000125117 001__ 125117
000125117 005__ 20190316234307.0
000125117 0247_ $$2doi$$a10.1029/2007WR006301
000125117 02470 $$2DAR$$a13480
000125117 02470 $$2ISI$$a000258826200001
000125117 037__ $$aARTICLE
000125117 245__ $$aModeling U(VI) biomineralization in single- and dual- porosity porous media
000125117 269__ $$a2008
000125117 260__ $$c2008
000125117 336__ $$aJournal Articles
000125117 520__ $$aUranium extraction, processing and storage have resulted in a legacy of uranium-contaminated groundwater aquifers worldwide. An emerging remediation technology for such sites is the in situ immobilization of uranium via biostimulation of dissimilatory metal reducing bacteria (DMRB). While this approach has been successfully demonstrated in experimental studies, advances in understanding and optimization of the technique are needed. The motivation of this work was to understand better how dual-porosity (DP) porous media may affect immobilization efficiency via interactions with the dominant geochemical and microbial processes. A biogeochemical reactive transport model was developed for uranium immobilization by DMRB in both single and DP porous media. The impact that microbial residence location has on the success of biostimulated U(VI) immobilization in DP porous media was explored under various porosity and mass transfer conditions. Simulations suggest that DP media are likely to show delayed U(VI) immobilization relative to single porosity systems. U(VI) immobilization is predicted to be less when microbial activity is restricted to diffusion- dominant regions but not when restricted to advective- dominant regions. The results further highlight the importance of characterizing the bioresidency status of field sites if biogeochemical models are to predict accurately remediation schemes in physically heterogeneous media.
000125117 6531_ $$aRemediation
000125117 6531_ $$aUranium
000125117 6531_ $$aReactive transport
000125117 6531_ $$aSubsurface
000125117 6531_ $$aModel
000125117 6531_ $$aDissimilatory metal-reducing bacteria
000125117 700__ $$aRotter, B. E.
000125117 700__ $$0240314$$g169209$$aBarry, D. A.
000125117 700__ $$aGerhard, J. I.
000125117 700__ $$aSmall, J. S.
000125117 773__ $$j44$$tWater Resources Research$$k8$$qW08437
000125117 8564_ $$uhttp://www.agu.org/journals/wr/$$zURL
000125117 8564_ $$uhttps://infoscience.epfl.ch/record/125117/files/2007WR006301.pdf$$zn/a$$s578792
000125117 8564_ $$uhttps://infoscience.epfl.ch/record/125117/files/jp153accpted.pdf$$zn/a$$s1502470
000125117 909C0 $$xU11221$$0252101$$pECOL
000125117 909CO $$qGLOBAL_SET$$particle$$ooai:infoscience.tind.io:125117$$pENAC
000125117 937__ $$aECOL-ARTICLE-2008-097
000125117 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000125117 980__ $$aARTICLE