Environmental Science and Pollution Research最新文献

{"title":"Algae and the city: the genetic and ecophysiological diversity of photobionts in two areas of Madrid (Spain) with contrasting levels of nitrogen pollution.","authors":"Francisco Gasulla, Leonardo M Casano, Sergio Pérez-Ortega","doi":"10.1007/s11356-025-36681-0","DOIUrl":"https://doi.org/10.1007/s11356-025-36681-0","url":null,"abstract":"<p><p>Diverse hypotheses have been proposed to explain the low diversity and abundance of lichens in large cities, including high nitrogen pollution and the heat-island effect. Furthermore, it remains unclear which partner, the mycobiont or the photobiont, is more affected by these stresses that limit lichen survival. This study aimed to explore how nitrogen pollution and xeric conditions affect lichen photobionts. Photobionts from 25 lichen species in seminatural and urban areas of Madrid (Spain) were identified by amplifying the nrITS barcode region. Sixteen species-level strains were detected, including 6 new species-level lineages. Four photobiont strains were selected for physiological experiments based on their hosts' environmental preferences: Trebouxia A74, found only in urban lichens; T. jamesii, found only in semi-natural environments; and T. I01 and T. gigantea, found in both environments. These strains were cultured in vitro, and their photosynthetic activity was monitored under varying concentrations of KNO₃ and (NH₄)₂SO₄ for 12 weeks, with biomass quantified at the end of the experiment. Additionally, the photosynthesis response to long-term desiccation was analysed over 15 months. T. jamesii was negatively affected by exposure to nitrogen compounds and desiccation. In contrast, low concentrations of ammonium and nitrate stimulated growth in the other species, especially in T. A74, while desiccation even improved the photosynthetic performance of T. I01 and T. gigantea. These findings demonstrate that different Trebouxia phycobionts exhibit distinct species-specific physiological traits that may influence their lichen hosts' ability to survive in urban environments.</p>","PeriodicalId":545,"journal":{"name":"Environmental Science and Pollution Research","volume":" ","pages":""},"PeriodicalIF":5.8,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144599056","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}

{"title":"New sorbents for the hydrometallurgical recovery of gold from electric and electronic wastes.","authors":"Antonio Di Colandrea, Luigi Piero Di Bonito, Paraskevas Kyriacou, Theodora Krasia-Christoforou, Giovanna Ruoppolo, Francesco Di Natale","doi":"10.1007/s11356-025-36712-w","DOIUrl":"https://doi.org/10.1007/s11356-025-36712-w","url":null,"abstract":"<p><p>This study examines the adsorption performance of functionalized electrospun fibers (EFs) and an amine-loaded metal-organic framework (UiO-66-NH₂) for gold recovery, testing model acidic solutions simulating Waste Electrical and Electronic Equipment (WEEE) hydrometallurgical leachates. Dithioester-functionalized EFs and UiO-66-NH₂ were selected for their stability in the acidic environment, the affinity for gold via thiol and amine groups, and the potential formation of gold nanoparticles through surface reduction. Experiments reveal that EFs exhibited excellent stability, easy separation, and high adsorption capacities, overcoming 100 mg/g in various operating conditions, even at a dissolved gold concentration below 20 mg/L. DTE provides a clear improvement of the adsorption capacity (around 27 mg/g for the plain EFs in contrast to 32-34 mg/g for the DTE-loaded fibers at 1 M HCl and 20 mg/g Au as initial concentration), dependent on the solution acidity and quickly approaching saturation, also at low gold concentration, testifying to the strong affinities between gold, amine, and thiol groups. Copper ions had a synergistic effect on gold uptake, enhancing adsorption and precipitation phenomena, and EFs exploited their best performance in highly acidic conditions (around 71 mg/g for the plain EFs in contrast to 96-104 mg/g for the DTE-loaded fibers at 1 M HCl and 20 mg/g Au as initial concentration), making them suitable for hydrometallurgical treatments. In contrast, UiO-66-NH₂ was more effective at solution pH = 2 and showed competitive adsorption between gold and copper, reducing its efficiency. Sodium ions had a mild competitive effect, but DTE-functionalized EFs maintained high selectivity toward gold. Spent EFs analysis further confirmed their potential for selective gold recovery, suggesting promising applications in refining WEEE leachates and in using gold-loaded sorbent as a functional material, useful, for example, to produce waste-derived catalysts.</p>","PeriodicalId":545,"journal":{"name":"Environmental Science and Pollution Research","volume":" ","pages":""},"PeriodicalIF":5.8,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144582769","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}

{"title":"Pre-pilot scale degradation of cationic and anionic dyes by ozone nanobubbles.","authors":"Dinh-Trinh Tran, Thi-Duyen To, Thu-Hien Le, Quang-Thuy Dao, Long D Nghiem","doi":"10.1007/s11356-025-36738-0","DOIUrl":"https://doi.org/10.1007/s11356-025-36738-0","url":null,"abstract":"<p><p>Recently, nanobubble technology is increasingly applied in wastewater treatment. However, the production of ozone nanobubbles (O₃/NBs) and their applications for degradation of toxic and recalcitrant organic pollutants in water with large scale are quite limited and remain to be enlightened. Here, we report the production of O₃/NBs from a nanobubble generator combined with an ozone generator, and their application for removing Direct Blue 71 (DB-71) and Methylene Blue (MB) dyes in a 60 L tank. Different characteristics of the generated O₃/NBs were measured while different parameters impacting the degradation of these cationic and anionic dyes were systematically examined. Kinetics of the degradation processes and mineralization levels for each pollutant were also clarified. The generated O₃/NBs presented extremely high DO (45 ± 2.0 mg/L) and ORP (1160 ± 54 mV), which were stable for at least 20 min. O₃/NBs exhibited a unimodal particle distribution with an average diameter of about 140 nm, and a number concentration of 8.3 × 10⁷ particles/mL. Under optimal conditions, 100% of DB-71 (30 mg/L) were removed and mineraized within 16 min while 100% of MB (10 mg/L) were removed and over 58% of MB (30 mg/L) were mineralized to form non-toxic products. O₃/NBs based oxidation process is very effective for organic dye degradation with high loading, occurring much faster than other advanced oxidation processes. The current work provides an effective and promising approach for generating the O₃/NBs presenting high efficiency, easy operation, and high potential of scalable applications in wastewater treatment.</p>","PeriodicalId":545,"journal":{"name":"Environmental Science and Pollution Research","volume":" ","pages":""},"PeriodicalIF":5.8,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144582771","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}

{"title":"Influences of regional and trans-regional anthropogenic emissions on meteorology and cloud properties over western India assessed using WRF-Chem model.","authors":"Shubham Dhaka, Shipra Lakshmi, Aditya Vaishya, Narendra Ojha, Andrea Pozzer, Tabish Ansari, Paushali Deb, Amit Sharma","doi":"10.1007/s11356-025-36717-5","DOIUrl":"https://doi.org/10.1007/s11356-025-36717-5","url":null,"abstract":"<p><p>Aerosols significantly influence meteorology and cloud properties over Indian region, nevertheless, high-resolution modeling studies required for addressing mitigation strategies have remained few. This is particularly the case for western India, a landmass adjoining global hotspot of enhanced aerosol loading - the Indo-Gangetic Plain (IGP) and strong dust source - the Thar desert. In this study, with the aid of high-resolution regional modeling we quantify and differentiate the impact of regional versus trans-regional anthropogenic aerosols on the meteorology and cloud properties over western India. The numerical simulations are performed for four months (January, April, August and November) representing contrasting seasons (winter, pre-monsoon, monsoon and post-monsoon) for the year 2019. Model results are seen to be in good agreement with the IMDAA and ERA5 reanalysis, satellite (CERES) data and radiosonde observations across different seasons. Interestingly, the sensitivity simulations reveal equal (or higher) trans-regional anthropogenic influence on the meteorology and cloud properties over western India when compared to the regional influence. Regional and trans-regional emissions combined reduce net surface-reaching shortwave radiation by up to 42 W/m² across all seasons. Individually, regional and trans-regional emissions reduce net surface-reaching shortwave radiation by up to 23 and 30 W/m² respectively across seasons. Regional and trans-regional emissions combined typically reduce near-surface (2m) temperature by up to ~ 0.6 K across all seasons. Regional emissions reduce near-surface (2m) temperature across all seasons by up to ~ 0.2 K. Trans-regional emissions also tend to lower 2m temperature by up to ~ 0.4 K except during the monsoon when some areas experience a temperature enhancement of up to 0.1 K. Strikingly, regional as well as trans-regional emissions enhance the near-surface temperature over coastal areas and the Arabian Sea during winter and post-monsoon. In line with change in temperature, aerosols tend to suppress the boundary layer height in winter and post-monsoon, which enhance near surface aerosol concentration. The trans-regional emissions lead to increase in cloud droplet number concentration and thereby the cloud optical thickness in the monsoon. In addition, a reduction in accumulated monthly precipitation by up to 37 mm, mainly due to trans-regional emissions, could exacerbate water resource challenges in the already water-stressed region of western India. Our study highlights a large role of trans-regional emissions in influencing the regional climate over western India and emphasizes the need for a coordinated mitigation approach.</p>","PeriodicalId":545,"journal":{"name":"Environmental Science and Pollution Research","volume":" ","pages":""},"PeriodicalIF":5.8,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144582768","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}

{"title":"Cadmium and zinc sorption and desorption in soil: the impact of humic-fulvic acids, Bacillus sp., insect frass, and soil aging.","authors":"Aspasia Grammenou, Georgios Thalassinos, Spyridon A Petropoulos, Vasileios Antoniadis","doi":"10.1007/s11356-025-36699-4","DOIUrl":"https://doi.org/10.1007/s11356-025-36699-4","url":null,"abstract":"<p><p>The sorption and desorption of Cd and Zn were investigated in a soil treated and incubated over a period of 30 days with various innovative amendments (the biostimulants humic and fulvic acids (HFA), Bacillus sp. (BAC), as well as insect frass (FR), and their combination (FR + HFA and FR + BAC)). This is a novel attempt to study the chemical behavior of the two toxic metals induced by the tested materials-a work that is in high want in the literature. The batch sorption test of Cd and Zn was conducted in the beginning and at the end of the incubation period in competitive systems. We found a significant increase in Cd sorption over time at FR and BAC, as recorded in the distribution coefficient (K_d-50), with values increasing from 143.70 to 184.98 L kg^-1 and from 144.11 to 196.70 L kg^-1, respectively. Zn sorption enhanced at FR, with K_d-50 values rising from 940.09 to 1310.64 L kg^-1. Added frass caused an increase in Cd and Zn sorption relative to the unamended control, but only in day 30, probably due to the added ion exchange and the presence of available organic matter-bound retention sites that contributed to the soil matrix after soil aging over time. Desorption was enhanced for Cd at FR and FR + BAC relative to the control (5.74% and 6.26% vs. 2.08%, respectively), but the fact that no further increase was observed over time is rather promising. We conclude that frass, alone or co-amended with the tested biostimulants, can positively affect metal retention, reducing metal mobility and bioavailability, and thus preserving soil health and environmental safety.</p>","PeriodicalId":545,"journal":{"name":"Environmental Science and Pollution Research","volume":" ","pages":""},"PeriodicalIF":5.8,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144582767","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}

{"title":"Study on the adsorption of malachite green from aqueous solutions using activated carbon prepared from Corallocarpus epigaeus.","authors":"Ramachandran Jothimani, Mariappan Santhi","doi":"10.1007/s11356-025-36710-y","DOIUrl":"https://doi.org/10.1007/s11356-025-36710-y","url":null,"abstract":"<p><p>This study explores the preparation and characterization of activated carbon (AC) derived from Corallocarpus epigaeus through sulfuric acid activation for the removal of malachite green (MG) dye from aqueous solutions. X-ray diffraction (XRD) analysis confirmed the amorphous nature of AC, contributing to its enhanced adsorption properties. Brunauer-Emmett-Teller (BET) analysis revealed a mesoporous structure with a specific surface area of 22.976 m²/g, indicating its potential for dye removal. Adsorption experiments were conducted under varying conditions, including initial pH, adsorbent dosage, dye concentration, and co-ion presence. The highest MG removal efficiency was achieved with 100 mg of AC. Adsorption data were well described by Langmuir, Freundlich, Tempkin, D-R, Liu, Redlich-Peterson isotherm models, suggesting a combination of monolayer adsorption and heterogeneous surface interactions. Optimal dye removal occurred under acidic conditions, likely due to electrostatic interactions between the AC surface and MG molecules. The pseudo-second-order equation was best suited for the adsorption data indicating chemisorption. Temperature studies demonstrated increased adsorption efficiency with rising temperature, with equilibrium achieved within 90-160 min. These findings highlight Corallocarpus epigaeus-derived AC as a promising, cost-effective adsorbent for synthetic dye removal from wastewater, with potential scalability for industrial applications.</p>","PeriodicalId":545,"journal":{"name":"Environmental Science and Pollution Research","volume":" ","pages":""},"PeriodicalIF":5.8,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144582772","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}

{"title":"Use of microwaves to dry sludge from drinking water treatment plants (DWTPs): gas emission and chemical/microbiological/ecotoxicological characteristics of sludge extracts.","authors":"Vinicius J Silva, Cleder A Somensi, Leandro M Salgado-Alves, Cristiane V Tagliari-Corrêa, Uberson B Rossa, Marcelo Poyer-Radetski, Felipe A Cassini, Bianca Coelho-Machado, Claudemir M Radetski, Sylvie Cotelle","doi":"10.1007/s11356-025-36714-8","DOIUrl":"https://doi.org/10.1007/s11356-025-36714-8","url":null,"abstract":"<p><p>The quality of sludge from drinking water treatment plants (DWTPs) depends not only on its origin but also on the specific treatment processes applied within the plant. Drying is a crucial step in sludge management, particularly when sludge must be transported or repurposed. Microwave (MW) drying has emerged as a technically and economically viable method for this purpose; however, its environmental impacts (including potential atmospheric emissions and the ecotoxicity of the resulting dried sludge) require thorough evaluation. This study assessed atmospheric emissions generated during microwave drying of sludge from water purification processes and compared the ecotoxicity of wet and dried sludge using various test organisms, including worms, bacteria, microorganisms, and Daphnia magna. No significant emissions of toxic gases such as SO₂, NO₂, or volatile organic compounds (VOCs) were detected during the MW drying process. Moreover, MW treatment effectively sanitized the sludge. Toxicity tests revealed that fresh sludge extracts were more harmful to Daphnia magna and Aliivibrio fischeri than extracts from dried sludge. These findings indicate that microwave drying not only reduces sludge volume but also decreases its ecotoxicity and pathogenic potential, which are critical factors for sustainable sludge management and environmental protection.</p>","PeriodicalId":545,"journal":{"name":"Environmental Science and Pollution Research","volume":" ","pages":""},"PeriodicalIF":5.8,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144582773","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}

{"title":"Physicochemical, microbial, and microbiome dynamics in winery waste composting.","authors":"Gregoria Mitropoulou, Ioanna Karapantzou, Ioanna Prapa, Dimitra Papanikolaou, Vasileios Charovas, Yiannis Kourkoutas","doi":"10.1007/s11356-025-36687-8","DOIUrl":"https://doi.org/10.1007/s11356-025-36687-8","url":null,"abstract":"<p><p>Compared to more extensively studied composting substrates like food waste or animal manure, winery waste presents unique challenges and opportunities. Its high content of lignin, cellulose, and polyphenolic compounds demands specific microbial consortia for efficient degradation and can potentially inhibit microbial activity if not properly balanced. In the present study, analysis of winery waste composting that combines traditional microbial enumeration with high-resolution microbiome profiling, an approach rarely applied to this type of agro-industrial residue, was implemented. Moreover, a practical proof-of-concept study, for using the composted product as a partial substrate replacement in grapevine cultivation, closing the loop in vineyard waste management, was conducted. Key parameters, such as moisture content, pH, temperature, conductivity, and C/N ratio were monitored, over a 60-day period, along with changes in enzymatic activity and shifts in microbial populations, indicating dynamic microbial activity. At the end of the process, a reduction in the carbon-to-nitrogen (C/N) ratio was observed, pH was stabilized to neutral values, and dehydrogenases activity was notably decreased. Microbiome analysis revealed eight bacterial and six fungal phyla. Acidobacteria, Armatimonadetes, Bacteroidetes, Candidatus Saccharibacteria, Chloroflexi, Cyanobacteria, Planctomycetes were identified. The Ascomycota, Basidiomycota, Chytridiomycota, Entomophthoromycota, Glomeromycota, and Mucoromycota fungal phyla were also detected. The compost exhibited no phytotoxicity and supported grapevine growth comparable to commercial substrates. Winery waste microbial composting led to stable biofertilizer production, evidenced by physicochemical stability, lack of phytotoxicity, and effectiveness in promoting grapevine growth suggesting the potential of composting as a sustainable waste management solution in the winemaking industry.</p>","PeriodicalId":545,"journal":{"name":"Environmental Science and Pollution Research","volume":" ","pages":""},"PeriodicalIF":5.8,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144582770","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}

{"title":"Assessing groundwater pollution using advanced statistical techniques and pollution indices near a coal fly ash dump in parts of Oji-river, Nigeria.","authors":"Chinyere Caroline Amadi, Christopher Osita Okeke, Samuel Onyekachi Onyekuru, Chikwendu Njoku Okereke, Obinna Chigoziem Akakuru","doi":"10.1007/s11356-025-36672-1","DOIUrl":"https://doi.org/10.1007/s11356-025-36672-1","url":null,"abstract":"<p><p>Advanced statistical methods (Pearson correlation matrix, principal component analysis, and hierarchical cluster analysis), pollution indices [pollution load index (PLI), contamination factor (CF), Nemerow integrated pollution index (NIPI), potential ecological risk index (PERi)], and regression model were utilized to evaluate groundwater quality around an abandoned coal fly ash disposal site. These methods can uncover hidden patterns and provide a more robust understanding of the pollution sources. Groundwater samples were collected and analyzed for physicochemical, heavy metals, and metallic elements using standard methods. The Pearson correlation matrix showed weak negative and strong positive correlation for groundwater samples. Strong positive correlations between groundwater and coal fly ash suggest similar anthropogenic associations and positive influence from CFA on groundwater resources. Hierarchical cluster analysis showed substantial similarities among elements. Principal component analysis showed a significant contribution with a positive correlation in PC1, PC2, and PC3. PLI values were > 1, which means the groundwater samples were polluted; CF showed moderate to significant pollution for Hg, Cd, Pb, Cu, and Fe, while As and zinc showed low contamination on groundwater samples. NIPI showed that 90% of samples had slight to serious pollution. The PERi result showed that Mg, Zn, Cu, and Hg posed low risk while Cd, Pb, and As posed moderate to very high risk. The relationship between PLI, NIPI, and PERi showed that PERi is significantly correlated with PLI and NIPI at < 0.5 significance level with a high positive correlation coefficient of 0.809 and 0.785, respectively, suggesting that similar sources of anthropogenic activities may have influenced the observed pollution level in the study area.</p>","PeriodicalId":545,"journal":{"name":"Environmental Science and Pollution Research","volume":" ","pages":""},"PeriodicalIF":5.8,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144582766","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}

{"title":"Lactone-derived biostimulants enhance QQ-mediated biofouling mitigation in membrane bioreactors.","authors":"Xinjiao Dong, Xiaoyu Wang, Xiaohui Chen, Yaru Li, Ruixue Yang, Shimei Ge","doi":"10.1007/s11356-025-36720-w","DOIUrl":"https://doi.org/10.1007/s11356-025-36720-w","url":null,"abstract":"<p><p>Quorum quenching (QQ) is regarded as an effective strategy for mitigating membrane biofouling in membrane bioreactors (MBRs), as it can disrupt quorum sensing (QS)-mediated biofilm formation-a key contributor to biofouling. QQ bacteria achieve this by degrading QS molecules, typically N-acylated homoserine lactones (AHLs), thereby neutralizing the QS process. The potential to enhance QQ-based biofouling mitigation through biostimulants is promising but remains underexplored. This study investigated the effects of four potential biostimulants - γ-caprolactone (GCL), γ-heptalactone (GHL), 6-caprolactone, and acetanilide - on the QQ bacterial strain Stentrophomonas Y6 in an MBR system. Among the tested compounds, GCL (10 mg/L) and GHL (20 mg/L) significantly stimulated strain Y6, enhancing its ability to reduce the bioreactor's transmembrane pressure (TMP) from 30 kPa to an average of 13 kPa. In contrast, 6-caprolactone and acetanilide showed no noticeable effect on Y6. The observed biostimulatory effects of GCL and GHL may be attributed to their ring structures, which resemble those of AHLs and are absent in 6-caprolactone and acetanilide. These findings provide valuable insights into the application of QQ bacteria and biostimulants in MBR systems to combat membrane biofouling.</p>","PeriodicalId":545,"journal":{"name":"Environmental Science and Pollution Research","volume":" ","pages":""},"PeriodicalIF":5.8,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144574636","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}