Impact of sulfate on the release of genotoxic metals from hardened cement pastes

扫码查看

原文链接

NETL
NSTL

外文摘要：We investigated the effects of environmentally relevant sulfate concentrations on the leaching behavior of certainmetalloids in hardened cement pastes. In our study, different cement pastes made of Portland cement (CEM I),blast furnace slag cement (CEM Ⅲ/A) and a sulfate-resistant cement (CEM I SR0) were cured for 28 days andleached with ultrapure water and with sulfate-containing water. The released concentrations of the most metalsand metalloids were independent of the presence of environmentally relevant sulfate concentrations below 1 μg/L or even below the limit of quantification (LOQ). However, the contact to sulfate-containing water led to anincreased chromium release from CEM I, compared to leaching in ultrapure water. Under the same conditions anincreased release of vanadium was observed from CEM Ⅲ/A. A micronucleus test of the selected eluates revealedgenotoxic effects which can be very likely attributed to the presence of vanadate. We were further able to connectthe different leaching behavior of cement in sulfate-containing water compared to ultrapure water to changes ofthe specific surface area of the hardened cement pastes.

外文关键词：

Leaching hardened cement pasteExternal sulfate attackVanadiumChromiumGenotoxicity (micronucleus test)

作者：

Steffen Amann、Falk Wagemann、Sebastian Buchinger、Christian Dietrich、Arne Wick、Amir Rahimi、Frank Schmidt-Doehl、Thomas A. Ternes

展开 >

作者单位：

Federal Institute of Hydrology, Am Mainzer Tor 1, Koblenz 560687, Germany

Hamburg University of Technology, Institute for Materials, Physics and Chemistry of Buildings, Eissendorfer Str. 42, Hamburg 21073, Germany

Federal Waterways Engineering and Research Institute, Kussmaulstrasse 17, Karlsruhe 76187, Germany

Federal Institute of Hydrology, Am Mainzer Tor 1, Koblenz 560687, Germany||University of Koblenz, Universitaetsstrasse 1, Koblenz 56070, Germany

展开 >

出版年：

2025

DOI：

10.1016/j.jhazmat.2025.137990

Journal of hazardous materials

SCI

ISSN：0304-3894

年,卷(期)：2025.492(Jul.15)