International Biodeterioration & Biodegradation最新文献

{"title":"Enhanced degradation of crude oil by immobilized bacterial consortium through eliminating microbial flocculation towards crude oil","authors":"Zheng-Fei Yan ,&nbsp;Qing-Song Huang ,&nbsp;Jing Yang ,&nbsp;Xue-Yi Qiao ,&nbsp;Bo Xu ,&nbsp;Wei Xia ,&nbsp;Ling-Qia Su","doi":"10.1016/j.ibiod.2024.105935","DOIUrl":"10.1016/j.ibiod.2024.105935","url":null,"abstract":"<div><div>Microbial degradation is considered an effective and sustainable technique for the remediation of oily sludge; thus, the acquisition of crude oil-degrading bacteria is crucial for effective bioremediation. This study introduces a novel domestication-enrichment-isolation (DEI) strategy to isolate crude oil-degrading bacteria from oily sludge. Two strains, <em>Rhodococcus rhodochrous</em> JS-24 (R.rh) and <em>Gordonia cholesterolivorans</em> JS-13 (G.ch), demonstrated the highest degradation rates of 53.7% and 34.6%, respectively, within 7 days. While no synergistic effect was observed with their combined use in free bacterial consortia, and the overall degradation rate decreased to 51.9 %, which was weaker than that of R. rh treatment alone. The decrease in degradation rate is attributed to microbial flocculation towards crude oil: most droplets of crude oil were encapsulated into spherical aggregations by G. ch, thereby hindering the contact and degradation of droplets by R. rh. In contrast, immobilization technology significantly enhanced crude oil degradation by eliminating this flocculation effect. The immobilized bacterial consortium achieved a 95.5% degradation rate, representing the highest degradation rate reported for bacterial consortia. This study reveals for the first time that the side effects of bioflocculation on crude oil degradation and provides guidance for the construction of bacterial consortium.</div></div>","PeriodicalId":13643,"journal":{"name":"International Biodeterioration & Biodegradation","volume":"196 ","pages":"Article 105935"},"PeriodicalIF":4.1,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142427666","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 mechanism of asphalt by microbial consortia in asphalt pavement of forest area road","authors":"Qiangqiang Xia,&nbsp;Lisha Shi,&nbsp;Ding Ma,&nbsp;Tao Xu","doi":"10.1016/j.ibiod.2024.105930","DOIUrl":"10.1016/j.ibiod.2024.105930","url":null,"abstract":"<div><div>To study the degradation behaviors of asphalt by microorganisms and reveal biodegradation mechanism of asphalt, 16S rRNA full-length sequencing was utilized to analyze the collected samples from three forest areas. Five strains, namely <em>Sphingomonas polyaromaticivorans</em>, <em>Pseudomonas putida</em>, <em>Pseudomonas fluorescens</em>, <em>Bacillus cereus</em>, and <em>Bacillus subtilis</em>, were selected for compounding microbial consortium to study its degradation effects on asphalt. The micromorphology, elemental chemical states, micromechanical properties, molecular weight distribution, and functional groups of degraded asphalt were studied using environmental scanning electron microscopy, X-ray photoelectron spectroscopy, atomic force microscopy, gel permeation chromatography, and Fourier transform infrared spectroscopy. The results show that the biodegradation of asphalt by microbial consortium increases the surface roughness of asphalt and reduces surface adhesion. Asphalt is used as the sole carbon source by microbial consortium, resulting in a continuous decrease in the contents of C and N elements, while the content of O element is continuously increased. Simultaneously, under the action of microbial enzymes, C-C/C-H bonds which are combined with molecular oxygen in asphalt are continuously broken and converted to C-O-C/C-O-H bonds. The continuous reductions in methylene index and butadiene index of asphalt, as well as the production of carbonyl functional groups confirm the oxidative degradation of asphalt by microbial consortium. Additionally, with the extension of degradation time, the large molecular substances in asphalt are gradually degraded by microbial consortium, leading to a more concentrated molecular weight distribution. This study is of great importance to understand biodegradation mechanism of asphalt.</div></div>","PeriodicalId":13643,"journal":{"name":"International Biodeterioration & Biodegradation","volume":"196 ","pages":"Article 105930"},"PeriodicalIF":4.1,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142328020","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":"Synergistic remediation of electroplating wastewater contaminated soil and reduction of risk of groundwater contamination by biochar and Pseudomonas hibiscicola strain L1","authors":"Binbin Ran ,&nbsp;Qiang An ,&nbsp;Shuman Deng ,&nbsp;Jiali Song ,&nbsp;Zhiruo Huang ,&nbsp;Bin Zhao","doi":"10.1016/j.ibiod.2024.105926","DOIUrl":"10.1016/j.ibiod.2024.105926","url":null,"abstract":"<div><div>With the continuous development of electroplating industry, a large amount of electroplating wastewater is generated, which can be harmful to soil and basement. Introducing microorganisms into polluted soil can improve the soil environment, but it has the disadvantages of easy loss and low activity. In this study, the synergistic effect of biochar and strain L1 (BL1) was utilized to effectively reduce the risk of groundwater contamination by Ni(II), Cu(II), Cr(VI), and Zn(II), which are common heavy metals in electroplating wastewater. And the mechanism was found as BL1 was found to increase the porosity and water retention of the soil by specific surface area determination (BET) and scanning electron microscopy (SEM), favored the growth of soil microorganisms. It was found that BL1 could improve soil pH, enzyme activity, total organic carbon and other indicators by measuring soil physical and chemical properties. The results of microbial community analysis showed that BL1 increased the diversity of soil community and enriched microorganisms with nitrification and denitrification functions, thus promoting the removal of NH₄⁺-N and NO₃-N. Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) diffraction results showed that -OH, -CH, C=O, Si-O-Si, CO₃²⁻ and PO₄³⁻ of BL1 complexed with heavy metals to form precipitates. Thus, the conversion of heavy metals to the stable state was promoted. These results show that the addition of BL1 can effectively improve the soil environment and promote the self-recovery of soil function.</div></div>","PeriodicalId":13643,"journal":{"name":"International Biodeterioration & Biodegradation","volume":"196 ","pages":"Article 105926"},"PeriodicalIF":4.1,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142318990","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":"Monoterpenes profile and high temperature as a potential factors in the infestation of wooden structures by Hylotrupes bajulus L","authors":"Adam Krajewski,&nbsp;Andrzej Antczak,&nbsp;Dominika Szadkowska,&nbsp;Piotr Witomski","doi":"10.1016/j.ibiod.2024.105928","DOIUrl":"10.1016/j.ibiod.2024.105928","url":null,"abstract":"<div><div><em>Hylotrupes bajulus</em> L. is a dangerous destroyer of wooden structures. Monoterpenes (mainly α-pinene and 3-carene) attract of this beetle females to lay eggs on wood. The phenomenon of sporadic occurrence of old house borer larvae in old wooden structures and its reappearance in these structures after the previous use of hot air to old house borer combating has been known for many decades. The causes of these phenomena were not explained. In this work, it was hypothesized that the cause of these phenomena was poor attraction of this wood for females due to the reduced amount of monoterpenes in such wood. An experiment was carried out on the possibility of developing old house borer larvae in old natural aged wood. Tests were also carried out on the profile of monoterpenes in uninfested old natural aged wood, contemporary wood and contemporary wood after heating at high temperature. The possibility of development of newly hatched <em>H. bajulus</em> larvae in old natural aged wood and a high concentration of monoterpenes (mainly α-pinene and 3-carene) in such wood were found. The sporadic presence of old house borer larvae in very old wooden structures cannot be explained directly by a reduction in the concentration of attracting monoterpenes. The concentration of monoterpenes in contemporary wood after exposure to high temperature was whereas significantly reduced. This may be the reason for sporadic cases of repeated attacks on structures previously exposed to very hot air.</div></div>","PeriodicalId":13643,"journal":{"name":"International Biodeterioration & Biodegradation","volume":"196 ","pages":"Article 105928"},"PeriodicalIF":4.1,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142318989","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":"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}