Article
Engineering, Environmental
Oluchi Okoro, Kim Lompe, Isabelle Papineau, Morgan Solliec, Louis Fradette, Benoit Barbeau
Summary: The study found that ballasted flocculation alone is not efficient for benzene removal and the addition of PAC is necessary. Simultaneous addition of PAC and coagulant reduced benzene concentration substantially, but could not meet the Canadian threshold concentration.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Environmental Sciences
Erlend Sormo, Ludovica Silvani, Nora Bjerkli, Nikolas Hagemann, Andrew R. Zimmerman, Sarah E. Hale, Caroline B. Hansen, Thomas Hartnik, Gerard Cornelissen
Summary: Biochars have been shown to effectively reduce PFAS leaching in contaminated soils. This study produced and tested eight different waste timber biochars, with varying activation levels and production methods. The results suggest that the sorption capacity of biochars is influenced by activation degree, temperature, and soil organic carbon content.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Md. Aminur Rahman, Dane Lamb, Mohammad Mahmudur Rahman, Md Mezbaul Bahar, Peter Sanderson, Sepide Abbasi, A. S. M. Fazle Bari, Ravi Naidu
Summary: A novel biochar metal oxide composite was synthesized for effective removal of arsenate (As(V)) from aqueous solution. The Zr-Fe composite biochar showed the greatest As(V) removal efficiency among the tested materials. The synthesized materials exhibited high sorption capacity, excellent reusability and stability.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Jin Zhu, Yinan Song, Liuwei Wang, Zhuorong Zhang, Jing Gao, Daniel C. W. Tsang, Yong Sik Ok, Deyi Hou
Summary: In this study, a biochar supported iron sulfide composite was synthesized and utilized as a persulfate activator for benzene removal from contaminated groundwater. The system showed excellent performance in benzene adsorption and degradation, with the optimal conditions of 1 g L-1 dosage of the composite and 3 mM PS concentration. The FexSy@biochar exhibited long-term effectiveness for PS activation and could be a sustainable alternative for contaminated groundwater remediation.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Shahid Saqlain, Shufang Zhao, Soong Yeon Kim, Young Dok Kim
Summary: The study showed that pre-treating activated carbon with HNO3 can enhance toluene removal efficiency under light exposure. Shorter wavelengths of visible light were more effective in toluene removal compared to longer wavelengths. Activated carbon can sustain its photocatalytic activity when mixed with cement, indicating its potential applications in airpurifying building materials.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Physical
Miyeon Jeong, Shufang Zhao, Yujing Ji, Sher Ali Khan, Shahid Saqlain, Young Dok Kim
Summary: The removal efficiencies of benzene and ammonia using commercial activated carbon were studied under different relative humidity conditions and with or without visible light irradiation. The results showed that light could enhance the removal efficiency of benzene even under nitrogen, and the effect was more significant in the presence of water and oxygen. It was also found that visible light irradiation could enhance the ammonia removal efficiency under optimal humidity conditions. The study further suggested that light and water facilitated more efficient migration of NH3 through the nanoporous channels of activated carbon. Fourier-transform infrared (FT-IR) analyses revealed the changes in surface structure of activated carbon caused by oxidizing agents generated with light irradiation and other reagents.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Mehmet Sakir Ece
Summary: Fe3O4/AC@SiO2@Sulfanilamide magnetic nanoparticles were successfully synthesized and applied for the adsorption of toluene and benzene. The maximum adsorption capacity for toluene and benzene was found to be 612 and 557 mg/g, respectively. With easy synthesis process, high adsorption capacity, and reusability, these magnetic nanoparticles show promise as an effective adsorbent.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Green & Sustainable Science & Technology
Iftikhar Ahmad, Abdul Ghaffar, Ali Zakir, Zia Ul Haq Khan, Muhammad Farhan Saeed, Atta Rasool, Aftab Jamal, Adil Mihoub, Simone Marzeddu, Maria Rosaria Boni
Summary: Arsenic is a widespread environmental pollutant that causes serious health and economic issues. In this study, the ability of chemical treatment solutions to activate the sorption capacity of cotton stalk biochar (CSB) for removing arsenic from contaminated drinking water was evaluated. It was found that chemical modification of biochar significantly increased its surface area and pore volume, with the highest observed in the nitric acid-treated biochar (HN-CSB). HN-CSB proved to be an effective and cost-efficient adsorbent for arsenic removal.
Article
Engineering, Environmental
Ronald Ranguin, Matthieu Delannoy, Christelle Yacou, Corine Jean-Marius, Cyril Feidt, Guido Rychen, Sarra Gaspard
Summary: This study aimed to valorize an invasive brown macroalga through the production of biochars and activated carbons to reduce the environmental availability of chlordecone in soils, ultimately aiming to protect the ecosystem from its negative impacts.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Review
Environmental Sciences
Saravanan Praveen, Josephraj Jegan, Thillainayagam Bhagavathi Pushpa, Ravindiran Gokulan, Laura Bulgariu
Summary: This review summarizes the recent research on the use of biochar as a biosorbent for the removal of organic and inorganic pollutants, focusing on the dye removal field. The characteristics of biochar and the mechanisms of biosorption have been extensively studied, and biosorption models are useful for evaluating the efficiency of biochar as a biosorbent for dye removal techniques.
Article
Chemistry, Multidisciplinary
Xiaoyan Wang, Lu Chen, Changfu Li, Yongchao Xiao, Yuchen Gao, Yaochun Liu, Yuanhua Lin, Junping Ding
Summary: This study investigated a novel indoor air purification material with excellent adsorption and photocatalytic performance, which can efficiently degrade harmful gases such as toluene.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Environmental
Song He, Guibin Shi, Huan Xiao, Guoxiang Sun, Yanjuan Shi, Guanyu Chen, Huaming Dai, Bihe Yuan, Xianfeng Chen, Xiaobing Yang
Summary: In this study, lignin-based pitch extracted from black liquor was used as a precursor for synthesizing activated carbon with high specific surface area and pore volume through chemical activation with potassium hydroxide. The optimized activated carbon (PAC-5-850-60) showed excellent adsorption performance for gaseous benzene. The study explored the adsorption behavior and mechanism of PACs, demonstrating their potential as efficient absorbents for removing gaseous benzene.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Biochemistry & Molecular Biology
Diana Hernandez-Monje, Liliana Giraldo, Juan Carlos Moreno-Pirajan
Summary: The liquid-phase adsorption of toluene in cyclohexane and hexane solutions on modified activated carbons was evaluated. Thermal treatment generated modifications that favored adsorption and interaction with the evaluated solutions. Cyclohexane could create greater competition with the adsorption sites, but it favored the increase in adsorption capacities.
Review
Chemistry, Multidisciplinary
Eric Lichtfouse, Nadia Morin-Crini, Corina Bradu, Youssef-Amine Boussouga, Mehran Aliaskari, Andrea Iris Schaefer, Soumya Das, Lee D. Wilson, Michihiko Ike, Daisuke Inoue, Masashi Kuroda, Sebastien Deon, Patrick Fievet, Gregorio Crini
Summary: Contamination of waters by metals, metalloids, and organometallic pollutants is a global health issue. The presence of selenium, particularly at high concentrations in water, is a growing concern, especially in developing countries. Selenium is difficult to remove due to its presence in complex mixtures and competition with other anions. Remediation methods rely on various techniques such as zero-valent iron, nanofiltration, and activated granular sludge.
ENVIRONMENTAL CHEMISTRY LETTERS
(2022)
Review
Chemistry, Multidisciplinary
Hercules Abie Pereira, Paola Rosiane Teixeira Hernandes, Matias Schadeck Netto, Gabriel Diogo Reske, Viviane Vieceli, Luis Felipe Silva Oliveira, Guilherme Luiz Dotto
Summary: Glyphosate is an herbicide used for weed control in agriculture, but it is also considered a potentially carcinogenic pollutant, leading to soil and water contamination. Advanced techniques are needed to remove glyphosate from the environment.
ENVIRONMENTAL CHEMISTRY LETTERS
(2021)
Article
Geochemistry & Geophysics
Abdul Latif Ashadi, Yardenia Martinez, Panagiotis Kirmizakis, Tilman Hanstein, Xiayu Xu, Abid Khogali, Andri Yadi Paembonan, Ahmed AlShaibani, Assem Al-Karnos, Maxim Smirnov, Kurt Strack, Pantelis Soupios
Summary: This study conducted a high-power CSEM survey in Half Moon Bay, Saudi Arabia, aiming to verify the technology and successfully detect and characterize potential economic brines in the area. By collecting, evaluating, processing, and interpreting various transmitter-receiver configurations, acquisition parameters, and passive and active EM data, the subsurface was characterized. LOTEM and FSEM configurations were proven to provide high-quality data.
Article
Astronomy & Astrophysics
Ignatius Argadestya, Abduljamiu O. Amao, Candice C. Bedford, Pantelis Soupios, Khalid Al-Ramadan
Summary: This study investigates the mineralogical, elemental, and spatial variability in volcaniclastics from the Merapi basalt-andesitic stratovolcano in Java, Indonesia. Statistical analysis helps differentiate between different depositional environments like fluvial, fluvio-coastal-aeolian, and marine influenced deposits.
EARTH AND SPACE SCIENCE
(2022)
Article
Chemistry, Analytical
Paul Edigbue, Ismail Demirci, Irfan Akca, Hamdan Hamdan, Panagiotis Kirmizakis, Pantelis Soupios, Markos Tranos, Israa S. Abu-Mahfouz, Emin Candansayar, Sherif Hanafy, Abdullatif Al-Shuhail
Summary: The main geological structures in the Dammam Dome were studied by integrating geophysical measurements and applying new methodological approaches. The results demonstrate the capability of using combined local and global optimization techniques to estimate model parameters and provide high-resolution subsurface images.
Article
Environmental Sciences
S. M. Seyedpour, C. Henning, P. Kirmizakis, S. Herbrandt, K. Ickstadt, R. Doherty, T. Ricken
Summary: In order to improve the usefulness of groundwater flow models, it is necessary to reduce uncertainty associated with major parameters like permeability. A coupled Random Field and extended Theory of Porous Media (eTPM) simulation is used to develop a robust model that reduces uncertainty and is validated with a physical sandbox experiment. The results show that random field realizations of permeability can strongly affect contaminant arrival time compared to a homogenous parameter model.
Article
Chemistry, Multidisciplinary
Paul Edigbue, Ismail Demirci, Irfan Akca, Hamdan Ali Hamdan, Panagiotis Kirmizakis, Pantelis Soupios, Emin Candansayar, Sherif Hanafy, Abdullatif Al-Shuhail
Summary: Non-uniqueness is a challenge in geophysical inversions. This study proposes a combined local and global optimization approach to tackle this challenge. By jointly estimating the physical model parameters in direct current resistivity and seismic refraction data, this method shows improved anomaly delineation.
APPLIED SCIENCES-BASEL
(2022)
Article
Environmental Sciences
Panagiotis Kirmizakis, Hector R. Hinojosa-Prieto, Fotios Bilias, Pantelis Soupios
Summary: The historic manure stockpile was sampled and analyzed to determine its nutrient content for potential use as a soil amendment. The results showed that manure can be used as a soil amendment, but specific nutrient requirements vary for different crops and land conditions. There were no negative issues found that would prevent land application of the manure.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Constantinos Loupasakis, Paraskevas Tsangaratos, Theodoros Gatsios, Vasiliki Eleftheriou, Issaak Parcharidis, Panteleimon Soupios
Summary: The objective of this study was to investigate the stability of the Acropolis Hill, Greece, by developing a Rock Instability Model (RIM) based on fuzzy logic and remote sensing techniques. RIM identified locations on the rock formations of the Acropolis Hill that were potentially unstable due to geomorphological factors, weathering, and erosive processes. The study highlighted the significant variables of lithology and slope angle in contributing to the overall stability of the Acropolis Hill, with the outcomes of the RIM model verified by remote sensing data and field observation.
Article
Geochemistry & Geophysics
Cesar Barajas-Olalde, Donald C. Adams, Ana Curcio, Sofia Davydycheva, Ryan J. Klapperich, Yardenia Martinez, Andri Y. Paembonan, Wesley D. Peck, Kurt Strack, Pantelis Soupios
Summary: The Controlled-Source ElectroMagnetic (CSEM) method is crucial for obtaining information about reservoir fluids and their spatial distribution. It has a wide range of applications in CO2 storage, enhanced oil recovery (EOR), geothermal exploration, and lithium exploration. By customizing the components of a multi-component system, the CSEM method can be tailored to specific reservoir objectives. Optimizing data acquisition and analysis ensures high-quality data sets for processing and interpretation.
Article
Geosciences, Multidisciplinary
Ali Imran Sandhu, Umair bin Waheed, Chao Song, Oliver Dorn, Pantelis Soupios
Summary: This paper proposes a simple fully-connected PINN model to address long-standing challenges in seismic modeling and inversion, and evaluates its potential in interpolating and extrapolating scattered wavefields at multiple frequencies. The issue of spectral bias is tackled by incorporating the Kronecker neural network architecture with composite activation functions formed using atan, elu, l-sin, and l-cos. Numerical results demonstrate the efficacy of the proposed approach in fast and accurate, anisotropic multi-frequency wavefield modeling.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Computer Science, Information Systems
Ali Imran Sandhu, Ben Mansour Dia, Oliver Dorn, Pantelis Soupios
Summary: This study assesses the quality of the measured data from a network of sensors by calculating the expected text Kullback-Leibler divergence between the prior and posterior distributions. The Laplace approximation method is used to reduce computational cost and improve the quality of inversion.
Article
Multidisciplinary Sciences
Paul Edigbue, Irfan Akca, Ismail Demirci, Abdullatif Al-Shuhail, Hamdan Ali Hamdan, Panagiotis Kirmizakis, Emin Candansayar, Sherif Hanafy, Pantelis Soupios
Summary: This study compared the optimization capability of five global optimization techniques in geophysical data processing and interpretation, and found that genetic algorithm (GA) and particle swarm optimization (PSO) can satisfactorily reduce errors in direct current resistivity and seismic refraction data processing.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)
Article
Multidisciplinary Sciences
Abdul Latif Ashadi, Bulent Tezkan, Pritam Yogeshwar, Tilman Hanstein, Panagiotis Kirmizakis, Abid Khogali, Konstantinos Chavanidis, Pantelis Soupios
Summary: Several studies suggest that Saudi Arabia has promising geothermal resources, with the most notable location being the Ain Al-Harrah hot spring near Al-Lith. By investigating the potential of geothermal resources in this area, it was found that there is a conductive anomaly related to a geothermal heat source, high resistive zones associated with hard-rock geological formations, and a medium resistive body possibly indicating a pathway for geothermal fluids.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)