedures, e.g. contact with atmospheric air, filtration and sediment core disturbance. They were tested on nine sediment cores collected at one site in the southern Baltic Sea. The concentration of ammonia in pore water from centrifuged sediment sections was significantly higher compared to pore water extracted by rhizons – probably due to the impact of changing pH. The factor with the greatest impact on the H2S/HS–concentration in the analyzed pore water was the contact with atmospheric air and/or the extrusion of sediments from a core liner. Rhizons proved to be the best option for sampling pore waters analyzed for H2S/HS–and NH4+/NH3. In the case of H2S/HS–we noticed the smallest loss of the analyzed constituents. For ammonia, the centrifugation of the whole sediment sections was likely to cause interferences in the indophenol blue method.
Author Aleksandra Brodecka-Goluch (FOG / IO / DMChEP)
Aleksandra Brodecka-Goluch,,
- Division of Marine Chemistry and Environmental Protection
, Patrycja Siudek
Patrycja Siudek,,
-
, Jerzy Bolałek (FOG / IO / DMChEP)
Jerzy Bolałek,,
- Division of Marine Chemistry and Environmental Protection
Journal seriesOceanological and Hydrobiological Studies, ISSN 1730-413X, e-ISSN 1897-3191, (N/A 40 pkt)
Issue year2019
Vol48
No2
Pages184-195
Publication size in sheets0.55
ASJC Classification1910 Oceanography
DOIDOI:10.1515/ohs-2019-0017
URL https://doi.org/10.1515/ohs-2019-0017
Languageen angielski
Score (nominal)40
Score sourcejournalList
ScoreMinisterial score = 40.0, 22-03-2020, ArticleFromJournal
Publication indicators WoS Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2017 = 0.463; WoS Impact Factor: 2018 = 0.674 (2) - 2018=0.854 (5)
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