Article
Geosciences, Multidisciplinary
Rishabh P. Sharma, Jingxuan Deng, Peter K. Kang, Piotr Szymczak
Summary: This study investigates the effects of pore-scale mixing on macroscopic dissolution patterns and solute transport using a pore network model. The results show that mixing has the strongest impact on dissolution when the reactive and advective time scales are comparable. Mixing at pore intersections enhances flow focusing and leads to narrower wormholes and shorter breakthrough times.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Energy & Fuels
Ping Zhang, Yuan Liu, Nan Zhang, Amy T. Kan, Mason B. Tomson
Summary: This study evaluated the feasibility of using an attach-and-release strategy for controlling mineral scale deposition in aqueous fluid transporting pipelines. The research found that the inhibitor release behavior is significantly impacted by brine chemistry and flow rate. Efforts were also made to calculate the effluent inhibitor concentrations from pipe surfaces and predict inhibition effectiveness, promoting the potential application of this strategy in the field.
Article
Crystallography
Yan Yan, Tao Yu, Huan Zhang, Jiayu Song, Chengtun Qu, Jinling Li, Bo Yang
Summary: This study investigated the co-precipitation of calcium carbonate and calcium sulfate in scaling processes, comparing the results with single salt crystallization. It was found that in the co-deposition process, the form of calcium sulfate was gypsum, while calcium carbonate was stable in calcite form with some vaterite forms present. The presence of SO42- ions lowered the energy barrier of calcium carbonate, hindering its transformation to calcite, while an increase in HCO3- content inhibited the formation of calcium sulfate.
Article
Engineering, Geological
Chang Zhao, Yang Xiao, Jian Chu, Ran Hu, Hanlong Liu, Xiang He, Yi Liu, Xiang Jiang
Summary: Enzymatically induced carbonate precipitation (EICP) in heterogeneous subsurface was experimentally investigated using microfluidic cells with different pore networks. The impact of flow rate and pore-scale heterogeneity on the precipitation process and the morphology of calcium carbonate crystals was quantitatively evaluated. The analysis showed that low flow rates and strong heterogeneity in porous media favor the precipitation process due to more nucleation sites. Additionally, the complex pore structures generated by the precipitates limit the transport of reactants and result in permeability reduction. The study contributes significantly to the understanding of the advection-diffusion-reaction coupling effect and the role of pore network in the biomineralization process.
Article
Materials Science, Ceramics
Keitaro Yamaguchi, Shinobu Hashimoto
Summary: Conventional ceramic sintering cannot harden carbonates easily due to their thermal decomposition, but the cold sintering process (CSP) allows for lower temperature hardening. This study used vaterite phase calcium carbonate as the starting material and found that as the cold sintering temperature increased, the bulk density and compressive strength of the hardened calcium carbonate also increased, with the maximum compressive strength achieved at 80 degrees Celsius.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Water Resources
Jianping Xu, Matthew T. Balhoff
Summary: The discovery of novel regimes of calcium carbonate dissolution in micron-scale confined spaces through microfluidic experiments is reported. The study offers insights into various engineering and natural processes governed by small scale multiphase reactive flow physics.
ADVANCES IN WATER RESOURCES
(2022)
Article
Mechanics
Timan Lei, Kai H. Luo
Summary: The study reveals that dissolution reaction can delay the onset of fingering and affect fingering propagation and intensity, demonstrating the complex interplay between dissolution, diffusion, and viscosity contrast during miscible displacement in porous media. Increasing Peclet number and viscosity ratio destabilize fingering, while increasing Damkohler number can first suppress and then intensify fingering. The findings provide insights into displacement stability during geological CO2 sequestration, aiding in evaluating storage efficiency and safety.
Review
Materials Science, Multidisciplinary
Kunio Ishikawa, Koichiro Hayashi
Summary: This paper discusses the fabrication methods of carbonate apatite (CO(3)Ap) artificial bone, including dissolution-precipitation reaction and using a precursor. CO(3)Ap artificial bone has higher osteoconductivity, can be resorbed by osteoclasts, and is replaced by new bone through bone remodeling.
SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS
(2021)
Article
Materials Science, Ceramics
Ryo Kishida, Maab Elsheikh, Koichiro Hayashi, Akira Tsuchiya, Kunio Ishikawa
Summary: The study successfully fabricated interconnected porous CO3Ap blocks through a stepwise compositional transformation process. Removing water in gaps using filter paper was beneficial in preventing clogging and fabricating interconnected porous CSD blocks. Heat-treated CaCO3 blocks made from CSD block precursor showed higher mechanical strength.
CERAMICS INTERNATIONAL
(2021)
Article
Biochemical Research Methods
Jianping Xu, Matthew T. Balhoff
Summary: This research proposes a simple microfluidic approach, called Dissolution-After-Precipitation (DAP), to study carbonate rock dissolution and multiphase reactive transport. The proposed method successfully realizes all five classical single-phase carbonate rock dissolution regimes in a microfluidic chip. The results show that the heterogeneity of the porous medium significantly impacts the evolution of dissolution patterns over time. Furthermore, the study finds that the presence of a nonaqueous phase induces the formation of wormholes, which become pathways for nonaqueous phase transport. The transport of tetradecane in the wormhole is slow, while CO2 moves rapidly and seeks to enter a widening wormhole from a narrower one or the porous regions.
Article
Environmental Sciences
Saerom Park, Theresia May Anggraini, Jaeshik Chung, Peter K. Kang, Seunghak Lee
Summary: The study investigated precipitates formed by the mixing of iron sulfate solutions with simulated groundwater at the pore scale, using a microfluidic pore model. Different types of groundwater influenced the morphology and precipitation rates of the precipitates. The presence of FeOOH precipitates may act as an effective sorption barrier against some nutrients and heavy metals in the groundwater, but could also lead to pore clogging in the aquifer.
Article
Environmental Sciences
Mollie S. Sabo, Lauren E. Beckingham
Summary: The study investigates the evolution of permeability in reactive porous media where mineral dissolution and precipitation occur simultaneously. By simulating reactions in different spatial distributions, it is found that the location of dissolution and precipitation reactions affects the changes in porosity and permeability, which differ from the results obtained by macroscopic equations.
WATER RESOURCES RESEARCH
(2021)
Article
Geochemistry & Geophysics
Maude Julia, Christine V. Putnis, Helen E. King, Francois Renard
Summary: The interactions between calcium carbonate and cadmium-rich fluid were studied at the nano and microscale under fluid flow and static fluid conditions. The study examined three forms of CaCO3: calcite in single crystals of Iceland Spar, calcite in polycrystalline Carrara marble, and aragonite single crystals. The experiments revealed the nanoscale effect of cadmium on CaCO3 dissolution and growth, as well as the precipitation of a Cd-rich phase on the samples' surfaces. Hydrothermal experiments showed that the reactivity of single calcite crystals was passivated by the epitaxial growth of a less soluble Cd-rich endmember on the sample surface. On the other hand, the presence of grain boundaries or structural changes in Carrara marble and aragonite allowed the replacement of samples by a porous (Ca,Cd)CO3 solid-solution phase.
Article
Engineering, Chemical
Jean Lombard, Leane D. van Zijl, Luca Bertossi, Shane Smith, Elaine Barnard, Sean J. O'Kennedy, Anthony Turton
Summary: There is no mechanistic hypothesis as to why magnetic water treatment is effective in inhibiting limescale build-up in process-and municipal pipes. Two magnetic devices were developed and tested, but no effects of magnetic treatment on scale inhibition were observed.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Biotechnology & Applied Microbiology
Lyubov A. Ivanova, Vladimir V. Egorov, Yana A. Zabrodskaya, Aram A. Shaldzhyan, Alexander Ye. Baranchikov, Natalia V. Tsvigun, Anna N. Lykholay, Alexey D. Yapryntsev, Dmitry V. Lebedev, Anna A. Kulminskaya
Summary: In this study, the influence of medium components on CaCO3 precipitation and ECM composition induced by Bacillus cereus cells was analyzed. The accumulation of extracellular polysaccharides and amyloids was independent of calcium and urea, while the accumulation of eDNA and calcium carbonate precipitation required both ingredients. Removal of eDNA disrupted cell network formation and decreased the precipitate yield. The formation of CaCO3 minerals involved exopolysaccharides, negatively charged eDNA lattice, local Ca2+ supersaturation, and pH rise.
NPJ BIOFILMS AND MICROBIOMES
(2023)
Article
Geochemistry & Geophysics
Ange-Therese Akono, Charles Werth, Zhuofan Shi, Kristian Jessen, Theodore T. Tsotsis
Summary: The study investigated the influence of CO2-induced geochemical reactions on the cohesive-frictional properties of host rock, developed a multi-scale model, and found correlations between CO2-induced microstructural alterations and macroscopic properties.
Article
Chemistry, Physical
Kyung Tae Kim, Mantha Sai Pavan Jagannath, Gregory M. Su, Guillaume Freychet, Tongzhou Zeng, Kishore K. Mohanty, Graeme Henkelman, Lynn E. Katz, Charles J. Werth
Summary: The study evaluated the effects of a common anionic surfactant on mineral dissolution from shale into brine, showing that the surfactant can both enhance the formation of etch pits in calcite and impede their growth when added to the brine at concentrations above the critical micelle concentration. The results provide direct evidence of preferential adsorption of the surfactant at calcite pit edges versus flat calcite surfaces, indicating a complex interplay between surfactant adsorption behavior and mineral dissolution processes.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Ecology
Reinaldo E. Alcalde, Christopher M. Dundas, Yiran Dong, Robert A. Sanford, Benjamin Keith Keitz, Bruce W. Fouke, Charles J. Werth
Summary: Spatial concentration gradients of antibiotics can impact microbial survival and metabolic activity, with chemotaxis playing a crucial role in allowing bacteria to inhabit toxic regions. Efflux pumps, specifically RND pumps, were found to be important for microbial survival in batch conditions, but were not necessary for survival in antibiotic gradients in microfluidic studies. This research contributes to understanding how antibiotic spatial heterogeneity affects microbial response.
Article
Environmental Sciences
Somayeh G. Esfahani, Albert J. Valocchi, Charles J. Werth
Summary: The study suggests that low permeability zones can become major sources of groundwater contamination after remediation, and slow back diffusion from these zones can extend the management of polluted sites. Numerical models are commonly used to simulate back diffusion, estimate cleanup times, and develop site management strategies. The development of a new approach using MODFLOW/RT3D can potentially improve computational efficiency by modeling pollutant back diffusion without the need for fine discretization of the low permeability zones.
JOURNAL OF CONTAMINANT HYDROLOGY
(2021)
Article
Engineering, Environmental
Christian Engelmann, Kaveh Sookhak Lari, Luisa Schmidt, Charles J. Werth, Marc Walther
Summary: Laboratory experiments showed significant differences between the pool formation stage and the early DNAPL migration stage, possibly related to more complex processes. Overcoming current limitations in describing DNAPL source zone formation is necessary.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Geosciences, Multidisciplinary
Prabhas K. Yadav, Sandhya Birla, Vedaanti Baliga, Rudolf Liedl, B. R. Chahar, Charles J. Werth
Summary: Groundwater dependency is on the rise globally, with ongoing challenges in contamination from light nonaqueous phase liquids (LNAPLs). Mathematical approaches are preferred for initial site assessments, but the site-specific nature of contamination limits generalization. The development of CAST tool offers a user-friendly computing interface for site-specific data management and modeling.
Article
Environmental Sciences
Charles E. Schaefer, Paul Ho, Erin Berns, Charles Werth
Summary: Laboratory batch experiments demonstrated that various ferrous minerals can facilitate the reduction of TCE under anoxic conditions and generate hydroxyl radicals under oxic conditions. The iron content and reduction potential of the minerals may influence the first-order abiotic dechlorination rate constants of TCE.
JOURNAL OF CONTAMINANT HYDROLOGY
(2021)
Article
Environmental Sciences
Lang Zhou, Reinaldo E. Alcalde, Jinzi Deng, Baltazar Zuniga, Robert A. Sanford, Bruce W. Fouke, Charles J. Werth
Summary: This study found that Shewanella oneidensis is able to reduce nitrate through chemotactic migration, but only in regions with lower bactericidal concentrations. Migration is inhibited in regions with higher bactericidal concentrations of antibiotics.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Green & Sustainable Science & Technology
Samantha J. Fuchs, Dustin Crandall, Johnathan E. Moore, Mayandi Sivaguru, Bruce W. Fouke, D. Nicolas Espinoza, Ange-Therese Akono, Charles J. Werth
Summary: The study found that acidic brine has a greater impact on fracture displacement compared to reservoir-simulated brine. Acidic brine results in rougher fracture surfaces and lower fracture toughness. This suggests that acidic brine from geological carbon sequestration could dissolve sandstone cements and increase shear slip at fracture interfaces.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2021)
Article
Engineering, Environmental
Xueji You, Shuguang Liu, Erin C. Berns-Herrboldt, Chaomeng Dai, Charles J. Werth
Summary: This study investigates the role of reactive oxygen species, specifically center dot OH, in the oxidation of trichloroethene (TCE) in the presence of reduced iron minerals (RIM) and oxygen. Experimental results and kinetic modeling show that center dot OH production is dominated by free Fe(II) and that TCE competes with Fe(II) and organic matter for center dot OH. Further research is needed to confirm the identified reaction pathways and explore other potential mechanisms.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Matthew Frankel, Lynn E. Katz, Kerry Kinney, Charles J. Werth, Corwin Zigler, Lina Sela
Summary: Water utilities can use coupled hydraulic and chemical models to analyze changes in water quality conditions in water distribution systems. Uncertainties in model input parameters complicate model-based operational decisions and propagate through the model, resulting in uncertain model predictions. This study presents a framework for assessing hydraulic and chemical uncertainty in water quality models and demonstrates its application using monochloramine decay in water distribution systems. Results show that uncertainty in modeled monochloramine concentration increases with water age and reaction rates, and heavily depends on hydraulic variability.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Engineering, Environmental
Lang Zhou, Kyle Michelson, Glenn Fried, Robert A. Sanford, Mayandi Sivaguru, Ananda S. Bhattacharjee, Jinzi Deng, Bruce W. Fouke, Albert J. Valocchi, Charles J. Werth
Summary: Microbial sulfate reduction can cause various problems during oil recovery, and further research and assessment of predictive models are needed to minimize its impact.
ACS ES&T ENGINEERING
(2022)
Article
Environmental Sciences
Erin C. Berns-Herrboldt, Xueji You, Jilong Lin, Robert A. Sanford, Albert J. Valocchi, Timothy J. Strathmann, Charles E. Schaefer, Charles J. Werth
Summary: The presence of sulfate-reducing bacteria enhance the reactivity of iron sulfide minerals towards trichloroethene (TCE). Higher ratios of ferrous iron to sulfur result in significant increase in TCE transformation rates when Desulfovibrio vulgaris is present. The characterization of mineral precipitates indicates the presence of mackinawite (FeS), and experimental conditions are within the stability range of FeS. Filtered media without sulfate-reducing bacteria show similar high rates, suggesting the involvement of biogenic redox-active soluble microbial products in maintaining reducing conditions.
Article
Engineering, Environmental
Charles J. Werth, Chenxu Yan, Jacob P. Troutman
Summary: Nitrate is a widespread pollutant in groundwater and is currently removed at water treatment plants through ion exchange, which is effective but costly. (Electro)catalytic treatment, which reduces nitrate to dinitrogen gas or ammonium using a bimetal catalyst and atomic hydrogen, has emerged as a promising alternative. However, there are technical challenges limiting its widespread adoption, including precious metal amounts and cost, hydrogen efficiency and safety, and product selectivity.
ACS ES&T ENGINEERING
(2021)
Article
Engineering, Environmental
Chenxu Yan, Sruthi Kakuturu, Ashley Hesterberg Butzlaff, David M. Cwiertny, Syed Mubeen, Charles J. Werth
Summary: The PPTL flow reactor with potential control and custom-made cathode showed efficient nitrite removal with high current efficiency, but encountered issues such as ammonium production and significant current loss at more negative potentials. A reactive transport model was developed to simulate the kinetic data, indicating the reactor being more reaction limited than mass transfer limited. This parametrized model can be used to scale, operate, or modify the PPTL reactor for more efficient nitrite removal from larger flow streams.
ACS ES&T ENGINEERING
(2021)