Article
Engineering, Environmental
In-Gyu Song, Yu-Gyeong Kang, Jae-Hwan Kim, Hakwon Yoon, Woo Yong Um, Yoon- Seok Chang
Summary: Unprecedented high concentrations of heavy metals have been detected in the groundwater at a zinc smelter in Seokpo, South Korea. The use of sulfidated nanoscale zerovalent iron (S-nZVI) has proved to be effective in removing contaminants and reducing microbial toxicity in the groundwater.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Jurate Kumpiene, Ivan Carabante, Alfreda Kasiuliene, Annabelle Austruy, Michel Mench
Summary: This study investigated the long-term efficiency of soil remediation using zerovalent iron to stabilize arsenic contaminated soil. The results showed that even after 15 years, substantial amounts of ferrihydrite and lepidocrocite were still present in the soils, contributing to arsenic immobilization. Both sequential extraction and EXAFS techniques were effective in highlighting arsenic immobilization by poorly crystalline iron phases.
ENVIRONMENTAL POLLUTION
(2021)
Article
Engineering, Environmental
Payel Singh, Prabir Pal, Priyanka Mondal, Govindachetty Saravanan, Penumaka Nagababu, Swachchha Majumdar, Nitin Labhsetwar, Subhamoy Bhowmick
Summary: Sulphur modified nano zerovalent iron (S?nZVI) has shown high efficiency in removing inorganic arsenic from water, especially under acidic conditions. The addition of FeS on the surface of nZVI can significantly alter the sequestration mechanism of arsenic, leading to enhanced removal efficiency in contaminated water.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Xiaoqin Zhang, Yueli Chen, Jia Tang, Aiping Zhang
Summary: In this study, an Fe-0/PMS advanced oxidation system-based permeable reactive barrier (Fe-0/PMS-PRB) was used to remove refractory organic matter from landfill leachate-contaminated groundwater. The Fe-0/PMS system showed higher removal efficiency of organic matter compared to other control systems. The main active oxygen species, SO4·- and HO·, effectively degraded various refractory organic substances.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
Zhou Yin, Giovanni Cagnetta, Jun Huang
Summary: The technology of permeable reactive barriers is a reliable and cost-effective method to prevent the spread of pollutants in groundwaters. In this study, sulfidated zero-valent iron synthesized by ball-milling is proposed as a barrier filling material to activate persulfate for the removal of reduction-resistant organic pollutants. The experiments demonstrated the rapid degradation of atrazine, a model pollutant, and the superior efficiency of sulfidated iron compared to zero-valent iron. The study also found that coexisting ions have a negative influence on both atrazine and its byproducts.
Article
Geosciences, Multidisciplinary
Michael Lawrinenko, Sudarshan Kurwadkar, Richard T. Wilkin
Summary: Permeable reactive barriers (PRBs) are widely used for groundwater remediation at contaminated sites, but there is still a lack of understanding regarding their performance and the mechanisms involved. The role of ZVI corrosion in the remediation of pollutants and the interaction between contaminants and ZVI in PRBs are not well understood. This review paper aims to clarify these mechanisms and highlight the importance of ZVI corrosion products and mineral precipitates in the long-term performance of PRBs. Further development of characterization tools and models is necessary for effective PRB design.
GEOSCIENCE FRONTIERS
(2023)
Article
Environmental Sciences
Chunzi Ma, Jiangpeng Li, Wei Xia, Ying Ding, Liting Zhang, Yunfeng Xu
Summary: Chelating agents can enhance the removal efficiency of As and Cr, while reducing agents mainly affect the removal efficiency of As.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Yongji Huang, Qiang Zeng, Liang Hu, Hui Zhong, Zhiguo He
Summary: This study investigates the feasibility of removing Cr(VI) from synthetic groundwater using a bio-permeable reactive barrier constructed from a novel iron-based material and specific microorganisms. The results show that the introduction of proper microorganisms enhances the utilization of iron and increases the reactive sites for Cr(VI) removal. However, excessive biomass leads to pore clogging and reduces the removal performance.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Luis E. E. Lan, Fernando D. Reina, Graciela E. De Seta, Jorge M. Meichtry, Marta I. Litter
Summary: This study evaluated three low-cost technologies for arsenic removal in water: zerovalent iron, coagulation-flocculation, and clay adsorption. The results showed that zerovalent iron was most effective in removing As(V), while coagulation-flocculation and clay adsorption were not efficient for removing As(III).
Article
Engineering, Environmental
S. Maldonado, R. Lopez-Vizcaino, M. A. Rodrigo, P. Canizares, V Navarro, G. Roa, C. Barrera, C. Saez
Summary: The study shows that the PRB-EKSF process mainly relies on electrokinetic transport and dehalogenation for treating contaminated soil, while the adsorption on GAC is not as crucial as expected. In the pilot scale, a significant amount of clopyralid remained in the soil after treatment, and the transport of volatile compounds into the atmosphere was promoted.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Fengyi Zhu, Xuefei Tan, Weixin Zhao, Likui Feng, Shufei He, Liangliang Wei, Lin Yang, Kun Wang, Qingliang Zhao
Summary: The study demonstrated that using zero valent iron-based composites as fillers for permeable reactive barriers can effectively remove metal ions such as Cu(II), Co(II), Cr(VI) and As(III), showing potential application value. The composites exhibited different selectivity values in different metal systems, and also showed dynamic removal improvement for multiple metals.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Environmental
Yongji Huang, Qiang Zeng, Liang Hu, Daoling Xiong, Hui Zhong, Zhiguo He
Summary: The study found that biologically assisted reactive barriers showed good performance in removing Cr(VI), with bio-activated carbon and bio-zero valent iron helping to improve the removal efficiency of Cr(VI). The biofilm induced Cr(VI) removal performances were enhanced with increasing influent Cr(VI) concentrations.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Physical
Alvaro G. P. Galvao, Leticia G. A. Costa, Emily C. T. de A. Costa, Djalma R. da Silva, Carlos A. Martinez-Huitle, Elisama Vieira dos Santos
Summary: This study proposes an eco-efficient treatment technology for removing phenanthrene from soil. By incorporating electrokinetic remediation system and using modified granulated cork and iron-modified particles, the phenanthrene in the soil can be effectively removed.
Article
Engineering, Geological
Stefania Bilardi, Silvia Simonetti, Paolo Salvatore Calabro, Nicola Moraci
Summary: This study aims to evaluate the efficiency of a multilayer configuration of a permeable reactive barrier (PRB) made up of zero valent iron (ZVI) and lapillus. The results showed that the addition of a pre-treatment layer can increase the longevity of the PRB and improve the removal efficiency of contaminants.
SOILS AND FOUNDATIONS
(2023)
Article
Multidisciplinary Sciences
Huichen Yang, Rui Hu, Hans Ruppert, Chicgoua Noubactep
Summary: Iron corrosion in Fe-0-based permeable reactive barriers can lead to significant porosity loss and system failure. A mathematical model was presented in this study to describe the porosity change and the impact of in-situ generated FeCPs. The model results suggest that previous models have underestimated the effects of FeCPs on porosity loss in PRBs.
SCIENTIFIC REPORTS
(2021)
Article
Geochemistry & Geophysics
Richard T. Wilkin, Tony R. Lee, Douglas G. Beak, Robert Anderson, Betsy Burns
APPLIED GEOCHEMISTRY
(2018)
Article
Engineering, Environmental
Richard T. Wilkin, Tony R. Lee, Molly R. Sexton, Steven D. Acree, Robert W. Puls, David W. Blowes, Christopher Kalinowski, Jennifer M. Tilton, Leilani L. Woods
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2019)
Review
Geochemistry & Geophysics
Andreas Kubier, Richard T. Wilkin, Thomas Pichler
APPLIED GEOCHEMISTRY
(2019)
Article
Engineering, Environmental
Richard T. Wilkin, Robert G. Ford, Lisa M. Costantino, Randall R. Ross, Douglas G. Beak, Kirk G. Scheckel
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2019)
Article
Engineering, Environmental
Dovie M. Stanley, Richard T. Wilkin
JOURNAL OF HAZARDOUS MATERIALS
(2019)
Letter
Engineering, Environmental
Richard T. Wilkin, Robert G. Ford, Lisa M. Costantino, Randall R. Ross, Douglas G. Beak, Kirk G. Scheckel, Peng Ho
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2020)
Article
Engineering, Environmental
Richard T. Wilkin, Tony R. Lee, Ralph D. Ludwig, Claire Wadler, William Brandon, Brian Mueller, Eva Davis, Darryl Luce, Tracy Edwards
Summary: Rare-earth elements (REEs) serve as sensitive tracers for evaluating groundwater interaction with materials for contaminant remediation, with zero-valent iron and organic carbon mixtures effectively reducing contaminant concentrations. The solid-phase partitioning of REEs increases with pH in ZVI systems, while unexpected negative europium anomalies were observed in organic carbon PRBs, providing new insights into redox conditions in treatment zones. REE concentrations and shale-normalized profiles are valuable natural tracers for understanding in situ technologies for groundwater remediation.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Review
Environmental Sciences
Sudarshan Kurwadkar, Jason Dane, Sushil R. Kanel, Mallikarjuna N. Nadagouda, Ryan W. Cawdrey, Balram Ambade, Garrett C. Struckhoff, Richard Wilkin
Summary: Per- and polyfluoroalkyl substances (PFAS), as anthropogenic organic pollutants, are widely distributed in the aquatic environment and have adverse effects on human health and ecology. This review critically evaluates the global occurrence and distribution of PFAS in water and discusses the evolving regulatory responses to mitigate the risks associated with PFAS. The study highlights the need for international cooperation in managing PFAS contamination.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Geosciences, Multidisciplinary
Michael Lawrinenko, Sudarshan Kurwadkar, Richard T. Wilkin
Summary: Permeable reactive barriers (PRBs) are widely used for groundwater remediation at contaminated sites, but there is still a lack of understanding regarding their performance and the mechanisms involved. The role of ZVI corrosion in the remediation of pollutants and the interaction between contaminants and ZVI in PRBs are not well understood. This review paper aims to clarify these mechanisms and highlight the importance of ZVI corrosion products and mineral precipitates in the long-term performance of PRBs. Further development of characterization tools and models is necessary for effective PRB design.
GEOSCIENCE FRONTIERS
(2023)
Article
Multidisciplinary Sciences
Mary Ellen Tuccillo, Julie Blue, Jonathan Koplos, Jack Kelly, Richard T. Wilkin
Summary: Globally, lead (Pb) contamination is a significant issue affecting public health. This study examines the concentrations and isotopic data of Pb in a Pb paint production facility and its surrounding areas. The findings suggest that pollution from the facility has impacted offsite soils, but determining the exact sources of lead contamination is challenging due to overlapping isotopic signatures. An integrated approach that considers site characterization and historical activities is important for determining source attribution.
Editorial Material
Geosciences, Multidisciplinary
Michael Lawrinenko, Sudarshan Kurwadkar, Richard T. Wilkin
GEOSCIENCE FRONTIERS
(2023)
Article
Water Resources
Matt Rovero, Diana Cutt, Rachel Griffiths, Urszula Filipowicz, Katherine Mishkin, Brad White, Sandra Goodrow, Richard T. Wilkin
Summary: The review of literature on reported sorption coefficients of eight anionic PFAS in soil revealed significant associations between soil cation content (calcium and sodium) and PFAS sorption, while organic carbon content was significant only at elevated levels. Discrepancies between laboratory and field studies suggest that critical aspects of PFAS sorption may be overlooked in laboratory experiments. Future studies would benefit from standardized analytical methods and appropriate soil parameters for more accurate predictions.
GROUND WATER MONITORING AND REMEDIATION
(2021)
Article
Soil Science
Steven Chapman, Beth Parker, Tom Al, Richard Wilkin, Diana Cutt, Katherine Mishkin, Shane Nelson
Summary: The study investigates the attenuation of a hexavalent chromium plume in sedimentary bedrock through a combination of conventional and high resolution methods. The decline in concentration is attributed to diffusion and reaction processes, highlighting the importance of understanding these mechanisms in remediation efforts.
Article
Soil Science
Chunming Su, Richard T. Wilkin
Article
Engineering, Environmental
Christopher J. Ruybal, Richard T. Wilkin, Kristie D. Rue, John E. McCray, Dominic C. DiGiulio
ENVIRONMENTAL ENGINEERING SCIENCE
(2018)