Article
Environmental Sciences
Hongling Bu, Qinkai Lei, Hui Tong, Chengshuai Liu, Shujie Hu, Wenpo Xu, Yujie Wang, Manjia Chen, Jiangtao Qiao
Summary: Abiotic reduction of iron (oxyhydr)oxides by aqueous Fe(II) is an important process in the Fe cycle in soil. This study investigates the phase transformation of Lep-HA coprecipitates induced by Fe(II) and its implications for immobilizing heavy metals, particularly Cd(II). The presence of co-precipitated HA reduces the solid phase transformation of Fe, and newly formed magnetite immobilizes Cd(II) through surface complexes, incorporation, or structural substitution.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
P. Dhakal, M. S. Coyne, D. H. McNear, O. O. Wendroth, M. M. Vandiviere, E. M. D'Angelo, C. J. Matocha
Summary: Chemodenitrification, the abiotic reduction of nitrite by iron (II), is an important process in nitrogen cycling due to its source of nitrous oxide production. This study investigated the reactivity of nitrite with goethite and Fe(II)-treated goethite under anoxic conditions. The results showed that nitrite removal by goethite was faster at pH 5.5 and involved a combination of sorption and reduction processes when high aqueous Fe(II) was present. The formation of a surface complex resembling protonated nitrite was observed with implications for nitrogen cycling and release of atmospheric pollutants.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Multidisciplinary
Yu-Tzu Yeh, Chun-Wei Huang, An-Yuan Hou, Chih-Yang Huang, Yi-Dong Lin, Wen-Wei Wu
Summary: This study successfully revealed the formation process of high-entropy oxides (HEOs) and determined the ion arrangements and valence-state-changing mechanisms. High-resolution transmission electron microscopy, electron energy loss spectroscopy, and extended X-ray absorption fine structure techniques were used. The results provide valuable insights for improving the manufacturing process of HEOs.
Article
Chemistry, Multidisciplinary
Max L. Bols, Julien Devos, Hannah M. Rhoda, Dieter Plessers, Edward Solomon, Robert A. Schoonheydt, Bert F. Sels, Michiel Dusselier
Summary: This study presents a method for preparing highly active alpha-Fe(II) sites by introducing Fe(III) during hydrothermal synthesis and treating appropriately. The effect of iron on zeolite crystallization was investigated, and intermediate iron species were tracked using various spectroscopy techniques.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Geochemistry & Geophysics
Edward J. O'Loughlin, Maxim Boyanov, Christopher A. Gorski, Michelle M. Scherer, Kenneth M. Kemner
Summary: The bioreduction of Fe(III) oxides by dissimilatory iron-reducing bacteria leads to the formation of various Fe(II)-bearing secondary minerals, which are influenced by the mineralogy of Fe(III) oxides, phosphate concentration, and the availability of electron shuttles. The overall extent of Fe(II) production and the types of secondary minerals formed are highly dependent on these factors, demonstrating a complex interplay of mineralogical, geochemical, and microbiological factors.
Article
Geochemistry & Geophysics
Xiaofeng Lin, Yang Lu, Zhenqing Shi
Summary: A quantitative model was developed to study the release of Cu(II) from Fe oxides or Fe oxide-humic substance composites. The results showed that Cu(II) release rates decreased with Fe oxide aging processes, while the presence of humic substances increased Cu(II) mobility.
APPLIED GEOCHEMISTRY
(2022)
Article
Environmental Sciences
Zhe Zhou, Drew E. Latta, Michelle M. Scherer
Summary: The study showed that the presence of natural organic matter (NOM) inhibits the Fe(II)-catalyzed transformation of ferrihydrite (Fh). Nickel associated with SRNOM-Fh was found to be more susceptible to acid extraction compared to Fh in the presence of Fe(II). Transformation to secondary minerals may be necessary for nickel stabilization to occur.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Multidisciplinary
Manon Cot-Auriol, Matthieu Virot, Thomas Dumas, Olivier Diat, Denis Menut, Philippe Moisy, Sergey I. I. Nikitenko
Summary: New insights about the formation mechanism of PuO2 nanoparticles are provided, with the discovery of a Pu(iv) oxo-hydroxo hexanuclear cluster as an important intermediate during their formation, indicating that their formation is controlled by H-transfer reactions.
CHEMICAL COMMUNICATIONS
(2022)
Article
Environmental Sciences
Xiaoming Zhao, Zidan Yuan, Shaofeng Wang, Guoqing Zhang, Shan Qu, Yidi Wang, Sijia Liu, Yuanming Pan, Jinru Lin, Yongfeng Jia
Summary: The ubiquitous co-existence of arsenic and cadmium presents a major challenge to the environment. This study found that the co-existence of arsenic and cadmium significantly delays the transformation rates of ferrihydrite, and alters the composition of transformation products. Additionally, the co-existent arsenic modifies the distribution of cadmium, reducing its mobility.
Article
Engineering, Environmental
Yanbo Zeng, Yuanxin Li, Xiuxiu Jia, Guangzhi Hu, Huilin Bi, Xiaopeng Zhang, Bin Du, Fengqin Chang
Summary: This study introduces a new and effective strategy for phosphorus removal using a PAN-based cerium hydroxide nanocomposite. The nanocomposite shows high adsorption capacity for phosphate and can be easily separated from the liquid. The combination of electrospinning and spark ablation techniques allows for the stable immobilization of cerium dioxide nanoparticles on the fiber membrane.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Nanoscience & Nanotechnology
Alexander Walnsch, Mario J. Kriegel, Mykhaylo Motylenko, Grzegorz Korpala, Ulrich Prahl, Andreas Leineweber
Summary: Fe-Mn-Al-Ni based shape memory alloys are preferred for large scale applications due to their low materials costs and good cold workability. The alloys consist of an A2 structured matrix with B2 precipitates, necessary for thermoelasticity. Thermodynamic considerations show that the undercooling of about 1000 K is caused by the resistance of the B2 precipitates to undergo transformation to the L1(0) structure enforced by the martensitic transformation of the matrix.
SCRIPTA MATERIALIA
(2021)
Review
Green & Sustainable Science & Technology
Yongbao Chu, Qingfeng Ma, Xuan Hou, Yunxin Zhang, Jingyi Zhang, Xiaoyu Ni, Yan Wang
Summary: It is important to develop novel electrocatalytic membranes for efficiently remove micropollutants from water and wastewater. In this study, two CeO2 samples were synthesized to modify the carbon nanotube-based membrane. The CeO2-N sample exhibited higher proportion of Oad and Olat, resulting in smaller equivalent polarization resistance and lower potential differences. Consequently, the CeO2-N@CNT-based membrane demonstrated superior performance in diclofenac removal compared to the CeO2-O@CNT-based membrane. Due to its lower apparent activation energy and higher single electron transfer rate, the CeO2-N@CNT-based membrane generated a greater amount of 1O2, while the CeO2-O@CNT-based membrane generated more & sdot;OH.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Engineering, Environmental
Anna Yu. Romanchuk, Tatiana V. Plakhova, Anastasiia D. Konyukhova, Anastasiia Smirnova, Daniil A. Kozlov, Daniil A. Novichkov, Alexander L. Trigub, Stepan N. Kalmykov
Summary: The sorption behavior of Ce(III) on three common environmental minerals (goethite, anatase, and birnessite) was studied. Batch sorption experiments using a radioactive 139Ce tracer were conducted to examine the key characteristics of the sorption process. Different sorption kinetics and changes in oxidation states were observed for the sorption of Ce(III) on birnessite compared to the other minerals.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Erdan Hu, Meichen Liu, Feng Wang, Bosheng Lv, Jun Wu
Summary: The effects of phosphate, silicate, humic acid, and calcium on the release of As(V) co-precipitated with Fe(III) and Fe(II) during aging were investigated. Silicate and humic acid caused notable release of As(V) while phosphate and calcium promoted As(V) removal efficiency. These results are important for the treatment of As(V) contaminated groundwater.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Environmental
Yuankun Liu, Daniel Pergament Persson, Jinxing Li, Yongchao Liang, Tingqiang Li
Summary: CeO2NPs can decrease the concentration of cadmium in the roots and shoots of Sedum alfredii by up to 37%, mainly through the apoplastic pathway. Additionally, CeO2NPs can accelerate the development of Casparian strips and suberin, affecting the uptake and translocation of both Ce and Cd in the roots.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Geochemistry & Geophysics
Andrew N. Thomas, Elisabeth Eiche, Jorg Goettlicher, Ralph Steininger, Liane G. Benning, Helen M. Freeman, Dominique J. Tobler, Marco Mangayayam, Knud Dideriksen, Thomas Neumann
GEOCHEMICAL TRANSACTIONS
(2020)
Article
Chemistry, Multidisciplinary
Anne R. Nielsen, Stanislav Jelavic, Daniel Murray, Behzad Rad, Martin P. Andersson, Marcel Ceccato, Andrew C. Mitchell, Susan L. S. Stipp, Ronald N. Zuckermann, Karina K. Sand
CRYSTAL GROWTH & DESIGN
(2020)
Article
Environmental Sciences
Virginia Alonso-de-Linaje, Dominique J. Tobler, Ruben Espinosa, Vicente Rives, Nicolas Bovet, Kim N. Dalby
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2020)
Article
Engineering, Chemical
Denise Felix da Silva, Danai Tziouri, Lilia Ahrne, Nicolas Bovet, Flemming Hofmann Larsen, Richard Ipsen, Anni Bygvra Hougaard
JOURNAL OF FOOD ENGINEERING
(2020)
Article
Nanoscience & Nanotechnology
D. Okhrimenko, C. F. Nielsen, L. Z. Lakshtanov, K. N. Dalby, D. B. Johansson, M. Solvang, J. Deubener, S. L. S. Stipp
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Chemistry, Multidisciplinary
M. P. Andersson, T. Hassenkam, J. Matthiesen, L. Nikolajsen, D. Okhrimenko, S. Dobberschuetz, S. L. S. Stipp
Article
Chemistry, Physical
D. Okhrimenko, L. Z. Lakshtanov, M. H. M. Olsson, M. Ceccato, K. N. Dalby, J. D. Rodriguez-Blanco, M. P. Andersson, S. L. S. Stipp
Summary: Understanding the adsorption behavior of nitrogen heterocyclic compounds (NHCs) on soil minerals is essential for designing more efficient wastewater treatment and soil/groundwater remediation systems. This study found that kaolinite in sandstone significantly contributes to the adsorption of quinoline, a representative NHC, with adsorption peaking at pH around 6 and decreasing with increasing ionic strength. The results confirm the effectiveness of sandstones and clays in removing NHCs from waste and groundwaters.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Green & Sustainable Science & Technology
Weijia Yu, Marten int Veld, Rossana Bossi, Mohamed Ateia, Dominique Tobler, Anders Feilberg, Nicolas Bovet, Matthew S. Johnson
Summary: The study reveals that the photocatalytic degradation of dimethyl sulfide can generate various byproducts, with formaldehyde being one of the main byproducts. Additionally, as the temperature increases, the production of byproducts also increases significantly.
Article
Materials Science, Ceramics
M. Turchi, S. Perera, S. Ramsheh, A. J. Popel, D. Okhrimenko, S. L. S. Stipp, M. Solvang, M. P. Andersson, T. R. Walsh
Summary: Characterization of complex aluminosilicate glass particles and fibers, such as stone wool, and their interfaces with water and ions, is crucial for understanding dissolution phenomena. Molecular simulations can provide detailed atomic structures of these interfaces, complementing experimental efforts. Evaluation of candidate potentials for recovering experimental structural data of calcium aluminosilicate glass relevant to stone wool fibers shows promising results for modeling dissolution of these materials.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Environmental Sciences
Markus Reischer, Anders G. Christensen, Klaus Weber, Dominique J. Tobler, Knud Dideriksen
Summary: Injection of microparticulate and nanoparticulate zero valent iron has become a common method for groundwater remediation. Predicting ZVI transport in the subsurface is complex due to inhomogeneities, making tools for determining its distribution after injection highly valuable. A new direct-push technique combining fluorescent and visible imaging has been developed to detect sulfidized nanoparticulate zero valent iron (S-nZVI) in the subsurface, showing promising results in laboratory experiments and small scale tests.
JOURNAL OF CONTAMINANT HYDROLOGY
(2021)
Article
Chemistry, Multidisciplinary
Knud Dideriksen, Laura Voigt, Marco C. Mangayayam, Simon H. J. Eiby, Case M. van Genuchten, Cathrine Frandsen, Kirsten M. O. Jensen, S. L. S. Stipp, Dominique J. Tobler
Summary: Layered double hydroxides (LDHs) are commonly used for various purposes, and understanding their structure is important for their applications. In this study, the structure of synthetic Fe(II)-Fe(III)/Al(III) LDH was investigated using pair distribution function (PDF) analysis. The results showed that the structural coherence decreased with increasing Al content, and the structure of Fe(II)-Al(III) LDH could best be matched with a pattern for a single metal hydroxide sheet.
ACS EARTH AND SPACE CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Isaac Appelquist Loge, Benaiah U. Anabaraonye, Nicolas Bovet, Philip Loldrup Fosbol
Summary: Crystallization fouling poses challenges in heat exchangers, subsurface energy production, and membrane technology; the dominance of growth or nucleation in the precipitation process remains unclear due to lack of experimental evidence; the deposition behavior of BaSO4 changes from growth-dominated to nucleation-dominated regimes with increasing supersaturation, affecting surface resilience and detachment. Sticking factors for BaSO4, CaCO3, and CaSO4 are 1.15%, 0.80%, and 0.11%, respectively, based on published data.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Chemistry, Physical
Xiaoyi Jiang, Elhamalsadat Shekarforoush, Musemma Kedir Muhammed, Nico Bovet, Marcel Ceccato, Kathryn A. Whitehead, Nils Arneborg, Jens Risbo
Summary: The surface of Lactobacillus crispatus DSM 20584 and Lactobacillus rhamnosus GG were chemically modified using hexanoic anhydride and octanal, resulting in decreased hydrophilicity and altered aggregation and adhesion behaviors. Principal Component Analysis revealed reduced differences in surface properties after modification. This chemical modification method can be applied to adjust the surface properties of lactic acid bacteria and potentially other microorganisms, influencing bacterial adhesion and biofilm formation.
SURFACES AND INTERFACES
(2023)
Article
Polymer Science
D. Okhrimenko, A. Budi, M. Ceccato, D. B. Johansson, D. Lybye, K. Bechgaard, S. L. S. Stipp
Summary: The study investigated the stability of phenol-urea-formaldehyde (PUF) binder and 3-aminopropylsilane (APS) on composite silicate materials under different humidity and temperature conditions. Results showed that deposited APS is more sensitive to high temperature and humidity, while PUF is less affected by these factors. Applying a hydrophobization agent to APS/PUF treated surfaces can increase material stability.
POLYMER DEGRADATION AND STABILITY
(2021)