Pub Date : 2025-10-20DOI: 10.1016/j.enmm.2025.101102
Ever Estrada-Cabrera , Alejandra Castro-Carranza , Jairo C. Nolasco , Jürgen Gutowski , Cynthia Armendariz-Arnez
At present, environmental damage caused by the production and use of hazardous and toxic agrochemicals remains a global concern. These compounds have contributed to the contamination of water, soil, and air worldwide. Their chronic impacts on the environment and human health are still not fully understood and are often difficult to quantify. Accordingly, it is essential to identify and quantify these phytosanitary products in the environment to reduce their occurrence and mitigate cumulative effects. A viable option for their adsorption and detection can be achieved using natural and sustainable raw materials, such as zeolites. In particular, natural zeolites are promising nanostructures for use in functional and sustainable detectors, and they may serve as low-cost adsorbent materials for hazardous agrochemical monitoring. This review compiles reported applications of natural, synthetic, and composite zeolites to improve the understanding of their potential for adsorption, and thus, detection of hazardous pesticides. Information is provided on their characteristics, and factors defining its adsorption properties with the main objective of evaluating their reliability for the development of sustainable electronic sensors. The reported sensor devices developed with natural zeolites, and their detection mechanisms are discussed.
{"title":"Zeolites for use in environmentally sustainable sensors for hazardous pesticides: A review on reliability and potential perspectives in nanotechnology","authors":"Ever Estrada-Cabrera , Alejandra Castro-Carranza , Jairo C. Nolasco , Jürgen Gutowski , Cynthia Armendariz-Arnez","doi":"10.1016/j.enmm.2025.101102","DOIUrl":"10.1016/j.enmm.2025.101102","url":null,"abstract":"<div><div>At present, environmental damage caused by the production and use of hazardous and toxic agrochemicals remains a global concern. These compounds have contributed to the contamination of water, soil, and air worldwide. Their chronic impacts on the environment and human health are still not fully understood and are often difficult to quantify. Accordingly, it is essential to identify and quantify these phytosanitary products in the environment to reduce their occurrence and mitigate cumulative effects. A viable option for their adsorption and detection can be achieved using natural and sustainable raw materials, such as zeolites. In particular, natural zeolites are promising nanostructures for use in functional and sustainable detectors, and they may serve as low-cost adsorbent materials for hazardous agrochemical monitoring. This review compiles reported applications of natural, synthetic, and composite zeolites to improve the understanding of their potential for adsorption, and thus, detection of hazardous pesticides. Information is provided on their characteristics, and factors defining its adsorption properties with the main objective of evaluating their reliability for the development of sustainable electronic sensors. The reported sensor devices developed with natural zeolites, and their detection mechanisms are discussed.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"24 ","pages":"Article 101102"},"PeriodicalIF":0.0,"publicationDate":"2025-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145358111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Polypropylene (PP) is widely used for food and beverage storage, yet its propensity to release microplastics (MPs) and nanoplastics (NPs) under routine use conditions remains poorly understood. Here, we investigate MP/NP release from PP infant feeding bottles and water bottles under controlled thermal and mechanical stresses. Using Raman spectroscopy, FE-SEM, high-resolution TEM, and AFM, we identified particles down to ∼ 60 nm, extending the detectable size range beyond most previous studies. Release rates correlated strongly with temperature and frequency of use, ranging from 3.9 × 106 to 10.3 × 106 L-1 for baby bottles and 5.3 × 106 to 9.1 × 106 L-1 for water bottles respectively. Particles were predominantly flake-like and irregular, with crystalline–amorphous transitions and multilayer breakdown observed. Baby bottles released more MPs under thermal stress, whereas surface and mechanical stresses predominated in water bottles. These results provide new mechanistic insights into PP degradation pathways and highlight the importance of advanced, multi-modal analytical approaches for future evaluation of nanoscale plastic release.
{"title":"Understanding the multiple characteristics of microplastics generated from polypropylene bottles","authors":"Rumana Hossain, Ayub Ali, Montajar Sarkar, Veena Sahajwalla","doi":"10.1016/j.enmm.2025.101103","DOIUrl":"10.1016/j.enmm.2025.101103","url":null,"abstract":"<div><div>Polypropylene (PP) is widely used for food and beverage storage, yet its propensity to release microplastics (MPs) and nanoplastics (NPs) under routine use conditions remains poorly understood. Here, we investigate MP/NP release from PP infant feeding bottles and water bottles under controlled thermal and mechanical stresses. Using Raman spectroscopy, FE-SEM, high-resolution TEM, and AFM, we identified particles down to ∼ 60 nm, extending the detectable size range beyond most previous studies. Release rates correlated strongly with temperature and frequency of use, ranging from 3.9 × 10<sup>6</sup> to 10.3 × 10<sup>6</sup> L<sup>-1</sup> for baby bottles and 5.3 × 10<sup>6</sup> to 9.1 × 10<sup>6</sup> L<sup>-1</sup> for water bottles respectively. Particles were predominantly flake-like and irregular, with crystalline–amorphous transitions and multilayer breakdown observed. Baby bottles released more MPs under thermal stress, whereas surface and mechanical stresses predominated in water bottles. These results provide new mechanistic insights into PP degradation pathways and highlight the importance of advanced, multi-modal analytical approaches for future evaluation of nanoscale plastic release.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"24 ","pages":"Article 101103"},"PeriodicalIF":0.0,"publicationDate":"2025-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145358112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-09-25DOI: 10.1016/j.enmm.2025.101101
Mosaab A. Elbager , Mohammad Al-Suwaiyan , Qusai M. Karrar , Mohammed A.A. Elgzoly , Maimuna U. Zarewa , Tawfik A. Saleh
This study introduces a novel adsorbent material green carbon fibers (GCF) synthesized from palm waste leaves for sustainable wastewater treatment, leveraging their high porosity, thermal stability, and surface functionality for effective lead (Pb2+) removal from aqueous media. The uniqueness of the material lies in its origin from agricultural waste and its retention of natural fibrous morphology and hierarchical pore structures, distinguishing it from conventional activated carbons. Experimental conditions included pH 5.5, temperatures (10–40) °C, adsorbent doses (25–75) mg, and lead ion concentrations (50–100) mg/L. Characterization using SEM, EDS, XRD, TGA, BET, FTIR, and zeta potential analyses confirmed a highly porous GCF structure and favorable surface chemistry. Adsorption kinetics followed a pseudo-second-order (PSO) model (R2 = 0.952), indicating chemisorption, with a maximum capacity of 74.961 mg/g. Freundlich isotherm modeling (R2 = 0.9646) suggested heterogeneous multilayer adsorption. The RSM model demonstrated high predictive reliability with Reduced 2FI model (R2 = 0.9652) and among machine learning models, the Decision Tree outperformed others with R2 = 0.9143 and MSE = 76.88, identifying adsorbent weight as the most critical factor. These findings highlight the viability of converting agricultural waste into high-performance adsorbents, offering an eco-friendly and cost-effective solution for heavy metal remediation in wastewater.
{"title":"Efficient eco-friendly porous green carbon fiber derived from palm waste leaves for lead removal from wastewater: RSM, and advanced modeling of machine learning","authors":"Mosaab A. Elbager , Mohammad Al-Suwaiyan , Qusai M. Karrar , Mohammed A.A. Elgzoly , Maimuna U. Zarewa , Tawfik A. Saleh","doi":"10.1016/j.enmm.2025.101101","DOIUrl":"10.1016/j.enmm.2025.101101","url":null,"abstract":"<div><div>This study introduces a novel adsorbent material green carbon fibers (GCF) synthesized from palm waste leaves for sustainable wastewater treatment, leveraging their high porosity, thermal stability, and surface functionality for effective lead (Pb<sup>2+</sup>) removal from aqueous media. The uniqueness of the material lies in its origin from agricultural waste and its retention of natural fibrous morphology and hierarchical pore structures, distinguishing it from conventional activated carbons. Experimental conditions included pH 5.5, temperatures (10–40) °C, adsorbent doses (25–75) mg, and lead ion concentrations (50–100) mg/L. Characterization using SEM, EDS, XRD, TGA, BET, FTIR, and zeta potential analyses confirmed a highly porous GCF structure and favorable surface chemistry. Adsorption kinetics followed a pseudo-second-order (PSO) model (R<sup>2</sup> = 0.952), indicating chemisorption, with a maximum capacity of 74.961 mg/g. Freundlich isotherm modeling (R<sup>2</sup> = 0.9646) suggested heterogeneous multilayer adsorption. The RSM model demonstrated high predictive reliability with Reduced 2FI model (R<sup>2</sup> = 0.9652) and among machine learning models, the Decision Tree outperformed others with R<sup>2</sup> = 0.9143 and MSE = 76.88, identifying adsorbent weight as the most critical factor. These findings highlight the viability of converting agricultural waste into high-performance adsorbents, offering an eco-friendly and cost-effective solution for heavy metal remediation in wastewater.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"24 ","pages":"Article 101101"},"PeriodicalIF":0.0,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145332745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-09-14DOI: 10.1016/j.enmm.2025.101100
Jamila Husain Kagdi , Vaibhavkumar N. Mehta , Sanjay Jha , Tae Jung Park , Suresh Kumar Kailasa
Excessive use of pesticides and heavy metals can pose serious risks to human health and ecological balance. These pollutants persist in soil and water and bioaccumulate in organisms, leading to metabolic disruption and environmental damage. In this situation, simple, quick and inexpensive sensing platforms are essentially required to assay both pesticide residues and metal ions in environmental samples at the same time. This work represents the development of a dual-responsive colorimetric sensing probe for the detection of thiram using silver nanoparticles (AgNPs) modified with 2-mercapto-nicotinic acid (2-MNA) (AgNPs@2-MNA) and further AgNPs@2-MNA-thriam nanoaggregates were used for parallel detection Fe3+ and Cu2+ ion, respectively. The characteristic surface plasmon resonance (SPR) of AgNPs@2-MNA was remarkably shifted upon the addition of thiram, thereby forming AgNPs@2-MNA-thiram nanoaggregates, which was further used for the detection of Fe3+ and Cu2+ ions via complex-assisted sensing mechanism. The assay came out with good linear ranges and the lower limits of detection as calculated for thiram, Fe3+ and Cu2+ are 0.474, 0.411 and 0.487 µM, respectively. This colorimetric assay was successfully validated for the detection of thiram and two metal ions (Fe3+ and Cu2+) in real environmental samples, highlighting its potential for field-deployable environmental monitoring.
{"title":"Synthesis of 2-mercaptonicotinic acid capped silver nanoparticles for sensing of thiram and their nanoaggregates for detection of Fe3+ and Cu2+ ions","authors":"Jamila Husain Kagdi , Vaibhavkumar N. Mehta , Sanjay Jha , Tae Jung Park , Suresh Kumar Kailasa","doi":"10.1016/j.enmm.2025.101100","DOIUrl":"10.1016/j.enmm.2025.101100","url":null,"abstract":"<div><div>Excessive use of pesticides and heavy metals can pose serious risks to human health and ecological balance. These pollutants persist in soil and water and bioaccumulate in organisms, leading to metabolic disruption and environmental damage. In this situation, simple, quick and inexpensive sensing platforms are essentially required to assay both pesticide residues and metal ions in environmental samples at the same time. This work represents the development of a dual-responsive colorimetric sensing probe for the detection of thiram using silver nanoparticles (AgNPs) modified with 2-mercapto-nicotinic acid (2-MNA) (AgNPs@2-MNA) and further AgNPs@2-MNA-thriam nanoaggregates were used for parallel detection Fe<sup>3+</sup> and Cu<sup>2+</sup> ion, respectively. The characteristic surface plasmon resonance (SPR) of AgNPs@2-MNA was remarkably shifted upon the addition of thiram, thereby forming AgNPs@2-MNA-thiram nanoaggregates, which was further used for the detection of Fe<sup>3+</sup> and Cu<sup>2+</sup> ions via complex-assisted sensing mechanism. The assay came out with good linear ranges and the lower limits of detection as calculated for thiram, Fe<sup>3+</sup> and Cu<sup>2+</sup> are 0.474, 0.411 and 0.487 µM, respectively. This colorimetric assay was successfully validated for the detection of thiram and two metal ions (Fe<sup>3+</sup> and Cu<sup>2+</sup>) in real environmental samples, highlighting its potential for field-deployable environmental monitoring.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"24 ","pages":"Article 101100"},"PeriodicalIF":0.0,"publicationDate":"2025-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145104872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The occurrence, sources, and spatial distribution of phthalate esters (PAEs), polycyclic aromatic hydrocarbons (PAHs), and faecal stanols were simultaneously investigated in surface sediments from Manasbal Lake, NW Himalayas. The concentrations of Σ4PAEs ranged from 9.08 μg/g to 194.42 μg/g, while Σ16PAHs varied from non-detectable (n.d.) to 250.1 μg/g. Sewage markers such as coprostanol and epi-coprostanol were detected, with concentrations ranging from 0.05 to 0.4 µg/g (mean = 0.17 µg/g) and 0.05 to 1.18 µg/g (mean = 0.26 µg/g), respectively, indicating significant faecal pollution. Detected PAEs included diethyl phthalate, di-isobutyl phthalate, dibutyl phthalate isomers, and di(2-ethylhexyl) phthalate. The primary sources of PAEs in the sediments were domestic waste from nearby villages, garbage disposal from residential areas, and built-up regions. Three-factor modeling using positive matrix factorization identified fuel combustion as the most significant source of PAHs, contributing 40.4 % of the pollution, followed by biomass combustion, which accounted for approximately 33.1 %. The highest concentrations of Σ16PAEs, Σ4PAEs, and stanols compounds were observed in the eastern part near the inlet, suggesting that their distribution is strongly influenced by proximity to pollution sources. Conversely, there was no significant relationship between these organic contaminants and sediment characteristics (grain size and TOC content) or water depth. The significant correlation between Σ4PAEs and microplastic abundance indicates that PAEs can serve as effective markers for identifying plastic pollution in sediments. This study enhances the baseline characterization of emerging contaminants in Himalayan freshwater systems and contributes to a better understanding of the potential sources and controls on their distribution in aquatic systems globally.
{"title":"Occurrence, sources, and controlling factors of emerging organic pollutants in a freshwater lake system in the NW Himalayas","authors":"Sunil Kumar , Mehta Bulbul , Diptimayee Behera , Arshid Jehangir , Ambili Anoop","doi":"10.1016/j.enmm.2025.101099","DOIUrl":"10.1016/j.enmm.2025.101099","url":null,"abstract":"<div><div>The occurrence, sources, and spatial distribution of phthalate esters (PAEs), polycyclic aromatic hydrocarbons (PAHs), and faecal stanols were simultaneously investigated in surface sediments from Manasbal Lake, NW Himalayas. The concentrations of Σ<sub>4</sub>PAEs ranged from 9.08 μg/g to 194.42 μg/g, while Σ<sub>16</sub>PAHs varied from non-detectable (n.d.) to 250.1 μg/g. Sewage markers such as coprostanol and epi-coprostanol were detected, with concentrations ranging from 0.05 to 0.4 µg/g (mean = 0.17 µg/g) and 0.05 to 1.18 µg/g (mean = 0.26 µg/g), respectively, indicating significant faecal pollution. Detected PAEs included diethyl phthalate, di-isobutyl phthalate, dibutyl phthalate isomers, and di(2-ethylhexyl) phthalate. The primary sources of PAEs in the sediments were domestic waste from nearby villages, garbage disposal from residential areas, and built-up regions. Three-factor modeling using positive matrix factorization identified fuel combustion as the most significant source of PAHs, contributing 40.4 % of the pollution, followed by biomass combustion, which accounted for approximately 33.1 %. The highest concentrations of Σ<sub>16</sub>PAEs, Σ<sub>4</sub>PAEs, and stanols compounds were observed in the eastern part near the inlet, suggesting that their distribution is strongly influenced by proximity to pollution sources. Conversely, there was no significant relationship between these organic contaminants and sediment characteristics (grain size and TOC content) or water depth. The significant correlation between Σ<sub>4</sub>PAEs and microplastic abundance indicates that PAEs can serve as effective markers for identifying plastic pollution in sediments. This study enhances the baseline characterization of emerging contaminants in Himalayan freshwater systems and contributes to a better understanding of the potential sources and controls on their distribution in aquatic systems globally.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"24 ","pages":"Article 101099"},"PeriodicalIF":0.0,"publicationDate":"2025-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145117852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Natural clay (NC) from Makabaye (Far North Cameroon) was pre-treated according to the stocks method and the resulting powder was subjected to acid treatment (HCl at 0.5 M) to obtain acidified clay (AC) material. These materials (NC and AC) were subjected to morphological and structural characterization and then to successive adsorption (in batch mode) and desorption studies for hexavalent chromium until AC lost its adsorptive properties. These analyses showed the exfoliation of the clay after acidification. The influence of experimental parameters such as the variation in contact time, the mass of adsorbent, the pH of the solutions, the initial concentration of Cr (VI) ions were studied showed that each of the parameters influences the adsorption process. The results showed that adsorption equilibrium was reached after 20 min with both adsorbents. The optimum quantities of Cr (VI) ions adsorbed by the adsorbent were obtained for masses of 0.100 g. Maximum adsorption of Cr (VI) ions was obtained at pH = 3 with both adsorbents. This work also showed that by keeping the optimum parameters fixed, the quantity of chromium ions adsorbed increased significantly before stabilising at 15 mg/L with the two clay samples. Under these same optimum conditions, the maximum quantity adsorbed was obtained with the acidified clay and the natural clay, i.e. 29.41 mg/g and 27.78 mg/g respectively. The application of adsorption isotherms has shown that the Langmuir model (R2 = 0.980 with AC and R2 = 0.971 with NC) and Dubinin-Radushkevich model (R2 = 0.917 with AC and R2 = 0.991 with NC) better describes the adsorption mechanism of Cr (VI) ions than those of Freundlich and Temkin model. The kinetic study has shown that the pseudo-second order equation satisfactorily describes the adsorption mechanism (R2 = 0.998 with AC and R2 = 0.995 with NC). The thermodynamic study showed that the adsorption of Cr (VI) on the two adsorbents is spontaneous, exothermic with NC and endothermic with AC. The desorption study showed that the adsorbent (AC) could be regenerated to 98.32 % after 70 min under agitation at 150 rpm for a concentration of 1.5 M EDTA. The reused adsorbent showed desorption percentages ranging from 98.88 % (after the 1st recycling) to 85.56 % (after the 6th recycling). A very rapid decrease in the desorption of chromium by AC was observed from the 7th cycle of reuse (57.68 %) until the complete loss of this desorption at the 10th cycle (0.12 %).
{"title":"Sorption of hexavalent chromium ion onto natural swelling clay and acidified clay as a nano adsorbent: Kinetic and thermodynamic study","authors":"Niraka Blaise , Aguiza Abai Emmanuel , Mohamed Oubaouz , El Mostafa Erradi , Cherrat Ayoub , Kofa Guillaume Patrice , Ndi Koungou Sylvère , Hambate Gomdje Valery , Abdelilah Chtaini","doi":"10.1016/j.enmm.2025.101098","DOIUrl":"10.1016/j.enmm.2025.101098","url":null,"abstract":"<div><div>Natural clay (NC) from Makabaye (Far North Cameroon) was pre-treated according to the stocks method and the resulting powder was subjected to acid treatment (HCl at 0.5 M) to obtain acidified clay (AC) material. These materials (NC and AC) were subjected to morphological and structural characterization and then to successive adsorption (in batch mode) and desorption studies for hexavalent chromium until AC lost its adsorptive properties. These analyses showed the exfoliation of the clay after acidification. The influence of experimental parameters such as the variation in contact time, the mass of adsorbent, the pH of the solutions, the initial concentration of Cr (VI) ions were studied showed that each of the parameters influences the adsorption process. The results showed that adsorption equilibrium was reached after 20 min with both adsorbents. The optimum quantities of Cr (VI) ions adsorbed by the adsorbent were obtained for masses of 0.100 g. Maximum adsorption of Cr (VI) ions was obtained at pH = 3 with both adsorbents. This work also showed that by keeping the optimum parameters fixed, the quantity of chromium ions adsorbed increased significantly before stabilising at 15 mg/L with the two clay samples. Under these same optimum conditions, the maximum quantity adsorbed was obtained with the acidified clay and the natural clay, i.e. 29.41 mg/g and 27.78 mg/g respectively. The application of adsorption isotherms has shown that the Langmuir model (R<sup>2</sup> = 0.980 with AC and R<sup>2</sup> = 0.971 with NC) and Dubinin-Radushkevich model (R<sup>2</sup> = 0.917 with AC and R<sup>2</sup> = 0.991 with NC) better describes the adsorption mechanism of Cr (VI) ions than those of Freundlich and Temkin model. The kinetic study has shown that the pseudo-second order equation satisfactorily describes the adsorption mechanism (R<sup>2</sup> = 0.998 with AC and R<sup>2</sup> = 0.995 with NC). The thermodynamic study showed that the adsorption of Cr (VI) on the two adsorbents is spontaneous, exothermic with NC and endothermic with AC. The desorption study showed that the adsorbent (AC) could be regenerated to 98.32 % after 70 min under agitation at 150 rpm for a concentration of 1.5 M EDTA. The reused adsorbent showed desorption percentages ranging from 98.88 % (after the 1st recycling) to 85.56 % (after the 6th recycling). A very rapid decrease in the desorption of chromium by AC was observed from the 7th cycle of reuse (57.68 %) until the complete loss of this desorption at the 10th cycle (0.12 %).</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"24 ","pages":"Article 101098"},"PeriodicalIF":0.0,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145044373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-08-23DOI: 10.1016/j.enmm.2025.101096
Nina Doskocz, Katarzyna Affek, Monika Załęska-Radziwiłł
Nanoparticles (NPs) have raised global concerns due to their extensive use and detrimental impacts on ecosystems. While wastewater treatment plants (WWTPs) are viewed as potential sources of nanocompounds in the environment, the influence of aluminum oxide nanoparticles (Al2O3NPs) on wastewater treatment remains uncertain. This study aimed to explore the long-term effects of wastewater-borne Al2O3NPs and their bulk counterparts on the effectiveness of pollutant removal within sequencing batch reactors (SBRs), activated sludge performance, internal biological activity/viability, and microbial community diversity and structure. The presence of Al2O3NPs was observed to induce alterations in the removal efficiency of COD, N, and SOP from wastewater, as well as impacting the nitrification process during prolonged exposure. Al2O3NPs in wastewater accumulated in the sludge, affecting its morphology and diminishing microbial viability and biological activity. Additionally, high throughput sequencing of 16S rRNA indicated that Al2O3NPs could impact on the microbial richness and diversity of activated sludge in the SBR. In contrast, wastewater containing bulk counterparts did not negatively influence the capacity of wastewater treatment plants. This research provides novel and crucial insights into the effects of Al2O3NPs on the biological wastewater treatment process, holding significance for risk assessment procedures.
{"title":"Long-term effect of aluminum oxide nanoparticles on activated sludge performance in sequencing batch reactors","authors":"Nina Doskocz, Katarzyna Affek, Monika Załęska-Radziwiłł","doi":"10.1016/j.enmm.2025.101096","DOIUrl":"10.1016/j.enmm.2025.101096","url":null,"abstract":"<div><div>Nanoparticles (NPs) have raised global concerns due to their extensive use and detrimental impacts on ecosystems. While wastewater treatment plants (WWTPs) are viewed as potential sources of nanocompounds in the environment, the influence of aluminum oxide nanoparticles (Al<sub>2</sub>O<sub>3</sub>NPs) on wastewater treatment remains uncertain. This study aimed to explore the long-term effects of wastewater-borne Al<sub>2</sub>O<sub>3</sub>NPs and their bulk counterparts on the effectiveness of pollutant removal within sequencing batch reactors (SBRs), activated sludge performance, internal biological activity/viability, and microbial community diversity and structure. The presence of Al<sub>2</sub>O<sub>3</sub>NPs was observed to induce alterations in the removal efficiency of COD, <span><math><mrow><msubsup><mrow><mi>N</mi><mi>H</mi></mrow><mrow><mn>4</mn></mrow><mo>+</mo></msubsup><mo>-</mo></mrow></math></span> N, and SOP from wastewater, as well as impacting the nitrification process during prolonged exposure. Al<sub>2</sub>O<sub>3</sub>NPs in wastewater accumulated in the sludge, affecting its morphology and diminishing microbial viability and biological activity. Additionally, high throughput sequencing of 16S rRNA indicated that Al<sub>2</sub>O<sub>3</sub>NPs could impact on the microbial richness and diversity of activated sludge in the SBR. In contrast, wastewater containing bulk counterparts did not negatively influence the capacity of wastewater treatment plants. This research provides novel and crucial insights into the effects of Al<sub>2</sub>O<sub>3</sub>NPs on the biological wastewater treatment process, holding significance for risk assessment procedures.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"24 ","pages":"Article 101096"},"PeriodicalIF":0.0,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144908542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-08-23DOI: 10.1016/j.enmm.2025.101097
Samuel Pérez- Rodríguez , J. Tabla-Hernández , A.G. Hernández–Ramírez , S.B. Sujitha , M.P. Jonathan , Marco Moreno-Ibarra
The present study assessed the contamination of potentially toxic elements (Cd, Co, Cu, Fe, Mn, Ni, Pb, and Zn) in urban wastewaters from Mexico City, Mexico, using atomic absorption spectroscopy for risk assessment. A total of thirty-two water samples were systematically collected from the River de los Remedios (n = 17), River Tlalnepantla (n = 4), and River San Javier (n = 11) in the northern part of the metropolitan area. Results showed that average elemental concentrations, in mg L-1, followed the order: Mn (0.39) < Pb (0.17) < Fe (0.12) < Cu, Ni, Zn (0.06) < Co, Cd (0.02), reflecting the impact of raw industrial and domestic discharges from the highly urbanized region. Concentrations of Pb and Cd surpassed the legal limits of 0.03 and 0.004 mg L-1, respectively, for wastewater discharge. Statistical analysis of physicochemical parameters and element levels indicated that industrial activities are the main sources of PTEs. The level of pollution was assessed using the heavy metal evaluation index (HEI), contamination factor (CF), and Nemerow pollution index (NPI); results indicated moderate contamination by Pb and overall slight pollution. Human risk assessment calculated for the inhalation and dermal exposure pathways in adults and children indicated that Cd and Pb were the most critical elements that could pose adverse health effects to the local population. Dermal contact was identified as the potential exposure pathway that could pose potential risks to human health. The findings of this study indicate a deteriorating status of the aquatic system in Mexico City, primarily due to the persistent discharge of untreated wastewater, which poses a significant risk to environmental integrity and human health within the urban area.
{"title":"Distribution and risk assessment of potentially toxic elements in urban wastewaters of Mexico City","authors":"Samuel Pérez- Rodríguez , J. Tabla-Hernández , A.G. Hernández–Ramírez , S.B. Sujitha , M.P. Jonathan , Marco Moreno-Ibarra","doi":"10.1016/j.enmm.2025.101097","DOIUrl":"10.1016/j.enmm.2025.101097","url":null,"abstract":"<div><div>The present study assessed the contamination of potentially toxic elements (Cd, Co, Cu, Fe, Mn, Ni, Pb, and Zn) in urban wastewaters from Mexico City, Mexico, using atomic absorption spectroscopy for risk assessment. A total of thirty-two water samples were systematically collected from the River de los Remedios (n = 17), River Tlalnepantla (n = 4), and River San Javier (n = 11) in the northern part of the metropolitan area. Results showed that average elemental concentrations, in mg L<sup>-1</sup>, followed the order: Mn (0.39) < Pb (0.17) < Fe (0.12) < Cu, Ni, Zn (0.06) < Co, Cd (0.02), reflecting the impact of raw industrial and domestic discharges from the highly urbanized region. Concentrations of Pb and Cd surpassed the legal limits of 0.03 and 0.004 mg L<sup>-1</sup>, respectively, for wastewater discharge. Statistical analysis of physicochemical parameters and element levels indicated that industrial activities are the main sources of PTEs. The level of pollution was assessed using the heavy metal evaluation index (HEI), contamination factor (CF), and Nemerow pollution index (NPI); results indicated moderate contamination by Pb and overall slight pollution. Human risk assessment calculated for the inhalation and dermal exposure pathways in adults and children indicated that Cd and Pb were the most critical elements that could pose adverse health effects to the local population. Dermal contact was identified as the potential exposure pathway that could pose potential risks to human health. The findings of this study indicate a deteriorating status of the aquatic system in Mexico City, primarily due to the persistent discharge of untreated wastewater, which poses a significant risk to environmental integrity and human health within the urban area.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"24 ","pages":"Article 101097"},"PeriodicalIF":0.0,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144925371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-08-15DOI: 10.1016/j.enmm.2025.101093
Alka Rai , Amarpreet K. Bhatia , Sunitha B. Mathew , Sunita Sanwaria , Ajaya Kumar Singh , Ravin Jugade
Water contamination has attracted considerable attention due to its potentially devastating consequences on human health and the environment. Therefore, cutting-edge remediation technology development becomes a crucial environmental concern. A wide variety of techniques, such as adsorption, ion exchange, electrolysis, membrane process, reverse osmosis, and coagulation, have been used to remove hazardous heavy-metal-ions, organic contaminants, and dyes from water. Adsorptive confiscation of water toxicants based on functionalized polymers, biopolymers and metal organic frameworks is the key to wastewater treatment. Functionalization of these materials aim at three major objectives: (i) enhancing adsorption capacities of the material, (ii) improve selectivity towards desired pollutant, (iii) recyclability and reusability of material in multiple cycles. Recent literature has revealed that the cyclodextrin-derived nanocomposites have been identified as the most promising adsorbents for the removal of contaminants among the different conventional adsorbing materials. The structural and functional composition of cyclodextrin has shown a potential to meet all the three objectives making it a promising material in native form as well as modified forms for water detoxification. This article presents anup-to-date compilation of recent advances in the synthesis and study of adsorbents based on Cyclodextrin nanocomposites for the remediation of a wide range of contaminants. This review has been primarily focused onheavy-metal-ions, organic pollutants and dyes removal studies. Finally, this review may serve as a springboard for further study and provide insight into potential future developments and obstacles concerning Cyclodextrin nanocomposites in the role of adsorbents.
{"title":"Next-generation remediation tools: A review on cyclodextrin-based nanocomposites","authors":"Alka Rai , Amarpreet K. Bhatia , Sunitha B. Mathew , Sunita Sanwaria , Ajaya Kumar Singh , Ravin Jugade","doi":"10.1016/j.enmm.2025.101093","DOIUrl":"10.1016/j.enmm.2025.101093","url":null,"abstract":"<div><div>Water contamination has attracted considerable attention due to its potentially devastating consequences on human health and the environment. Therefore, cutting-edge remediation technology development becomes a crucial environmental concern. A wide variety of techniques, such as adsorption, ion exchange, electrolysis, membrane process, reverse osmosis, and coagulation, have been used to remove hazardous heavy-metal-ions, organic contaminants, and dyes from water. Adsorptive confiscation of water toxicants based on functionalized polymers, biopolymers and metal organic frameworks is the key to wastewater treatment. Functionalization of these materials aim at three major objectives: (i) enhancing adsorption capacities of the material, (ii) improve selectivity towards desired pollutant, (iii) recyclability and reusability of material in multiple cycles. Recent literature has revealed that the cyclodextrin-derived nanocomposites have been identified as the most promising adsorbents for the removal of contaminants among the different conventional adsorbing materials. The structural and functional composition of cyclodextrin has shown a potential to meet all the three objectives making it a promising material in native form as well as modified forms for water detoxification. This article presents anup-to-date compilation of recent advances in the synthesis and study of adsorbents based on Cyclodextrin nanocomposites for the remediation of a wide range of contaminants. This review has been primarily focused onheavy-metal-ions, organic pollutants and dyes removal studies. Finally, this review may serve as a springboard for further study and provide insight into potential future developments and obstacles concerning Cyclodextrin nanocomposites in the role of adsorbents.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"24 ","pages":"Article 101093"},"PeriodicalIF":0.0,"publicationDate":"2025-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144864410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-08-15DOI: 10.1016/j.enmm.2025.101095
Km Sapna , Vartika Sharma , Kamlendra Awasthi , Divesh N. Srivastava , Manoj Kumar , Vaibhav Kulshrestha
A facile and miniaturized Bi2O3/plastic chip electrode (PCE) was designed for concurrent electrochemical identification of Cd2+ and Pb2+. The identification was carried out through the potentiostatic electrodeposition of bismuth onto a PCE. The synthesized Bi2O3/PCE was analyzed employing scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) to assess their morphology, crystal structure, and elemental composition, respectively. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were performed to explore electrochemical characteristics of synthesized electrodes. Under optimal experimental conditions, Bi2O3/PCE demonstrated significant electro-catalytic performance for Cd2+ and Pb2+ at lower pH, with augmented square wave-anodic stripping peak currents compared to unmodified PCE. Bi2O3/PCE exhibits an exceptionally high sensitivity of 12 μA L cm−2 μg−1 for Cd2+ and 20 μA L cm−2 μg−1 for Pb2+ with low detection limit of 0.09 μg L−1 for Cd2+ and 0.07 μg L−1 for Pb2+. The developed sensor shows highly reproducible and repeatable performance with an extensive linear range 0.2–––300 μg L−1 for Cd2+ and 0.1–––250 μg L−1 for Pb2+ and also exhibits good selectivity, even when accompanied by common interfering ions.
{"title":"Highly sensitive and selective detection of Cd2+ and Pb2+ in aqueous system using miniaturized Bi2O3/plastic chip electrode based electrochemical sensor","authors":"Km Sapna , Vartika Sharma , Kamlendra Awasthi , Divesh N. Srivastava , Manoj Kumar , Vaibhav Kulshrestha","doi":"10.1016/j.enmm.2025.101095","DOIUrl":"10.1016/j.enmm.2025.101095","url":null,"abstract":"<div><div>A facile and miniaturized Bi<sub>2</sub>O<sub>3</sub>/plastic chip electrode (PCE) was designed for concurrent electrochemical identification of Cd<sup>2+</sup> and Pb<sup>2+</sup>. The identification was carried out through the potentiostatic electrodeposition of bismuth onto a PCE. The synthesized Bi<sub>2</sub>O<sub>3</sub>/PCE was analyzed employing scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) to assess their morphology, crystal structure, and elemental composition, respectively. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were performed to explore electrochemical characteristics of synthesized electrodes. Under optimal experimental conditions, Bi<sub>2</sub>O<sub>3</sub>/PCE demonstrated significant electro-catalytic performance for Cd<sup>2+</sup> and Pb<sup>2+</sup> at lower pH, with augmented square wave-anodic stripping peak currents compared to unmodified PCE. Bi<sub>2</sub>O<sub>3</sub>/PCE exhibits an exceptionally high sensitivity of 12 μA L cm<sup>−2</sup> μg<sup>−1</sup> for Cd<sup>2+</sup> and 20 μA L cm<sup>−2</sup> μg<sup>−1</sup> for Pb<sup>2+</sup> with low detection limit of 0.09 μg L<sup>−1</sup> for Cd<sup>2+</sup> and 0.07 μg L<sup>−1</sup> for Pb<sup>2+</sup>. The developed sensor shows highly reproducible and repeatable performance with an extensive linear range 0.2–––300 μg L<sup>−1</sup> for Cd<sup>2+</sup> and 0.1–––250 μg L<sup>−1</sup> for Pb<sup>2+</sup> and also exhibits good selectivity, even when accompanied by common interfering ions.</div></div>","PeriodicalId":11716,"journal":{"name":"Environmental Nanotechnology, Monitoring and Management","volume":"24 ","pages":"Article 101095"},"PeriodicalIF":0.0,"publicationDate":"2025-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144886221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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