Environmental Research最新文献

{"title":"Evaluation of functional capacity and plastic-degrading potential of Bacillus spp. and other bacteria derived from the Getliņi landfill (Latvia).","authors":"Sara Pereira, Marta Rubina, Ance Roga, Tūrs Selga, Edmunds Skinderskis, Dita Gudrā, Ineta Kalniņa, Kārlis Vonda, Dāvids Fridmanis, Olga Muter","doi":"10.1016/j.envres.2025.121849","DOIUrl":"https://doi.org/10.1016/j.envres.2025.121849","url":null,"abstract":"<p><p>The mechanisms of plastic biodegradation by microorganisms remain poorly understood because of high variability in environmental conditions. This study aimed to isolate, identify, and characterise bacteria with plastic-degrading potential derived from the Getliņi EKO landfill (Riga, Latvia). Among the bacteria selected, Bacillus was the predominant genus identified, whereas Pseudomonas dominated the metagenome. Comparative testing revealed the highest non-specific esterase activity in cultures of B. licheniformis and B. altitudinis. Following a 6-week batch experiment, a newly developed bacterial consortium biologically reduced the weight of untreated low-density polyethylene (LDPE), polyethylene terephthalate (PET), and high-density polyethylene (HDPE) by 19.44%, 5.99%, and 2.58%, respectively. Thermally pre-treated PET and acid pre-treated HDPE resulted in greater weight losses than their respective untreated forms. Scanning electron microscopy primarily showed single cells and microcolonies attached to the granule surfaces. Microbial respiration and fluorescein diacetate hydrolysis tests suggested that the granules had a stimulating effect on the metabolic activity of planktonic cells. Cultures with untreated LDPE and PET exhibited the highest ecotoxicity for Thamnocephalus platyurus, reducing ingestion activity by 60.39% and 71.25% of the control, respectively. In conclusion, the Getliņi EKO landfill appears to be a promising sampling source for bacteria capable of biodegrading fossil-based polymers. Further refinement of methods for the isolation and evaluation of plastic degraders will provide new insights into the potential of microbial resources for plastic degradation.</p>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":" ","pages":"121849"},"PeriodicalIF":7.7,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144075165","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}

{"title":"Dynamic microbial community assembly and molecular ecological network responses in biological activated carbon filters: effects of algal organic matter exposure and empty bed contact time","authors":"Fei Han ,&nbsp;Zhiwei Zhou ,&nbsp;Chaoran Liu ,&nbsp;Zedong Lu ,&nbsp;Liping Tian ,&nbsp;Xing Li","doi":"10.1016/j.envres.2025.121833","DOIUrl":"10.1016/j.envres.2025.121833","url":null,"abstract":"<div><div>Biological activated carbon (BAC) filtration plays a crucial role in advanced drinking water treatment. Recent researches have shifted from decontamination performance evaluation to process optimization and customization of microbial communities. The responses of microbial communities to seasonal water quality variations caused by algal outbreaks or deaths, and operational conditions of filtration medium and empty bed contact time (EBCT), along with dynamics of assembly processes and molecular ecological networks remain insufficiently understood. Herein, the decontamination performance of four BAC columns packed with varied physicochemical properties of granular activated carbon (GAC), exposed to algal organic matter (AOM) and changes of EBCT was investigated. Microbial diversity, assembly mechanisms, and dynamics of molecular ecological networks were systematically evaluated. Results showed that coal-based BAC exhibited superior decontamination performance under AOM exposure, with average removals of COD_Mn (47.23 %), UV₂₅₄ (55.82 %), and NH₄⁺-N (65.01 %), along with higher microbial diversity and richness than that of wood-based BAC. AOM exposure increased microbial diversity, while shortened EBCT reduced it. Deterministic processes in community assembly intensified under both AOM exposure and a shortened EBCT of 10 min, the proportion were up to 82 % and 75 %, respectively. AOM exposure increased network scale and complexity, whereas the opposite trend was observed with a shortened EBCT of 10min. Structural equation modeling identified that influent water quality (path coefficient = 1.00) was the dominant driver of microbial diversity, followed by GAC properties (0.30) and EBCT (−0.35). These findings provide insights for microbial community customization and BAC process optimization to control algal-derived organic contamination.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"279 ","pages":"Article 121833"},"PeriodicalIF":7.7,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144068356","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}

{"title":"An innovative method for identifying aquatic environmental characteristics: construction of water quality fingerprint spectrum and combination with two-dimensional correlation spectroscopy analysis","authors":"Kuotian Lu ,&nbsp;Xiaobo Gao ,&nbsp;Dongping Liu ,&nbsp;Shixiang Zhang ,&nbsp;Qingqian Li ,&nbsp;Hongjie Gao ,&nbsp;Huibin Yu","doi":"10.1016/j.envres.2025.121810","DOIUrl":"10.1016/j.envres.2025.121810","url":null,"abstract":"<div><div>With the deterioration of water quality and explosion of data scale, the diversification and complication of water quality analysis tasks are increasing, which require advanced analysis and visualization methods. Current multivariate statistical methods face challenges in processing multi-dimensional data and conducting causal analysis of fluctuations in water quality over temporal or spatial variations. In this study, a water quality fingerprint spectrum was constructed to perform multiscale and large-volume dataset. Based on the water quality fingerprint spectrum, a workflow of water quality was proposed for exploring the priority control regions, periods, and parameters were identified, and the key factors and effect pathways of response mechanisms, which consisted of three modules: data preparation, data interpretation, and causal analysis. In this study, we constructed a water quality fingerprint spectrum based on 792 water quality data from Lake Shahu as an example to present the methodology. The results showed that COD_Cr, TN, and TP were identified as priority control parameters of Lake Shahu, which were mainly affected by tourism activities and water replenishment. According to the results to conduct causal analysis, we found that the water replenishment could directly improve water quality (total effect: −0.464) by inhibition of algal growth and dilution of COD_Cr and TP concentrations, while tourism activities do the opposite (total effect: 0.562). The innovative analysis method conducted a thorough examination of fluctuations in water quality over spatio-temporal variations and paved the way between data and practical requirements in future works of water quality analysis and management.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"279 ","pages":"Article 121810"},"PeriodicalIF":7.7,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143946629","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}

{"title":"Comparison of air pollution mortality effect estimates using different long-term exposure assessment modelling methods","authors":"Femke Bouma ,&nbsp;Nicole AH. Janssen ,&nbsp;Joost Wesseling ,&nbsp;Sjoerd van Ratingen ,&nbsp;Jules Kerckhoffs ,&nbsp;Ulrike Gehring ,&nbsp;Wouter Hendricx ,&nbsp;Kees de Hoogh ,&nbsp;Roel Vermeulen ,&nbsp;Gerard Hoek","doi":"10.1016/j.envres.2025.121832","DOIUrl":"10.1016/j.envres.2025.121832","url":null,"abstract":"<div><h3>Introduction</h3><div>Epidemiological studies have used different approaches to assess long-term exposure to ambient air pollution. Little is known about how different exposure models affect health effect estimates in these studies. The aim of this study was to compare air pollution mortality effect estimates in an administrative cohort in the Netherlands based on different exposure assessment methods for black carbon (BC), nitrogen dioxide (NO₂), ultrafine particles (UFP), and particulate matter &lt;2.5 μm (PM_2.5).</div></div><div><h3>Methods</h3><div>Annual average air pollution exposure estimates using eight methods, differing in modelling and monitoring strategy, were applied to a Dutch national cohort of 10.7 million adults aged ≥30 years. Dispersion and land-use regression models based on mobile and fixed-site monitoring were evaluated. Follow-up was from 2013 to 2019. Hazard ratios (HR) for natural and cause-specific mortality were estimated using Cox proportional hazards models.</div></div><div><h3>Results</h3><div>Exposure estimates from different models were highly correlated. Even though the direction of mortality effect estimates was similar between methods, their magnitude differed substantially, e.g. the HR for BC with natural mortality ranged from 1.01 to 1.09 per increment of 1 μg/m³. No consistent differences in effect estimates were found between deterministic and empirical fixed-site and mobile models. Model predictions over a 10-year period correlated highly and resulted in similar HRs.</div></div><div><h3>Discussion</h3><div>Different exposure models resulted in similar conclusions about the presence of associations with mortality, but HRs differed up to a ratio of 1.27. Differences in exposure assessment may therefore contribute to the observed heterogeneity of mortality estimates in systematic reviews of epidemiological studies.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"279 ","pages":"Article 121832"},"PeriodicalIF":7.7,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144068310","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}

{"title":"Risk-based integrated framework for evaluating effects of microplastics to aquatic ecosystems and human health.","authors":"Ruei-Feng Shiu, Tzu-Jung Chen, Fan-Hua Nan, Hsiao-Chang Tsao, Min-Pei Ling","doi":"10.1016/j.envres.2025.121838","DOIUrl":"https://doi.org/10.1016/j.envres.2025.121838","url":null,"abstract":"<p><p>The widespread presence of microplastics (MPs) in environments and the food web is a serious concern for both aquatic ecosystems and human health. Most studies have used single tool to assess risks primarily to organisms and humans, leaving gaps in comprehensive risk assessments. This study conducted an investigation of MP abundances in surface water and wild oysters from natural estuaries of major rivers in Taiwan. Additionally, the data also used to develop an integrated risk-based framework for evaluating potential risks from organisms to human MP exposure to seafood consumption. We assessed aquatic ecological risk quotients (RQ), oyster mortality exceedance risk (ER), human MP intake exposure, and human liver damage ER. Our data showed that MP abundances ranged from 0.025-4.701 items/m³ and 0.015-2.374 items/g (wet weight) in water and oysters, respectively. Although RQ values indicate negligible risk for aquatic ecosystems, but oyster mortality ER results from oysters exposed to MPs showed a 6% increase in mortality (10% risk). The probabilistic representation of risk curves of MPs for alanine aminotransferase (ALT) levels in human serum was found to be low, indicating minimal health risk to humans. Overall, our data suggest that relying on a single risk indicator may underestimate potential risks, multi-faceted tools are recommended for assessing organism and human health.</p>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":" ","pages":"121838"},"PeriodicalIF":7.7,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144075169","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}

{"title":"Spatio-temporal distribution of environmental DNA from amphibian and turtle species in a pond ecosystem","authors":"Zehua Xiao ,&nbsp;Shanshan Dong ,&nbsp;Zhenhua Zhang ,&nbsp;Shanze Qi ,&nbsp;Yaqiong Wan ,&nbsp;Zhiping Song","doi":"10.1016/j.envres.2025.121834","DOIUrl":"10.1016/j.envres.2025.121834","url":null,"abstract":"<div><div>Environmental DNA (eDNA) analysis has emerged as a transformative tool for biodiversity monitoring and conservation. However, uncertainties in the ecological processes of eDNA in aquatic environments decrease the reliability of eDNA-based surveys. Understanding the distribution and persistence patterns of eDNA is essential to effectively correlate eDNA data with species occurrence across spatial and temporal scales. Here, we investigated the spatio-temporal distribution of eDNA from amphibian and turtle species in a pond ecosystem, by establishing controlled eDNA sources from American bullfrogs (<em>Lithobates catesbeianus</em>) and red-eared sliders (<em>Trachemys scripta elegans</em>), and quantifying eDNA concentrations from different water layers and sediment samples using droplet digital PCR. Our results showed that eDNA from both species was highly concentrated within 2–5 m of the biological sources, with dispersal distance independent of the duration of organism' presence in the pond and exhibiting a vertically increasing trend over time. eDNA concentration and persistence varied significantly depending on species and substrate type, with bullfrogs showing notably higher eDNA detectability. The average eDNA concentration in sediment was 1.4 × 10⁴ times higher than in water, and eDNA persisted approximately one week longer. Our findings demonstrate that the strong aggregation patterns of eDNA can provide valuable insights into the spatial distribution of amphibians and turtles in pond systems. eDNA from surface water showed greater timeliness for biodiversity monitoring and aquatic invasive species management. The specificity of target taxa and the temporal complementarity of sedimentary eDNA should be carefully considered in future eDNA sampling designs.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"279 ","pages":"Article 121834"},"PeriodicalIF":7.7,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143936381","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}

{"title":"Joint effects of environmental and neighborhood socioeconomic factors on cognitive function in the Heinz Nixdorf Recall Study","authors":"Katherine Ogurtsova ,&nbsp;Grace M. Christensen ,&nbsp;Vanessa J. Soppa ,&nbsp;Martha Jokisch ,&nbsp;Lilian Tzivian ,&nbsp;Christian Weimar ,&nbsp;Nico Dragano ,&nbsp;Börge Schmidt ,&nbsp;Anke Hüls ,&nbsp;Barbara Hoffmann","doi":"10.1016/j.envres.2025.121830","DOIUrl":"10.1016/j.envres.2025.121830","url":null,"abstract":"<div><h3>Background</h3><div>Modifiable physical and social environments are believed to influence cognitive health in older age.</div></div><div><h3>Objectives</h3><div>To employ cutting-edge methods to analyze the impact of correlated environmental and socioeconomic neighborhood factors on cognitive function in German older participants.</div></div><div><h3>Methods</h3><div>In the German Heinz Nixdorf Recall cohort study, participants underwent neuropsychological testing at the first follow-up examination (2006–2008) to derive a global cognitive score (GCS). Long-term exposure to air pollution was estimated by the land-use regression and chemistry transport models. Road traffic noise was assessed as outdoor weighted 24h and nighttime means. Seven neighborhood-level socioeconomic position (nSEP) characteristics were linked from administrative data. The joint effects of exposure combinations on GCS were estimated using two dimensionality reduction techniques: principal component (PC) analysis (PCA) and self-organizing maps (SOM).</div></div><div><h3>Results</h3><div>Overall, 3748 individuals were included (median age 65 years; 50.7 % female). In single-exposure linear regression analysis, higher particle matter with aerodynamic diameter ≤2.5 μm (PM_2.5) and nitrogen oxides exposure, higher proportion of welfare recipients, and lower living area per resident were negatively associated with GCS. In the PCA, the first principal component (PC), the direction of maximum variance, was positively correlated with all disadvantageous nSEP factors and higher concentrations of all environmental exposures except ozone. This PC was associated with lower GCS. SOM revealed associations with lower GCS for 3 of 6 exposure clusters. These clusters were characterized by low nSEP (Cluster 1), high environmental exposure (Cluster 4) and high concentration of accumulation mode particle number concentration (Cluster 5).</div></div><div><h3>Discussion</h3><div>We identified associations between distinct combinations of intercorrelated air pollution, road traffic noise, and nSEP disadvantages with poorer cognitive function, using two different dimensionality reduction methods. Our findings highlight the importance of considering combined environmental and social exposures to systematically assess the potential benefits of multimodal urban interventions aimed at mitigating these risk factors.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"279 ","pages":"Article 121830"},"PeriodicalIF":7.7,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143946628","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}

{"title":"Short-term exposure to ultrafine particles and respiratory infection hospital admissions in children in Copenhagen, Denmark","authors":"Marie L. Bergmann ,&nbsp;Zorana J. Andersen ,&nbsp;Andreas Massling ,&nbsp;Steffen Loft ,&nbsp;Thomas Cole-Hunter ,&nbsp;Claus Nordstrøm ,&nbsp;Stéphane Tuffier ,&nbsp;Jiawei Zhang ,&nbsp;Youn-Hee Lim","doi":"10.1016/j.envres.2025.121831","DOIUrl":"10.1016/j.envres.2025.121831","url":null,"abstract":"<div><h3>Introduction</h3><div>Short-term exposure to ultrafine particles (UFP; &lt;100 nm) may trigger respiratory hospitalizations, potentially even more so among children than adults, but available evidence is limited. We examined the association between short-term UFP exposure and respiratory infection hospital admissions in children in Copenhagen, Denmark.</div></div><div><h3>Methods</h3><div>Daily concentrations of UFP were monitored at an urban background station during 2002–2018. Hospital admissions for lower and upper respiratory infections (LRTIs/URTIs), pneumonia, bronchitis, and influenza in children (0–18 years) were obtained from the Danish National Patient Register. Associations between UFP concentrations up to one week prior to admission and hospital admissions were examined using case-crossover design. Relative risks (RR) with 95 % confidence intervals (CI) were estimated per interquartile range (IQR) increase in UFP for the total population, and by sex, age (0-4/5-14/15-18 years) and socio-economic status (income, mother's education).</div></div><div><h3>Results</h3><div>We observed 109,585 hospital admissions for respiratory infections. We found positive associations of UFP with total respiratory infections, URTIs, and pneumonia with RRs of 1.04 (95 % CI: 1.01, 1.06), 1.04 (1.01, 1.08), and 1.06 (1.01, 1.12), respectively, per IQR increase in three-day mean UFP (lag 0–2), that were robust to PM_2.5 and NO₂ adjustment. Associations were stronger in boys and children younger than 15 years, with no differences between socio-economic groups.</div></div><div><h3>Conclusion</h3><div>Short-term exposure to UFP triggered hospital admissions for respiratory infections, especially URTIs and pneumonia, in children in Copenhagen independently from PM_2.5 and NO₂. Our findings emphasize the need for policies and regulations aimed at improving urban air quality to protect children's health.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"279 ","pages":"Article 121831"},"PeriodicalIF":7.7,"publicationDate":"2025-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143941422","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}

{"title":"Red mud-based magnetic biochar composite as a peroxydisulfate activator for tetracycline degradation","authors":"Chao Shen ,&nbsp;Xinxin Dong ,&nbsp;Jing Yang ,&nbsp;Yafei Li ,&nbsp;Shihai Cui ,&nbsp;Dapeng Zhang ,&nbsp;Xiaochen Lin","doi":"10.1016/j.envres.2025.121793","DOIUrl":"10.1016/j.envres.2025.121793","url":null,"abstract":"<div><div>Red mud is the world's most extensively generated waste in the non-ferrous metal industry. Its utilization remains challenging, with disposal primarily relying on storage. Due to its strong alkalinity, it poses significant environmental risks. This study investigated the potential for high-value utilization of red mud-based catalyst, WR800, which was obtained via a one-step calcination method of red mud and wheat straw at high-temperature. The material effectively activated peroxydisulfate and achieved 97.7 % degradation of TC (20 mg/L) within 60 min. Singlet oxygen (¹O₂) and hydroxyl radicals (•OH) were identified as the active species. WR800 exhibited well pH adaptability and resilience to common anions, addressing challenges in real-world wastewater treatment. Additionally, the magnetic properties of WR800 facilitated its easy recovery, and it retained the ability to degrade 99.9 % of tetracycline even after four regeneration cycles. Turning red mud and wheat straw into a sustainable catalyst provides a low-cost and environmentally friendly solution for treating water polluted with antibiotics and is in line with circular economy principles. This study shows possible potential for industrial use in reducing antibiotic contamination and provides an idea for industrial and agricultural waste disposal.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"279 ","pages":"Article 121793"},"PeriodicalIF":7.7,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143954718","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}

{"title":"Identification of novel strain Acinetobacter baumannii H1 and its improvement capacity for nutrient removal after coimmobilized on activated carbon and CaCO3 in real aquaculture wastewater","authors":"Yonghao Ma ,&nbsp;Hu Shu ,&nbsp;Huijie Lu ,&nbsp;Jiayi Zhou ,&nbsp;Jichen Zhao ,&nbsp;Fengkun Liu ,&nbsp;Yuting Liu ,&nbsp;Xunheng Lai ,&nbsp;Junduo Lin ,&nbsp;Qiang Guo ,&nbsp;Sha Yue ,&nbsp;Wen Huang","doi":"10.1016/j.envres.2025.121809","DOIUrl":"10.1016/j.envres.2025.121809","url":null,"abstract":"<div><div>A new strain H1, <em>Acinetobacter baumannii</em>, exhibited the 96 % nitrogen and 76 % phosphate removal efficiencies in suspension environment after 48 h, and the optimal conditions were obtained at pH of 7–8, temperature of 30 °C, carbon source of succinate, carbon-nitrogen ratio of 10 and phosphorus-nitrogen ratio of 0.2, respectively. The immobilization experiments with activated carbon and CaCO₃ were carried out, the optimal formula was 30 g/L CaCO₃, 15 g/L activated carbon-bacteria complex, 2 % CaCl₂ and a 1:1 embedding agent ratio. The removal efficiency of NH₄⁺-N, total nitrogen, total phosphorus and chemical oxygen demand in immobilized H1 was 288.89 %, 121.87 %, 135.69 % and 667.21 % higher than that by free strain in group With Indigenous Bacteria, respectively. Under the real water environment, the nitrogen concentrations in the immobilization groups were 3–4 times lower than those of the suspension groups, and the abundances of N and P metabolism-associated bacterial communities (Proteobacteria and Patescibacteria) were higher in the immobilization groups. These results provided an approach for the practical application in aquaculture tailwater treatment.</div></div>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":"279 ","pages":"Article 121809"},"PeriodicalIF":7.7,"publicationDate":"2025-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143942098","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}