Article
Environmental Sciences
Klaus Rohler, Alexander Arthur Haluska, Bernd Susset, Binlong Liu, Peter Grathwohl
Summary: Research on PFAS leaching behavior in contaminated agricultural sites in Germany reveals differences between standardized column percolation tests and long-term field leaching, indicating that complete removal of PFAS compounds will likely take years to decades.
JOURNAL OF CONTAMINANT HYDROLOGY
(2021)
Article
Environmental Sciences
Tayssir Kadri, Thomas Robert, Tarek Rouissi, Joseph Sebastian, Sara Magdouli, Satinder Kaur Brar, Richard Martel, Jean-Marc Lauzon
Summary: This study investigated the biodegradation of soil contaminated with high concentrations of diesel using a crude enzymatic cocktail produced by Alcanivorax borkumensis. The results showed that the enzyme cocktail significantly enhanced the degradation of C-10-C-50, while batch tests indicated the important impact of biosurfactants on desorption and biotransformation.
ENVIRONMENTAL POLLUTION
(2021)
Article
Engineering, Chemical
P. J. van Staden, J. Petersen
Summary: A procedure for extrapolating laboratory column leaching kinetics for commercial heap leaching design is proposed, utilizing models based on dual-porosity hydrology and chemical reactions during diffusion. Case studies on acid-soluble copper, sulphide-copper, and gold ores were analyzed to develop theoretical relationships for the impact of bulk density and dripper spacing on diffusional path length. The study suggests that compaction of ore particles results in increased tortuosity of diffusion pathways, and the method identifies the maximum dripper spacing that can be used before the impact of bulk density exceeds the impact of dripper spacing on diffusional path length.
MINERALS ENGINEERING
(2021)
Article
Environmental Sciences
Ruiyuan Zhang, Bojun Huang, Hongyuan Zeng, Xin Wang, Bo Peng, Huiling Yu, Wenfeng Guo
Summary: Reductive dissolution of iron oxides in flooded paddy soils is the main cause of arsenic release into soil water solution. This study demonstrates the effectiveness of using a porous column pre-loaded with ferrihydrite for the rapid removal of soluble arsenic from flooded soils, improving seriously arsenic-contaminated paddy fields for safe food production.
Article
Environmental Sciences
Guan-Nian Chen, Shi-Yuan Yao, Yan Wang, Yu-Chao Li, Han Ke, Yun-Min Chen
Summary: An innovative cycled column test with supporting batch equilibrium and kinetic analysis was developed for evaluating the adsorption behavior of soils. Non-equilibrium adsorption was observed in the tests, similar to traditional methods. The isotherm of local equilibrium was conducted based on the relatively short-duration testing results with simple analysis. The concentration curves of influent and effluent were simulated using a modified dual-porosity model.
Article
Environmental Sciences
Leroy Gonez-Rodriguez, Alexander Johs, Kenneth A. Lowe, Kimberly E. Carter, Frank E. Loffler, Melanie A. Mayes
Summary: Mercury (Hg) as a global environmental pollutant poses a significant risk to human health by threatening water resources. Sorbents like Thiol-SAMMS showed the highest removal rate of Hg in comparison to other sorbents, but none were able to completely remove all introduced Hg. Overall, sorbents demonstrated substantial effectiveness in removing Hg, indicating potential for deployment in contaminated environments, but further optimization is needed to increase efficiency.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Energy & Fuels
Barbara K. Klik, Dorota Kulikowska, Zygmunt M. Gusiatin
Summary: The suitability of sewage-sludge derived washing agents for removing Cd from highly contaminated soils was assessed. The results showed that DOM was the most suitable washing agent for remediating highly contaminated soils, as it had high efficiency in Cd removal and maintained stability in flow velocity during flushing.
Article
Environmental Sciences
Karen Ane Skjennum, Helen K. French, Pasquale Carotenuto, Gudny Okkenhaug
Summary: Environmental assessments are necessary before remediating and redeveloping contaminated sites. Current guidelines are commonly based on total concentrations, with occasional inclusion of leaching procedures. However, analysis of hydraulic conductivity is rarely considered. Cost-effective methods that reflect both contaminant leaching and hydrogeological properties are needed for proper soil management.
Article
Environmental Sciences
Klaus Roehler, Bernd Susset, Peter Grathwohl
Summary: Contamination of soils with PFAS can lead to groundwater pollution, and understanding the extent and time scales of contamination is crucial for site management. This study found that persistent PFAAs and precursors cooccur in contaminated agricultural soils. Rapid leaching of C4-C8 PFCA was observed, while leaching slowed with increasing chain-length. The results suggest that the emission of C4-C8 PFCAs from the contaminated soils may last for several decades, as indicated by production rates and precursor reservoir estimations.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Paula V. Remor, Julia Isidro, Sonia A. Figueiredo, Vitor J. P. Vilar, Cristina Saez, Manuel A. Rodrigo
Summary: This study aims to evaluate the effectiveness of the integrated approach combining surfactant-assisted soil washing and cork granules for removing lindane from contaminated soil. The results show that cork granules can efficiently retain lindane and that soil washing with surfactants can separate lindane from soil. However, the integration of both treatments is not as efficient as expected and hinders the sorption of lindane.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
Edwin Barth, John McKernan, Diana Bless, Kavitha Dasu
Summary: A two-phased bench-scale study evaluated the potential use of various sorbents for chemical stabilizing agents in the solidification/stabilization treatment process of PFAS contaminated soils. Results indicated that GAC showed the highest sorption performance for PFAS compounds, significantly reducing leachability, suggesting its effectiveness in immobilization of PFAS contaminants in soil.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Environmental Sciences
Raid Alrowais, Muhammad Tariq Bashir, Muhammad Ali Sikandar, Md. Munir Hayet Khan, Bandar Alwushayh, Ahmed Ghazy, Md. Alhaz Uddin, Javed Iqbal
Summary: This study explored the synthesis of a composite material (NMO-BC) for removing manganese and iron pollutants from water. The researchers used various analysis methods to identify the unique characteristics of the composite material and investigated the kinetics and mechanisms of adsorption. The results showed that NMO-BC has a high adsorption capacity for manganese and iron. This study contributes to the understanding and potential application of NMO-BC in water pollution monitoring and treatment.
Article
Engineering, Environmental
Shervin Kabiri, William Tucker, Divina A. Navarro, Jennifer Braunig, Kristie Thompson, Emma R. Knight, Thi Minh Hong Nguyen, Charles Grimison, Craig M. Barnes, Christopher P. Higgins, Jochen F. Mueller, Rai S. Kookana, Michael J. McLaughlin
Summary: This study evaluated the leaching and desorption of PFAS from contaminated soils using three different leaching tests, and found that PFAS chemical structure and pH of soil play a significant role in PFAS leaching. Additionally, no single soil property adequately described PFAS leaching behavior, highlighting the complexity of this environmental issue.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Pengjie Hu, Yu Zhang, Jiajia Wang, Yanpei Du, Zimeng Wang, Qinghai Guo, Zezhen Pan, Xingmao Ma, Britta Planer-Friedrich, Yongming Luo, Longhua Wu
Summary: The formation of colloid- and nanoparticle-bound As is an important geochemical process that can affect the mobility and bioavailability of arsenic (As) in paddy environments. This study focused on the distribution and composition of particle-bound As in paddy soils under changing redox conditions. The results showed that organic matter-stabilized colloidal Fe, most likely in the form of (oxy)hydroxide-clay composite, is the main carrier of As. Soil reduction released As from the colloidal fractions, while reoxidation caused their rapid sedimentation.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Review
Agronomy
Irina Gabriela Cara, Denis Topa, Ioan Puiu, Gerard Jitareanu
Summary: Soil pesticide contamination caused by modern agriculture is a significant global issue. Biochar, as a renewable and economical carbonaceous material, provides a natural solution for immobilizing pesticides and improving soil health. However, its impact in agricultural contaminated soil is influenced by various factors, which require further research on mechanisms and controlling factors.
Article
Environmental Sciences
Masayuki Someya, Kazuo Higashino, Yukari Imoto, Hirofumi Sakanakura, Tetsuo Yasutaka
Summary: Soil batch leaching tests worldwide aim to quantify the leaching of hazardous substances from contaminated soil. Recent studies show that soil colloidal particles with small diameters may still persist in the filtrate even after filtration through a 0.45-μm membrane filter, potentially affecting the concentration of arsenic or lead. The study evaluated the effects of 0.45- or 0.4-μm MF materials on filtrate turbidity and leaching concentrations of inorganic hazardous elements, finding that the MF material significantly influences the removal rate of colloidal arsenic or lead and thus impacts the results of leaching tests.
Article
Environmental Sciences
Seungki Back, Hirofumi Sakanakura
Summary: This study aims to establish an inventory of combustible wastes in order to identify specific sources of potentially toxic elements (PTEs) in recyclable materials. By classifying and analyzing the combustible wastes, specific sources of PTEs contributing to the toxicity of municipal solid waste (MSW) and incineration residues were presented, thus aiding in the reduction of their toxicity levels.
JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT
(2021)
Article
Engineering, Environmental
Akihide Kamata, Masato Ueshima, Hirofumi Sakanakura, Toshihiko Miura, Masahiko Katoh
Summary: This study evaluated the re-release of arsenic from excavated rock in the presence of sulfate ions under different redox conditions. The results showed that the re-release of arsenic was mainly regulated by iron dissolution, even in the presence of sulfate ions. This suggests that excavated marine sedimentary rock should be reused under redox conditions where iron is not reduced or treated with chemical immobilization.
ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
(2022)
Article
Environmental Sciences
Hiroki Kitamura, Masato Ueshima, Seungki Back, Noppharit Sutthasil, Hirofumi Sakanakura, Tomonori Ishigaki, Masato Yamada
Summary: By adding diatomite to APC residues, the leaching of toxic metals can be significantly reduced through the pozzolanic reaction, demonstrating the potential for using diatomite as a pretreatment method for APC residues.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Keiko Tagami, Tetsuo Yasutaka, Momo Takada, Shigeo Uchida
Summary: This study focused on Tag data collected from 2016 to 2020 to assess long-term ingestion doses from wild mushrooms. Results showed that there were significant differences in Tag values among different species of wild mushrooms.
JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
(2021)
Article
Multidisciplinary Sciences
Masashi Kamo, Michio Murakami, Wataru Naito, Jun-ichi Takeshita, Tetsuo Yasutaka, Seiya Imoto
Summary: The study assessed the effectiveness of COVID-19 testing systems in small sports teams. The results showed that routine PCR testing did not significantly increase the detection of infected individuals.
Article
Multidisciplinary Sciences
Momo Takada, Tetsuo Yasutaka, Seiji Hayashi, Mai Takagi, Keiko Tagami
Summary: The study determined the aggregated transfer factor (T-ag) values for 10 common edible wild plant species in northeastern Japan using a combination of actual measurements and publicly available data. The results showed that T-ag values of perennial spermatophytes and pteridophytes declined exponentially, while tree species showed no distinct temporal change. Tree species had higher T-ag values compared to spermatophyte and pteridophyte perennials.
SCIENTIFIC REPORTS
(2022)
Article
Green & Sustainable Science & Technology
Trong Lam Nguyen, Van Tuan Nguyen, Hoang Giang Nguyen, Akihiro Matsuno, Hirofumi Sakanakura, Ken Kawamoto
Summary: The construction industry has high potential for the circular economy and the reuse and recycling of construction and demolition waste (CDW) is crucial for sustainable urban development. This study investigates the practical application of recycled clay brick aggregates (RCBs) and recycled concrete aggregates (RCAs) in unbound roadbed materials in Vietnam through various tests. The results indicate that the maximum amount of RCBs added to RCAs in unbound roadbed materials should be less than 30%. Additionally, the mixing proportions of RCBs and RCAs, maximum aggregate diameter, gradation of aggregates, and initial moisture condition are found to control the saturated hydraulic conductivity. The study also examines the particle breakage characteristics under compaction and proposes an effective method for estimating the mixing proportions of RCAs and RCBs in the fine fraction to understand the particle breakage mechanism.
Article
Environmental Sciences
Tetsuo Yasutaka, Michio Murakami, Yuichi Iwasaki, Wataru Naito, Masaki Onishi, Tsukasa Fujita, Seiya Imoto
Summary: There is a need to evaluate and minimize the risk of novel coronavirus infections at mass gathering events. This study found that wearing face masks and hand washing can reduce the infection risk by 86-95%. Vaccination can reduce the infection risk by 36-96%. The number of spectators and the capacity proportion also impact the infection risk and the number of newly infected individuals. Organizers should ensure prevention compliance and limit the number of spectators according to local infection prevalence.
MICROBIAL RISK ANALYSIS
(2022)
Article
Multidisciplinary Sciences
Momo Takada, Kosuke Shirai, Michio Murakami, Susumu Ohnuma, Jun Nakatani, Kazuo Yamada, Masahiro Osako, Tetsuo Yasutaka
Summary: This study used a web-based questionnaire to examine the relative importance of various factors in the choice of final disposal sites for decontaminated materials after the Fukushima nuclear accident. The results showed that the public values the distance between disposal sites and residential areas, as well as procedural and distributive fairness, over the volume and radioactivity of the materials.
Article
Multidisciplinary Sciences
Michio Murakami, Tsukasa Fujita, Pinqi Li, Seiya Imoto, Tetsuo Yasutaka
Summary: A developed environmental exposure model was used to estimate the COVID-19 risk among participants at outdoor music festivals. The model was validated using real events in Japan and Spain, and the results showed the effectiveness of additional infection control measures such as antigen tests, mask-wearing, disinfection, and vaccination in reducing the risk of infection.
Article
Environmental Sciences
Qianhui Wang, Jining Li, Fenghe Wang, Hirofumi Sakanakura, Carlito Baltazar Tabelin
Summary: In this study, 2% magnesia (MgO) was used to immobilize geogenic arsenic (As) and lead (Pb) in excavated marine sedimentary material. The immobilization efficiency was evaluated under different environmental scenarios, including wet-dry cycles, freeze-thaw cycles, and anaerobic incubation. The results showed that MgO addition significantly reduced the leachability of As and Pb, providing a sustainable management strategy for contaminated marine sedimentary materials.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Sereyroith Tum, Shinji Matsumoto, Miu Nishikata, Tetsuo Yasutaka
Summary: Understanding the seasonal groundwater quality changes in waste rock dumps in temperate continental climate is essential for preventing environmental risks and managing legacy mine contamination. This research conducted a field investigation of a waste rock dump to determine the mechanisms controlling the dynamics of groundwater quality. Monitoring wells were installed to investigate pH, electrical conductivity, and groundwater level, and samples were collected for chemical analysis. The study found that rainfall, river water, and snowmelt were the sources of groundwater recharge, which affected the behavior of heavy metals in the waste rock dump through dissolution and dilution processes.
Article
Health Care Sciences & Services
Cyrus Ghaznavi, Daisuke Yoneoka, Takayuki Kawashima, Akifumi Eguchi, Michio Murakami, Stuart Gilmour, Satoshi Kaneko, Hiroyuki Kunishima, Wataru Naito, Haruka Sakamoto, Keiko Maruyama-Sakurai, Arata Takahashi, Yoshihiro Takayama, Yuta Tanoue, Yoshiko Yamamoto, Tetsuo Yasutaka, Hiroaki Miyata, Shuhei Nomura
Summary: This study aimed to assess the factors related to reversals of vaccine willingness. The findings showed that several covariates, including marital status, influenza vaccine history, COVID-19 infection/testing history, engagement in COVID-19 preventive measures, perceived risks/benefits of the COVID-19 vaccine, and attitudes regarding vaccination policies and norms, significantly predicted vaccine hesitancy. The use of certain information sources was also associated with vaccine hesitancy.
LANCET REGIONAL HEALTH-WESTERN PACIFIC
(2022)
Article
Health Care Sciences & Services
Shuhei Nomura, Akifumi Eguchi, Daisuke Yoneoka, Michio Murakami, Cyrus Ghaznavi, Stuart Gilmour, Satoshi Kaneko, Takayuki Kawashima, Hiroyuki Kunishima, Wataru Naito, Haruka Sakamoto, Keiko Maruyama-Sakurai, Arata Takahashi, Yoshihiro Takayama, Yuta Tanoue, Yoshiko Yamamoto, Tetsuo Yasutaka, Hiroaki Miyata
Summary: This study investigated the changes in intention to accept COVID-19 vaccination among Japanese adults, identifying six and five sub-populations respectively, and found that perceived benefits, social significance, and safety of the vaccine are important factors influencing hesitant individuals to change their minds.
LANCET REGIONAL HEALTH-WESTERN PACIFIC
(2022)