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Rostami MS, Khodaei MM, Benassi E. Surface modified of chitosan by TiO 2@MWCNT nanohybrid for the efficient removal of organic dyes and antibiotics. Int J Biol Macromol 2024; 274:133382. [PMID: 38914389 DOI: 10.1016/j.ijbiomac.2024.133382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Revised: 06/08/2024] [Accepted: 06/21/2024] [Indexed: 06/26/2024]
Abstract
Considering the increase in the discharge of industrial effluents containing dyes and antibiotic resistance as a consequence of increasing the prescription and easy distribution of antibiotic drugs at the global level, designing efficient, biodegradable and non-toxic absorbents is necessary to reduce environmental harm effects. Herein, we present a series of novel eco-friendly ternary hybrid nanocomposite hydrogels CS/TiO2@MWCNT (CTM) composed of chitosan (CS), TiO2, and multiwalled carbon nanotube (MWCNT) for removal of methylene blue (MB) and methyl orange (MO) and common antibiotic ciprofloxacin (CIP) in aqueous medium. The combination of MWCNT and TiO2 improves the physicochemical properties of CS hydrogel and increases the adsorption capacity toward pollutants in the presence of different loadings. CTM hydrogel showed a specific surface area of 236.45 m2 g-1 with a pore diameter of 7.89 nm. Adsorption mechanisms were investigated in detail using kinetic, isotherm, and thermodynamic studies of adsorption as well as various spectroscopic techniques. Adsorption of these pollutants by CTM nanocomposite hydrogel occurred using various interactions at different pHs, which showed the obvious dependence of CTM adsorption capacity on pH. Electrostatic attractions, complex formation, π-π stacking and hydrogen bonds played a key role in the adsorption process. The adsorption of MB, MO, and CIP was fitted with the Langmuir isotherm with maximum adsorption capacities of 531.91, 1763.6, and 1510.5 mg g-1, respectively. CTM had a minor decrease in adsorption strength and showed good structural stability even after 8 adsorptions-desorption cycles. The total cost of producing a 1 kg adsorbent was calculated to be $ 450, which helped us determine the economic feasibility of the adsorbent in large-scale applications.
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Affiliation(s)
| | - Mohammad Mehdi Khodaei
- Department of Organic Chemistry, Razi University, 67149-67346 Kermanshah, Iran; Nanoscience and Nanotechnology Research Center, Razi University, 67149-67346 Kermanshah, Iran.
| | - Enrico Benassi
- Novosibirsk State University, Novosibirsk 630090, Russia.
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2
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Jasechko S, Seybold H, Perrone D, Fan Y, Shamsudduha M, Taylor RG, Fallatah O, Kirchner JW. Rapid groundwater decline and some cases of recovery in aquifers globally. Nature 2024; 625:715-721. [PMID: 38267682 PMCID: PMC10808077 DOI: 10.1038/s41586-023-06879-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2023] [Accepted: 11/14/2023] [Indexed: 01/26/2024]
Abstract
Groundwater resources are vital to ecosystems and livelihoods. Excessive groundwater withdrawals can cause groundwater levels to decline1-10, resulting in seawater intrusion11, land subsidence12,13, streamflow depletion14-16 and wells running dry17. However, the global pace and prevalence of local groundwater declines are poorly constrained, because in situ groundwater levels have not been synthesized at the global scale. Here we analyse in situ groundwater-level trends for 170,000 monitoring wells and 1,693 aquifer systems in countries that encompass approximately 75% of global groundwater withdrawals18. We show that rapid groundwater-level declines (>0.5 m year-1) are widespread in the twenty-first century, especially in dry regions with extensive croplands. Critically, we also show that groundwater-level declines have accelerated over the past four decades in 30% of the world's regional aquifers. This widespread acceleration in groundwater-level deepening highlights an urgent need for more effective measures to address groundwater depletion. Our analysis also reveals specific cases in which depletion trends have reversed following policy changes, managed aquifer recharge and surface-water diversions, demonstrating the potential for depleted aquifer systems to recover.
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Affiliation(s)
- Scott Jasechko
- Bren School of Environmental Science & Management, University of California, Santa Barbara, Santa Barbara, CA, USA.
| | - Hansjörg Seybold
- Department of Environmental Systems Sciences, ETH Zürich, Zürich, Switzerland
| | - Debra Perrone
- Environmental Studies Program, University of California, Santa Barbara, Santa Barbara, CA, USA
| | - Ying Fan
- Department of Earth and Planetary Sciences, Rutgers University, New Brunswick, NJ, USA
| | - Mohammad Shamsudduha
- Institute for Risk and Disaster Reduction, University College London, London, UK
| | | | - Othman Fallatah
- Department of Nuclear Engineering, Faculty of Engineering, King Abdulaziz University, Jeddah, Saudi Arabia
- Center for Training and Radiation Protection, Faculty of Engineering, King Abdulaziz University, Jeddah, Saudi Arabia
| | - James W Kirchner
- Department of Environmental Systems Sciences, ETH Zürich, Zürich, Switzerland
- Swiss Federal Research Institute WSL, Birmensdorf, Switzerland
- Department of Earth and Planetary Science, University of California, Berkeley, Berkeley, CA, USA
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Ha QK, Kim K, Ko K, Phan NL, Phung TH. Mobilization of Heavy Metals in a Saline Confined Aquifer as a Consequence of Rainwater Injection: A Case Study in Southern Vietnam. ARCHIVES OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2023; 85:277-289. [PMID: 37477656 DOI: 10.1007/s00244-023-01016-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Accepted: 07/04/2023] [Indexed: 07/22/2023]
Abstract
An artificial recharge test was performed in Ho Chi Minh City, Vietnam to see the geochemical response of a saline coastal plain aquifer to the injected rainwater. The results show that the rainwater injection can cause mobilization of heavy metals due to pyrite oxidation and this phenomenon can persist even after the full recovery of the injected water. In this study, a 30-m-deep well was installed in a confined aquifer. Pyrite framboids were observed in the sediment samples collected during the well drilling. A total of 400 L rainwater was injected into the well for 70 min. After waiting 63 h, the well was extracted at a pump speed of 2.7 L/min and the chemistry of the pumped groundwater was monitored for 10 h. The groundwater showed geochemical features close to rainwater at the early stage of pumping and gradually changed to those of the background waters, especially, in electrical conductivity and Cl- concentration, as the pumping proceeded. However, the groundwater pumped in the later stage showed much increased concentrations in SO42-, total iron (FeT), AsT, Ni, Mn and Zn relative to the calculated mixing concentrations due to pyrite oxidation even though NO3-, the pyrite oxidant, already had disappeared. It was revealed from the geochemical modeling that the persistent pyrite oxidation was the result of the reaction with ferrihydrite, which precipitated in pores of the sediment by the injection of aerated water. We believe our study is a good example showing the importance of careful design of the artificial recharge systems to avoid or minimize the geochemical disturbance of aquifer.
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Affiliation(s)
- Quang-Khai Ha
- Faculty of Environment and Natural Resources, Ho Chi Minh City University of Technology (HCMUT), 268, Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc City, Ho Chi Minh City, Vietnam
- Department of Environmental Engineering, Kunsan National University, Gunsan, Jeonbuk, 54150, Korea
| | - Kangjoo Kim
- Department of Environmental Engineering, Kunsan National University, Gunsan, Jeonbuk, 54150, Korea.
| | - Kyungseok Ko
- Korea Institute of Geoscience and Mineral Resources, Daejeon, 34132, Korea
| | - Nam Long Phan
- Department of Environmental Engineering, Kunsan National University, Gunsan, Jeonbuk, 54150, Korea
| | - Thanh-Huy Phung
- Department of Environmental Engineering, Kunsan National University, Gunsan, Jeonbuk, 54150, Korea
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Narvaez-Montoya C, Mahlknecht J, Torres-Martínez JA, Mora A, Bertrand G. Seawater intrusion pattern recognition supported by unsupervised learning: A systematic review and application. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 864:160933. [PMID: 36566863 DOI: 10.1016/j.scitotenv.2022.160933] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Revised: 12/10/2022] [Accepted: 12/11/2022] [Indexed: 06/17/2023]
Abstract
Seawater intrusion is among the world's leading causes of groundwater contamination, as salty water can affect potable water access, food production, and ecosystem functions. To explore such contamination sources, multivariate analysis supported by unsupervised learning tools has been used for decades to aid in water resource pattern recognition, clustering, and water quality data variability characterization. This study proposes a systematic review of these techniques applied for supporting seawater intrusion identification based on the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement and subsequent bibliometric analysis of 102 coastal hydrogeological studies. The most relevant identified methods, including principal components analysis (PCA), hierarchical clustering analysis, K-means clustering, and self-organizing maps, are explained and applied to a case study. Although 74 % of the studies that applied dimensional reduction methods, such as PCA, associated most of the database variance with the salinization process, 77 % of the studies that applied clustering methods associated at least one water sample cluster with the influence of seawater intrusion. Based on the review and a practical demonstration using the open-source R software platform, recommendations are made regarding data preprocessing, research opportunities, and publishing information necessary to replicate and validate the studies.
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Affiliation(s)
- Christian Narvaez-Montoya
- Tecnologico de Monterrey, Escuela de Ingenieria y Ciencias, Eugenio Garza Sada 2501, Monterrey 64849, Nuevo Leon, Mexico
| | - Jürgen Mahlknecht
- Tecnologico de Monterrey, Escuela de Ingenieria y Ciencias, Eugenio Garza Sada 2501, Monterrey 64849, Nuevo Leon, Mexico.
| | - Juan Antonio Torres-Martínez
- Tecnologico de Monterrey, Escuela de Ingenieria y Ciencias, Eugenio Garza Sada 2501, Monterrey 64849, Nuevo Leon, Mexico
| | - Abrahan Mora
- Tecnologico de Monterrey, Escuela de Ingenieria y Ciencias, Campus Puebla, Atlixcáyotl 5718, Reserva Territorial Atlixcáyotl, Puebla 72453, Mexico
| | - Guillaume Bertrand
- University of Bourgogne Franche-Comté, UMR UFC CNRS 6249 Chrono-Environnement, 16 route de Gray 25000 Besançon, 4 Place Tharradin, 25200 Montbéliard, France; Federal University of Paraiba, Department of Civil and Environmental Engineering, João Pessoa 58051-900, Brazil
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Urseler N, Bachetti R, Biolé F, Morgante V, Morgante C. Atrazine pollution in groundwater and raw bovine milk: Water quality, bioaccumulation and human risk assessment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 852:158498. [PMID: 36063942 DOI: 10.1016/j.scitotenv.2022.158498] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 08/16/2022] [Accepted: 08/30/2022] [Indexed: 06/15/2023]
Abstract
Atrazine herbicide can bioaccumulate over time and thus affect humans for generations to come. However, scarce studies have evaluated its bioaccumulation potential in bovine milk, a nutritional staple for children and the elderly both domestically and internationally. This study aimed to determine its concentration in groundwater and bovine milk, as well as the risks it is likely to pose for human health. Eighteen dairy farms in the Pampean plain of Argentina were analyzed. A strong correlation was found between the chemical composition and the geomorphological characteristics of the plain. In addition, increased salinity was observed in the groundwater at greater distances from the aquifer's recharge area. Atrazine was quantified in 50 % of the groundwater samples (at values ranging from 0.07 to 1.40 μg/L), and in 89 % of the bovine milk samples (from 2.51 to 20.97 μg/L). Moreover, atrazine levels in 44.4 % of the groundwater samples and 11.1 % of the bovine milk samples (n = 18) exceeded the limits internationally established as safe for human consumption. The hazard quotient (HQ) values of the compound were negligible for children and adults, both in groundwater (child = 9.7E-4, adult = 4.5E-4) and in milk (child = 1.0E-2, adult = 1.6E-3). The estimated cancer risk (CR) values need further evaluation (child = 7.8E-6, adult = 3.6E-6 in groundwater; child = 6.6E-5, adult = 1.3E-5 in milk). In both types of samples, the HQ and CR of residual atrazine were higher for children than for adults. Nevertheless, bioaccumulation factors suggest that dairy cows have a moderate capacity to incorporate atrazine from abiotic matrices. This is the first report on residual atrazine in bovine milk in Argentina. The results presented here indicate that the status of atrazine contamination in the area should continue to be monitored in order to assess its long-term impact on public health.
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Affiliation(s)
- Noelia Urseler
- Instituto Académico Pedagógico de Ciencias Básicas y Aplicadas (IAPCByA), Universidad Nacional de Villa María, Instituto Multidisciplinario de Investigación y Transferencia Agro-alimentaria y Biotecnológica, IMITAB-CONICET, Av. Arturo Jauretche 1555 (CP 5900), Villa María, Córdoba, Argentina.
| | - Romina Bachetti
- Instituto Académico Pedagógico de Ciencias Básicas y Aplicadas (IAPCByA), Universidad Nacional de Villa María, Instituto Multidisciplinario de Investigación y Transferencia Agro-alimentaria y Biotecnológica, IMITAB-CONICET, Av. Arturo Jauretche 1555 (CP 5900), Villa María, Córdoba, Argentina
| | - Fernanda Biolé
- Instituto Académico Pedagógico de Ciencias Básicas y Aplicadas (IAPCByA), Universidad Nacional de Villa María, Instituto Multidisciplinario de Investigación y Transferencia Agro-alimentaria y Biotecnológica, IMITAB-CONICET, Av. Arturo Jauretche 1555 (CP 5900), Villa María, Córdoba, Argentina
| | - Verónica Morgante
- Centro de Investigación en Recursos Naturales y Sustentabilidad (CIRENYS), Universidad Bernardo O'Higgins, Avenida Viel 1497, Santiago de Chile, Chile
| | - Carolina Morgante
- Instituto Académico Pedagógico de Ciencias Básicas y Aplicadas (IAPCByA), Universidad Nacional de Villa María, Instituto Multidisciplinario de Investigación y Transferencia Agro-alimentaria y Biotecnológica, IMITAB-CONICET, Av. Arturo Jauretche 1555 (CP 5900), Villa María, Córdoba, Argentina
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6
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Tu TA, Tweed S, Dan NP, Descloitres M, Quang KH, Nemery J, Nguyen A, Leblanc M, Baduel C. Localized recharge processes in the NE Mekong Delta and implications for groundwater quality. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 845:157118. [PMID: 35810893 DOI: 10.1016/j.scitotenv.2022.157118] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 06/09/2022] [Accepted: 06/28/2022] [Indexed: 06/15/2023]
Abstract
Understanding recharge in the Mekong Delta is critical for the delta's groundwater resources, and requires the investigation of recharge processes at the local scale. In this study of the north eastern area of the Mekong Delta, time-series of environmental tracer data (δ18O, δ2H, major ions and 3H) and markers of rural pollution (NH4 and NO3) were used to highlight localized recharge and impacts on groundwater quality. Results highlighted new hydrological insights into recharge processes, including that the Pleistocene aquifer receives recent recharge (< 60 years), predominantly during high rainfall months (> 100 mm/month). However, due to shallow clay layers there are significant spatial variations in these recharge processes, which were observed in the seasonal fluctuation of groundwater δ18O values in groundwater. Wet season δ18O changes ranged from below analytical uncertainty (≤ 0.10 ‰) to up to 0.56 ‰, and the calculated fraction of rainfall contribution to the aquifer is ≤5 % to 16 %. Rainfall recharge via the acrisol soils results in low groundwater EC (20-55 μS/cm), acidic groundwater (pH 3.6-5.6), and may also have resulted in the low groundwater NO3 concentrations (≤ 5.3 mg NO3/L) at many sites due to adsorption, therefore delaying not reducing NO3 contamination. Site specific variations in nitrogen processes includes increased NO3 (to 29.7 mg/L) from fertiliser transfers or nitrification, and increased NH4 (to 1.4 mg/L) likely due to the recharge of irrigation waters. Unlike other recharge areas across the northern Mekong Delta, this north-eastern region provides a groundwater resource unaffected by arsenic contamination. Therefore, these results should inform on priority areas for protection from further contamination by rural anthropogenic activities.
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Affiliation(s)
- T A Tu
- Centre Asiatique de Recherche sur l'Eau (CARE), Ho Chi Minh City University of Technology (HCMUT), Ho Chi Minh City 700000, Viet Nam; Vietnam National University-Ho Chi Minh City (VNU-HCM), Thu Duc City, Ho Chi Minh City, Viet Nam
| | - S Tweed
- Centre Asiatique de Recherche sur l'Eau (CARE), Ho Chi Minh City University of Technology (HCMUT), Ho Chi Minh City 700000, Viet Nam; UMR G-eau, IRD, SupAgro, Montpellier, France.
| | - N P Dan
- Centre Asiatique de Recherche sur l'Eau (CARE), Ho Chi Minh City University of Technology (HCMUT), Ho Chi Minh City 700000, Viet Nam; Vietnam National University-Ho Chi Minh City (VNU-HCM), Thu Duc City, Ho Chi Minh City, Viet Nam
| | - M Descloitres
- Centre Asiatique de Recherche sur l'Eau (CARE), Ho Chi Minh City University of Technology (HCMUT), Ho Chi Minh City 700000, Viet Nam; Université Grenoble Alpes, CNRS, IRD, Grenoble INP, IGE, Grenoble, France
| | - K H Quang
- Centre Asiatique de Recherche sur l'Eau (CARE), Ho Chi Minh City University of Technology (HCMUT), Ho Chi Minh City 700000, Viet Nam; Vietnam National University-Ho Chi Minh City (VNU-HCM), Thu Duc City, Ho Chi Minh City, Viet Nam
| | - J Nemery
- Centre Asiatique de Recherche sur l'Eau (CARE), Ho Chi Minh City University of Technology (HCMUT), Ho Chi Minh City 700000, Viet Nam; Université Grenoble Alpes, CNRS, IRD, Grenoble INP, IGE, Grenoble, France
| | - A Nguyen
- Centre Asiatique de Recherche sur l'Eau (CARE), Ho Chi Minh City University of Technology (HCMUT), Ho Chi Minh City 700000, Viet Nam; Université Grenoble Alpes, CNRS, IRD, Grenoble INP, IGE, Grenoble, France
| | - M Leblanc
- Centre Asiatique de Recherche sur l'Eau (CARE), Ho Chi Minh City University of Technology (HCMUT), Ho Chi Minh City 700000, Viet Nam; UMR EMMAH, Hydrogeology Laboratory, University of Avignon, France; IWRI (International Water Research Institute), UM6P-UM5, Morocco
| | - C Baduel
- Centre Asiatique de Recherche sur l'Eau (CARE), Ho Chi Minh City University of Technology (HCMUT), Ho Chi Minh City 700000, Viet Nam; Université Grenoble Alpes, CNRS, IRD, Grenoble INP, IGE, Grenoble, France
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