Pub Date : 2026-02-09DOI: 10.1080/10256016.2026.2615248
Ibrahim Ayodeji Bello, Abdullahi Muhammad Vatsa, Hameed Adavize Momoh, Taiwo Abadunmi, A A Bello
This study investigates radon concentrations in groundwater from 20 locations in Iluagba, Kogi State, Nigeria, analyzed using a liquid scintillation counter. Radon levels ranged from 10.6-43.1 Bq/L (average 24.1 Bq/L). Although below the World Health Organisation (WHO) limit of 100 Bq/L, about 90 % exceeded the United States Environmental Protection Agency (USEPA) advisory level of 11.1 Bq/L, indicating potential long-term health risks. The annual effective dose (AED) was highest in infants (up to 163.5 µSv/y), with seven samples exceeding the WHO reference dose of 100 µSv/y. Excess lifetime cancer risk (ELCR) values for all age groups surpassed the USEPA safety threshold (1.0 × 10-⁴), identifying infants as the most vulnerable group. Organ-specific analysis showed the lungs received substantially higher doses than the stomach, confirming inhalation as the primary exposure route. While strong correlations (r ≈ 1.0) validated internal data consistency, the elevated radiological risk remains the key concern. Compared with other Nigerian regions, Iluagba exhibits moderate to high exposure levels. These findings underscore the need for targeted radon mitigation, community education, and routine groundwater monitoring to safeguard public health in Kogi State.
{"title":"Health risk assessment of radon exposure through drinking water in Iluagba, Kogi State, Nigeria.","authors":"Ibrahim Ayodeji Bello, Abdullahi Muhammad Vatsa, Hameed Adavize Momoh, Taiwo Abadunmi, A A Bello","doi":"10.1080/10256016.2026.2615248","DOIUrl":"https://doi.org/10.1080/10256016.2026.2615248","url":null,"abstract":"<p><p>This study investigates radon concentrations in groundwater from 20 locations in Iluagba, Kogi State, Nigeria, analyzed using a liquid scintillation counter. Radon levels ranged from 10.6-43.1 Bq/L (average 24.1 Bq/L). Although below the World Health Organisation (WHO) limit of 100 Bq/L, about 90 % exceeded the United States Environmental Protection Agency (USEPA) advisory level of 11.1 Bq/L, indicating potential long-term health risks. The annual effective dose (AED) was highest in infants (up to 163.5 µSv/y), with seven samples exceeding the WHO reference dose of 100 µSv/y. Excess lifetime cancer risk (ELCR) values for all age groups surpassed the USEPA safety threshold (1.0 × 10<sup>-</sup>⁴), identifying infants as the most vulnerable group. Organ-specific analysis showed the lungs received substantially higher doses than the stomach, confirming inhalation as the primary exposure route. While strong correlations (<i>r</i> ≈ 1.0) validated internal data consistency, the elevated radiological risk remains the key concern. Compared with other Nigerian regions, Iluagba exhibits moderate to high exposure levels. These findings underscore the need for targeted radon mitigation, community education, and routine groundwater monitoring to safeguard public health in Kogi State.</p>","PeriodicalId":14597,"journal":{"name":"Isotopes in Environmental and Health Studies","volume":" ","pages":"1-13"},"PeriodicalIF":1.4,"publicationDate":"2026-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146142280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-09DOI: 10.1016/j.envpol.2026.127792
Yuzhi Lan, Tao You, Xiaoyan Feng, Jiajun Guo, Hengyi Xu
With growing toxicological research on microplastics (MPs), scientific attention has shifted from their single toxicity to their combined toxicity with other pollutants. Di(2-ethylhexyl) phthalate (DEHP), a common synthetic plasticizer, may co-occur with MPs through intrinsic association during production or through exogenous environmental pathways, posing the significant risk of co-exposure to organism. Oral exposure represents the primary route for MPs and DEHP, which traverse the gastrointestinal tract and target the enterohepatic system through direct intestinal interaction and systemic circulation. However, their combined toxicity, especially enterohepatic, remains poorly studied in the mammals. In this study, adult C57/BL6J mice were employed and exposed to polystyrene MPs (PS-MPs), DEHP or both for eight weeks. It was revealed that co-exposure to PS-MPs and DEHP induced more significant enterohepatic toxicity than the single exposures, involving enhanced enterohepatic inflammatory response and oxidative stress, as well as intestinal microbial disturbance. Furthermore, after fecal microbiota transplantation, the recipient mice developed similar trends of enterohepatic toxicity to those observed in the corresponding donor mice, revealing the key function played by intestinal microbiota. This study highlighted the crucial link of the gut-liver axis in the combined effects of PS-MPs and DEHP-induced enterohepatic toxicity in mammals and provided a mechanism insight of co-exposure to MPs and other environmental pollutants.
{"title":"Combined Enterohepatic Toxicity of Polystyrene Microplastics and Di(2-ethylhexyl) Phthalate in Mice: Gut Microbiota-Dependent Synergistic Effects","authors":"Yuzhi Lan, Tao You, Xiaoyan Feng, Jiajun Guo, Hengyi Xu","doi":"10.1016/j.envpol.2026.127792","DOIUrl":"https://doi.org/10.1016/j.envpol.2026.127792","url":null,"abstract":"With growing toxicological research on microplastics (MPs), scientific attention has shifted from their single toxicity to their combined toxicity with other pollutants. Di(2-ethylhexyl) phthalate (DEHP), a common synthetic plasticizer, may co-occur with MPs through intrinsic association during production or through exogenous environmental pathways, posing the significant risk of co-exposure to organism. Oral exposure represents the primary route for MPs and DEHP, which traverse the gastrointestinal tract and target the enterohepatic system through direct intestinal interaction and systemic circulation. However, their combined toxicity, especially enterohepatic, remains poorly studied in the mammals. In this study, adult C57/BL6J mice were employed and exposed to polystyrene MPs (PS-MPs), DEHP or both for eight weeks. It was revealed that co-exposure to PS-MPs and DEHP induced more significant enterohepatic toxicity than the single exposures, involving enhanced enterohepatic inflammatory response and oxidative stress, as well as intestinal microbial disturbance. Furthermore, after fecal microbiota transplantation, the recipient mice developed similar trends of enterohepatic toxicity to those observed in the corresponding donor mice, revealing the key function played by intestinal microbiota. This study highlighted the crucial link of the gut-liver axis in the combined effects of PS-MPs and DEHP-induced enterohepatic toxicity in mammals and provided a mechanism insight of co-exposure to MPs and other environmental pollutants.","PeriodicalId":311,"journal":{"name":"Environmental Pollution","volume":"51 1","pages":""},"PeriodicalIF":8.9,"publicationDate":"2026-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146146588","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-09DOI: 10.1016/j.marpolbul.2026.119385
I. Gede Hendrawan, Ade Riestiari Sudarmawan, Putra Bagus Panji Pamungkas, Pande Gde Sasmita Julyantoro, I. Wayan Gede Astawa Karang, Dwi Budi Wiyanto, I. Made Dharma Raharja, I. Putu Ranu Fajar Maharta, Cornelia Coraima Lazaren, Alex S.J. Wyatt
Plastic pollution remains a significant threat to coral reef ecosystems, even within Marine Protected Areas (MPAs). This study assesses the levels and types of plastic debris, both macroplastics and microplastics, found in coral reef ecosystems at two MPAs in Bali: Karangasem and Nusa Penida. Coral health was evaluated using the Underwater Photo Transect (UPT) method, while plastic particles were identified through field sampling and laboratory analysis, including Raman spectroscopy. Macroplastic accumulation was higher in Karangasem, while microplastic concentrations were comparable between the two regions. Microplastics were detected in coral tissues, and Polyethylene (PET and LDPE) was the dominant polymer. Although Pollution Load Index (PLI) values indicate a low ecological risk, it is evident that both MPAs suffer from coral degradation. Notably, the data suggest that macroplastic may have a more direct impact on coral reefs through physical damage. Despite these threats, both MPAs exhibited high ecological resilience, suggesting strong recovery potential if waste inputs are reduced. The findings highlight the important of improving waste management, especially capacity building and increased funding allocation. Strengthening each strategic approach of the MPAs can reduce plastic leakage into the sea and support coral reef recovery.
{"title":"Plastic threats to coral reefs: A strategic management perspective from Bali's marine protected areas","authors":"I. Gede Hendrawan, Ade Riestiari Sudarmawan, Putra Bagus Panji Pamungkas, Pande Gde Sasmita Julyantoro, I. Wayan Gede Astawa Karang, Dwi Budi Wiyanto, I. Made Dharma Raharja, I. Putu Ranu Fajar Maharta, Cornelia Coraima Lazaren, Alex S.J. Wyatt","doi":"10.1016/j.marpolbul.2026.119385","DOIUrl":"https://doi.org/10.1016/j.marpolbul.2026.119385","url":null,"abstract":"Plastic pollution remains a significant threat to coral reef ecosystems, even within Marine Protected Areas (MPAs). This study assesses the levels and types of plastic debris, both macroplastics and microplastics, found in coral reef ecosystems at two MPAs in Bali: Karangasem and Nusa Penida. Coral health was evaluated using the Underwater Photo Transect (UPT) method, while plastic particles were identified through field sampling and laboratory analysis, including Raman spectroscopy. Macroplastic accumulation was higher in Karangasem, while microplastic concentrations were comparable between the two regions. Microplastics were detected in coral tissues, and Polyethylene (PET and LDPE) was the dominant polymer. Although Pollution Load Index (PLI) values indicate a low ecological risk, it is evident that both MPAs suffer from coral degradation. Notably, the data suggest that macroplastic may have a more direct impact on coral reefs through physical damage. Despite these threats, both MPAs exhibited high ecological resilience, suggesting strong recovery potential if waste inputs are reduced. The findings highlight the important of improving waste management, especially capacity building and increased funding allocation. Strengthening each strategic approach of the MPAs can reduce plastic leakage into the sea and support coral reef recovery.","PeriodicalId":18215,"journal":{"name":"Marine pollution bulletin","volume":"51 1","pages":""},"PeriodicalIF":5.8,"publicationDate":"2026-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146146790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-09DOI: 10.1016/j.watres.2026.125546
Xinlei Wang, Tao Ding, Mianping Zheng, Denghong Wang, Zhen Nie, Gao Song
Driven by the global transition to low-carbon energy and the rapid development of the electric vehicle industry, the finite supply of lithium (Li) resources coupled with growing demand will exacerbate the imbalance between supply and demand. Current Li supply primarily relies on traditional resources such as salt lake brines and hard-rock ores. However, these resources exhibit concentrated geographic distribution and incur high environmental costs, posing severe constraints on sustainable resource utilization and supply chain security. Oil and gas produced water (OGPW), a persistent byproduct of hydrocarbon extraction, is regarded as a highly promising unconventional Li resource due to its widespread distribution and Li content far exceeding industrial-grade standards. Compared to traditional salt lake brines, OGPW exhibits characteristics such as low Li concentrations, high salinity, complex ionic compositions, abundant organic contaminants, and harsh field conditions, which substantially increase the technical difficulty of Li extraction. This review systematically summarizes recent advances in Li extraction technologies, covering evaporation-precipitation, solvent extraction, adsorption, membrane separation, and electrochemical technologies, while critically evaluating their applicability to OGPW under complex compositions and field conditions. The study emphasizes that efficient Li recovery from OGPW cannot rely on a single extraction technology. Instead, customized integrated process designs are required, combining complementary separation mechanisms to address the complex composition and field conditions of OGPW. Future research should focus on developing integrated process systems that synergistically achieve Li extraction and water treatment, thereby fulfilling dual objectives of resource recovery and environmental management.
{"title":"Lithium extraction from oil and gas produced water: resource characteristics, technological challenges and future perspectives","authors":"Xinlei Wang, Tao Ding, Mianping Zheng, Denghong Wang, Zhen Nie, Gao Song","doi":"10.1016/j.watres.2026.125546","DOIUrl":"https://doi.org/10.1016/j.watres.2026.125546","url":null,"abstract":"Driven by the global transition to low-carbon energy and the rapid development of the electric vehicle industry, the finite supply of lithium (Li) resources coupled with growing demand will exacerbate the imbalance between supply and demand. Current Li supply primarily relies on traditional resources such as salt lake brines and hard-rock ores. However, these resources exhibit concentrated geographic distribution and incur high environmental costs, posing severe constraints on sustainable resource utilization and supply chain security. Oil and gas produced water (OGPW), a persistent byproduct of hydrocarbon extraction, is regarded as a highly promising unconventional Li resource due to its widespread distribution and Li content far exceeding industrial-grade standards. Compared to traditional salt lake brines, OGPW exhibits characteristics such as low Li concentrations, high salinity, complex ionic compositions, abundant organic contaminants, and harsh field conditions, which substantially increase the technical difficulty of Li extraction. This review systematically summarizes recent advances in Li extraction technologies, covering evaporation-precipitation, solvent extraction, adsorption, membrane separation, and electrochemical technologies, while critically evaluating their applicability to OGPW under complex compositions and field conditions. The study emphasizes that efficient Li recovery from OGPW cannot rely on a single extraction technology. Instead, customized integrated process designs are required, combining complementary separation mechanisms to address the complex composition and field conditions of OGPW. Future research should focus on developing integrated process systems that synergistically achieve Li extraction and water treatment, thereby fulfilling dual objectives of resource recovery and environmental management.","PeriodicalId":443,"journal":{"name":"Water Research","volume":"7 1","pages":""},"PeriodicalIF":12.8,"publicationDate":"2026-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146146814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-09DOI: 10.1016/j.jclepro.2026.147728
Xiang Zheng, Zhaoping Zhong, Bo Zhang, Lihua Shen, Wei Wang, Renzhi Qi, Qihang Ye
During the fermentation of lignocellulosic biomass for biofuel, enzymatic hydrolysis lignin (EHL), a byproduct rich in aromatic ring structures, is generated in substantial quantities. Currently, most EHL is directly combusted or co-fired in boilers, resulting in environmental pollution and resource wastage. In this study, EHL and polyolefin waste were co-pyrolyzed to produce bio-oil, which was subsequently upgraded via catalytic hydrogenation to obtain high-quality biofuel. Based on our own experimental data, three H2 supply strategies (designated as Case 1 to 3) were simulated to optimize biofuel production from the co-pyrolysis-derived bio-oil: Case 1 utilized commercially purchased H2, Case 2 employed H2 produced via natural gas reforming, and Case 3 utilized H2 generated through partial reforming of the bio-oil itself. The systems were comparatively analyzed through three complementary methodologies‒life cycle assessment, exergy analysis, and techno-economic assessment‒implemented using eBalance, Aspen Plus, and custom calculations, respectively. Results revealed that Case 3 achieved the lowest biofuel production cost ($0.026 MJ−1) along with the highest exergy efficiency (42.56%), whereas Case 1 demonstrated the lowest environmental impact. Sensitivity analysis based on Monte Carlo simulations identified critical variables related to feedstock characteristics and resource inputs. Multi-criteria analysis was performed by normalizing energy, environmental, and economic indicators. The comprehensive evaluation indexes (CEIs) were calculated by assigning equal weight to energy utilization, environmental impact, and biofuel cost. The resulting CEIs for Case 1, Case 2, and Case 3 were 0.185, 0.231, and 0.172, respectively. The strategy of partial bio-oil reforming for H2 production in Case 3 demonstrates strong application potential.
{"title":"Catalytic co-pyrolysis-hydrogenation of lignin and polyolefin waste into biofuels: A comparative energy–environment–economy analysis of hydrogen sourcing strategies","authors":"Xiang Zheng, Zhaoping Zhong, Bo Zhang, Lihua Shen, Wei Wang, Renzhi Qi, Qihang Ye","doi":"10.1016/j.jclepro.2026.147728","DOIUrl":"https://doi.org/10.1016/j.jclepro.2026.147728","url":null,"abstract":"During the fermentation of lignocellulosic biomass for biofuel, enzymatic hydrolysis lignin (EHL), a byproduct rich in aromatic ring structures, is generated in substantial quantities. Currently, most EHL is directly combusted or co-fired in boilers, resulting in environmental pollution and resource wastage. In this study, EHL and polyolefin waste were co-pyrolyzed to produce bio-oil, which was subsequently upgraded via catalytic hydrogenation to obtain high-quality biofuel. Based on our own experimental data, three H<ce:inf loc=\"post\">2</ce:inf> supply strategies (designated as Case 1 to 3) were simulated to optimize biofuel production from the co-pyrolysis-derived bio-oil: Case 1 utilized commercially purchased H<ce:inf loc=\"post\">2</ce:inf>, Case 2 employed H<ce:inf loc=\"post\">2</ce:inf> produced via natural gas reforming, and Case 3 utilized H<ce:inf loc=\"post\">2</ce:inf> generated through partial reforming of the bio-oil itself. The systems were comparatively analyzed through three complementary methodologies‒life cycle assessment, exergy analysis, and techno-economic assessment‒implemented using eBalance, Aspen Plus, and custom calculations, respectively. Results revealed that Case 3 achieved the lowest biofuel production cost ($0.026 MJ<ce:sup loc=\"post\">−1</ce:sup>) along with the highest exergy efficiency (42.56%), whereas Case 1 demonstrated the lowest environmental impact. Sensitivity analysis based on Monte Carlo simulations identified critical variables related to feedstock characteristics and resource inputs. Multi-criteria analysis was performed by normalizing energy, environmental, and economic indicators. The comprehensive evaluation indexes (CEIs) were calculated by assigning equal weight to energy utilization, environmental impact, and biofuel cost. The resulting CEIs for Case 1, Case 2, and Case 3 were 0.185, 0.231, and 0.172, respectively. The strategy of partial bio-oil reforming for H<ce:inf loc=\"post\">2</ce:inf> production in Case 3 demonstrates strong application potential.","PeriodicalId":349,"journal":{"name":"Journal of Cleaner Production","volume":"315 1","pages":""},"PeriodicalIF":11.1,"publicationDate":"2026-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146146219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-09DOI: 10.1016/j.jhazmat.2026.141391
Hu Kai, Ding Hao, Wang Wei, Guo Rui, Chen Wei, Xu Hang
Tire microplastics (TMs), as a prominent environmental source of microplastic pollution, are aged and accumulated during their migration through drainage systems and sewage treatment facilities, most of which trapped in excess sludge. Consequently, this study systematically examines the concentration-dependent effects of TMs and aged TMs (ATMs) on anaerobic fermentation of excess sludge. Results showed that TMs and ATMs negatively affected acidogenic fermentation and organic matter hydrolysis. Low TMs concentration (0.002 g/g-VSS) and high ATMs concentration (0.2 g/g-VSS) resulted in concentration reductions of volatile fatty acids, soluble chemical oxygen demand, proteins, and polysaccharides ranged from 16.28% - 40.40% relative to the control group. In general, the detrimental effect demonstrated a positive correlation with ATM concentration. Conversely, low TMs concentration exerted a significant inhibitory impact compared with high concentration, which contradicted the hormetic effect. In response to TMs/ATMs stress, the microorganisms employed extracellular polymeric substances (EPS) secretion as a defense mechanism, with pronounced variations examined in protein content within tightly bound EPS and polysaccharide content in loosely bound EPS. Comprehensive mechanistic analysis revealed that although the incorporation of TMs/ATMs into fermentation system improved electron transfer efficiency through elevating electron transport system activity and sludge conductivity, TMs demonstrated superior interspecies electron transfer (IET) enhancement compared to ATMs, coupled with material-dependent suppression of hydrolytic and acidogenic bacterial consortia, which potentially altering the acid generation and microbial dynamics. Overall, our study provides critical insights for optimizing TMs control in sludge treatment by leveraging their differential profiles toward IET and bacterial consortia.
{"title":"Comparative Effects of Raw and Aged Tire Microplastics on Anaerobic Fermentation of Excess Sludge","authors":"Hu Kai, Ding Hao, Wang Wei, Guo Rui, Chen Wei, Xu Hang","doi":"10.1016/j.jhazmat.2026.141391","DOIUrl":"https://doi.org/10.1016/j.jhazmat.2026.141391","url":null,"abstract":"Tire microplastics (TMs), as a prominent environmental source of microplastic pollution, are aged and accumulated during their migration through drainage systems and sewage treatment facilities, most of which trapped in excess sludge. Consequently, this study systematically examines the concentration-dependent effects of TMs and aged TMs (ATMs) on anaerobic fermentation of excess sludge. Results showed that TMs and ATMs negatively affected acidogenic fermentation and organic matter hydrolysis. Low TMs concentration (0.002<!-- --> <!-- -->g/g-VSS) and high ATMs concentration (0.2<!-- --> <!-- -->g/g-VSS) resulted in concentration reductions of volatile fatty acids, soluble chemical oxygen demand, proteins, and polysaccharides ranged from 16.28% - 40.40% relative to the control group. In general, the detrimental effect demonstrated a positive correlation with ATM concentration. Conversely, low TMs concentration exerted a significant inhibitory impact compared with high concentration, which contradicted the hormetic effect. In response to TMs/ATMs stress, the microorganisms employed extracellular polymeric substances (EPS) secretion as a defense mechanism, with pronounced variations examined in protein content within tightly bound EPS and polysaccharide content in loosely bound EPS. Comprehensive mechanistic analysis revealed that although the incorporation of TMs/ATMs into fermentation system improved electron transfer efficiency through elevating electron transport system activity and sludge conductivity, TMs demonstrated superior interspecies electron transfer (IET) enhancement compared to ATMs, coupled with material-dependent suppression of hydrolytic and acidogenic bacterial consortia, which potentially altering the acid generation and microbial dynamics. Overall, our study provides critical insights for optimizing TMs control in sludge treatment by leveraging their differential profiles toward IET and bacterial consortia.","PeriodicalId":361,"journal":{"name":"Journal of Hazardous Materials","volume":"107 1","pages":""},"PeriodicalIF":13.6,"publicationDate":"2026-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146146169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-09DOI: 10.1016/j.watres.2026.125541
Mohsin Uddin, Jiale Xu
UV-based advanced oxidation process (AOP) is critical for wastewater recycling to control organic micropollutants (e.g., 1,4-dioxane) that remain in reverse osmosis permeates. Krypton chloride excimer lamp emitting at far-UVC 222 nm (UV222) is promising for water treatment. This study demonstrated that far-UVC light enhanced UV/NH2Cl compared with traditional low-pressure UV (LPUV) at 254 nm (UV254) for wastewater recycling. Its impacts on 1,4-dioxane (1,4-D) removal, radical steady-state concentrations, and DBP formation were assessed. A low fluence rate of 0.31 mW/cm2 was used due to fast photolysis of NH2Cl at 222 nm. UV222/NH2Cl at 50 mg Cl2/L exhibited a 1,4-D decay rate constant at 1.7 × 10-3 cm2/mJ, 17.2 times higher than UV254/NH2Cl. Far UVC at 222 nm also increased the direct photolysis rate of 1,4-D by 12-fold over LPUV. UV222/NH2Cl showed higher 1,4-D removal than UV222/NHCl2, followed by UV222/H2O2. Mechanistic investigation revealed that steady-state concentrations of •OH and Cl2•- from UV222/NH2Cl were 12 and 31 times higher than those from UV254/NH2Cl, respectively. Experiments using wastewater RO permeate, RO concentrate, and tap water showed that UV222/NH2Cl consistently achieved efficient control of 1,4-D even in complex matrices. UV222/NH2Cl exhibited slightly higher or similar risk compared with UV254/NH2Cl in generating precursors of disinfection byproducts. Overall, KrCl* excilamps-based AOP using NH2Cl provided efficient contaminant removal in wastewater recycling and merits further research.
{"title":"Far UVC (222 nm) Enhances Chloramine-Based Advanced Oxidation in Wastewater Recycling: 1,4-Dioxane Removal, Radical Generation, and DBP Formation","authors":"Mohsin Uddin, Jiale Xu","doi":"10.1016/j.watres.2026.125541","DOIUrl":"https://doi.org/10.1016/j.watres.2026.125541","url":null,"abstract":"UV-based advanced oxidation process (AOP) is critical for wastewater recycling to control organic micropollutants (e.g., 1,4-dioxane) that remain in reverse osmosis permeates. Krypton chloride excimer lamp emitting at far-UVC 222 nm (UV<sub>222</sub>) is promising for water treatment. This study demonstrated that far-UVC light enhanced UV/NH<sub>2</sub>Cl compared with traditional low-pressure UV (LPUV) at 254 nm (UV<sub>254</sub>) for wastewater recycling. Its impacts on 1,4-dioxane (1,4-D) removal, radical steady-state concentrations, and DBP formation were assessed. A low fluence rate of 0.31 mW/cm<sup>2</sup> was used due to fast photolysis of NH<sub>2</sub>Cl at 222 nm. UV<sub>222</sub>/NH<sub>2</sub>Cl at 50 mg Cl<sub>2</sub>/L exhibited a 1,4-D decay rate constant at 1.7 × 10<sup>-3</sup> cm<sup>2</sup>/mJ, 17.2 times higher than UV<sub>254</sub>/NH<sub>2</sub>Cl. Far UVC at 222 nm also increased the direct photolysis rate of 1,4-D by 12-fold over LPUV. UV<sub>222</sub>/NH<sub>2</sub>Cl showed higher 1,4-D removal than UV<sub>222</sub>/NHCl<sub>2</sub>, followed by UV<sub>222</sub>/H<sub>2</sub>O<sub>2</sub>. Mechanistic investigation revealed that steady-state concentrations of <sup>•</sup>OH and Cl<sub>2</sub><sup>•-</sup> from UV<sub>222</sub>/NH<sub>2</sub>Cl were 12 and 31 times higher than those from UV<sub>254</sub>/NH<sub>2</sub>Cl, respectively. Experiments using wastewater RO permeate, RO concentrate, and tap water showed that UV<sub>222</sub>/NH<sub>2</sub>Cl consistently achieved efficient control of 1,4-D even in complex matrices. UV<sub>222</sub>/NH<sub>2</sub>Cl exhibited slightly higher or similar risk compared with UV<sub>254</sub>/NH<sub>2</sub>Cl in generating precursors of disinfection byproducts. Overall, KrCl* excilamps-based AOP using NH<sub>2</sub>Cl provided efficient contaminant removal in wastewater recycling and merits further research.","PeriodicalId":443,"journal":{"name":"Water Research","volume":"39 1","pages":""},"PeriodicalIF":12.8,"publicationDate":"2026-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146146179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jessica McLean, Tommaso Jucker, Alice Rosen, Sean M. McMahon, Roberto Salguero‐Gómez
Forest disturbances are accelerating biodiversity loss and altering tree productivity worldwide. Post‐disturbance recovery time, a component of resilience, is critical for identifying vulnerable areas and targeting conservation but varies with environmental conditions. Monitoring recovery at scale requires tracking tree dynamics, yet traditional ground‐based approaches are resource‐intensive. We present a pipeline to parameterize integral projection models (IPMs) using LiDAR data and hyperspectral‐based species maps to assess post‐fire recovery across large, forested areas. Focusing on the fire‐adapted Picea mariana , we model passage times to reproductive heights and life expectancy under different fire regimes as indicators of recovery time. To do this, we combined hyperspectral‐based species maps and LiDAR‐based crown heights to track individual tree survival and growth at the Caribou‐Poker Creek Research Watershed (BONA) from 2017 to 2023. We incorporated fire history, aspect, slope, elevation and surrounding canopy height into our models and found partial support for their expected effects on survival and growth. Once accounting for topography and competition, we estimated passage times to reproductive maturity (11–22 years). Life expectancy in the absence of fire is shortest on North‐facing slopes with recent fire (581 years). Sensitivity analyses highlight fire history and aspect as key modulators of population resilience, with elevation exerting strong influence on life expectancy across all conditions. Our results demonstrate that remotely sensed IPMs can effectively quantify forest recovery at scale, revealing that in some contexts, stands of P. mariana may not recover between fire disturbances. We discuss the implications of these findings for advancing modelling of resilience and highlight both the challenges and opportunities of using LiDAR and hyperspectral data to build demographic models for forecasting forest dynamics.
{"title":"Hyperspectral species maps and LiDAR‐based structured population models show future forest fire frequency may compromise forest resilience","authors":"Jessica McLean, Tommaso Jucker, Alice Rosen, Sean M. McMahon, Roberto Salguero‐Gómez","doi":"10.1002/rse2.70057","DOIUrl":"https://doi.org/10.1002/rse2.70057","url":null,"abstract":"Forest disturbances are accelerating biodiversity loss and altering tree productivity worldwide. Post‐disturbance recovery time, a component of resilience, is critical for identifying vulnerable areas and targeting conservation but varies with environmental conditions. Monitoring recovery at scale requires tracking tree dynamics, yet traditional ground‐based approaches are resource‐intensive. We present a pipeline to parameterize integral projection models (IPMs) using LiDAR data and hyperspectral‐based species maps to assess post‐fire recovery across large, forested areas. Focusing on the fire‐adapted <jats:italic>Picea mariana</jats:italic> , we model passage times to reproductive heights and life expectancy under different fire regimes as indicators of recovery time. To do this, we combined hyperspectral‐based species maps and LiDAR‐based crown heights to track individual tree survival and growth at the Caribou‐Poker Creek Research Watershed (BONA) from 2017 to 2023. We incorporated fire history, aspect, slope, elevation and surrounding canopy height into our models and found partial support for their expected effects on survival and growth. Once accounting for topography and competition, we estimated passage times to reproductive maturity (11–22 years). Life expectancy in the absence of fire is shortest on North‐facing slopes with recent fire (581 years). Sensitivity analyses highlight fire history and aspect as key modulators of population resilience, with elevation exerting strong influence on life expectancy across all conditions. Our results demonstrate that remotely sensed IPMs can effectively quantify forest recovery at scale, revealing that in some contexts, stands of <jats:italic>P. mariana</jats:italic> may not recover between fire disturbances. We discuss the implications of these findings for advancing modelling of resilience and highlight both the challenges and opportunities of using LiDAR and hyperspectral data to build demographic models for forecasting forest dynamics.","PeriodicalId":21132,"journal":{"name":"Remote Sensing in Ecology and Conservation","volume":"133 1","pages":""},"PeriodicalIF":5.5,"publicationDate":"2026-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146146105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-09DOI: 10.1080/10256016.2026.2617939
Abdul-Wali Ajlouni, Kholoud Kharisat, Mahmoud Kulab, Ahmed Qwasmeh, Naima Amrani, Zinab Matar, Hana Almarri, Khaled Ali
This study aims to determine the specific activity of natural uranium isotopes, including uranium-238 (238U), uranium-234 (234U), and uranium-235 (235U), in soil and vegetable samples - specifically tomato, potato, onion, carrot, and radish - collected from the Tafila district, Jordan, and to assess the soil-to-plant transfer factors using alpha spectrometry with a passivated implanted planar silicon (PIPS) detector. A total of eight soil samples and eight corresponding vegetable samples were obtained from eight distinct locations. The results revealed considerable spatial variability in uranium activity concentrations, reflecting the influence of geological formations and environmental conditions. The average activity concentrations were 251.6 ± 14.2 Bq/kg for 238U, 10.5 ± 1.9 Bq/kg for 235U, and 248.8 ± 13.9 Bq/kg for 234U in soil samples, while vegetable samples showed lower concentrations of 3.2 ± 0.16, 0.21 ± 0.05, and 3.1 ± 0.17 Bq/kg for 238U, 235U, and 234U, respectively. The calculated transfer factors ranged from 4.4 ± 0.4 × 10-3 to 29.1 ± 1.8 × 10-3 for 238U, 6.4 ± 1.4 × 10-3 to 33.0 ± 15.7 × 10-3 for 235U, and 4.3 ± 0.4 × 10-3 to 28.7 ± 1.9 × 10-3 for 234U, which reflects notable differences in uranium uptake efficiency among the studied plant species. A strong correlation (R2 = 0.99) was observed between 238U and 234U in both soil and vegetable samples, suggesting isotopic equilibrium through natural decay. These findings provide essential baseline data for future studies on uranium mobility, bioavailability, and potential radiological risks in agricultural systems within the Tafila District.
{"title":"Alpha spectrometric analysis and environmental assessment of uranium concentrations in soil and vegetation from the Tafila District, Jordan.","authors":"Abdul-Wali Ajlouni, Kholoud Kharisat, Mahmoud Kulab, Ahmed Qwasmeh, Naima Amrani, Zinab Matar, Hana Almarri, Khaled Ali","doi":"10.1080/10256016.2026.2617939","DOIUrl":"https://doi.org/10.1080/10256016.2026.2617939","url":null,"abstract":"<p><p>This study aims to determine the specific activity of natural uranium isotopes, including uranium-238 (<sup>238</sup>U), uranium-234 (<sup>234</sup>U), and uranium-235 (<sup>235</sup>U), in soil and vegetable samples - specifically tomato, potato, onion, carrot, and radish - collected from the Tafila district, Jordan, and to assess the soil-to-plant transfer factors using alpha spectrometry with a passivated implanted planar silicon (PIPS) detector. A total of eight soil samples and eight corresponding vegetable samples were obtained from eight distinct locations. The results revealed considerable spatial variability in uranium activity concentrations, reflecting the influence of geological formations and environmental conditions. The average activity concentrations were 251.6 ± 14.2 Bq/kg for <sup>238</sup>U, 10.5 ± 1.9 Bq/kg for <sup>235</sup>U, and 248.8 ± 13.9 Bq/kg for <sup>234</sup>U in soil samples, while vegetable samples showed lower concentrations of 3.2 ± 0.16, 0.21 ± 0.05, and 3.1 ± 0.17 Bq/kg for <sup>238</sup>U, <sup>235</sup>U, and <sup>234</sup>U, respectively. The calculated transfer factors ranged from 4.4 ± 0.4 × 10<sup>-3</sup> to 29.1 ± 1.8 × 10<sup>-3</sup> for <sup>238</sup>U, 6.4 ± 1.4 × 10<sup>-3</sup> to 33.0 ± 15.7 × 10<sup>-3</sup> for <sup>235</sup>U, and 4.3 ± 0.4 × 10<sup>-3</sup> to 28.7 ± 1.9 × 10<sup>-3</sup> for <sup>234</sup>U, which reflects notable differences in uranium uptake efficiency among the studied plant species. A strong correlation (<i>R</i><sup>2</sup> = 0.99) was observed between <sup>238</sup>U and <sup>234</sup>U in both soil and vegetable samples, suggesting isotopic equilibrium through natural decay. These findings provide essential baseline data for future studies on uranium mobility, bioavailability, and potential radiological risks in agricultural systems within the Tafila District.</p>","PeriodicalId":14597,"journal":{"name":"Isotopes in Environmental and Health Studies","volume":" ","pages":"1-18"},"PeriodicalIF":1.4,"publicationDate":"2026-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146142368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Stresses (e.g., high temperature, drought, and pests) can reshape the structure of root-associated microbial communities, but how to discover functional microbial community assembly to support plant health remains a great challenge. Here we found that root-knot nematode (RKN) infection restructured the rhizosphere bacterial community in RKN-susceptible cucumber plants, regardless of the soil type. We isolated a Rhizobium pusense strain, TYQ1, which was significantly enriched following RKN infection. This strain not only directly inhibited RKNs but also caused the restructuring of the rhizobacterial community, thereby leading to the enrichment of multiple biomarker species. These enriched microorganisms, in collaboration with TYQ1, enhanced the biofilm-forming ability of the community and established a tightly interconnected metabolic interaction network, further strengthening the colonization of TYQ1 in the rhizosphere. Ultimately, the TYQ1-centered synthetic community exhibited more efficient and stable inhibition of RKNs. These findings highlight that stress-induced recruitment of keystone species can guide functional microbial community assembly to synergistically enhance plant health.
{"title":"Stress-induced keystone species facilitate functional microbial community assembly to suppress root-knot nematodes for susceptible plants.","authors":"Xingqun Liu, Mengyuan Song, Zhicheng Xue, Qiannan Zhang, Lihong Gao, Yongqiang Tian","doi":"10.1093/ismejo/wrag022","DOIUrl":"https://doi.org/10.1093/ismejo/wrag022","url":null,"abstract":"<p><p>Stresses (e.g., high temperature, drought, and pests) can reshape the structure of root-associated microbial communities, but how to discover functional microbial community assembly to support plant health remains a great challenge. Here we found that root-knot nematode (RKN) infection restructured the rhizosphere bacterial community in RKN-susceptible cucumber plants, regardless of the soil type. We isolated a Rhizobium pusense strain, TYQ1, which was significantly enriched following RKN infection. This strain not only directly inhibited RKNs but also caused the restructuring of the rhizobacterial community, thereby leading to the enrichment of multiple biomarker species. These enriched microorganisms, in collaboration with TYQ1, enhanced the biofilm-forming ability of the community and established a tightly interconnected metabolic interaction network, further strengthening the colonization of TYQ1 in the rhizosphere. Ultimately, the TYQ1-centered synthetic community exhibited more efficient and stable inhibition of RKNs. These findings highlight that stress-induced recruitment of keystone species can guide functional microbial community assembly to synergistically enhance plant health.</p>","PeriodicalId":50271,"journal":{"name":"ISME Journal","volume":" ","pages":""},"PeriodicalIF":10.0,"publicationDate":"2026-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146144629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
扫码关注我们
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号