Article
Engineering, Civil
Roger Gonzalez-Herrera, Patricia Vazquez-Mujica, Javier Canto-Rios
Summary: Hydrogeochemical tools were used to assess the impact of municipal waste leachate on the balance of a karstic aquifer. The study area was the aquifer beneath the old municipal waste disposal site in Merida, Mexico. A contaminant plume was detected through the presence of chloride ions. Groundwater samples were collected from boreholes along a flow line downstream of the dump site. Analysis of the carbonate system parameters revealed a decrease in calcium and magnesium concentrations due to high pCO2 values, caused by the decomposition of waste. Carbonate minerals tended to dissolve in mixed waters with a higher percentage of leachate. Inverse modeling showed the migration of minerals between boreholes along the groundwater flow line. This study concludes that leachate affects the carbonate balance in aquifers and behaves similarly to leachate-contaminated aquifers in other studies.
JOURNAL OF HYDROLOGY
(2023)
Article
Environmental Sciences
Henghua Zhu, Jianwei Zhou, Zhizheng Liu, Lizhi Yang, Yunde Liu
Summary: This study analyzed the impact of chemical acidic wastewater on the hydrochemical characteristics of karst groundwater, finding that the acidity of the wastewater, containing hydrochloric acid and sulfuric acid, led to pollution of the groundwater by dissolving carbonate rocks. The increased concentrations of Ca2+, Mg2+, Sr, Cl- and SO42- in the karst groundwater exceeded the quality indexes of class III water in China's standard for groundwater quality.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2021)
Article
Environmental Sciences
Aboubakar Sako, Sayoba Kafando
Summary: The study in central Burkina Faso's semi-arid region highlighted the reliance on groundwater from basement rock aquifers for potable uses. The groundwater quality was found to be generally good for human consumption, with most borewells producing suitable water. However, some borewells had concentrations of arsenic and fluoride that exceeded permissible limits. The study also identified the origins of high arsenic and fluoride concentrations in groundwater, as well as the key geochemical processes influencing solute acquisition.
ENVIRONMENTAL EARTH SCIENCES
(2021)
Article
Environmental Sciences
Kun Ren, Jie Zeng, Jiapeng Liang, Daoxian Yuan, Youjun Jiao, Cong Peng, Xiaodong Pan
Summary: The study reveals that the impact of AMD waters on karst aquifers is primarily manifested in the control of water quality by their chemical composition, leading to contamination of groundwater, making the water resources in the area unsuitable for irrigation and drinking, and promoting the dissolution of carbonates, releasing more CO2 into the atmosphere.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Geochemistry & Geophysics
Chong Jiang, Haixia Han, Hansong Xie, Jing Liu, Zhao Chen, Huawei Chen
Summary: This study provides two new analytical solutions for high-pressure water tunnels in caverns, which can be used to predict seepage inflow and seepage force in actual engineering. The research shows that there is a consistent curve relationship between the analytical solution and numerical solution as the permeability coefficient beta increases, and beta also changes when tunnel structural parameters vary.
Article
Environmental Sciences
Tingting Yang, Guangquan Xu, Kai Chen, Gui Sun, Baoquan Dang, Mancai Liu
Summary: This study systematically summarizes and analyzes the development of Karst collapse columns (KCCs), classifying them into different stages. The results show that KCCs have a three-stage development process: growing stage, declining stage, and dead stage. Combining various geological and hydrological data, evolutionary models for KCC development are established. This research provides essential references for understanding the mechanism of water inrush and prevention of KCCs in Northern China.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Civil
Anna Rita Scorzini, Mario Di Bacco, Gaetano De Luca, Marco Tallini
Summary: This study investigates the possibility of using memory-enabled deep learning algorithms as meaningful tools in modeling the hydrological response of karst aquifers to earthquakes. By leveraging monitoring data for the Gran Sasso carbonate aquifer during significant seismic sequences, the study trains and validates long short-term memory networks (LSTM) for flow forecasting exercises. The results suggest that these models have the potential for hydrological applications in similar areas.
JOURNAL OF HYDROLOGY
(2023)
Article
Geochemistry & Geophysics
Changsuo Li, Xingzhou Zhang, Xubo Gao, Chengcheng Li, Chunfang Jiang, Wen Liu, Guangqi Lin, Xin Zhang, Jiancong Fang, Lijun Ma, Xiubo Zhang
Summary: This study investigates the factors and processes leading to karst water quality degradation through a hydrogeochemical investigation and modeling. The main findings include the influence of human activities and global changes on the degradation of karst water quality.
Article
Environmental Sciences
Masilamani Palanisamy, Thanuja R. Krishnan, Abdul S. Rahaman, Killivalavan Jothiramalingam, Ilakiya Thiyagarajan, Siva P. Kumar
Summary: This study assesses the groundwater quality in the Perambalur district of Tamil Nadu, India. The results indicate that the groundwater quality in this area has been negatively impacted by the usage of chemical fertilisers, pesticides, and mining activities. The hydrogeochemical assessment reveals changes in major ions and hardness in the groundwater, with groundwater chemistry being controlled by reverse ion exchange. Furthermore, the study finds a decline in groundwater quality during the post-monsoon season.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Geosciences, Multidisciplinary
Pier Luigi Bragato
Summary: This study explores how karst water recharge may systematically trigger major earthquakes in northeastern Italy, with statistical analysis showing a significant time correlation between earthquakes and the Palmer Drought Severity Index. The analysis extended back to the last millennium, revealing a time correlation between destructive earthquakes and ice extension peaks in the European Alps.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Environmental Sciences
Ruiqiang Yuan, Zhibin Li, Siyu Guo
Summary: Rapid economic development often leads to groundwater degradation, posing health risks to those who rely on it. This study analyzed the health risks of shallow groundwater in five basins in Shanxi Province, China, based on the hydrochemical evolution and water quality assessment. The results showed that arsenic and chromium were the major contributors to health risks in the shallow groundwater, followed by fluoride and nitrate. Various natural and anthropogenic factors were found to be closely related to groundwater health risks, with basin topography being one of the key factors.
ENVIRONMENTAL POLLUTION
(2023)
Article
Environmental Sciences
Vynotdni Rathinasamy, Edy Tonnizam Mohamad, Ibrahim Komoo, Mariatul Kiftiah Ahmad Legiman, Nurul Amaniyah Romanah, Muhammad Nassir Bin Hanapi
Summary: This study assesses the quality and hydrogeochemistry of the rock aquifer in Jurong Formation in Southern Johor Bahru. The groundwater in this area is fresh, with a non-saline composition and varying hardness. The pH and hardness of the groundwater are significantly different between the source and floodplain zones. The study also found differences in the quality and hydrogeochemistry of the rhyolitic tuff aquifer in the South-West Johor Rivers Basin.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2023)
Article
Environmental Sciences
Naoyuki Yoshihara, Shinji Matsumoto, Ryosuke Umezawa, Isao Machida
Summary: Catchment water quality is crucial for ecosystem and water resource management in mountainous areas. Shallow landslides triggered by earthquakes or heavy rainfall can greatly affect stream water quality. However, there is limited understanding about the impact of densely distributed shallow landslides on catchment-scale stream water chemistry. This study investigated the major ion concentrations and isotopic compositions of stream water in 37 headwater subcatchments in southern Hokkaido, Japan, where a significant earthquake caused numerous shallow landslides. The findings reveal the relationship between landslide area and stream water chemistry, and suggest a more versatile approach to evaluate water pollution triggered by shallow landslides.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Jinchao Li, Weiping Wang, Wenliang Li
Summary: Jinan, China is famous for its springs, but recent development has affected the natural water cycle. Managing aquifer recharge is an effective method, and this study focuses on the effects of diverting water from local surface sources to recharge groundwater. A simulation model was built, and the results show that a 90% recovery ratio scheme yields the highest TDS reduction efficiency and benefits the economy.
Article
Engineering, Civil
M. Silva, A. M. L. Goncalves, W. A. Lopes, M. T. Lima, C. T. F. Costa, M. Paris, P. R. A. Firmino, F. J. De Paula Filho
Summary: Groundwater is the main water source for populations in arid and semiarid regions globally. This study assessed groundwater quality in the Araripe Sedimentary Basin in Brazil, finding certain key variables exceeded regulatory limits in areas affected by human activities. The use of water quality tools and indices can help prioritize areas for mitigation and monitoring actions to manage groundwater resources effectively.
JOURNAL OF HYDROLOGY
(2021)
Article
Geography, Physical
M. Magdalena Velazquez-Bucio, Maria Francesca Ferrario, Eliana Muccignato, Sabina Porfido, Aadityan Sridharan, Kervin Chunga, Franz Livio, Sundararaman Gopalan, Alessandro Maria Michetti
Summary: In this study, we investigate the Earthquake Environmental Effects (EEEs) generated by two earthquakes along the Mexican subduction zone with different source parameters. We document the EEEs and assign intensity values using the ESI-2007 scale, compare their attenuation with other subduction zone earthquakes worldwide, and demonstrate the repeatability of EEEs. This work represents the first application of the ESI-2007 scale to an intraslab earthquake and highlights the importance of considering EEEs in seismic hazard assessment procedures.
QUATERNARY INTERNATIONAL
(2023)
Article
Environmental Sciences
Gilberto Binda, Francesca Frascoli, Davide Spanu, Maria F. Ferrario, Silvia Terrana, Roberto Gambillara, Sara Trotta, Paula J. Noble, Franz A. Livio, Andrea Pozzi, Alessandro M. Michetti
Summary: This study applies geochemical markers to characterize and understand the recharge areas of the multi-layer urban aquifer in Como city, Italy. The analysis reveals differences in water chemistry between shallow and deep aquifers, as well as differences in trace elements derived from sediment-water interaction. An anomalous concentration of arsenic in the deep aquifer suggests the need for further analysis to understand its origin in the water. The study demonstrates the potential of geochemical markers in characterizing factors affecting natural water quality and reconstructing recharge areas.
Article
Geochemistry & Geophysics
Kerry Schmidtbauer, Paula Noble, Michael Rosen, Daniel J. Conley, Patrick J. Frings
Summary: This study investigates the role of lake processes in determining the silicon isotope ratios of dissolved silicon and diatom biogenic silica in lakes. The research findings show species-specific fractionations of silicon isotopes in lakes, indicating the potential of using silicon isotopes as a paleolimnological proxy. Additionally, the study discusses the mass balance of silicon in lakes.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Geography, Physical
Maria Francesca Ferrario, Franz Livio, Alessandro Maria Michetti
Summary: The Environmental Seismic Intensity scale (ESI-07) has proven to be particularly useful in documenting earthquake damage in remote regions, strong events, and areas closer to the epicenter. It provides complementary information to other macroseismic scales and generally agrees with or slightly exceeds their estimates of epicentral intensity. However, discrepancies become more pronounced for earthquakes with high ESI-07 epicentral intensity, where other scales tend to saturate.
QUATERNARY INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Arianna Bellasi, Gilberto Binda, Ginevra Boldrocchi, Andrea Pozzi, Roberta Bettinetti
Summary: This research aims to understand the sources of plastic litter in freshwater environments and the production of secondary microplastics. The study found that the most abundant polymers on beaches are polypropylene and polyethylene, which make up 73% of the collected polymers. Additionally, commonly used manufactured items constitute a significant portion of the litter. The research also indicated that the abundance of beached litter is mainly influenced by beach accessibility and local winds.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Analytical
Gilberto Binda, Davide Faccini, Martina Zava, Andrea Pozzi, Carlo Dossi, Damiano Monticelli, Davide Spanu
Summary: Biochar produced from marine microalgae at low temperature demonstrates superior adsorption performance for lead (II) ions compared to nutshell-derived biochar. Furthermore, when used to decorate carbon electrodes, microalgae-derived biochar significantly enhances the electroanalytical performances for voltammetric detection of lead (II) ions.
Article
Zoology
Sarah Trubovitz, Johan Renaudie, David Lazarus, Paula Noble
Summary: This study focuses on a review of 101 lophophaenid taxa found in marine sediments from the Late Neogene to the Recent period, particularly in the eastern equatorial Pacific. It addresses the challenges in classifying lophophaenids due to their small size, complex morphology, and weak taxonomic framework. The researchers discuss existing lophophaenid genera and describe new species and genera, providing a practical framework for identifying and understanding these organisms.
Article
Environmental Sciences
Gilberto Binda, Giorgio Zanetti, Arianna Bellasi, Davide Spanu, Ginevra Boldrocchi, Roberta Bettinetti, Andrea Pozzi, Luca Nizzetto
Summary: Pollution by plastic and microplastic has global environmental impacts. This study proposes a multi-tiered approach to studying the ageing of polyethylene plastic fragments in the environment. The results suggest that biofouling plays a pivotal role in the ageing of plastic, while UV radiation and water solutions also have an influence.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Geography, Physical
Sambit Prasanajit Naik, Asmita Mohanty, Himanshu Mittal, Sabina Porfido, Alessandro Maria Michetti, Benjamin Ming Yang, Ohsang Gwon, Young-Seog Kim
Summary: The research reevaluates the macroseismic intensity of the 2018 Hualien earthquake in Taiwan using the Environmental Seismic Intensity (ESI-07) scale and compares it to the 1951 Hualien earthquake. The study highlights the importance of documentation and historical earthquake records in accurately assessing seismic intensity.
QUATERNARY INTERNATIONAL
(2023)
Article
Multidisciplinary Sciences
Zoe K. Mildon, Gerald P. Roberts, Joanna P. Faure Walker, Joakim Beck, Ioannis Papanikolaou, Alessandro M. Michetti, Shinji Toda, Francesco Iezzi, Lucy Campbell, Kenneth J. W. McCaffrey, Richard Shanks, Claudia Sgambato, Jennifer Robertson, Marco Meschis, Eutizio Vittori
Summary: This study quantifies the observed earthquake clustering phenomenon and suggests that fluctuating stress during fault/shear-zone interactions can explain changes in strain-rate and slip-rate, leading to earthquake clustering.
NATURE COMMUNICATIONS
(2022)
Article
Biology
Sarah Trubovitz, Johan Renaudie, David Lazarus, Paula J. Noble
Summary: Contrary to the expectation of neutral theory, the abundance or rarity of species in the fossil record does not predict their longevity in ocean ecosystems. Limited empirical studies have shown that species with low abundances are not necessarily more prone to extinction.
COMMUNICATIONS BIOLOGY
(2023)
Article
Chemistry, Analytical
Davide Spanu, Aicha Dhahri, Gilberto Binda, Damiano Monticelli, Marco Pinna, Sandro Recchia
Summary: This study explores an ultrarapid electrochemical self-doping procedure to enhance the performance of anodic titanium dioxide nanotube arrays for electroanalytical and photocatalytic applications. The self-doping process creates surface Ti3+ states and proves to be a simpler and cleaner method compared to traditional doping strategies. The treated nanotubes show improved electrochemical activity and photocatalytic performance.
Article
Biochemical Research Methods
Marco Pinna, Arianna Signorelli, Gilberto Binda, Carlo Dossi, Laura Rampazzi, Davide Spanu, Sandro Recchia
Summary: This article introduces a clean and safe microwave-assisted digestion procedure for ultra-trace analysis. The procedure involves the evaporative migration of HF inside a sealed vessel-inside-vessel system, allowing for the efficient removal of HF and overcoming the issues associated with traditional evaporation methods.
METHODS AND PROTOCOLS
(2022)
