% IMPORTANT: The following is UTF-8 encoded. This means that in the presence % of non-ASCII characters, it will not work with BibTeX 0.99 or older. % Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or % “biber”. @ARTICLE{Lange:877445, author = {Lange, Steve and Klinkenberg, Martina and Barthel, Juri and Bosbach, Dirk and Deissmann, Guido}, title = {{U}ptake and retention of molybdenum in cementitious systems}, journal = {Applied geochemistry}, volume = {119}, issn = {0883-2927}, address = {Amsterdam [u.a.]}, publisher = {Elsevier Science}, reportid = {FZJ-2020-02198}, pages = {104630}, year = {2020}, abstract = {The uptake of molybdenum, present in aqueous cementitious environments in the form of the molybdate ion (MoO42-), by various cement hydration phases such as calcium-silicate-hydrates (C–S–H), monosulphate (AFm), ettringite (AFt), as well as hardened cement paste made from Ordinary Portland cement (OPC), was studied in batch-type sorption experiments under anoxic conditions. Uptake kinetics were generally fast, leading to sorption equilibrium in less than 30 days. In particular, a strong uptake of molybdate by AFm phases was observed as well as a distinct contribution of C–S–H phases to the molybdate retention in cementitious systems, the latter depending on the Ca/Si-ratio of the C–S–H and the alkali content in solution. In systems containing hydrogarnet, the neo-formation of a molybdate-bearing AFm phase was identified as an additional process contributing to molybdate retention. The findings have implications for selecting grouts for the immobilisation of radioactive waste streams containing Mo-93 and also enhance the data available on molybdate sorption and retention in cementitious systems.}, cin = {IEK-6 / ER-C-2}, ddc = {550}, cid = {I:(DE-Juel1)IEK-6-20101013 / I:(DE-Juel1)ER-C-2-20170209}, pnm = {161 - Nuclear Waste Management (POF3-161) / 143 - Controlling Configuration-Based Phenomena (POF3-143)}, pid = {G:(DE-HGF)POF3-161 / G:(DE-HGF)POF3-143}, typ = {PUB:(DE-HGF)16}, UT = {WOS:000556136100008}, doi = {10.1016/j.apgeochem.2020.104630}, url = {https://juser.fz-juelich.de/record/877445}, }