Article
Environmental Sciences
Kai-Hung Lo, Che-Wei Lu, Chih-Ching Chien, Yi-Tern Sheu, Wei-Han Lin, Ssu-Ching Chen, Chih-Ming Kao
Summary: This study evaluated the effectiveness of an immobilized Clostridium butyricum (ICB) column scheme in cleaning up chlorinated-ethene polluted groundwater containing cis-1,2-dichloroethene (cis-DCE). The results showed that the introduction of ICB and SPRS significantly reduced the concentration of cis-DCE and enhanced the dechlorination process. Furthermore, the introduction of ICB and SPRS had a significant impact on the microbial communities.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Environmental Sciences
Jennifer Hellal, Catherine Joulian, Charlotte Urien, Stephanie Ferreira, Jeremie Denonfoux, Louis Hermon, Stephane Vuilleumier, Gwenael Imfeld
Summary: The study found that bacterial diversity and OHRB are mainly correlated with hydrogeochemical conditions, influencing the degradation of organochlorine compounds at multi-polluted sites. It emphasizes the benefits of combining multiple approaches to evaluate the dynamics of bacterial diversity and in situ degradation of CEs for a more robust assessment of natural attenuation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Alena Pavelkova, Vendula Cencerova, Josef Zeman, Vojtech Antos, Jaroslav Nosek
Summary: Electric field assisted remediation using nano iron has shown significant results and economic benefits during pilot applications. This method is based on donating electrons to zero-valent iron with strong reductive capacity. Experimental results demonstrated the generation of ethene and ethane near the anode due to the presence of dissolved Fe2+ ions.
Article
Engineering, Environmental
Shuyan Wu, Shichao Cai, Fengyang Qin, Feng He, Tianxi Liu, Xiuping Yan, Zhenyu Wang
Summary: Ball milling is effective in activating and reducing the size of microscale zero valent iron (mZVI) and sulfidating mZVI mechanochemically. However, there are differences in the interaction between chlorinated ethenes (CEs) and ball milled mZVI (mZVIbm) and mechanochemically sulfidated mZVI (S-mZVIbm) that are not well understood. This study found that simple ball milling exposed active Fe0 sites, while mechanochemical sulfidation decreased Fe0 sites and increased S2 sites. The sulfidation process enhanced the reactivity of TCE dechlorination the most, followed by PCE and 1,1-DCE, but reduced the reactivity of trans-DCE, cis-DCE, and VC compared to simple ball milling. Sulfidation also improved the electron efficiency of CE dechlorination, except for cis-DCE and VC. The kSA of cis-DCE, VC, and trans-DCE dechlorination positively correlated with the sulfide content.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Engineering, Environmental
Srivatsan Mohana Rangan, Shefali Rao, Aide Robles, Aatikah Mouti, Laurie LaPat-Polasko, Gregory Lowry, Rosa Krajmalnik-Brown, Anca G. Delgado
Summary: This study investigates the efficacy of coupling Fe0 with H2-utilizing organohalide-respiring bacteria (D. mccartyi) for the remediation of chlorinated solvents. By decoupling the application of Fe0 from organic substrates and D. mccartyi-containing cultures, the study demonstrates that reduced groundwater from Fe0 can support microbial reductive dechlorination and achieve high conversion rates of trichloroethene to ethene. The findings suggest that separating the application of Fe0 and biostimulation/bioaugmentation in space and time can enhance microbial trichloroethene reductive dechlorination, particularly in oxic conditions.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Ondrej Lhotsky, Jan Kukacka, Jan Slunsky, Kristyna Markova, Jan Nemecek, Vladislav Knytl, Tomas Cajthaml
Summary: A pilot-scale treatment of a low-permeability locality contaminated primarily by PCE with a complex microbial consortium capable of effective dechlorination processes was conducted via direct push pneumatic fracturing combined with the hydraulic delivery of a remediation suspension. Long-term monitoring revealed efficient abiotic reduction of PCE and trichloroethene, leading to a significant decrease in average chlorine number in the groundwater and an increase in ClE concentration due to accelerated mass-transfer caused by the treatment, which remained fully active for 2.5 years.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Milena Walaszek, Lise Cary, Gabriel Billon, Michaela Blessing, Aurelie Bouvet-Swialkowski, Melinda George, Justine Criquet, Jean Remi Mossmann
Summary: The study found that the sources of CHCs in the aquifer are complex and closely related to past and present industrial activities. Some areas are heavily impacted by pollution from former industrial laundries, while other areas are affected by multiple factories, causing concerns for water operators in the future.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Shichao Cai, Bo Chen, Xiaojiang Qiu, Jiamei Li, Paul G. Tratnyek, Feng He
Summary: Sulfidation of microscale ZVI using elemental sulfur as a reactant can achieve high efficiency in contaminant removal, with higher sulfidation efficiency compared to traditional sulfidation agents. The sulfidated mZVI has shown significantly enhanced reactivity and electron efficiency when reacting with trichloroethylene, making it a promising product for engineering applications.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Environmental
Miroslav Brumovsky, Vesna Micic, Jana Oborna, Jan Filip, Thilo Hofmann, Daniel Tunega
Summary: This study investigated the performance of iron nitride nanoparticles in dechlorination of chlorinated ethene compounds and found that they exhibited higher dechlorination rates compared to sulfidated nanoscale zero-valent iron particles.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Daniele Ghezzi, Maria Filippini, Martina Cappelletti, Andrea Firrincieli, Davide Zannoni, Alessandro Gargini, Stefano Fedi
Summary: The study conducted on highly contaminated chlorinated aliphatic organics in the subsoil of Ferrara, Italy revealed the importance of microbial degradation as a key mechanism for the dechlorination process. Through analysis of microbial communities using 16S rRNA gene sequencing and metabolic gene analysis, a complex network of metabolic interactions was hypothesized to support effective reductive dechlorination. This study provides insights into the diversity of microbial communities and potential dechlorinators in contaminated aquifer systems, shedding light on the microbial processes involved in bioremediation efforts.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Environmental
Edoardo Dell'Armi, Marco Zeppilli, Maria Letizia Di Franca, Bruna Matturro, Viktoria Feigl, Monika Molnar, Zsofia Berkl, Imre Nemeth, Hafsa Yaqoubi, Simona Rossetti, Marco Petrangeli Papini, Mauro Majone
Summary: In this study, a sequential reductive/oxidative bioelectrochemical process was used to remove chlorinated aliphatic hydrocarbons (CAHs) from contaminated groundwater. The sequential system consisted of two membrane-less microbial electrolysis cells (MECs) connected in series. The results showed that the sequential process effectively mineralized CAHs and reduced their ecotoxicity, as evaluated by biomarkers and ecotoxicity tests.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Engineering, Environmental
Shuting Xiong, Jinxin Zhao, Bingliang Lun, Fengmin Chen, Yanyan Gong, Fan Wu, Jinhua Wu, Li-Zhi Huang, Weizhao Yin, Dionysios D. Dionysiou
Summary: This study achieved efficient dechlorination of trichloroethene and its removal from real groundwater with a novel composite, providing evidence to reconsider ferrous hydroxide as an inexpensive and efficient reductant for soil and groundwater contaminated with chlorinated ethenes (CEs).
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Hejie Qin, Tanjie Zha, Kun Qian, Yuankui Sun, Xiaohong Guan, Chuncheng Chen
Summary: By embedding enzyme-like Co-N4 sites in a nitrogen-doped carbon support, we developed a Co-NC catalyst that combines the advantages of abiotic and biological dechlorination strategies. Co-NC exhibited excellent reactivity and stability for catalytic dechlorination of chlorinated ethenes. It could transform up to 94.8% of trichloroethene directly to acetylene without toxic intermediates and utilize electrons from dissolved Fe(II), making it a sustainable remediation strategy.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Review
Engineering, Environmental
Kaixiong Yang, Yi-Jie Kong, Li-Zhi Huang, Xin-Ming Hu
Summary: This review systematically summarizes the recent development in catalytic degradation of chlorinated organic pollutants (COPs) using various single-atom catalysts (SACs). It focuses on understanding the structure-performance relationships and key mechanisms involved, evaluating the dechlorination and oxidation processes of COPs, and discussing the synergic reduction-oxidation degradation process. The review also proposes possible solutions to existing challenges, aiming to inspire and guide the future applications of SACs in COPs elimination.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Abhilash Venkateshaiah, Daniele Silvestri, Stanistaw Waclawek, Rohith K. Ramakrishnan, Kamil Krawczyk, Padmanapan Saravanan, Miroslawa Pawlyta, Vinod V. T. Padil, Miroslav Cernik, Dionysios D. Dionysiou
Summary: The synthesis of bimetallic nZVI with palladium and nickel significantly improved the degradation efficiency of chlorinated volatile organic compounds, demonstrating complete degradation of contaminants within a 24-hour timeframe. The bimetallic nZVIs showed superior performance compared to pristine nanoparticles, especially nZVI/Pd and nZVI/Ni.
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Azeem Farinmade, Olakunle Francis Ojo, James Trout, Jibao He, Vijay John, Diane A. Blake, Yuri M. Lvov, Donghui Zhang, Duy Nguyen, Arijit Bose
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Chemistry, Physical
Lei Yu, Azeem Farinmade, Oluwole Ajumobi, Yang Su, Vijay T. John, Julia A. Valla
APPLIED CATALYSIS A-GENERAL
(2020)
Article
Chemistry, Physical
Marzhana Omarova, Yueheng Zhang, Igor Kevin Mkam Tsengam, Jibao He, Tianyi Yu, Donghui Zhang, Vijay John
Summary: The amphiphilic polypeptoids called HCPs can insert alkyl hydrophobes into phospholipid bilayers, disrupting liposomes and forming colloidally stable HCP-lipid complexes. Addition of these complexes to fresh liposomes leads to fusion and formation of multilayered vesicles. The morphology of the liposome system can be changed by controlling the amount of HCP-lipid complex added.
JOURNAL OF PHYSICAL CHEMISTRY B
(2021)
Article
Chemistry, Multidisciplinary
Niti R. Agrawal, Marzhana Omarova, Faraz Burni, Vijay T. John, Srinivasa R. Raghavan
Summary: The study demonstrates the formation of nanoscale vesicles and vesicle gels in glycerol, formamide, and ethylene glycol using lecithin. Vesicles in polar solvents are easier to form and more stable than those in water, attributed to refractive index-matching between lipid bilayers and solvents. The ability to use lipids in polar solvents could have wide-ranging applications, such as in cosmetics, pharmaceuticals, and lubricants.
Article
Chemistry, Multidisciplinary
Louis G. Corcoran, Brian A. Saldana Almaraz, Kamilah Y. Amen, Geoffrey D. Bothun, Srinivasa R. Raghavan, Vijay T. John, Alon McCormick, R. Lee Penn
Summary: The study found that LT dispersant blends containing L and T can induce broad Winsor III microemulsion regions in DOW phase diagrams, correlating with thermodynamic phase behavior. The research provides a protocol allowing observation of phase behavior on short time scales and a set of guidelines to interpret the results.
Article
Nanoscience & Nanotechnology
Oluwole Ajumobi, Yang Su, Azeem Farinmade, Lei Yu, Jibao He, Julia A. Valla, Vijay T. John
Summary: This study demonstrates the integration of ceramic nanostraws into ordered mesoporous silica MCM-41 to mitigate diffusional restrictions in porous catalysts. The method shows a 50% increase in effectiveness factor, offering implications for catalysis and separation technologies. The easy and scalable synthesis technique complements traditional catalyst preparation methods.
ACS APPLIED NANO MATERIALS
(2021)
Article
Energy & Fuels
Lei Yu, Azeem Farinmade, Oluwole Ajumobi, Vijay T. John, Julia A. Valla
Summary: The study proposed a method to produce gasoline and diesel grade biofuels from biomass in a single step using a Ni-ZSM-5/Ni-MCM-41 composite. The composite enhanced alkane and methane production without sacrificing yields to monoaromatic hydrocarbons. This unique composite enables the completion of two-step tandem reactions in one step, leading to a self-sustainable and intensified process.
Article
Engineering, Chemical
Azeem Farinmade, Oluwole Ajumobi, Lei Yu, Yang Su, Yueheng Zhang, Yueyun Lou, Julia A. Valla, Vijay T. John
Summary: The use of clay nanotubes has been effective in improving the CO2 capture efficiency of high surface area mesoporous materials.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Physical
Igor Kevin Mkam Tsengam, Marzhana Omarova, Elizabeth G. Kelley, Alon McCormick, Geoffrey D. Bothun, Srinivasa R. Raghavan, Vijay T. John
Summary: This paper investigates the nanostructures formed by the combination of the phospholipid lecithin and the nonionic surfactant Tween 80. The study reveals the formation of disc-like bicelles and cylindrical micelles at specific L/T ratios. The findings suggest that lecithin lipids make up the body of the discs, while Tween 80 surfactants occupy the rims. The research provides insights into the morphological changes in the lecithin-Tween 80 system.
JOURNAL OF PHYSICAL CHEMISTRY B
(2022)
Article
Chemistry, Physical
Olasehinde Owoseni, Yang Su, Srinivasa Raghavan, Arijit Bose, Vijay T. John
Summary: The integration of cationic and hydrophobic functionalities into hydrophobically modified chitosan (HMC) biopolymer facilitates complementary emulsion stabilization with negatively charged halloysite clay nanotubes (HNT). The adsorption of the cationic HMC onto the negatively charged HNT modifies the surface wettability of the nanotubes, facilitating the attachment of the nanotubes to the oil-water interface. Hydrophobic interaction, insertion of HMC hydrophobes into the oil phase, and electrostatic interactions between HMC and HNT are proposed as key mechanisms driving the increased emulsion stability.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Biochemistry & Molecular Biology
Tianyi Yu, Marzhana Omarova, Meng Zhang, Istiak Hossain, Jianqiang Chen, Omead Darvish, Vijay T. John, Donghui Zhang
Summary: The cellular functions of membrane proteins are closely related to their structures and aggregation states. We have investigated the fragmentation of synthetic liposomes using hydrophobe-containing polypeptoids (HCPs). Our findings demonstrate that HCPs can effectively induce the fragmentation of liposomes into colloidally stable nanoscale HCP-lipid complexes, and have the potential for novel macromolecular surfactants for membrane protein extraction.
Article
Energy & Fuels
Oluwole Ajumobi, Borui Wang, Azeem Farinmade, Jibao He, Julia A. Valla, Vijay T. John
Summary: Polymeric amine encapsulation in MCM-41 particles for CO2 capture has the drawback of leaching out the water-soluble polymer. Covalent grafting of amine functional groups from an alkoxysilane on MCM-41 provides better stability but faces diffusional restriction. Incorporating halloysite nanotubes into MCM-41 creates hierarchical porosity and enhances molecular transport, resulting in improved CO2 adsorption capacity.
Article
Chemistry, Physical
Samuel E. Solomon, Pierce Doubleday, Jared Landry, Vijay T. John, Noshir S. Pesika
Summary: Carbon microspheres can reduce friction and surface wear at low speeds and high loads. The size of the carbon microspheres and the lubrication gap determine the dominant lubrication mechanism in dilute colloidal lubricating systems.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Polymer Science
Bailee N. N. Barrett, Chi-Huan Tung, Guan-Rong Huang, Istiak Hossain, Chang-Woo Do, Vijay T. T. John, Wei-Ren Chen, Donghui Zhang
Summary: The intramicellar mass heterogeneity of sequence-defined ionic peptoid block copolymers carrying a single charged monomer was studied using contrast variation small-angle neutron scattering analysis. The position of the ionic monomer was found to significantly impact the internal micellar structure. By positioning the ionic monomer closer to the hydrophilic/hydrophobic block junction, the micelles become less compact and show increased chain folding and invasive water. This study demonstrates the potential of using ionic monomer position as a design parameter to control the internal structures of nanoscale micellar assemblies.
Article
Oceanography
Antonietta Quigg, John W. Farrington, Sherryl Gilbert, Steven A. Murawski, Vijay T. John
Summary: Dispersants are used as a method of oil spill response to reduce exposure for organisms, protect shorelines, and safeguard responders. A decade of research has led to a deeper understanding of dispersant effectiveness and impacts, highlighting the need for further studies on subsea dispersant application and long-term effects.
