Environmental Technology & Innovation最新文献

{"title":"The ammonium transporter AmtB is dispensable for the uptake of ammonium in the phototrophic diazotroph Rhodopseudomonas palustris","authors":"Lu Huang ,&nbsp;Weilai Lu ,&nbsp;Yunkai Yu ,&nbsp;Haoning Qiu ,&nbsp;Yan Zeng ,&nbsp;Lida Wang ,&nbsp;Ying Liu ,&nbsp;Lei Yan ,&nbsp;Yu Vincent Fu ,&nbsp;Yanning Zheng","doi":"10.1016/j.eti.2024.103853","DOIUrl":"10.1016/j.eti.2024.103853","url":null,"abstract":"<div><div>Ammonium (NH₄⁺) transport across cell membranes plays an important role in assimilation or removal of the environmental nitrogen. The membrane protein AmtB has been considered to be the NH₄⁺ transporter that is responsible for the NH₄⁺ uptake. The phototrophic diazotroph <em>Rhodopseudomonas palustris</em> harboring two <em>amtB</em> genes has been widely used in wastewater treatment and bioremediation. However, the role of AmtB in NH₄⁺ uptake remains unclear in <em>R. palustris</em>. Here, we employed an innovative approach combining stable isotope probing (SIP) with Raman spectroscopy to determine the physiological functions of AmtB1 and AmtB2 in <em>R. palustris.</em> This powerful technique allowed us to investigate NH₄⁺ uptake at the single-cell level. The generated <em>R. palustris</em> Δ<em>amtB1</em> Δ<em>amtB2</em> mutant lacking AmtB1 and AmtB2 proteins was still capable of utilizing ¹⁵NH₄⁺ even the ¹⁵NH₄⁺ concentration was as low as 5 μM. These data demonstrate that both of the AmtB proteins are not essential for <em>R. palustris</em> to take up NH₄⁺ regardless of environmental NH₄⁺ levels. However, both AmtB1 and AmtB2 can contribute to NH₄⁺ uptake under nitrogen-limiting conditions. Given that <em>R. palustris</em> primarily expresses AmtB2 in these conditions, AmtB2 plays a more important role in NH₄⁺ uptake compared to AmtB1. In addition, transcriptomic analysis showed that the deletion of the <em>amtB1</em> and <em>amtB2</em> genes resulted in the upregulation of many transporter genes, providing potential targets for future investigation of alternative NH₄⁺ uptake systems.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"36 ","pages":"Article 103853"},"PeriodicalIF":6.7,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142421066","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":"An innovative sustainable solution: Recycling shield-discharge waste soil as fine aggregate to produce eco-friendly geopolymer-based flowable backfill materials","authors":"Guijie Zhao ,&nbsp;Hongzhan Guan ,&nbsp;Huan Yan ,&nbsp;Yunkai Ruan ,&nbsp;Yafei Han ,&nbsp;Xiaoqiang Pan ,&nbsp;Jinfeng Tian ,&nbsp;Bo Liu","doi":"10.1016/j.eti.2024.103857","DOIUrl":"10.1016/j.eti.2024.103857","url":null,"abstract":"<div><div>The disposal of Shield-Discharge Waste Soil (SDWS) is substantial, yet their recycling rate remains low, necessitating the exploration of new recycling methods for effective waste management. This study examines the potential use of SDWS as a fine aggregate in the production of Controlled Low-Strength Material (CLSM), incorporating slag and fly ash as precursors. Key properties such as strength, flowability, setting time, microstructure, chemical composition, CO₂ emissions, energy consumption, and cost were assessed and analyzed. Additionally, the environmental impact and material-related strategies were discussed. The results reveal that the developed CLSM exhibits competitive performance, with compressive strengths ranging from 2.830 MPa to 4.121 MPa, achieving over 1.0 MPa strength within 24 hours. The material demonstrates high flowability, exceeding 200 mm within 30 minutes, and has a setting time between 2.10 and 4.23 hours, offering advantages in both setting time and early strength. SDWS contributes to extending the coagulation process and enhancing the flowability. Optimal strength is observed when SDWS constitutes approximately 30 % of the binders or when the alkali equivalent is around 7 %. Compared to traditional cement-based CLSMs, incorporating SDWS results in reduced CO₂ emissions and lower energy consumption. When considering savings from reduced waste disposal costs, the overall material cost remains competitive. Furthermore, higher SDWS content leads to enhanced environmental benefits, and it is recommended to keep the alkali equivalent below 7 % for optimal performance. In conclusion, the developed CLSM presents significant potential for wide-scale applications and offers a sustainable solution for recycling SDWS.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"36 ","pages":"Article 103857"},"PeriodicalIF":6.7,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142421068","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":"Remediation of Pb and Cd contaminated sediments by wheat straw biochar and microbial community analysis","authors":"Yanhao Zhang ,&nbsp;Wenlu Zhou ,&nbsp;Chengying Liu ,&nbsp;Guanghui Liu ,&nbsp;Yi Li ,&nbsp;Botao Ding ,&nbsp;Peng Zhang ,&nbsp;Xu Zhang ,&nbsp;Zhibin Zhang","doi":"10.1016/j.eti.2024.103849","DOIUrl":"10.1016/j.eti.2024.103849","url":null,"abstract":"<div><div>Wheat straw biochar (BC) or modified wheat straw biochar (MBC) could affect the aggregate structure of soil, effectively adsorb heavy metal and reduce the bioavailability of heavy metals in soil. TGA, BET, FTIR and SEM were used to characterize the surface morphology and structure of BC and MBC. The adsorption properties of BC and MBC on Pb(‌II) and Cd(‌II) in solution systems were investigated by batch experiments, and the remediation performance of Pb and Cd contaminated sediment by BC or MBC were studied by pot experiments. The results showed that MBC had a larger specific surface area of 46.04 m²/g and total pore volume 0.0555 cm³/g; the adsorption isotherms of Pb(II) and Cd(II) for BC and MBC were more suitable for Langmuir model (<em>R</em>^<em>2</em> over 0.91), and the maximum adsorption capacities of Pb(II) and Cd(II) by MBC could reach 71.14 and 115.64 mg/g, respectively. BC or MBC promoted the transformation of Pb and Cd from the extractable acid fraction to the oxidizable and residual fraction, reduced the migration of heavy metals and enhanced the stability of aggregates. Therefore, the results provided a perspective for the dredged contaminated sediments used as planting soil. In addition, BC or MBC, as soil amendments, could improve the abundance of microbial community. At the phylum level, the main dominant bacteria were <em>Proteobacteria</em> and <em>Bacteroidetes</em>.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"36 ","pages":"Article 103849"},"PeriodicalIF":6.7,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142421064","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":"Assessing subgroup differences and underlying causes of ozone-associated mortality burden in China using multi-source data","authors":"Yong Li ,&nbsp;Maofei Ni ,&nbsp;Qingying Liu ,&nbsp;Qin Liao ,&nbsp;Yun Bai ,&nbsp;Chuan Li","doi":"10.1016/j.eti.2024.103856","DOIUrl":"10.1016/j.eti.2024.103856","url":null,"abstract":"<div><div>Long-term ozone exposure is a significant public health concern. To mitigate its impact, it is crucial to identify diseases, populations, and regions that are particularly sensitive to ozone. In this study, we used high-quality data and updated relative risk estimates to investigate subgroup differences in mortality burden due to ozone exposure in China. In 2020, nationwide ozone-associated deaths totaled 276,800 (95 % CI: 106,700–451,900), representing 3.2 % of all deaths, with respiratory and cardiovascular diseases accounting for 16.8 % and 83.2 %, respectively. The per capita ozone-associated mortality in China was 20 per 100,000 person-years, with a significantly higher rate observed in elderly individuals aged ≥75 years (189 deaths per 100,000) compared to young individuals aged 30–44 years (1 death per 100,000). There were notable spatial patterns of ozone-associated deaths among the regions, indicating a critical response to ozone levels and population density. Interestingly, urban areas exhibited a 22.4 % lower mortality rate related to ozone compared to rural areas. This difference was attributed to the combined influence of ozone exposure (+19.9 %), population size (+17.7 %), age structure (−39.2 %), and baseline mortality (−20.8 %). By emphasizing subgroup differences and driving factors, these findings significantly enhance the understanding of the ozone-associated mortality burden, providing valuable insights for policymakers.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"36 ","pages":"Article 103856"},"PeriodicalIF":6.7,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142421063","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":"Synchronously improving intracellular electron transfer in electron-donating bacteria and electron-accepting methanogens for facilitating direct interspecies electron transfer during anaerobic digestion of kitchen wastes","authors":"Xin He ,&nbsp;Zhipeng Ao ,&nbsp;Yuan Li ,&nbsp;Yang Li ,&nbsp;Zhiqiang Zhao ,&nbsp;Yaobin Zhang","doi":"10.1016/j.eti.2024.103843","DOIUrl":"10.1016/j.eti.2024.103843","url":null,"abstract":"<div><div>Two major issues generally limit the effectiveness of direct interspecies electron transfer (DIET) during anaerobic digestion: 1) lack of essential electrical connection component, electrically conductive pili (e-pili) or multi-heme <em>c</em>-type cytochrome (MHC); 2) the thermodynamic limitations of combining electrons with protons for reducing carbon dioxide to methane. To address both issues, a strategy for facilitating DIET via combining ethanol-type fermentation pretreatment (EFP) with NaCl addition during anaerobic digestion of kitchen wastes was proposed. Combining EFP with NaCl addition dramatically increased methane yield rates (531.3 ± 11.4 vs 410.5 ± 8.7 mL/gVS_added/d) and efficiencies of conversion of organic substrates to methane (571.2 ± 13.8 vs 488.7 ± 11.7 mL/gVS_removal). The increased performances by combining EFP with NaCl addition were higher than that by independent EFP or NaCl addition. <em>Paludibacter sp.</em>, <em>Petrimonas sp.</em> and <em>Syntrophomonas wolfei</em> were the predominant and metabolically active electron-donating bacteria, and their expression of genes for e-pili/MHCs by combining EFP with NaCl addition was higher than that by independent EFP or NaCl addition. <em>Methanothrix soehngenii</em> and <em>Methanoculleus bourgensis</em> were the predominant and metabolically active electron-accepting methanogens, and their expression of genes for carbon dioxide reduction pathway for methanogenesis by combining EFP with NaCl addition was higher than that by independent EFP or NaCl addition. In addition, EFP specifically increased the transcript abundance of genes for NAD⁺/NADH transformation closely associated with the formation of e-pili/MHCs, while NaCl addition specifically increased the transcript abundance of genes for coenzyme F₄₂₀/F₄₂₀H₂ transformation known to participate in reduction of carbon dioxide to methane.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"36 ","pages":"Article 103843"},"PeriodicalIF":6.7,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142421062","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":"Biopolymer polyhydroxyalkanoate production from Arthrospira platensis NLHT3 cyanobacterium isolated in Vietnam","authors":"Thi Lan Anh Nguyen ,&nbsp;Hien Thi Thu Tran ,&nbsp;Thi Minh Thu Quach ,&nbsp;Yen Hai Dao ,&nbsp;Hung Cong Duong ,&nbsp;Oanh Thi Doan ,&nbsp;Thuy Thi Duong ,&nbsp;Lan Thi Thu Tran","doi":"10.1016/j.eti.2024.103841","DOIUrl":"10.1016/j.eti.2024.103841","url":null,"abstract":"<div><div>Cyanobacteria are photosynthesis microorganisms that can convert CO₂ into biomass using light as an energy source. Cyanobacteria can also produce polyhydroxyalkanoates (PHA) for intracellular energy and carbon storage, especially under nutrient-deficient conditions. This study investigates the effects of nutrient media and culturing conditions on PHA accumulation in <em>Arthrospira platensis</em> NLHT3. PHA accumulation in <em>A. platensis</em> NLHT3 reached the optimum value of 28.2 % on the day 15 of cultivation with supplemented mixture of 0.1 M of NaHCO₃ and 94 mM of C₃H₅NaO₂ (sodium propionate) as carbon sources, 12 mM of NaNO₃ as nitrogen source, and 1.72 mM of K₂HPO₄ as phosphorous source. An even higher PHA accumulation of 39 % was achieved when light intensity increased from 75 to 108 µmol photons m⁻² s⁻¹ at light/dark cycle of 16 h/8 h and the abovementioned carbon and nutrient concentrations. The accumulated PHA was identified as poly(3-hydroxybutyrate) (PHB) using Fourier-transform infrared spectroscopy and ¹H and ¹³C nuclear magnetic resonance. The results reported here reveal the great potential of <em>A. platensis</em> NLHT3 for large-scale production of biodegradable PHA plastics.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"36 ","pages":"Article 103841"},"PeriodicalIF":6.7,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142421067","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":"Aspergillus versicolor mediated biofabrication of zinc phosphate nanosheets for exploring their antimycotic activity and development of alginate-based nanocomposite for enhanced dye degradation","authors":"Reyad M. El-Sharkawy ,&nbsp;Mohamed Khairy ,&nbsp;Magdi E.A. Zaki","doi":"10.1016/j.eti.2024.103840","DOIUrl":"10.1016/j.eti.2024.103840","url":null,"abstract":"<div><div>The production of novel, suitable, and cost-effective nanocomposites are highly required for its prospective application in the remediation of environmental pollutants and as antimycotic agents. Zinc phosphate nanosheets (ZP-ns) were fabricated by harnessing the exometabolites of <em>Aspergillus versicolor</em> and then incorporated within an alginate biopolymer (ZP-ns@Alg) to improve the biosorptive removal of the methyl orange (M_thO) dye from its aqueous solution. For the very first time, the antimycotic activity of the green synthesized ZP-ns was unveiled. The mycelial growth inhibition was obtained in a dose-dependent manner with significant (<em>P</em> &lt; 0.05) behavior compared to the control plates. The biosorption conditions using ZP-ns@Alg microbeads were optimized using the response surface methodology-based central composite design (RSM-CCD) to maximize the biosorption efficiency. The highest biosorptive efficiency was achieved at pH 4.0, biosorption dosage 0.07 g, contact time 50 min, dye concentration 100 mg/l, and shaking speed 100 rpm. The equilibrium data were more tailored to the pseudo-second order (PS) model with an R² of 0.9955 and a Langmuir isotherm (R² = 0.9945) with a maximum biosorptive capacity (q_max) of 166.95 mg/g and an average R_L value of 0.0003, indicating favorable biosorption. The removal capacity was reduced to ∼90 % after the 6th cycle, which is a robust signal that the developed biosorbent microbeads could be recycled and regenerated for a prolonged time. These results marked the application of ZP-ns as a novel antimycotic agent with excellent activities. Microbeads, made from low-cost biopolymers, can be applied to remediating environmental pollutants from wastewater.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"36 ","pages":"Article 103840"},"PeriodicalIF":6.7,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142421065","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 into the synergistic effects between deposited Fe oxides and dissolved organic matter in influencing perfluorooctanoic acid transport in saturated porous media","authors":"Yingna Xing ,&nbsp;Xin Chen ,&nbsp;Qi Li ,&nbsp;Lei Ji ,&nbsp;Xiaowen Fu ,&nbsp;Jianing Wang","doi":"10.1016/j.eti.2024.103838","DOIUrl":"10.1016/j.eti.2024.103838","url":null,"abstract":"<div><div>Perfluorooctanoic acid <strong>(</strong>PFOA) transport in the subsurface environment is relevant to drinking water safety, while the compounding effects of soil components on PFOA migration are poorly understood. Laboratory miscible-displacement experiments were conducted using saturated sand columns to explore how metal oxide surfaces and dissolved organic matter (DOM) jointly affect PFOA transport in porous media. Retardation factors indicated that Fe oxide coating inhibited PFOA migration due to electrostatic interaction. However, PFOA recovery rates changed insignificantly, decreasing by less than 4 % when the proportion of Fe oxide-coated sand reached 50 %. DOM (1 mg/L humic acid) in the pore water slightly decreased PFOA recovery rates (by about 10 %) in quartz sand, indicating the effect of hydrophobic interaction on PFOA migration. When the PFOA solution containing 1 mg/L humic acid was injected into the column containing Fe oxide-coated sand, PFOA recovery was significantly decreased by nearly 20 %, and the retardation factor was more than doubled. This could be attributed to the stronger hydrophobic effect provided by the higher DOM deposition on the Fe oxide surface. These results, supported by SEM-EDS, zeta potential, and model fitting data, highlight the microscopic mechanisms by which interactions between metal oxides and DOM influence PFOA transport. However, this inhibitory effect disappeared at higher humic acid concentrations (20 mg/L), indicating the risk of PFOA re-migration when the DOM concentration greatly exceeds the adsorption capacity of the media for it. The findings of this work have implications for predicting or controlling the environmental risks of PFOA in soil and groundwater.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"36 ","pages":"Article 103838"},"PeriodicalIF":6.7,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142421069","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":"Simultaneous nutrition removal and high-efficiency biomass accumulation by microalgae using cattle wastewater","authors":"Mingzhen Zhu ,&nbsp;Wenbo Sun ,&nbsp;Jiawen Xu,&nbsp;Xiaodong Long,&nbsp;Yingying Zhang,&nbsp;Hui Yang","doi":"10.1016/j.eti.2024.103837","DOIUrl":"10.1016/j.eti.2024.103837","url":null,"abstract":"<div><div>The development of the livestock industry has led to the discharge of large quantities of nutrient-rich livestock wastewater, posing a significant challenge to wastewater treatment. Improper treatment may pose potential threats to the environment and human health. Microalgae are of great interest due to their rich nutritional value and as potential agents for bioremediation of pollution in aquatic environments. In this study, mixture of 60 % cattle wastewater (CW) and 40 % BG-11, supplemented with equal parts glucose and sodium bicarbonate, was found to be optimal for high production of <em>Chlorella sorokiniana</em>. Under these conditions, the highest biomass, protein, lipid concentration of <em>C. sorokiniana</em> were 8.98×10¹⁰ cells/L, 11.82 g/L, 24.9 %, respectively, Whereas, the removal efficiencies of total nitrogen (TN), ammonia nitrogen, total phosphorus (TP), and chemical oxygen demand (COD) were 61.44 %, 98.99 %, 89.33 % and 65.81 %, respectively. These findings highlight the potential of <em>C. sorokiniana</em> in simultaneous CW treatment and nutritious microalgal biomass production.</div></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"36 ","pages":"Article 103837"},"PeriodicalIF":6.7,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142327266","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":"Azo dye bioremediation: An interdisciplinary path to sustainable fashion","authors":"Gajendra B. Singh ,&nbsp;Ankita Vinayak ,&nbsp;Gaurav Mudgal ,&nbsp;Kavindra Kumar Kesari","doi":"10.1016/j.eti.2024.103832","DOIUrl":"10.1016/j.eti.2024.103832","url":null,"abstract":"<div><p>Textile effluents constitute a significant source of environmental contamination due to the substantial discharge of recalcitrant azo dyes. These synthetic xenobiotic compounds, extensively employed across various industries, represent a predominant class of colorants. The persistence of azo dyes in aquatic ecosystems poses a formidable threat to biota, encompassing flora, fauna, and anthropogenic populations. These recalcitrant pollutants can infiltrate agricultural systems through irrigation practices, facilitating their entry into trophic networks and eliciting deleterious effects on human health. Conventional physico-chemical treatment methodologies have been implemented for the remediation of dye-laden wastewater; however, the inherent stability and color-fastness of azo dyes render the decolorization process arduous. Stringent environmental regulations have been promulgated to mitigate the discharge of these hazardous compounds into aquatic systems. Bioremediation emerges as a promising solution for the effective treatment of toxic synthetic dyes. This review elucidates biological decolorization technologies for azo dyes exhibiting carcinogenic, mutagenic, and phytotoxic properties. It explores microbial biodecolorization mechanisms, emphasizing the roles of bacteria, fungi, and algae, and their enzymes in the adsorption and degradation of dye molecules, facilitating their complete mineralization into innocuous entities. Strategies to enhance biodecolorization efficiencies, such as sequential aerobic-anaerobic decolorization and immobilization techniques, are also discussed. Immobilization of biological decolorizers enables their long-term efficient utilization. Various technologically advanced interdisciplinary approaches to mitigate azo dye problems have also been covered. This comprehensive review aims to guide researchers and environmentalists in devising effective treatment modalities for toxic dye remediation and environmental conservation.</p></div>","PeriodicalId":11725,"journal":{"name":"Environmental Technology & Innovation","volume":"36 ","pages":"Article 103832"},"PeriodicalIF":6.7,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2352186424003080/pdfft?md5=9bc9d099d4ba4c174e45d677f6f99b66&pid=1-s2.0-S2352186424003080-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142272562","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}