International Biodeterioration & Biodegradation最新文献

{"title":"Dynamics of plastisphere microbial communities in mangrove sediments and their potential impact on N-cycling","authors":"Ruzhen Liu ,&nbsp;Zhichao Wang ,&nbsp;Minghuang Ling ,&nbsp;Kai Zhang ,&nbsp;Wei Xu ,&nbsp;Zhijie Xu ,&nbsp;Xiaomei Huang ,&nbsp;Ying Qiao ,&nbsp;Yu Luo ,&nbsp;Wenzhou Zhang ,&nbsp;Hans-Peter Grossart ,&nbsp;Zhuhua Luo","doi":"10.1016/j.ibiod.2024.105929","DOIUrl":"10.1016/j.ibiod.2024.105929","url":null,"abstract":"<div><div>Plastic pollution has emerged as a significant environmental issue in marine ecosystems. The prolonged presence of plastics in mangrove sediments can have a substantial impact on the carbon and nitrogen cycles of these vital environments. We conducted <em>in situ</em> burial exposure experiments to assess microbial colonization and activity on biodegradable and refractory plastics in mangrove sediments, with a focus on their influence on nitrogen cycling. Variations in microbial community succession and metabolic processes on plastic surfaces were primarily determined by the type of plastic polymer. After 60 days of exposure, the abundance of denitrifying bacteria and denitrification-related genes (<em>narG</em>, <em>nirS</em>, <em>nosZ</em>, and <em>norB</em>) was higher on biodegradable plastics. After 360 days, however, a high abundance of ammonia-oxidizing archaea and nitrification-related genes (<em>pmoA-amoA</em>, <em>pmoB-amoB</em>, <em>pmoC-amoC</em>, and <em>hao</em>) were found on refractory plastics. Consequently, plastic pollution in mangrove sediments could disrupt the nitrogen cycling equilibrium in these ecosystems, underscoring the critical necessity to regulate and alleviate the detrimental impacts of plastic pollution in crucial coastal areas.</div></div>","PeriodicalId":13643,"journal":{"name":"International Biodeterioration & Biodegradation","volume":"196 ","pages":"Article 105929"},"PeriodicalIF":4.1,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142322143","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":"Exploring the chemical profiling and insecticidal properties of essential oils from fresh and discarded lemon peels, Citrus limon against pulse beetle","authors":"Himanshi Gupta ,&nbsp;Prithvi Pal Singh ,&nbsp;S.G. Eswara Reddy","doi":"10.1016/j.ibiod.2024.105924","DOIUrl":"10.1016/j.ibiod.2024.105924","url":null,"abstract":"<div><p>Essential oil (EO) of <em>Citrus limon</em> fresh (LF) and lemon waste peel (LW) was extracted using the hydro distillation method. A total of 17 chemical constituents (97.02–97.26%) were identified using GC, GC-MS, and NMR techniques. Major monoterpene hydrocarbons including d-limonene (52.42–54.17%), <em>α</em>-terpineol (16.82–21.15%), <em>β</em>-pinene (6.74–9.15%) and <em>γ</em>-terpinene (2.16–3.59%) were further identified using ¹H and ¹³C NMR analysis. Furthermore, extracted EOs, their synergistic combinations and major constituent (d-limonene) were evaluated for fumigant toxicity, repellence, and ovipositional inhibitory (OI) potential using without food and with food conditions against pulse beetle, <em>Callosobruchus chinensis</em> and <em>Callosobruchus maculatus.</em> d-limonene was found to be most effective against <em>C. chinensis</em> and <em>C. maculatus</em> followed by LW oil in all the evaluated assays. EO of LW was found more effective against <em>C. chinensis</em> (LC₅₀ = 2899.11 μl L⁻¹) without food after 96 h than lemon fresh. Among synergistic combinations, LW and LF at 3:1 ratio without food reported more effective to <em>C. chinensis</em> (LC₅₀ = 277.85 μl L⁻¹) and <em>C. maculatus</em> (LC₅₀ = 322.38 μl L⁻¹) without food after 96 h. In repellent assay, EO of LW also displayed higher repellent to both species (RC₅₀ = 430.71 to 525.56 and μl L⁻¹). EO of LW showed higher OI (50.14 ± 3.09%) against <em>C. chinensis</em> at higher concentration after 24 h. EOs of LF and LW also inhibited glutathione -S-transferase and acetylcholine esterase activity in <em>C. chinensis</em> and <em>C. maculatus.</em></p></div>","PeriodicalId":13643,"journal":{"name":"International Biodeterioration & Biodegradation","volume":"196 ","pages":"Article 105924"},"PeriodicalIF":4.1,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0964830524001951/pdfft?md5=39d31776ef419da1b48350dfda38dd6f&pid=1-s2.0-S0964830524001951-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142274853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Methyl red dye decolourization by the photosynthetic bacteria, Rhodopseudomonas palustris and Afifella marina","authors":"Suhailar Sma-Air,&nbsp;Raymond J. Ritchie","doi":"10.1016/j.ibiod.2024.105915","DOIUrl":"10.1016/j.ibiod.2024.105915","url":null,"abstract":"<div><p>Anoxygenic photosynthetic bacteria are common inhabitants of wastewater: we found that <em>Rhodopseudomonas palustris</em> and <em>Afifella marina</em> in eutrophic conditions only partially degraded the azo dye (50 mmol m⁻³), Methyl Red, but completely degraded it under specially defined conditions. The azo dye is potentially a source of both carbon and fixed nitrogen. <em>Rhodopseudomonas palustris</em> and <em>Afifella marina</em> can live heterotrophically, photoheterotrophically or photoautotrophically under anoxic conditions where they can fix N₂ if no organic nitrogen or NH₃ is available. If organic carbon sources are available or if NH₃ is present, the cells again only partially catabolised Methyl Red. In the absence of no alternative organic carbon sources and no NH₃, the cells almost completely spectroscopically decolourised Methyl Red in 4 days. In sewage ponds the ready availability of alternative organic carbon and NH₃ would result in <em>only partial</em> removal of Methyl Red. <em>Rhodopseudomonas</em> cells responded to the availability of Methyl Red in N-free media, by increasing both Optimum irradiance and maximum ETR (E_opt 276.3 μmol quanta m⁻² s⁻¹; ETR_max 391.4 μmol e⁻ g⁻¹ BChl <em>a</em> s⁻¹) compared to control cells incubated in PM media with no organic carbon source and no fixed N-source (E_opt 115.2 μmol quanta m⁻² s⁻¹; ETR_max = 153.0 μmol e⁻ g⁻¹ BChl <em>a</em> s⁻¹. If no alternative C or N sources are available, <em>Rhodopseudomonas</em> embedded in alginate biobeads will completely and repeatedly break down Methyl Red. The marine <em>Afifella</em> readily broke down Methyl Red but again breakdown was only complete if alternative carbon and no fixed nitrogen sources were available. The toxicity of the breakdown products produced by photosynthetic bacteria from azo-dyes needs to be followed up. Photosynthetic bacterial-alginate biobeads have long lifetimes (<em>Rhodopseudomonas</em> ≈ 2 months, <em>Afifella</em> &gt; 6 months) making them of great biotechnological potential.</p></div>","PeriodicalId":13643,"journal":{"name":"International Biodeterioration & Biodegradation","volume":"196 ","pages":"Article 105915"},"PeriodicalIF":4.1,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0964830524001860/pdfft?md5=06c5f4b76f475cb3327a1c687a538510&pid=1-s2.0-S0964830524001860-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142241095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multidimensional insights into biofilm ecology and function of a denitrifying anaerobic membrane biofilm reactor with limited hydrogen supply","authors":"Yuanyuan Zhang ,&nbsp;Jingjuan Yang ,&nbsp;Minmin Jiang ,&nbsp;Xiangmin Li ,&nbsp;Yuchao Chen ,&nbsp;Xingru Dai ,&nbsp;Qiaoyan Wei ,&nbsp;Mei Chen ,&nbsp;Xuehong Zhang ,&nbsp;Junjian Zheng","doi":"10.1016/j.ibiod.2024.105927","DOIUrl":"10.1016/j.ibiod.2024.105927","url":null,"abstract":"<div><p>The anaerobic membrane biofilm reactor (An-MBfR) using dead-end hollow fiber membranes (HFMs) inevitably suffers the limited supply of gaseous electron donors to biofilms, as a result of the back-diffusion of inert gases. The microbial mechanisms, underlying the biofilm formation and decontamination performance of the An-MBfR disadvantaged by limited active gas supply, are still obscure in the literature. Herein, we investigated the evolution laws of biofilm ecology and function in a denitrifying H₂-based An-MBfR, from a multidimensional perspective. Results showed that despite the operating parameters of the reactor were set at the optimal values, the ununiform biofilms were developed on the HFMs, exhibiting a variation trend that with increasing distance from the near-gas end, the thickness and biomass of biofilms were decreased accompanied by their morphological change from the compacted to loosened. As hydrogenotrophic denitrifying bacteria (DNB) suffered limited H₂ supply to the biofilm, they could not produce abundant extracellular polymeric substances (EPS) and result in a high ratio of protein/polysaccharide (PN/PS) ratio in the EPS to facilitate the biofilm growth; their proliferation slowed down, especially in the outer layer of the biofilm at the far-gas end. The propagation of heterotrophic DNB was more active in the outer layer rather than inner layer of biofilms, ascribed to the abundant presence of PN and PS as well as increased NO₃⁻ availability. The variation trends in abundance of functional genes pertinent to the biofilm formation and NO₃⁻ reduction coincided well with the evolution laws of biofilm characteristics and DNB distribution. The findings provided mechanistic insights into the biofilm structure and microbial interaction in the denitrifying An-MBfR.</p></div>","PeriodicalId":13643,"journal":{"name":"International Biodeterioration & Biodegradation","volume":"196 ","pages":"Article 105927"},"PeriodicalIF":4.1,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0964830524001987/pdfft?md5=54148dc0d1e10eaf7599a78e5d68df1e&pid=1-s2.0-S0964830524001987-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142241094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fluid depth-dependent biofilm characteristics and their influence on sulfate-reducing bacteria-induced corrosion of carbon steel","authors":"Hongshou Huang,&nbsp;Albert Juhasz,&nbsp;Nikki Stanford","doi":"10.1016/j.ibiod.2024.105925","DOIUrl":"10.1016/j.ibiod.2024.105925","url":null,"abstract":"<div><p>This study investigates the response of biofilm characteristics to variations in fluid depth and their influence on the corrosion behavior of carbon steel (C1020) under low-flow fluid conditions, utilizing <em>Desulfovibrio vulgaris</em>. The experiments were conducted in an anaerobic chamber at 30 °C, utilizing modified Baar's medium as the testing medium. The findings reveal that fluid depth significantly impacts biofilm-corrosion product composite formation, with deeper depths promoting thicker and more heterogeneous biofilm-corrosion product layer compared to shallower depths, where a thinner and more uniform biofilm-corrosion product layer is observed. Moreover, the characteristics of initially attached biofilms was verified as the primary factor affecting subsequent corrosion behavior during prolonged exposure. Corrosion analysis reveals that greater fluid depth leads to increased weight loss (91 ± 13.2 mg/cm²) and deeper pit depths (540 ± 69 μm), surpassing those observed in shallower test media (21 ± 2.3 mg/cm² and 105 ± 17 μm) after 28 days of exposure. The corrosion products within the biofilm were predominantly FeS and Fe₃(PO₄)₂·8H₂O. A direct relationship was observed between the thickness of this biofilm-corrosion product layer and the progression of pit depth, suggesting a strong correlation between carbon steel corrosion and biofilm development in limited fluid depths (e.g., 5–15 mm). Furthermore, a significant association between the deepest pits (average) and the number of sessile cells within the biofilm underscores the pivotal role of sessile cell numbers in carbon steel corrosion.</p></div>","PeriodicalId":13643,"journal":{"name":"International Biodeterioration & Biodegradation","volume":"196 ","pages":"Article 105925"},"PeriodicalIF":4.1,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0964830524001963/pdfft?md5=869dbb512d783f35a241c609a40fc254&pid=1-s2.0-S0964830524001963-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142241093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced degradation performance toward para-nitrophenol of adapted immobilized microbial community on coconut coir","authors":"Bao-Ngoc T. Le ,&nbsp;Van-Anh T. Nguyen ,&nbsp;Nguyen-Phuong Nguyen ,&nbsp;Hong-Nhung Nguyen ,&nbsp;Thanh-Truc H. Phan ,&nbsp;Thuy-Huong Nguyen ,&nbsp;Thuy-Phuong T. Pham ,&nbsp;Hoang-Duy P. Nguyen","doi":"10.1016/j.ibiod.2024.105923","DOIUrl":"10.1016/j.ibiod.2024.105923","url":null,"abstract":"<div><p>Nitrophenol pollutants, including para-nitrophenol (p-NP), are known for their harmful environmental impact due to their persistence, toxicity, and widespread distribution in water sources. While biodegradation generally offers a more effective removal of organic pollutants compared to chemical or physical methods, degrading persistent and toxic compounds like p-NP remains challenging. In this study, a microbial community derived from food processing wastewater was immobilized on coconut coir and adapted to p-NP before being employed for p-NP biodegradation. The spectroscopic analysis demonstrates the effective biodegradation performance of the adapted microbial community, achieving 99% degradation of 50 mg L⁻¹ p-NP in 38 min and 250 mg L⁻¹ p-NP in 4.65 h. The degradation ability of immobilized cells was determined across a broad range of stirring speeds, temperatures, pH levels, and p-NP solution volumes. Complete mineralization of p-NP was confirmed by chemical oxygen demand (COD) measurements of the treated solution and in-situ CO₂ generation. Notably, the p-NP degradation performance of the adapted immobilized microbial community remained stable for the first 40 days, with only a slight decrease observed after 47 days of cold preservation at 4 °C. An average p-NP degradation rate of 0.75 mg L⁻¹ min⁻¹ was maintained over 54 consecutive runs. Significant alterations in microbial diversity were identified through 16S metabarcoding analysis. The unadapted microbial community comprised a diverse range of genera, while the adapted community showed reduced diversity with an enrichment of specific genera known for p-NP degradation, such as unidentified members of the Micrococcaceae family, <em>Paenarthrobacter</em> spp., and <em>Zoogloea</em> spp.</p></div>","PeriodicalId":13643,"journal":{"name":"International Biodeterioration & Biodegradation","volume":"196 ","pages":"Article 105923"},"PeriodicalIF":4.1,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S096483052400194X/pdfft?md5=0a0871fa0657b9c08110fbc53a67ea7e&pid=1-s2.0-S096483052400194X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142241155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In-situ remediation of contaminated groundwater by bioelectrochemical system: A review","authors":"Weiya Wang ,&nbsp;Jun Dong ,&nbsp;Haifeng Zhao","doi":"10.1016/j.ibiod.2024.105914","DOIUrl":"10.1016/j.ibiod.2024.105914","url":null,"abstract":"<div><p>Groundwater pollution is an important problem threatening the ecological environment and people's health, so it's very necessary to remedy the polluted groundwater. For the past few years, bioelectrochemical systems (BESs) have been widely used to remedy various polluted environments such as gas, water and solid. This is mainly attributed to following characteristics of BESs: (ⅰ) electrode can act as measureless electron acceptor/donor; (ⅱ) electrode surface can support the growth of microorganisms; (ⅲ) the electric field can stimulate naturally occurring microbial degradation activity; and (ⅳ) little or even no energy consumption. These properties enable BESs to degrade pollutants in an environmentally sustainable manner and improve the possibility of complete removal of pollutants. Therefore, this makes a lot of researchers choose to apply BESs to remediate polluted groundwater in situ. In order to fully understand BESs, this paper summarized from different aspects. Primarily, the remediation mechanism and main forms of BESs were described. Then, the application and research progress of BESs for the single and mixed pollutants removal in groundwater were reviewed. The principal variables affecting degradation performance were presented, including electrode potential, initial pollutant concentration, pH, carbon source and other process parameters and environmental conditions. Further, strategies to enhance the remediation performance of BESs were also discussed from the aspects of optimizing the system configuration, inoculating pre-enhanced microorganisms, adding redox medium and surfactant. Finally, the potential research direction of removing groundwater pollutants by BESs was proposed.</p></div>","PeriodicalId":13643,"journal":{"name":"International Biodeterioration & Biodegradation","volume":"196 ","pages":"Article 105914"},"PeriodicalIF":4.1,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0964830524001859/pdfft?md5=6b68be40a01b7921e72355fbde45d571&pid=1-s2.0-S0964830524001859-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142230762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Insights on optimizing landfill site selection inspired by co-fermentation of weathered coal and landfill leachate","authors":"Hongyu Guo ,&nbsp;Bo Song ,&nbsp;Ze Deng ,&nbsp;Linyong Chen ,&nbsp;Hengxing Ren ,&nbsp;Qiang Xu ,&nbsp;Xiaokai Xu","doi":"10.1016/j.ibiod.2024.105922","DOIUrl":"10.1016/j.ibiod.2024.105922","url":null,"abstract":"<div><p>To develop new methods for transforming waste resources such as landfill leachate and weathered coal into clean energy, this research analyzed the co-fermentation effect and internal mechanism of methane production through gas chromatography, three-dimensional fluorescence, inducive coupling and metagenomics techniques. Our findings revealed that landfill leachate addition drives more than 70% increase in weathered coal biomethane production. Anaerobic fermentation collectively increased the tryptophan content in liquid-phase biodegradation, with the highest proportion reaching up to 72%. <em>Paracoccus</em>, <em>Ralstonia</em>, <em>Aquamicrobium and</em> other major microorganisms were in the range of 9–32%. Contamination of heavy metal diversity resistance genes has impacted microflora composition, with specialized heavy metal resistance genes such as NreB, CopD, NreB, and MerP altering the influence of heavy metals on anaerobic fermentation. The combined anaerobic fermentation of landfill leachate and weathered coal has expanded clean waste utilization and has broad application prospects.</p></div>","PeriodicalId":13643,"journal":{"name":"International Biodeterioration & Biodegradation","volume":"196 ","pages":"Article 105922"},"PeriodicalIF":4.1,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0964830524001938/pdfft?md5=45c012d4c5ded1e3e8ede81c093f1263&pid=1-s2.0-S0964830524001938-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142173376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparing manuscript for submission and publication","authors":"Ji-Dong Gu","doi":"10.1016/j.ibiod.2024.105912","DOIUrl":"10.1016/j.ibiod.2024.105912","url":null,"abstract":"<div><div>Publication of scientific papers is an important requirement for many peoples from graduate students to all stages of scientists worldwide. As an important step, manuscript must pass the reviewing processes by editors and reviewers to allow the research output to be published, but the appearance of the submitted manuscripts can vary greatly, resulting in an immediate rejection without reviewing or poor reviewing results after passing the first round by editor, but not the second one by reviewers. Because of this, I would like to discuss two specific items of a manuscript, namely title and illustration, in this communication as my focal points. With this effort, improvement on manuscript quality, and more the success rate, is my wish, so that both authors and reviewers can benefit from the information presented here.</div></div>","PeriodicalId":13643,"journal":{"name":"International Biodeterioration & Biodegradation","volume":"196 ","pages":"Article 105912"},"PeriodicalIF":4.1,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142721448","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":"Comparative effects of chemical dispersants and rhamnolipid biosurfactants on oil biodegradation and microbial community in coastal sediments","authors":"Linjie Deng ,&nbsp;Chao Peng ,&nbsp;Shun Li ,&nbsp;Ruiyu Yang ,&nbsp;Chenyao Yan ,&nbsp;Min Li ,&nbsp;Lu Lu","doi":"10.1016/j.ibiod.2024.105913","DOIUrl":"10.1016/j.ibiod.2024.105913","url":null,"abstract":"<div><p>Marine coastal zones face pollution from both terrestrial and marine petroleum sources. Chemical and biological surfactants are employed to enhance oil dispersal and bioavailability in seawater, yet comparisons of their effects on microbial communities and oil degradation in sediments have not been well documented. Here, we conducted microcosm experiments mimicking oil spill scenarios with coastal sediment from the East China Sea, amended with either a dispersant (Jiefeite or Slickgone NS) or the biosurfactant rhamnolipid. The addition of Jiefeite, Slickgone, and rhamnolipid significantly enhanced oil biodegradation in sediments, with similar effects among them. The enhanced biodegradation activities observed were correlated with increased abundances of <em>phnAc</em> and <em>alkB</em> genes, as well as elevated abundances of predicted functional genes for the degradation of chloroalkane, chloroalkene, benzoates, toluene, and aromatic hydrocarbon. All oil microcosms showed significant growth in <em>Sulfurovum</em> and <em>Woeseia</em>. Oil microcosms treated with Jiefeite or Slickgone specifically enriched potential oil-degraders like <em>Syntrophotalea</em>, <em>Marinobacter</em>, and <em>Sphingomonadaceae</em>. In contrast, rhamnolipid-treated microcosms stimulated a more diverse community of oil-degrading bacteria, exhibiting increased abundances of <em>Pseudomonas</em>, <em>Lachnospirales</em>, <em>Aestuariicella</em>, <em>Vibrio</em>, and <em>Marinobacterium</em>. Our findings underscore the differential impacts of chemical dispersants and rhamnolipid on oil-degrading bacterial communities and their enhanced impacts on oil biodegradation, highlighting their potential in remediation of oil pollution in coastal sediments.</p></div>","PeriodicalId":13643,"journal":{"name":"International Biodeterioration & Biodegradation","volume":"196 ","pages":"Article 105913"},"PeriodicalIF":4.1,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0964830524001847/pdfft?md5=548cdf944ab155c3646ec96903cc72db&pid=1-s2.0-S0964830524001847-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142151689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}