Cation concentrations during benthic weathering of calcite and dunite in benthocosm experiments

DOI

Enhanced benthic weathering has been proposed to serve as a efficient negative emission strategy. The precise weatherig behaviour of calcite and dunite was investigated in leng-term experiments in benthocosms. These experiments were conducted between Sept. 2022 and Sept. 2023 ashore at the Kiel Fjord. The latter are large plastic containers (~0.8 m²) that are partly filled with sediments, with constant flow-through of Baltic Sea bottom water. The sediments, obtained from Boknis Eck in the Eckernförde Bay in March 2022, were amended with calcite and dunite in triplicate (22 mol/m² equivalent) . Three additional benthocosms were left unamended to serve as controls. The used materials were obtained from Sibelco (dunite) and from the german Lime Stone Association (calcite). Samples were obtained using benthic chambers (chamber volume of 400 ml) that were placed on the sediment for three hours. Samples were taken at the beginning (_in) and at the end of the deployment (_out). All samples were filtered through a 0.2 µm cellulose membrane filter and refrigerated in 25 ml ZinsserTM scintillation vials. Acidified sub-samples (30 μl suprapure HNO3- + 3 ml sample) were prepared for analyses of major and trace elements (Si, Na, K, Li, B, Mg, Ca, Sr, Mn, Ni and Fe) by inductively coupled plasma optical emission spectroscopy (ICP-OES, Varian 720-ES).

Identifier
DOI https://doi.pangaea.de/10.1594/PANGAEA.974041
Related Identifier IsPartOf https://doi.pangaea.de/10.1594/PANGAEA.974781
Related Identifier References https://doi.org/10.5194/sp-2-oae2023-6-2023
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.974041
Provenance
Creator Fuhr, Michael ORCID logo; Dale, Andy W; Wallmann, Klaus (ORCID: 0000-0002-1795-376X); Bährle, Rebecca; Kalapurakkal, Habeeb Thanveer; Sommer, Stefan; Spiegel, Timo ORCID logo; Buchholz, Björn; Schmidt, Mark ORCID logo; Perner, Mirjam ORCID logo; Geilert, Sonja ORCID logo
Publisher PANGAEA
Publication Year 2025
Funding Reference Federal Ministry of Education and Research https://doi.org/10.13039/501100002347 Crossref Funder ID 03F0895A https://foerderportal.bund.de/foekat/jsp/SucheAction.do?actionMode=view&fkz=03F0895A DAM CDRmare - RETAKE, GEOMAR
Rights Creative Commons Attribution 4.0 International; Data access is restricted (moratorium, sensitive data, license constraints); https://creativecommons.org/licenses/by/4.0/
OpenAccess false
Representation
Resource Type Dataset
Format text/tab-separated-values
Size 3888 data points
Discipline Earth System Research
Spatial Coverage (10.042W, 54.330S, 10.150E, 54.517N); Boknis Eck
Temporal Coverage Begin 2022-02-22T10:00:00Z
Temporal Coverage End 2023-09-06T00:00:00Z