Article
Engineering, Environmental
Nikita Yadav, Hyun-Jo Ahn, Mayur B. Kurade, Yongtae Ahn, Young -Kwon Park, Moonis Ali Khan, El-Sayed Salama, Xiangkai Li, Byong-Hun Jeon
Summary: This study evaluated the toxicity of five common bisphenols (BPs) on the freshwater microalga Chlamydomonas mexicana and the removal of BPs by the alga. BPAF, BPB, and BPZ showed higher toxicity to C. mexicana compared to BPS and BPF. The alga effectively removed BPs, with removal rates ranging from 61% to 99%. The results provide important information on the ecotoxicity of these BPs and their removal by C. mexicana, and the resulting biomass has potential for biodiesel production.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Chemistry, Physical
Marie-Louise Saboungi, Oleg Borodin, David L. L. Price, Bela Farago, Miguel A. A. Gonzalez, Shinji Kohara, Lucile Mangin-Thro, Andrew Wildes, Osamu Yamamuro
Summary: A new class of electrolytes, hybridizing aqueous with non-aqueous solvents, has been reported. The structure of an electrolyte composed of a mixture of LiTFSI-water and LiTFSI-dimethyl carbonate was measured using high-energy X-ray diffraction and polarized neutron diffraction. The results were compared with molecular dynamics simulations, which showed good agreement except for the prediction of intense scattering in partially deuterated samples, indicating a partial segregation between the two solvents not observed in experimental measurements.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Engineering, Environmental
Shuchi Liao, Masoud Arshadi, Matthew J. Woodcock, Zachary S. S. L. Saleeba, Dorothea Pinchbeck, Chen Liu, Natalie L. Capiro, Linda M. Abriola, Kurt D. Pennell
Summary: This study investigates the transport behavior of per- and polyfluoralkyl substances (PFAS) in the subsurface and the influence of nonaqueous-phase liquids (NAPLs). Experimental and mathematical modeling studies were conducted, and the results show that the presence of a representative NAPL, tetrachloroethene (PCE), affects the transport of PFAS in a quartz sand.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Environmental Sciences
Yufei Wang, Daniel Fernandez-Garcia, Guillem Sole-Mari, Paula Rodriguez-Escales
Summary: This study proposes an engineered injection and extraction (EIE) method to enhance the removal and mixing of liquid solutions in aquifers. The results show that EIE can significantly improve removal efficiency and mixing, especially under conditions of preferential channels, high permeability heterogeneity, and a mobility ratio larger than one.
WATER RESOURCES RESEARCH
(2022)
Review
Engineering, Environmental
Michel C. Boufadel, Wen Ji, Meghana Parameswarappa Jayalakshmamma, Charbel Abou Khalil, Stewart Abrams, Lin Zhao, Ada Wang
Summary: Nonaqueous phase liquids (NAPL) are often trapped in aquifers, with traditional removal techniques such as pumping water, hot water, air sparging, and vapor extraction effective for porous media with hydraulic conductivity greater than 10(-4)m/s. For lower permeability soils, electrokinetics (EK) is a suitable method, utilizing three different flows to remove hydrocarbons.
JOURNAL OF ENVIRONMENTAL ENGINEERING
(2021)
Article
Environmental Sciences
Shah Zada, Huiting Lu, Sikandar Khan, Arshad Iqbal, Adnan Ahmad, Aftab Ahmad, Hamid Ali, Pengcheng Fu, Haifeng Dong, Xueji Zhang
Summary: Microalgae were evaluated for their ability to remove Fe2+ iron ions from aqueous solutions, with five strains showing promising results in terms of bioremediation efficiency for both wastewater and soil. This study suggests that these selected microalgae strains have high potential as bioremediation tools for Fe2+ contaminated water and soil.
Article
Environmental Sciences
Alessandra Cecconi, Iason Verginelli, Renato Baciocchi
Summary: Radon has been widely proposed as a tracer for non-aqueous phase liquids in soil. This study examined the feasibility of using soil gas data at a distance from the source zone for the application of the radon deficit technique to identify and quantify NAPL contamination. The distance of the soil gas probe from the source zone was found to be the most influential parameter in the migration and distribution of radon in the subsurface.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Review
Geochemistry & Geophysics
Xueyan Lyu, Feng Xiao, Chongyang Shen, Jingjing Chen, Chang Min Park, Yuanyuan Sun, Markus Flury, Dengjun Wang
Summary: This study provides a comprehensive review of the fate and transport of PFAS in subsurface environments. It discusses the properties of PFAS and their impacts on transport behavior, explores the mechanisms and mathematical models for PFAS transport, and identifies challenges and future research priorities. The study is important for addressing the global challenges posed by PFAS contamination.
REVIEWS OF GEOPHYSICS
(2022)
Article
Biochemistry & Molecular Biology
Aisha Fahim, Onofrio Annunziata
Summary: The addition of small amounts of HEPES near physiological ionic strength is essential for converting protein-rich droplets into compact tetragonal crystalline microparticles, which exhibit small size, narrow size distribution, and guest-binding properties. The interactions between lysozyme and HEPES were found to be weakly attractive and exothermic. These findings suggest that salting-in type additives play an important role in controlling the fate of metastable protein-rich microdroplets.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Chemistry, Multidisciplinary
Mega Kar, Cristina Pozo-Gonzalo
Summary: Rechargeable batteries based on zinc show great potential in energy storage applications, but face challenges in commercialization due to dendritic growth and passivation of zinc. Recent advances in nonaqueous electrolytes offer advantages over aqueous systems, but there are still challenges to overcome in establishing rechargeable zinc batteries as a mainstream option.
CURRENT OPINION IN GREEN AND SUSTAINABLE CHEMISTRY
(2021)
Review
Green & Sustainable Science & Technology
Leonel E. Amabilis-Sosa, Edgardo I. Valenzuela, Javier A. Quezada-Renteria, Aurora M. Pat-Espadas
Summary: Biochar has gained attention for its low cost and unique properties, which make it useful for various applications. It has shown promise in remediation of heavy metal pollution by stimulating bacterial activity through adsorption, adhesion, electron transport, and ion exchange. However, further research is needed to fully understand its potential effects and to develop improved biochar technologies for metal bioremediation.
Article
Energy & Fuels
Xianhang Jin, Enze Ren, Yun Yang
Summary: Recent research has shown that nonaqueous absorbents for CO2 capture have become the focus in research institutes for their advantages such as energy efficiency and noncorrosiveness. The polarity parameter and dielectric constant of solvents mainly affect the phase separation behavior and CO2 solubility of nonaqueous absorbents. Additionally, nonaqueous absorbents with ethylene glycol monoethyl ether as solvent show optimal CO2 cyclic capacity and heat of CO2 absorption.
Article
Engineering, Environmental
Liangliang Lu, Zhibin Liu, Min Song, Quanbin Jin, Qingsong Zhang, Lining Yang
Summary: This study conducted thermal conductivity tests using a thermal probe method to investigate the thermal conductivity of NAPL-contaminated saturated soils. The results showed that the thermal conductivity varied in different stages with increasing NAPL content, and the quartz content was identified as a crucial factor influencing the thermal conductivity. Based on the results, a new model was proposed to accurately predict the thermal conductivity of NAPL-contaminated saturated soils.
JOURNAL OF ENVIRONMENTAL ENGINEERING
(2023)
Article
Engineering, Civil
Yanhong Zhang, Jichun Wu, Shujun Ye
Summary: Determining transient fluid saturations in a multi-phase system is crucial for understanding flow characteristics and effective subsurface remediation. This paper investigates models for quantifying fluid saturations of NAPL/Water/Gas in 2D porous media systems using a noninvasive light transmission technique, and proposes four light intensity-saturation models. The study shows that the model based on assumption A and drainage of water first is the most accurate, with strong linear correlation between calculated results and measured data.
JOURNAL OF HYDROLOGY
(2021)
Article
Environmental Sciences
Xuchen Yan, Bin Yang, Erkai He, Willie J. G. M. Peijnenburg, Ling Zhao, Xiaoyun Xu, Xinde Cao, Ana Romero-Freire, Hao Qiu
Summary: Direct discharge of chromium-containing waste water and improper disposal of waste residues in industrial sites may lead to the vertical migration of metals into aquifers, posing serious threat to soil-groundwater system. The heterogeneity in soil profile further aggravates the complexity and unpredictability of this transport process. Regional and vertical differences in soil properties led to the specificity in Cr migration behaviors among these three sites. Soil pH and Fe content were found to be the major controlling factors for the migration and transformation of Cr(VI) in aquifers. The conclusions of this study can provide scientific theoretical guidance for heavy metal pollution prevention and control in industrial contaminated regions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Basant Yadav, Pankaj Kumar Gupta, Nitesh Patidar, Sushil Kumar Himanshu
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)
Article
Green & Sustainable Science & Technology
Shreejita Basu, Brijesh Kumar Yadav, Shashi Mathur, Pankaj Kumar Gupta
CLEAN-SOIL AIR WATER
(2020)
Article
Engineering, Environmental
Pankaj Kumar Gupta, Brijesh Kumar Yadav
JOURNAL OF ENVIRONMENTAL ENGINEERING
(2020)
Review
Engineering, Environmental
Pankaj Kumar Gupta
JOURNAL OF ENVIRONMENTAL ENGINEERING
(2020)
Article
Environmental Sciences
Pankaj Kumar Gupta, Behrad Gharedaghloo, Michael Lynch, Jiujun Cheng, Maria Strack, Trevor C. Charles, Jonathan S. Price
ENVIRONMENTAL RESEARCH
(2020)
Article
Engineering, Environmental
Pankaj Kumar Gupta, Basant Yadav, Brijesh Kumar Yadav, Svetlana Sushkova, Shreejita Basu
Summary: This study utilizes an integrated experimental-numerical approach to investigate bioremediation of toluene-contaminated land with varying moisture and temperature levels. The research first conducts laboratory experiments to determine biodegradation rates under different conditions, and then develops an engineered bioremediation approach for polluted subsurface sites. The findings show that biodegradation rates are higher at higher temperatures and near field capacity moisture levels, while they are significantly reduced at lower temperatures and lower moisture content levels.
JOURNAL OF ENVIRONMENTAL ENGINEERING
(2021)
Review
Environmental Sciences
Monika Mahajan, Pankaj Kumar Gupta, Anita Singh, Barkha Vaish, Pooja Singh, Richa Kothari, Rajeev Pratap Singh
Summary: This review focuses on the chemistry, occurrence, and health implications of cadmium in groundwater. The study finds that the mobility of cadmium is influenced by various factors. High concentrations of cadmium have been reported in certain regions, and remediation techniques such as nanoparticles and phytoextraction can be cost-effective solutions to address cadmium pollution in groundwater.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Review
Environmental Sciences
Rakesh Kumar, Prabhakar Sharma, Anurag Verma, Prakash Kumar Jha, Prabhakar Singh, Pankaj Kumar Gupta, Ravish Chandra, P. V. Vara Prasad
Summary: Microplastic disposal into riverine ecosystems is a significant ecological hazard originating from land-based sources. This paper provides a detailed review of the physical processes involved in microplastic transport, highlighting the impact of physical characteristics and hydrodynamics on the distribution of microplastics in river ecosystems. The study also emphasizes the importance of empirical transport models in explaining the vertical and horizontal transport of microplastics in rivers.
Article
Engineering, Chemical
Rakesh Kumar, Rama Sinha, Pushpa Kumari Sharma, Nishita Ivy, Pawan Kumar, Nishi Kant, Aprajita Jha, Prakash Kumar Jha, Pankaj Kumar Gupta, Prabhakar Sharma, Rakesh Kumar Singh, Rajeev Pratap Singh, Ashok Ghosh, P. V. Vara Prasad
Summary: This article discusses the biological processes of fluoride remediation, including plant and microbial remediation systems, as well as the potential application of microbial bioremediation in fluoride ion removal.
Review
Chemistry, Multidisciplinary
Ali Mohd Yatoo, Md. Niamat Ali, Zarka Zaheen, Zahoor Ahmad Baba, Shafat Ali, Saiema Rasool, Tahir Ahmad Sheikh, Mika Sillanpaa, Pankaj Kumar Gupta, Burhan Hamid, Basharat Hamid
Summary: Pesticides have adverse effects on soil quality and biodiversity, particularly harming earthworms. This review examines the acute and sub-lethal effects of pesticides on earthworms, and discusses the importance of using these effects as biomarkers to assess the risk for non-target organisms.
ENVIRONMENTAL CHEMISTRY LETTERS
(2022)
Article
Agronomy
Manish Kumar, Milap Dashora, Rajesh Kumar, Swatantra Kumar Dubey, Pankaj Kumar Gupta, Alok Kumar
Summary: This study investigates the grain size distribution of the playa lakes in the Thar Desert, India, and finds that they mainly contain aeolian sediment. By evaluating environmentally sensitive grain size subpopulations, the sources and dynamics of sediment deposition in these lakes were identified. Statistical analysis was used to determine the sediment grain size distribution.
Review
Green & Sustainable Science & Technology
Abhay Guleria, Pankaj Kumar Gupta, Sumedha Chakma, Brijesh Kumar Yadav
Summary: Dense nonaqueous phase liquid (DNAPL) beyond the permissible limit in the subsurface environment threatens human health and ecological services. Accurate prediction of DNAPL concentration and mass fluxes can be achieved using robust fate and transport mathematical models. This study evaluated 412 articles published from 1990 to 2022 to provide an overview of DNAPL transport research trends, particularly fate and transport models, through bibliometric analysis. Major findings discussed include the influence of study scale and modeling framework, relationships of governing parameters, and recent developments in mathematical models. The USA and Canada were identified as leading countries in DNAPL fate and transport research.
Article
Engineering, Civil
Abhay Guleria, Pankaj Gupta, Sumedha Chakma, Brijesh Kumar Yadav
Summary: This study proposes a temporal moment-based approach to investigate the effectiveness of groundwater table manipulations for recovering dissolved-phase byproducts of light non-aqueous phase liquid (LNAPL) from the subsurface system. The analysis reveals that high dissolved-phase hydrocarbon recovery can be achieved by manipulating groundwater table conditions.
AQUA-WATER INFRASTRUCTURE ECOSYSTEMS AND SOCIETY
(2023)
Review
Biotechnology & Applied Microbiology
Pankaj Kumar Gupta, Manvi Gandhi
Summary: Soil-water pollution is a grave global concern, and it is crucial to take action to ensure a safe and healthy subsurface environment. Organic pollutants cause serious soil-water pollution and toxicity, making it urgent to remove them through biological processes for environmental and public health protection. Bioremediation, as an ecofriendly technology, can effectively address soil-water pollution caused by hydrocarbons, promoting sustainable development by using microorganisms, plants, or enzyme-driven processes to degrade and detoxify pollutants. This paper provides updates on recently developed bioremediation and phytoremediation techniques demonstrated at the plot-scale, with a focus on wetland-based treatment of BTEX contaminated soils and water. The knowledge acquired from this study significantly contributes to understanding the impact of dynamic subsurface conditions on engineered bioremediation techniques.
Article
Water Resources
Pankaj Kumar Gupta, Binita Kumari, Saurabh Kumar Gupta, Deepak Kumar
SUSTAINABLE WATER RESOURCES MANAGEMENT
(2020)