International Biodeterioration & Biodegradation最新文献

{"title":"Hydrodynamic modelling of biofilm detachment via the Immersed Boundary Method","authors":"Jiankun Wang ,&nbsp;Yumeng Fu ,&nbsp;Jin Wu ,&nbsp;Jin Li ,&nbsp;Xiaoling Wang","doi":"10.1016/j.ibiod.2025.106245","DOIUrl":"10.1016/j.ibiod.2025.106245","url":null,"abstract":"<div><div>Biofilm detachment under fluid shear stress is a critical yet poorly understood phenomenon in biomedical and environmental systems. This study develops a 2D biofilm detachment model using IB2d within the Immersed Boundary Method (IBM) framework. By discretizing the biofilm into small units composed of elastic elements and connecting them through elastic/viscoelastic components in our 2D simulations, we dynamically model fluid-structure interactions. The strain threshold fracture criterion was experimentally calibrated and used to simulate biofilm detachment. Numerical simulations in straight microchannels reveal the existence of a critical detachment modulus in elastic biofilm systems within our model, which varies depending on the initial biofilm configuration. Specifically, the critical detachment modulus of semi-circular biofilms is lower than that of rectangular biofilms, while biofilms with parallel units exhibit a lower critical detachment modulus compared to those with randomly distributed units in our setup. Mechanical analysis further demonstrates that the parallel arrangement of units optimizes the stress transmission pathway, enhancing biofilm structural integrity in flow fields within our 2D simulations. Fluid dynamics studies indicate that fluid shear forces play a decisive role in biofilm structural disruption, with complete detachment occurring within seconds at high flow rates (e.g., 97 % detachment within 3 s at <em>u</em>_<em>Max</em> = 1 × 10⁻³ m/s). Viscoelastic analysis reveals that low-viscosity biofilms fail to effectively aggregate units, whereas high-viscosity biofilms behave similarly to those with elastic unit connections in our 2D model. This work bridges micro-mechanics and macro-detachment behavior in a two-dimensional context, offering a predictive tool for biofilm management strategies.</div></div>","PeriodicalId":13643,"journal":{"name":"International Biodeterioration & Biodegradation","volume":"207 ","pages":"Article 106245"},"PeriodicalIF":4.1,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145516611","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":"Long-term nitrogen removal through sludge augmentation in biochar-based constructed wetlands treating low C/N ratio wastewater","authors":"Deepti Negi ,&nbsp;Punyasloke Bhadury ,&nbsp;Achlesh Daverey","doi":"10.1016/j.ibiod.2025.106244","DOIUrl":"10.1016/j.ibiod.2025.106244","url":null,"abstract":"<div><div>Efficient nitrogen (N) removal from low carbon-to-nitrogen (C/N) ratio wastewater remains a major challenge. This study evaluates the effect of sludge amendment [anaerobic (AnS) or activated sludge (AS)] on the long-term (227 days) performance of biochar-integrated vertical flow constructed wetlands (VFCWs) for the treatment of simulated low COD/N ratio (3.6 and 2) wastewater. TN removal efficiencies ranged from 30.59 to 94.97% in Phase I and 50.62–90.97% in Phase II, with the maximum removal observed in AS-inoculated CWs. Sludge addition enhanced N removal, with 26.77–50.96% of N remaining unaccounted, likely reflecting microbial transformations, gaseous emissions and other N losses. The 16S rRNA sequencing based metabarcoding approach revealed the enrichment of anammox bacteria (<em>Candidatus Ku</em><em>e</em><em>nenia</em>), particularly in AS (0.016–0.021%) added CWs. The coexistence of nitrifiers (<em>Nitrosospira</em>, <em>Nitrospira</em>), heterotrophic and aerobic denitrifiers (<em>Pseudomonas, Thauera, Bacillus</em>), nitrate reducing bacteria (<em>Clostridium, Enterobacter</em>) and sulfur oxidizing bacteria (<em>Halothiobacillus, Thiobacillus, Thiothrix</em>) in treatment layer (sand + biochar) reflects the interplay of multiple N transformation processes in the VFCWs. Biochar facilitated microbial colonization and enhanced redox stratification, thereby supporting these processes. Overall, sludge augmentation in biochar integrated VFCWs significantly improved N removal and altered dominant N transformation pathways, offering valuable insights for optimizing CWs treating low C/N ratio wastewater.</div></div>","PeriodicalId":13643,"journal":{"name":"International Biodeterioration & Biodegradation","volume":"207 ","pages":"Article 106244"},"PeriodicalIF":4.1,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145516703","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":"Enhanced stability of bacterial co-occurrence networks to biochar amendment reduces soil carbon mineralization in permafrost-affected soils","authors":"Yufei Wu ,&nbsp;Ziwei Jiang ,&nbsp;Liang Ma ,&nbsp;Xiaodong Wu ,&nbsp;Qian Lu ,&nbsp;Shuying Zang","doi":"10.1016/j.ibiod.2025.106224","DOIUrl":"10.1016/j.ibiod.2025.106224","url":null,"abstract":"<div><div>Biochar amendment to soil is regarded as a promising approach to enhance soil carbon sequestration in agroforestry ecosystems. However, the effects of biochar on the mineralization of soil organic carbon (SOC) in permafrost-affected forest soils and their regulating mechanisms remain unknown. Here, humus layer soil samples from a permafrost-affected Larix gmelinii forest were incubated with biochar additions of CK (no biochar), 2 % (BC2), 4 % (BC4), and 8 % (BC8). Biochar reduced SOC mineralization rates by 4.72 %–7.02 %, with concurrent increases in soil total organic carbon (8.8 %–28.8 %) and dissolved organic carbon (1.5–3.4 times). Soil substrates (NH₄⁺-N, pH, cation exchange capacity, electrical conductivity) and enzyme activities (dehydrogenase, polyphenol oxidase, urease) followed similar trends. Bacterial co-occurrence networks exhibited enhanced complexity and stability (e.g., network size, connectivity, modules, keystone species), with community assembly shifting from deterministic toward stochastic processes. The partial least squares structural equation modeling revealed that biochar might mitigate the SOC mineralization by reducing microbial activity through enhanced bacterial synergistic effects. These results highlight the importance of incorporating wildfire-produced biochar into the projections of permafrost carbon cycle.</div></div>","PeriodicalId":13643,"journal":{"name":"International Biodeterioration & Biodegradation","volume":"207 ","pages":"Article 106224"},"PeriodicalIF":4.1,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145270882","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":"Thermophilic-vermicomposting enhances nitrogen retention and reduces greenhouse gas emissions via microbial gene regulation","authors":"Guiling Zheng ,&nbsp;Xiaoxia Hao ,&nbsp;Binyan Hong ,&nbsp;Dongmei Jiang ,&nbsp;Hongxi Qian ,&nbsp;Lin Bai","doi":"10.1016/j.ibiod.2025.106231","DOIUrl":"10.1016/j.ibiod.2025.106231","url":null,"abstract":"<div><div>Against the backdrop of increasing concern regarding nitrogen (N) loss and greenhouse gas (GHG) emissions from livestock operations, this study evaluated the efficacy of an integrated thermophilic-vermicomposting system for the treatment of pig manure. Compared with conventional thermophilic composting (AC) and single vermicomposting (V), the combined thermophilic–vermicomposting (CV) approach markedly improved compost quality. Specifically, total nitrogen (TN), germination index (GI), and humification index (HIX) increased by 27 % and 7 %, 44 % and 26 %, and 51 % and 17 %, respectively. It also promoted the abundance of functional genes involved in nitrification (<em>amo</em>A, <em>amo</em>B), denitrification (<em>nir</em>S, etc.), and carbon cycling (<em>pcc</em>A, etc.). Furthermore, the CV process significantly increased ammonium nitrogen (NH₄⁺-N) and nitrate nitrogen (NO₃⁻-N) contents by 58.96 % and 1476 %, respectively, compared with AC, while effectively reducing carbon dioxide (CO₂), methane (CH₄), and ammonia (NH₃) emissions. These findings demonstrate that integrated thermophilic-vermicomposting is a promising strategy for sustainable livestock waste management, simultaneously improving compost maturity and reducing environmental impacts.</div></div>","PeriodicalId":13643,"journal":{"name":"International Biodeterioration & Biodegradation","volume":"207 ","pages":"Article 106231"},"PeriodicalIF":4.1,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145516706","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":"Biodegradation and detoxification of cephalexin by Bacillus wiedmannii RM5: Pathways, optimization, and safety assessment","authors":"Reihaneh Moridshahi,&nbsp;Zahra Etemadifar","doi":"10.1016/j.ibiod.2025.106230","DOIUrl":"10.1016/j.ibiod.2025.106230","url":null,"abstract":"<div><div>Cephalexin (CPX), a β-lactam antibiotic, is considered an emerging pollutant due to its incomplete removal in conventional treatment systems and its contribution to antimicrobial resistance. This study investigated a novel indigenous strain, <em>Bacillus wiedmannii RM5</em>, isolated from municipal activated sludge, which efficiently degraded CPX. Under optimized conditions (pH 6.5, 50 mg/L initial CPX, 60 h incubation), strain RM5 achieved 95.5 % CPX removal, as determined using OFAT and Box–Behnken design with RSM. The ddition of glucose significantly enhanced co-metabolism, leading to complete degradation within 36 h. The strain exhibited stable performance across a pH range of 6–9, temperatures of 30–45 °C, and CPX concentrations up to 400 mg/L, indicating its potential for application under real-world environmental conditions. LC–MS/MS analysis <strong>identified</strong> 13 intermediates, <strong>suggesting</strong> two concurrent enzymatic degradation pathways. These pathways involve β-lactamase-mediated ring cleavage, hydrolysis, and oxidation catalyzed by hydrolases and oxidases, leading to non-toxic mineral end products. MIC and MTT bioassays showed that, unlike untreated CPX, its degraded metabolites exhibited no antibacterial or cytotoxic activity. <em>Bacillus wiedmannii RM5</em> effectively degraded CPX, amoxicillin (AMX), and ampicillin (AMP) simultaneously across diverse environmental conditions, showcasing its broad-spectrum biodegradation <strong>potential</strong>. These findings highlight <em>Bacillus wiedmannii RM5</em> as a promising, safe, and effective bioremediation agent for removing β-lactam antibiotics from wastewater, offering a <strong>practical</strong> strategy to reduce pharmaceutical pollution and antibiotic resistance.</div></div>","PeriodicalId":13643,"journal":{"name":"International Biodeterioration & Biodegradation","volume":"207 ","pages":"Article 106230"},"PeriodicalIF":4.1,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145359648","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":"Cleaner aquaculture through bioremediation: Using Bacillus probiotics to reduce nitrogenous waste and enhance fish welfare in intensive Labeo rohita culture","authors":"Suraj Kumar ,&nbsp;Tanmoy Choudhury ,&nbsp;Supratim Malla ,&nbsp;Himadri Saha ,&nbsp;Dibyendu Kamilya ,&nbsp;Shivbhajan Chandravanshi ,&nbsp;Prasenjit Pal","doi":"10.1016/j.ibiod.2025.106252","DOIUrl":"10.1016/j.ibiod.2025.106252","url":null,"abstract":"<div><div>This study evaluated the bioremediation efficiency and health-promoting potential of three <em>Bacillus</em> probiotics- <em>Bacillus subtilis</em> COFCAU_BSP3, <em>B. velezensis</em> COF_AHE01, and <em>B. amyloliquefaciens</em> COFCAU_P1- by assessing their ability to remove ammonia-N and nitrite-N from simulated pond water and their effects on welfare indicators in <em>Labeo rohita</em> cultured under a high-stocking, no-water-exchange system. Among the tested strains, <em>B. subtilis</em> COFCAU_BSP3 exhibited the highest nitrogen removal capability, achieving up-to 74.47 % ammonia-N and 41.01 % nitrite-N removal at 1 × 10⁸ CFU/mL, and was therefore selected for subsequent <em>in vivo</em> evaluation. Tolerance assays indicated that this strain was resilient across a range of environmental conditions, performing optimally at pH 7.0 and 30 °C, and tolerating moderate levels of ammonia-N (up to 32 mg/L) and nitrite-N (optimal at 8 mg/L). Subsequently, a 30-day <em>in vivo</em> trial was conducted to assess the effects of <em>B. subtilis</em> COFCAU_BSP3 supplementation, administered at 10-day intervals, on <em>L. rohita</em> fingerlings. The probiotic treated group effectively reduced ammonia-N by 50 % and nitrite-N by 52.63 % while increasing nitrate-N levels by 1.9-fold, indicating enhanced nitrification. Treated fish showed improved innate immune responses (<em>p</em> &lt; 0.05), including elevated superoxide anion, myeloperoxidase, lysozyme, and antiprotease activities. Biochemical analysis revealed, reduced glucose levels and increased plasma protein and globulin concentrations in the blood. Additionally, gut enzymatic activity was enhanced, particularly protease (3.08 fold) and amylase (4.5 fold) activities. Gene expression analysis showed significant upregulation of <em>HSP70</em> (2.3 fold) and <em>TNF-α</em> (3 fold) on day 30, suggesting improved stress tolerance and immune activation. Overall, these findings highlight <em>B. subtilis</em> COFCAU_BSP3 as a promising water probiotic for sustainable aquaculture, offering potential benefits in water quality management, fish health, and system resilience under intensive culture conditions.</div></div>","PeriodicalId":13643,"journal":{"name":"International Biodeterioration & Biodegradation","volume":"207 ","pages":"Article 106252"},"PeriodicalIF":4.1,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145568461","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":"Nano-bioremediation of used engine oil using glycolipid-producing Pseudomonas azotoformans and Zinc–Selenium nanoparticles: A synergistic green approach","authors":"Kumar Kowsalya ,&nbsp;Irfan Ahmad ,&nbsp;Mohd Saeed ,&nbsp;Anahas Perianaika Matharasi Antonyraj ,&nbsp;Narayanaswamy Tamilselvan","doi":"10.1016/j.ibiod.2025.106248","DOIUrl":"10.1016/j.ibiod.2025.106248","url":null,"abstract":"<div><div>This study introduces a novel nano-bioremediation strategy integrating a glycolipid-type biosurfactant–producing bacterium, <em>Pseudomonas azotoformans</em> KMVKT08, with biosynthesized zinc–selenium (Zn–Se) nanoparticles for the efficient degradation of used engine oil. The glycolipid biosurfactant exhibited a high emulsification index (E₂₄ = 78 ± 2 %) and reduced surface tension to 28.6 ± 0.5 mN m⁻¹, significantly enhancing hydrocarbon solubilization and bioavailability. The Zn–Se nanoparticles, characterized by XRD, FT-IR, and TEM (average particle size 42 ± 5 nm), catalyzed oxidative reactions and generated reactive oxygen species (ROS) that facilitated hydrocarbon chain cleavage. The combined system achieved a 91.3 ± 2.1 % degradation efficiency, as quantified by GC–MS peak-area integration (p &lt; 0.05), transforming long-chain hydrocarbons such as octadecane and anthracene into low-molecular-weight fatty acids and alcohols. Enzymatic assays revealed significantly higher activities of monooxygenase (0.86 ± 0.04 U·mg⁻¹) and catechol 2,3-dioxygenase (0.73 ± 0.05 U·mg⁻¹) compared with treatments (p &lt; 0.05), confirming the enzyme-mediated oxidative mechanism. This synergistic integration of biosurfactant-mediated solubilization and nanoparticle-assisted catalytic oxidation represents a sustainable, potentially scalable, and environmentally benign approach for restoring hydrocarbon-contaminated soils and wastewater, marking a significant advancement in green bioremediation technology and providing a promising direction for future large-scale environmental applications. This green technology advances climate-resilient pollution management in alignment with SDG 9 (Industry, Innovation and Infrastructure) and SDG 13 (Climate Action).</div></div>","PeriodicalId":13643,"journal":{"name":"International Biodeterioration & Biodegradation","volume":"207 ","pages":"Article 106248"},"PeriodicalIF":4.1,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145614798","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":"Penicillin and streptomycin in ethanol mist against spore-forming Bacillus bacteria isolated from surfaces of historical objects","authors":"Anna Wawrzyk ,&nbsp;Natalia Pydyn ,&nbsp;Dorota Rybitwa ,&nbsp;Nel Jastrzębiowska ,&nbsp;Lilianna Szyk-Warszyńska ,&nbsp;Małgorzata Zimowska ,&nbsp;Jacek Gurgul ,&nbsp;Dagmara Zeljaś ,&nbsp;Filip Bielec","doi":"10.1016/j.ibiod.2025.106246","DOIUrl":"10.1016/j.ibiod.2025.106246","url":null,"abstract":"<div><div>The objective of the study was to investigate the antimicrobial efficacy of ethanol mist enriched with penicillin and/or streptomycin and to examine its effects on the surface properties of model and historical textile materials from the collections of the Auschwitz-Birkenau State Museum (ABSM) in Oświęcim (Poland). <em>Bacillus</em> bacteria, which inhabited historical textile objects in the ABSM, were inoculated onto samples of textiles. Then, penicillin and/or streptomycin suspended in water or ethanol were applied in the form of mist. Sensitivity of the bacterial strains to the antibiotics was tested with disk diffusion (vegetative forms) and agar imprint (spores) methods. After that, surface alterations were analysed using SEM, confocal microscopy and XPS techniques. Even though initial effectiveness of presented disinfection method was observed, both for cells and spores, it resulted only in a temporary inhibition of the growth of tested bacteria. Importantly, subsequent analyses revealed that this treatment did not induce any detectable alterations in the surface morphology or chemistry of the textile materials. The developed method of applying antibiotics together with ethanol mist to increase effectiveness of ethanol against spore-forming bacteria is non-destructive and preserves the original structural and chemical integrity of historical fabric. However, the method has a biostatic effect on spore-forming <em>Bacillus</em>, not biocidal, so the addition of tested antibiotics does not allow the desired effect to be achieved. Nevertheless, ethanol in the form of mist without additives is biocidally effective against a wide range of microorganisms.</div></div>","PeriodicalId":13643,"journal":{"name":"International Biodeterioration & Biodegradation","volume":"207 ","pages":"Article 106246"},"PeriodicalIF":4.1,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145516705","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":"Bacteria involved in plastic anaerobic degradation in marine sediments under nitrate and iron-reducing conditions","authors":"Jiannan Wang ,&nbsp;Renju Liu ,&nbsp;Sufang Zhao ,&nbsp;Zongze Shao","doi":"10.1016/j.ibiod.2025.106228","DOIUrl":"10.1016/j.ibiod.2025.106228","url":null,"abstract":"<div><div>Marine sediments are major sinks for microplastics, with concentrations significantly higher than in seawater. However, little is known about the biodegradation of plastic debris in oxygen-deficient sediments. In this study, we characterized the bacteria with the potential for anaerobic degradation of plastics in sediments sampled from the semi-closed Sansha Bay located in the Taiwan Strait. Using common polyhydrocarbon plastics—polyethylene (PE), polypropylene (PP), and polystyrene (PS)—as the sole carbon and energy sources, anaerobic degrading bacteria were enriched under nitrate-reducing and iron-reducing conditions. After incubation, bacterial community analysis based on 16S rRNA sequencing revealed that under iron-reducing conditions, norank_<em>Caulobacteraceae</em>, <em>Ralstonia</em>, <em>Shewanella</em>, and <em>Vibrio</em> were the most abundant core taxa, whereas <em>Shewanella</em> and <em>Vibrio</em> dominated nitrate-reducing communities across all plastic types. Co-occurrence network analysis further indicated that members of <em>Proteobacteria</em> and <em>Desulfobacterota</em> cooperatively contributed to plastic anaerobic degradation. At the genus level, <em>Vibrio</em> was identified as the most prominent keystone taxon alongside <em>Marinobacter</em>. Bacterial isolation and biodegradation assays confirmed <em>Vibrio alginolyticus</em> as an anaerobic degrader under nitrate-reducing conditions, capable of forming biofilms on PE, PP, and PS surfaces and inducing physicochemical deterioration. This study provides the first evidence of bacteria involved in anaerobic plastic degradation in marine environments, underscoring that this process may actively influence the fate of plastic debris and microplastics in marine sediments.</div></div>","PeriodicalId":13643,"journal":{"name":"International Biodeterioration & Biodegradation","volume":"207 ","pages":"Article 106228"},"PeriodicalIF":4.1,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145325856","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":"Rhizosphere phenolics by urban plants drive laccase-like oxidative conditions and selective degradation of phenolic/anilinic antibiotics","authors":"Zhimin Zhou ,&nbsp;Shuzhuang Wu ,&nbsp;Junchao Huang ,&nbsp;Yuxin Chen ,&nbsp;Yongpeng Li ,&nbsp;Baobao Cai ,&nbsp;Pengkang Yan ,&nbsp;Dionisio Zaldivar-Silva ,&nbsp;Shaojie Liu ,&nbsp;Weiyi Lv ,&nbsp;Bangxiao Zheng","doi":"10.1016/j.ibiod.2025.106243","DOIUrl":"10.1016/j.ibiod.2025.106243","url":null,"abstract":"<div><div>Antibiotics increasingly occur at urban root–soil–water interfaces, yet the proximate chemical driver of any in-situ dissipation remains unclear. We tested the hypothesis that phenolic root exudates establish laccase-like oxidative conditions that selectively shorten the persistence of phenolic or anilinic antibiotics. Using planted microcosms spanning a gradient in exudate phenolics, paired with complementary exudate assays with copper chelation and dephenolization, we quantified H₂O₂-free oxidative activity and first-order decay of tetracycline, sulfamethoxazole, and a recalcitrant comparator, carbamazepine. High-phenolic rhizospheres produced the strongest extracellular oxidation and yielded two-to fourfold shorter half-lives for tetracycline and sulfamethoxazole, whereas carbamazepine was unchanged. Across treatments, oxidative activity was strongly and inversely associated with half-life for the phenolic or anilinic antibiotics and a structural model linked phenolic exudation to oxidation and then to antibiotic persistence, explaining 76 % of the variance, while the same conditions coincided with lower abundances of resistance markers and higher bacterial evenness after two weeks. These findings verify the laccase-like rhizosphere mechanism and identify exudate chemistry as a practical lever for selective antibiotic dissipation and risk reduction in urban green infrastructures.</div></div>","PeriodicalId":13643,"journal":{"name":"International Biodeterioration & Biodegradation","volume":"207 ","pages":"Article 106243"},"PeriodicalIF":4.1,"publicationDate":"2026-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145516610","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}