Interdisciplinary Approaches for Sustainable Development Goals by Tymon Zielinski Iwona Sagan & Waldemar Surosz

Author:Tymon Zielinski, Iwona Sagan & Waldemar Surosz
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

2.2.6 Skagerrak

Although Skagerrak is not a part of the Baltic Sea it is an important strait, connecting the Baltic Sea with the North Sea., and requires a comment. Tørnes et al. (2002) conducted a study on arsenic and arsenic containing CWA in the area of Skagerrak, where shipwrecks with chemical munitions were sunk. Authors reported a background concentrations of arsenic, ranging from 42.8 to 49.3 µg g−1, however in four samples an elevated arsenic concentration was noted, reaching from 75 µg g−1 up to even 480 µg g−1 in the samples where arsenic-containing CWA (Clark I, triphenylarsine and bis(diphenylarsine)oxide) were also detected.

Summarizing, arsenic concentrations in the Gulf of Finland are considered to be rather low in comparison to other Baltic Sea areas. Elevated values are observed in deeper layers of the sediments, thus only a few species of benthic biota dwell deeper than 20 cm; therefore, arsenic should not be a threat to marine biota inhabiting this area (Vallius 2014, 2015). However, Yli-Hemminki et al. (2016) suggest that in the oscillating oxygen conditions in eutrophic Gulf of Finland, deposits of iron-manganese concretions forming a large storage of arsenic and phosphorus may be an inner source of arsenic returning to the biogeochemical cycle as the concretions may dissolve through microbial reactions in anoxic conditions. Results obtained in research on arsenic in Baltic Sea sediments and other matrices are given in Table 1.Table 1Arsenic concentrations in marine samples of different type and origin and analytical methods used in reference literature (Authors name in alphabetical order)

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.