International Biodeterioration & Biodegradation最新文献

{"title":"Ability of Perenniporia meridionalis to degrade selected European-grown hardwoods","authors":"Lauritz Schrader ,&nbsp;Christoph C. Tebbe ,&nbsp;Jochen Trautner ,&nbsp;Christian Brischke","doi":"10.1016/j.ibiod.2024.105863","DOIUrl":"10.1016/j.ibiod.2024.105863","url":null,"abstract":"<div><p>The natural durability of wood against basidiomycetes is an important reference value for the use of wood species as construction timber. However, only three test fungi must be used for durability testing according to European standards, although a much larger number of wood-destroying basidiomycetes are known. Here, we used a modified test protocol of the EN 113-2 standard to examine the abilities of two strains of <em>Perenniporia meridionalis</em>, one of them freshly isolated and the other being in culture for 23 years, to degrade wood of beech (<em>Fagus sylavatica</em>), English oak (<em>Quercus robur</em>) and black locust (<em>Robinia pseudoacacia</em>) by measuring the mass loss after 16 weeks of incubation at 22 °C, 26 °C and 30 °C, and 70 % relative humidity. The obligatory test fungus <em>Trametes versicolor</em> was used as a reference. We found that the degradation abilities of all fungal isolates increased with higher temperatures. Furthermore, the freshly isolated strain of <em>P. meridionalis</em> caused higher mass loss than the long-term cultured strain. For beech and black locust wood the highest mass loss was caused by <em>Trametes versicolor</em>, while for English oak it was the fresh isolate of <em>Perenniporia meridionalis.</em> In conclusion, our study demonstrates that <em>Perenniporia meridionalis</em> is a potent wood decaying fungus, which exhibited a higher degradation ability for English oak than the obligatory used white rot test fungus <em>Trametes versicolor</em>, and thus could become a useful indicator in the future when evaluating durability of this type of wood.</p></div>","PeriodicalId":13643,"journal":{"name":"International Biodeterioration & Biodegradation","volume":"194 ","pages":"Article 105863"},"PeriodicalIF":4.1,"publicationDate":"2024-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0964830524001343/pdfft?md5=dc2f5ed22047d5a7dd9c240843c838d4&pid=1-s2.0-S0964830524001343-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141732090","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":"Relationship between biodiversity and power generated by anodic bacteria enriched from petroleum-contaminated soil at various potentials","authors":"Bartosz Widera ,&nbsp;Natalia Tyszkiewicz ,&nbsp;Jaak Truu ,&nbsp;Piotr Rutkowski ,&nbsp;Piotr Młynarz ,&nbsp;Grzegorz Pasternak","doi":"10.1016/j.ibiod.2024.105849","DOIUrl":"10.1016/j.ibiod.2024.105849","url":null,"abstract":"<div><p>Microbial Fuel Cell (MFC) technology has become an alternative platform for bioremediation and power generation. Herein, three different potentials (−0.3 V, 0.0 V, +0.3 V vs Ag/AgCl) were used to improve the ability of the microbial community to degrade diesel fuel and assess their long-term community behaviour. The maximum current density was observed for the anode poised at −0.3 V (0.92 mAcm⁻²). Biofilm characterisation revealed that the most diverse bacterial community was obtained from the surface of the anode operated at −0.3 V. It was the most abundant in <em>Rhodococcus</em> and <em>Mycobacterium</em> species, which are capable of biosurfactant production and hydrocarbon degradation. In addition, negative potential promoted the growth of electroactive genera such as <em>Geobacter</em> and <em>Desulfovibrio.</em> That led to a superior power density of 83.2 mWm⁻², compared to 20.9 and 31.6 mWm⁻² at 0.0 and +0.3 V, respectively. The SEM analysis illustrated the morphologies of anodic biofilms, indicating the presence of conductive nanowires at −0.3 V. Electrochemical and bacterial community data demonstrated a correlation between community diversity and power output at different potentials. Furthermore, we have detected several microbial taxa capable of biosurfactant production. These results revealed the most effective approaches to enriching communities in petroleum-contaminated soil. This is the first time that various poised potentials were studied to enrich electroactive communities targeting diesel fuel degradation, with a focus on understanding dynamic changes of these communities.</p></div>","PeriodicalId":13643,"journal":{"name":"International Biodeterioration & Biodegradation","volume":"194 ","pages":"Article 105849"},"PeriodicalIF":4.1,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0964830524001203/pdfft?md5=e79dd6d6d20bb2ad045967ee469f0f03&pid=1-s2.0-S0964830524001203-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141729313","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":"Enhancing anthraquinone dyestuff degradation with composite activator: Proteomics of Burkholderia sp. DDMZ1-1","authors":"Qingyun Zhang ,&nbsp;Xiaoyue Liu ,&nbsp;Xuehui Xie ,&nbsp;Dayong Xu ,&nbsp;Xiaoying Zhang ,&nbsp;Saisai Chen ,&nbsp;Ying Hu ,&nbsp;Zhanao Lv ,&nbsp;Na Liu","doi":"10.1016/j.ibiod.2024.105859","DOIUrl":"10.1016/j.ibiod.2024.105859","url":null,"abstract":"<div><p>In this study, the composite activator was introduced to enhance the biodegradation of recalcitrant anthraquinone dyestuff (reactive blue 19, RB19) by <em>Burkholderia</em> sp. DDMZ1-1. The strain was found to decolorize 100 mg/L RB19 maximally (78% for 48 h cultivation) at the optimal conditions: static incubation, pH 6, 37 °C and 1% NaCl concentration. Further, the upgraded composite activator comprised of epigallocatechin gallate (2.5 mg/L), theanine (2.5 mg/L) and FeCl₃ (4.5 mg/L) manifested its favorable facilitative potential. An intensified secretion and activities of extracellular ligninolytic enzymes (MnP and LiP) took place via the induction of composite activator. Also, the composite activator somewhat reduced the phytotoxicity level of RB19 degraded metabolites. Proteomic profiling revealed that multiple functional proteins including pyruvate dehydrogenase, NADH-quinone oxidoreductase, superoxide dismutase, glutathione S-transferase, peroxidase, etc., were induced to be up-regulated in carbohydrate metabolism, oxidative phosphorylation, antioxidant system, glutathione metabolism and extracellular complexation with siderophores on account of composite activator. Elevated reducing force (NADH, H⁺), extracellular peroxidases (MnP, LiP, DyP) in concert with H₂O₂, and the cellular homeostasis maintenance jointly facilitated RB19 decomposition. Collectively, this study will give insights into the underlying bioaugmentation mechanism of composite activator reinforcing the bioremediation of refractory textile wastewater by an indigenous <em>Burkholderia</em> strain.</p></div>","PeriodicalId":13643,"journal":{"name":"International Biodeterioration & Biodegradation","volume":"193 ","pages":"Article 105859"},"PeriodicalIF":4.1,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141636539","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":"Integrated proteomic analysis reveals physiological changes during cometabolic degradation of Tetrabromobisphenol A (TBBPA) by Enterobacter cloacae strain ECsp1","authors":"Williane Vieira Macêdo ,&nbsp;Jan Struckmann Poulsen ,&nbsp;Sarah Regina Vargas ,&nbsp;Marcelo Zaiat ,&nbsp;Jeppe Lund Nielsen","doi":"10.1016/j.ibiod.2024.105860","DOIUrl":"10.1016/j.ibiod.2024.105860","url":null,"abstract":"<div><p>Using labelled-free proteomics, this study elucidates that the <em>Enterobacter cloacae</em> ECsp1 strain's response to tetrabromobisphenol A (TBBPA) exposure, revealing the degradation of the compound via cometabolism, which remodels the bacterial proteome. TBBPA is the dominant brominated flame retardant worldwide, but its degradation in wastewater plants remains poorly understood. Among the 531 identified proteins, 43 were up-regulated and 23 were down-regulated. Overexpressed proteins indicate that exposing this microorganism to the toxicant involves both up- and downregulation of enzymes involved in carbohydrate metabolism, genetic information processing, biosynthesis, cell maintenance, and xenobiotic degradation pathways. Evaluating the variation in protein abundance suggests degradation pathways related to: 1) the final steps of the glycolysis and alcohol fermentation in a cometabolism with glucose by phosphoglycerate mutase (PPM) and alcohol dehydrogenase (ADH) and 2) cleavage of the aromatic ring by carboxymuconolactone decarboxylase (CMD), specifically targeting benzoate and phenolic groups. The group of enzymes showing the widest variety of significantly upregulated proteins is related to xenobiotic transport elements (ABC transporters). Additionally, oxidative stress and envelope stress response are suggested by the upregulation of peroxidases and NlpE enzymes. Understanding dynamic changes in the protein expression sheds light on the metabolic mechanisms underlying TBBPA degradation during acidogenesis.</p></div>","PeriodicalId":13643,"journal":{"name":"International Biodeterioration & Biodegradation","volume":"193 ","pages":"Article 105860"},"PeriodicalIF":4.1,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141636540","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":"Gut microbial comminoty in Tenebrio molitor larvae responsed to PS and PE within 6 hours","authors":"Kunyue Zhang ,&nbsp;Xiaobiao Ma ,&nbsp;Haibo Tang,&nbsp;Xiangkai Li,&nbsp;Chunlan Mao","doi":"10.1016/j.ibiod.2024.105853","DOIUrl":"https://doi.org/10.1016/j.ibiod.2024.105853","url":null,"abstract":"<div><p>Gut microbes of <em>Tenebrio molitor</em> larvae are crucial in plastic degradation. However, microbial responses to the plastic feeding remains unclear. This study aimed to analyze the changes of microbial community and function feeding PE and PS. It found that after 72 h, the larvae survival rate was 92.2% and 82.2% and the plastic weight loss (consumption rate) was 8.8% (0.44 g, <em>p</em> &lt; 0.01) and 6.9% (0.09 g) for PS and PE, respectively. More interestingly, plastic structure changes and the relative microbial responses happened after 6 h. C<img>O and C–O stretching, hydrogen bonding, and a significant decrease in [M_n] (<em>p</em> &lt; 0.05) and [M_W] (<em>p</em> &lt; 0.001) were found; Furthermore, the time-similar microbial diversity obviously clustered and the composition significantly changed. The dominant phylum were Firmicutes and Proteobacteria. At genus level, the dominant PS-degrading taxa were unclassified <em>Enterobacteriaceae</em>, <em>Acinetobacter</em> and <em>Sediminibacterium</em>, and were unclassified <em>Enterobacteriaceae</em>, <em>Acinetobacter</em> and <em>Delftia</em> in PE samples; Additionally, difference of carbohydrate metabolism was found, and plastic degrading gene S-formyl glutathione hydrolase significantly high-expressed (PS-3500 fold and PE-5 fold); Moreover, PS-degrading pathways, such as styrene, benzoate, ethylbenzene and xylene degradation pathways were identified. Those illustrated the plastic degrading occurred just within 6 h and the plastic chemistry determined its’ degradability.</p></div>","PeriodicalId":13643,"journal":{"name":"International Biodeterioration & Biodegradation","volume":"193 ","pages":"Article 105853"},"PeriodicalIF":4.1,"publicationDate":"2024-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0964830524001240/pdfft?md5=8e74b1bec7261670ab2b3f6d05d0cc01&pid=1-s2.0-S0964830524001240-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141605757","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":"Evaluation of chemical properties and humification process during co-composting of spent mushroom substrate (Pleurotus ostreatus) and pig manure under different mass ratios","authors":"Shuai Wang,&nbsp;Pingxin Liu,&nbsp;Mingshuo Wang,&nbsp;Yongquan Cui,&nbsp;Yunxian Tuo,&nbsp;Bowei Zhao,&nbsp;Nan Wang","doi":"10.1016/j.ibiod.2024.105858","DOIUrl":"https://doi.org/10.1016/j.ibiod.2024.105858","url":null,"abstract":"<div><p>Spent mushroom substrate (SMS) from <em>Pleurotus ostreatus</em> is high in salinity, susceptible to deterioration caused by mold, and not suitable for direct application in soil. Its high C/N ratio and low pH inhibit the humification process during composting. Pig manure (PM) possesses high density and low porosity, impeding microbial metabolism. Co-composting SMS and PM can overcome these challenges. A 120-day composting experiment was conducted with varying mass ratios of SMS and PM, supplemented with calcium bentonite and microbial inoculum. After composting, there was observed a significant rise in the N and K₂O contents, ranging from 11.1% to 84.1% and 55.1%–296.8%, respectively. Additionally, there was a decrease in the C/N ratio by a range of 18.9%–60.1%. The total nutrient content of SMS post-composting solely was a mere 4.9%, failing to meet the 5% required by China's Professional Standard outlined for organic fertilizers (NY/T525-2021). Composting PM alone simplified the molecular structure of humic-extracted acid (HE) and reduced the C content of humic acid (HA) by up to 18.1%. In contrast, co-composting SMS and PM in equal proportions stimulated microbial consumption of water-soluble substances, resulting in increase in C contents of HE and HA by 11.5% and 18.7%, respectively, along with a 15.4% rise in the polymerization level of the composted materials. Furthermore, this combination facilitated the conversion of inert humic component, reducing C content of humin by 79.3%, lowering the electrical conductivity (EC) value by 23.0%, and boosting GI value by 154.1%. Increasing the proportion of SMS in co-compost proved advantageous in enriching its organic matter content. The composting process involved bio-degradation of O-containing functional groups like phenols and alcohols, utilization of polysaccharides by microorganisms, and development of carboxyl groups in the HA. Based on the above index analysis, the most effective compost ratio to achieve higher humification level and compost quality was determined to be a mass ratio of SMS to PM of 5:5, followed by 6:4.</p></div>","PeriodicalId":13643,"journal":{"name":"International Biodeterioration & Biodegradation","volume":"193 ","pages":"Article 105858"},"PeriodicalIF":4.1,"publicationDate":"2024-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141606573","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":"The mitigation of citric acid on cadmium toxicity in Iris tectorum and its effects on the composition of cell walls","authors":"Xiao-Fang Yu ,&nbsp;Zhi-Wen Wang ,&nbsp;Feng-Lian Chen ,&nbsp;Mao-Lin Chen ,&nbsp;Xin-Yu Zhang ,&nbsp;Jun-Rui Zhang ,&nbsp;Wen-Yu Ji ,&nbsp;Xue Xiao ,&nbsp;Li-Juan Yang ,&nbsp;Ting Lei ,&nbsp;Xi Li ,&nbsp;Ming-Yan Jiang","doi":"10.1016/j.ibiod.2024.105857","DOIUrl":"https://doi.org/10.1016/j.ibiod.2024.105857","url":null,"abstract":"<div><p>Cadmium (Cd), a widely distributed and highly toxic heavy metal, poses a severe threat to soil fertility and plant growth. Citric acid (CA), a small organic acid molecule, plays a crucial role in alleviating heavy metal toxicity in plants. However, the specific mechanism underlying how CA organizes and mitigates the damage caused by heavy metals to plant cells remains unclear. Therefore, we studied the impact of exogenous CA on Cd-induced stress in <em>Iris tectorum</em>. The results showed that the addition of exogenous CA significantly increased the activity of antioxidant enzymes and altered the content of mineral elements including Fe, Zn, Ca, and Mn. Notably, compared to the Cd-only treatment, the proportion of Cd in the root cell walls increased by 14% in the presence of CA, and this increase was due to the ability of CA to regulate the amount of polysaccharide components in the root cell walls. CA affected the activity of pectinesterase (PME), changed the degree of pectinesterification (PMD), and enhanced the root cell walls’ ability to bind Cd, thereby reducing the Cd content in the above-ground tissues and alleviating heavy metal toxicity in plants. In summary, this study provides robust evidence that supports the use of CA to improve the efficiency of urban soil remediation.</p></div>","PeriodicalId":13643,"journal":{"name":"International Biodeterioration & Biodegradation","volume":"193 ","pages":"Article 105857"},"PeriodicalIF":4.1,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141593913","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":"Earthworm modifies microbial community and functional genes for lignocellulosic waste valorization: Isolating plant-growth-promoting bacteria via next generation sequencing","authors":"Ratan Chowdhury ,&nbsp;Soma Barman ,&nbsp;Moharana Choudhury ,&nbsp;Ki-Hyun Kim ,&nbsp;Satya Sundar Bhattacharya","doi":"10.1016/j.ibiod.2024.105854","DOIUrl":"https://doi.org/10.1016/j.ibiod.2024.105854","url":null,"abstract":"<div><p>The primary motivation of this study is the lack of knowledge regarding the shift in microbial community and functional compositions in lignocellulosic waste-based composting and vermicomposting systems. To date, the next-generation sequencing approaches have scantily been made for the isolation of plant-growth-promoting microorganisms from vermicomposting systems. Therefore, two types of lignocellulosic waste (paddy straw and food waste) are mixed with and without cow dung in different ratios and vermicomposted with <em>Eisenia fetida</em>, while using a series of aerobic composting as a control. Significant decreases in pH, organic C (∼3 fold), and XRD-derived crystallinity are seen most evidently in the paddy straw-food waste (1:1) mixtures upon vermicomposting (compared to composting) along with a concurrent increment of nutrients (NPK) (∼2–3.5 fold). Significant augmentation (P &lt; 0.01) in microbial activity (biomass and respiration) and growth (bacteria and fungus) is observed under vermicomposting. A considerable shift in taxonomic diversity, accompanied by differential functional diversity of the microbial communities, is detected between paddy straw-food waste (1:1) vermicompost and compost after 60 days of incubation. The overall gene volume is greater in the vermibed than in the compost, and genes of a few well-known microbial communities with good plant growth promoting traits (e.g., <em>Beijerinckiaceae</em> and <em>Propionibacteriaceae</em>) are exclusive to the vermicompost. Additionally, genes associated with beneficial microbial activities, such as amino acid transport, nuclear structure development, and lipid transport, are found to be more abundant in vermicompost than in compost. These data are helpful in identifying suitable feedstock for isolating scalable microbial species with beneficial traits. Subsequently, six multi-dimensional plant-growth-promoting endophytic bacterial species are isolated from both the vermibed and earthworm guts. Interestingly, close genetic resemblances are found for a few of these isolates with the metagenomically detected genes. In conclusion, this is the first study to identify the practical utility of next-generation sequencing-based metagenomic analyses for the meaningful isolation of economically viable microbial species from vermicomposting systems that might replace a sizeable portion of the chemical fertilizers used in agriculture.</p></div>","PeriodicalId":13643,"journal":{"name":"International Biodeterioration & Biodegradation","volume":"193 ","pages":"Article 105854"},"PeriodicalIF":4.1,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141594014","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":"Enhancement in sugar extraction from Pistia stratiotes through statistical optimization of alkaline pre-treatment and enzymatic hydrolysis","authors":"Sweeti Mann ,&nbsp;Jai Gopal Sharma ,&nbsp;Rashmi Kataria","doi":"10.1016/j.ibiod.2024.105852","DOIUrl":"https://doi.org/10.1016/j.ibiod.2024.105852","url":null,"abstract":"<div><p>In lignocellulosic biomass, reducing structural recalcitrance and enhancing hydrolysis efficiency are crucial factors for increasing fermentable sugars and the production of valuable products. This biomass substrate comprises lignin, hemicellulose, and cellulose. In this study, response surface methodology was employed to optimise alkaline pre-treatment followed by enzymatic hydrolysis, aiming to enhance the saccharification of <em>Pistia stratiotes</em>. The NaOH concentration during pre-treatment significantly influenced the delignification process, resulting in increased cellulose content. The highest cellulose content was achieved with 2.47% NaOH at 120 °C for 60 min, leading to enhanced cell porosity and facilitating greater enzyme saccharification accessibility. Under these optimized conditions, the sample exhibited a 51.66% cellulose content. The physicochemical characteristics of the cellulose obtained after pre-treatment were analysed using SEM, FTIR, and TGA. After enzymatic hydrolysis of the cellulose with a commercially available cellulase enzyme, 31.06 g/L of reduced sugar was produced after 72 h. This study demonstrates that alkaline pre-treatment of <em>Pistia stratiotes</em> significantly increased its cellulose content, leading to a higher sugar yield during enzymatic hydrolysis.</p></div>","PeriodicalId":13643,"journal":{"name":"International Biodeterioration & Biodegradation","volume":"193 ","pages":"Article 105852"},"PeriodicalIF":4.1,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141593914","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":"Photocatalytic mediated marine biofouling inhibition using nano CuO: TiO2-carbon dot embedded on organo silane surface modified polyethylene aquaculture cage nets","authors":"P Muhamed Ashraf,&nbsp;C.S. Anjana,&nbsp;N Manju Lekshmi","doi":"10.1016/j.ibiod.2024.105856","DOIUrl":"10.1016/j.ibiod.2024.105856","url":null,"abstract":"<div><p>Biofouling in aquaculture cages is a potential problem and its management become major concern to the planners and farmers. The study aimed to modify the surface of polyethylene aquaculture cage nets using organo silane and to evaluate the effectiveness of a nano CuO:TiO2-carbon dot biocide treatment in inhibiting marine biofouling through photocatalytic action. Polyethylene aquaculture cage net surface modified using organo silane and the surface embedded with biocide of nano CuO:TiO₂ and carbon dot (CD) derived from fish eye. The biocide-treated surface was characterized using UV–Visible and Fourier Transform Infrared spectrometry. The organo silane interacts with polyethylene via hydrogen bonding, CuO:TiO₂ interacts with the silane's Si, and the carbon dots' conjugated C<img>C bonds interact with the transition metal and silane through van der Waals electrostatic forces and hydrogen bonding. Varied concentrations of CuO:TiO₂ and CD was coated sequentially over silane surface modified polyethylene, exposed in the marine environment to evaluate biofouling inhibition efficiency and found 0.05% each of CuO:TiO₂ and CD was optimum. The CuO:TiO₂–CD coated polyethylene cage net tested for its biofouling inhibition for 8 months in marine environment and exhibited excellent biofouling inhibition. The inhibition of biofouling was attributed to the enhanced photocatalytic action, resulting from increased electron-hole recombination, thus generating ROS, O₂٠, and OH٠ radicals. This led to the highest electronic activity around the cage net and also the formation of an acidic environment deterred microorganisms. The study highlighted the use of organo silane for surface modification of polyalkenes to load the biocide and also CuO:TiO₂–CD is a potential biocide for biofouling inhibition in aquaculture cages.</p></div>","PeriodicalId":13643,"journal":{"name":"International Biodeterioration & Biodegradation","volume":"193 ","pages":"Article 105856"},"PeriodicalIF":4.1,"publicationDate":"2024-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141574261","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}