Environmental Technology and Innovation最新文献_第3页

A Light-Driving Magnetic Nanocomposite Based on Zn/Fe/Cu Embedded in HKUST-1 Applied for Adsorption/Degradation of Indigo Carmine and Pathogens 基于Zn/Fe/Cu的光驱动磁性纳米复合材料在HKUST-1上的吸附/降解靛蓝胭脂红和病原体的应用

Environmental Technology and Innovation Pub Date : 2023-11-01 DOI: 10.1016/j.eti.2023.103439

Peyman Ghorbani, Zahra Sadat Mojtabapour, Fatemeh Ganjali, Fereshteh Rasouli Asl, Mohadeseh Forouzandeh-Malati, Zahra Rashvandi, Amir Kashtiaray, Farhad Esmailzadeh, Simindokht Zarei-Shokat, Reza Taheri-Ledari, Ali Maleki

{"title":"A Light-Driving Magnetic Nanocomposite Based on Zn/Fe/Cu Embedded in HKUST-1 Applied for Adsorption/Degradation of Indigo Carmine and Pathogens","authors":"Peyman Ghorbani, Zahra Sadat Mojtabapour, Fatemeh Ganjali, Fereshteh Rasouli Asl, Mohadeseh Forouzandeh-Malati, Zahra Rashvandi, Amir Kashtiaray, Farhad Esmailzadeh, Simindokht Zarei-Shokat, Reza Taheri-Ledari, Ali Maleki","doi":"10.1016/j.eti.2023.103439","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103439","url":null,"abstract":"An environmentally friendly photocatalytic system (type-II heterojunction) is designed and utilized for rapid removal of Indigo carmine (IC) and pathogens from aqueous samples. This photocatalyst contains ZnFe2O4 magnetic NPs, CuO semiconductor, β-cyclodextrin (β-CD) charge transferor, and HKUST-1 light harvester. After the adsorption and photodegradation process, the nanocomposite was separated magnetically, and the supernatant was taken for the UV-Vis analysis. The maximum adsorption and photodegradation efficiency of 94.45% and 97.67% (pH = 5, in 35 minutes) were obtained under blue LED light (7.0 W) irradiation, due to the calculations based on UV-Vis spectrophotometer results. Simple preparation via a self-assembly route and facile separation through a superparamagnetic behavior (leading to great recovery) can be mentioned as the most brilliant excellence. Moreover, the photocatalytic performance of this magnetic nanocomposite was preserved after five recycle runs without any substantial reduction in photocatalytic activity. Also, employing a biopolymer, affordability, availability of the raw materials, good thermal stability, facile magnetic separation, simple operation, and high efficiency are upsides of the prepared nanocomposite, making it a superior photocatalyst to previous analogous systems. This nanocomposite (formulated as ZnFe2O4-CuO@β-CD)/HKUST-1) also exhibited antibacterial activity against Gram-positive and -negative strains. Based on BET (porosity) evaluations, the nanocomposite has rendered a surface area of 451.52 m2/g, which led to great adsorption results representing first-order and pseudo-second-order (Freundlich isotherm) kinetic models for the degradation and adsorption processes, respectively.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"44 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135664036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing methane production in dry anaerobic digestion of ruminant manures through substrates ratio regulation for strengthened microbial interactions 通过调节底物比例加强微生物相互作用，提高反刍动物粪便干式厌氧消化的甲烷产量

Environmental Technology and Innovation Pub Date : 2023-11-01 DOI: 10.1016/j.eti.2023.103389

Rui Wang, Jing Gu, Qianqi Wang, Sinan Jiang, Zeyue Wu, Jie Wang, Guoxue Li, Xiaoyan Gong

{"title":"Enhancing methane production in dry anaerobic digestion of ruminant manures through substrates ratio regulation for strengthened microbial interactions","authors":"Rui Wang, Jing Gu, Qianqi Wang, Sinan Jiang, Zeyue Wu, Jie Wang, Guoxue Li, Xiaoyan Gong","doi":"10.1016/j.eti.2023.103389","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103389","url":null,"abstract":"This study aimed to investigate the anaerobic digestion (AD) performance of sheep manure and cow dung in wet (TS 8%) and dry (TS 20%) conditions with five SM/CD ratios (4:0, 3:1, 2:2, 1:3, and 0:4) using batch processes. The results demonstrated that the dry AD system with an SM/CD ratio of 1:3 (DP4) exhibited a high degradation rate of volatile fatty acids (VFAs) and maintained optimal methane (CH4) production, compared to all treatments in wet AD. High-throughput sequencing analysis revealed that DP4 promoted the relative abundance of hydrolytic bacteria (e.g., Clostridium sensu stricto), acidogens (e.g., Terrisporobacter), and syntrophic acetogens (e.g., Petrimonas). These microbial communities actively facilitated organic biodegradation, VFAs generation, and conversion. Additionally, co-occurrence network analysis showed stronger syntrophic relationships between bacteria and methanogens within the dry AD system especially in DP4 compared to the wet AD system. The symbiotic relationship, connected by the mediators, especially Petrimonas, facilitated the conversion of VFAs and H2/CO2 into CH4 through acetoclastic pathway dominated by Methanosarcina and hydrogenotrophic pathways dominated by Methanobrevibacter and Methanosphaera, respectively. This study highlights the potential of maximizing CH4 production in dry AD with specific feedstock ratio through positive microbial interactions.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"125 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135011648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Waste fish scale for the preparation of bio-nanocomposite film with novel properties 利用废弃鱼鳞制备具有新型性能的生物纳米复合膜

Environmental Technology and Innovation Pub Date : 2023-11-01 DOI: 10.1016/j.eti.2023.103386

S Shalma, Dibyajyoti Haldar, Gopinath Halder, Anil Kumar Patel, Reeta Rani Singhania, Ashok Pandey

{"title":"Waste fish scale for the preparation of bio-nanocomposite film with novel properties","authors":"S Shalma, Dibyajyoti Haldar, Gopinath Halder, Anil Kumar Patel, Reeta Rani Singhania, Ashok Pandey","doi":"10.1016/j.eti.2023.103386","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103386","url":null,"abstract":"The aim of this work was to study utilization of waste fish scales to develop a bio-nanocomposite films with corn starch, embedded with ZnO nanoparticles and turmeric as an alternative to synthetic plastics films to pack the food. Four different types of bio-nanocomposite films were prepared using varying amounts of fish scale powder and corn starch. The films were examined for their physical and chemical characteristics, including texture, colour, solubility in hot water, tensile strength, organic content, and shape. The films were characterized by FTIR, UV–Vis spectrophotometry and SEM. The developed bio-nanocomposite films demonstrated enhanced water barrier, mechanical and antimicrobial properties. The unique features of the bio-nanocomposite with pH indication property demonstrated their potential usage in food packaging applications. Overall, bio-nanocomposite film showed reduced spoilage and increased shelf-life. The results could be of great relevance for the sustainable utilization of waste fish scale and replacement of synthetic polymers films for food packaging as an alternative with environmental sustainability.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"116 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135012292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimization and Microbial Community Analysis for Anaerobic Digestion of Water Hyacinth (Eichhornia crassipes) with Waste Sludge at Different Solid Contents and Temperatures 不同固含量和温度下废污泥厌氧消化水葫芦的优化及微生物群落分析

Environmental Technology and Innovation Pub Date : 2023-11-01 DOI: 10.1016/j.eti.2023.103395

Gülşah Öztep, Tülay Güngören-Madenoğlu, Güven Özdemir, Eda Işık, Habibe Serez, Nalan Kabay, Mithat Yüksel

{"title":"Optimization and Microbial Community Analysis for Anaerobic Digestion of Water Hyacinth (Eichhornia crassipes) with Waste Sludge at Different Solid Contents and Temperatures","authors":"Gülşah Öztep, Tülay Güngören-Madenoğlu, Güven Özdemir, Eda Işık, Habibe Serez, Nalan Kabay, Mithat Yüksel","doi":"10.1016/j.eti.2023.103395","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103395","url":null,"abstract":"In this study, optimum operating conditions for anaerobic digestion of water hyacinth (Eichhornia crassipes) with waste sludge was investigated at varying total solid (TS) content of the digestion solution (3.3, 4.3, 5.3, 6.3, 7.3 and 8.3%) and digestion temperature (35, 40, 45, 50 and 55 °C) to produce methane with high yield. The highest biogas yield reached experimentally was 163.2 mL/g TVS (with high CH4 content of 81.1 vol%) at 6.3% of TS content and digestion temperature of 35 °C. Kinetic parameters were estimated by using modified Gompertz, Cone and first-order kinetic models in which modified Gompertz model gave the lowest fitting errors (-1.0–3.7%). The effect of temperature on methane production rate was simulated by Ratkowsky model and optimum digestion temperature was found between 41.5 and 44 °C for maximum methane production at 6.3% TS. The experimental methane yields were 61.9–132.3 mL CH4/g TVS. The metagenomic sequencing was used to characterize microbial community structure of the anaerobic digestate at varying conditions and acetoclastic/hydrogenothrophic methanogenesis was equally dominated methane-producing pathways. The most abundant bacterial populations were found to be Proteobacteria, Firmicutes, Chloroflexi and Actinobacteria. Based on alpha diversity indices, it can be concluded that effect of digestion temperature on microbial richness and diversity was higher than the effect of TS content.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"78 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135061403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact on the microbial population during biological volatile fatty acid production from olive mill solid waste 橄榄厂固体废弃物生物挥发性脂肪酸生产过程中对微生物种群的影响

Environmental Technology and Innovation Pub Date : 2023-11-01 DOI: 10.1016/j.eti.2023.103409

E. Jiménez-Páez, A. Serrano, J. Purswani, D. Correa-Galeote, J. Cubero-Cardoso, F.G. Fermoso

{"title":"Impact on the microbial population during biological volatile fatty acid production from olive mill solid waste","authors":"E. Jiménez-Páez, A. Serrano, J. Purswani, D. Correa-Galeote, J. Cubero-Cardoso, F.G. Fermoso","doi":"10.1016/j.eti.2023.103409","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103409","url":null,"abstract":"Volatile fatty acids (VFAs) revalorisation from waste products are key in achieving industrial sustainability and circular economic goals. Hence, the objective of this work was to correlate the adaptability of the microbial community in olive mill solid waste (OMSW) anaerobic fermentation processes, to the production of VFAs under different pH conditions, i.e. under acidic (pH 4 &5), neutral (pH 6 & 7) and alkaline conditions (pH 9 & 10). At neutral conditions, anaerobic digestion exhibited minimal accumulation of VFAs, as they were primarily biotransformed to methane, where no significant changes in the microbial community were observed. At acidic conditions, a diverse profile of VFAs were present in the reactors, although the VFA production was limited to around 20% of fed OMSW. Despite the low accumulation, the VFA profile at pH 5 was more complex than those at alkaline conditions, accounting propionic acid as the main VFA compound produced at pH 5 (60% of the total VFAs). Acidic conditions entailed a shift in the microbial composition compared to the initial inoculum, although the reactors maintained similar diversity indices. At alkaline conditions, around 50% of the fed OMSW was accumulated as VFAs, mainly as acetic acid. Overall, a lower diversity and higher dominance corresponded to a less diverse VFAs profile, such as the preponderance of acetic acid correlated with a microbial diversity decrease and the increased dominance of Tissirella.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"39 16","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135062296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improving plant availability of recycled phosphorus with organic acids 有机酸提高植物对再生磷的利用率

Environmental Technology and Innovation Pub Date : 2023-11-01 DOI: 10.1016/j.eti.2023.103401

Riikka Keskinen, Jari Hyväluoma, Johanna Nikama, Tuomo Sainio, Kari Ylivainio

{"title":"Improving plant availability of recycled phosphorus with organic acids","authors":"Riikka Keskinen, Jari Hyväluoma, Johanna Nikama, Tuomo Sainio, Kari Ylivainio","doi":"10.1016/j.eti.2023.103401","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103401","url":null,"abstract":"Increasing the efficiency of phosphorus (P) use through nutrient circularity is essential for securing P sufficiency and reducing pollution. The release of P in recycled materials can be enhanced with organic acids produced from cellulose. In this study, fertilisers based on sewage sludge (SS) and poultry manure (BR) were treated with increasing levels (0%, 8%, and 20%) of hydroxy carboxylic and carboxylic acid mixture to determine the effect of acidification on the availability of P and other selected elements. According to sequential extractions, acidification increased the share of labile P in both products. In SS, which was dominated by refractory metal phosphates, a higher acid dose was required for the effect, and a smaller share of total P was transformed than in the BR, which was already rich in easily accessible P. Besides P, acidification increased the mobility of several elements but induced no harmful element accumulation in ryegrass leaves. The increased P lability recorded by fractionation in SS was reflected in ryegrass P uptake, cumulative yield, apparent P recovery, and mineral-P equivalence. In BR exhibiting superiority to mineral P, the effect of acidification on plant growth and P uptake was negative. Acidification treatment offers an option to enhance the plant availability of circular P, but the treatment needs to be tailored according to product characteristics. Optimising the application rate and acid composition might allow increasing effectiveness while avoiding negative growth effects.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"44 43","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135062406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Leveraging anaerobic biodegradation of tetracycline in anaerobic digestion systems with different operational modes 利用四环素在不同操作模式厌氧消化系统中的厌氧生物降解

Environmental Technology and Innovation Pub Date : 2023-11-01 DOI: 10.1016/j.eti.2023.103373

Yuyin Wang, Guangxue Wu

{"title":"Leveraging anaerobic biodegradation of tetracycline in anaerobic digestion systems with different operational modes","authors":"Yuyin Wang, Guangxue Wu","doi":"10.1016/j.eti.2023.103373","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103373","url":null,"abstract":"Antibiotics such as tetracycline in wastewater may cause the operation failure of anaerobic digestion systems. Two operational modes, continuous-flow reactors (CFRs) and sequencing batch reactors (SBRs), were operated with or without the addition of tetracycline to examine the influence of tetracycline on system performance, tetracycline removal, metabolic activity, and microbial communities. Tetracycline inhibited the removal of chemical oxygen demand (COD) by 23.9% in CFRs and 20.5% in SBRs, and led to the accumulation of volatile fatty acids (VFAs). Also, the maximum methane production rate was inhibited by 24.5% in CFRs and 48.8% in SBRs due to the existence of tetracycline, while the maximum methane production was reduced by 32.8% in CFRs and 13.8% in SBRs. CFRs exhibited a better recovery capacity during COD shock loading and demonstrated superior propionate degradation and methane production capabilities. CFRs achieved better tetracycline removal capacity compared to SBRs. Biodegradation was found to be the dominant tetracycline removal pathway, accounting for 88.9% (CFRs) and 82.0% (SBRs). Long-term exposure to tetracycline decreased archaea abundances and inhibited the enrichment of hydrolytic-acidogenic bacteria (Mesotoga and Syner-01). Meanwhile, CFRs provided a more conducive environment for the enrichment of these microorganisms. The presence of Geobacter in conjunction with the detected ethanol in a typical reaction cycle in CFRs suggested the potential presence of direct interspecies electron transfer, elucidating the enhanced pollutant removal of CFRs. Additionally, Trichococcus, a genus associated with tetracycline removal, was found to be highly enriched with the long-term dosage of tetracycline.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"490 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136371628","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Aged biochar for simultaneous removal of Pb and Cd from aqueous solutions: Method and mechanism 陈化生物炭同时去除水溶液中的铅和镉:方法和机理

Environmental Technology and Innovation Pub Date : 2023-11-01 DOI: 10.1016/j.eti.2023.103368

Xinyue Li, Tianyi Wang, Yilin Li, Tonglinxi Liu, Xiulan Ma, Xing Han, Yujun Wang

{"title":"Aged biochar for simultaneous removal of Pb and Cd from aqueous solutions: Method and mechanism","authors":"Xinyue Li, Tianyi Wang, Yilin Li, Tonglinxi Liu, Xiulan Ma, Xing Han, Yujun Wang","doi":"10.1016/j.eti.2023.103368","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103368","url":null,"abstract":"In this study, we prepared maize stover biochar and used artificial simulated aging to prepare three types of aged biochar. The effects of aging on the adsorption capacity of Pb and Cd of biochar were studied. It was found that the pH, ash, and aromaticity of the aged biochar decreased compared to fresh maize straw biochar. On the contrary, the polarity, oxygenated functional groups, specific surface area, and average pore size of the aged biochar increased. The sorption behavior of Pb2+ and Cd2+ on biochar can be well explained by quasi-second-order kinetics and the Langmuir equation. The maximum adsorption of Pb2+ in the single metal system was CBC-N (74.401 mg g−1)>CBC (72.959 mg g−1)>CBC-H (69.421 mg g−1)>CBC-F (66.460 mg g−1), the maximum adsorption of Cd2+ was CBC-N (52.983 mg g−1)> CBC-H (52.728 mg g−1) > CBC-F (50.692 mg g−1) > CBC (45.966 mg g−1). The adsorption of both Pb2+ and Cd2+ by biochar is lower in the binary metal system than in the single metal system, implying a competitive relationship and that biochar is more selective for Pb2+ than Cd2+. The mechanisms for removing Pb2+ and Cd2+ from solution by aged biochar consist mainly of pore filling, electrostatic adsorption, ion exchange, mineral precipitation, π−π interaction, and surface complexation. This paper demonstrates that aged biochar is an ideal adsorbent but that environmental changes and pollutant types should be considered in practical applications.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"43 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136307181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The impact of electrospinning conditions on the properties of enzymes immobilized on electrospun materials: Exploring applications and future perspectives 静电纺丝条件对固定化酶在静电纺丝材料上性能的影响:探索应用和未来展望

Environmental Technology and Innovation Pub Date : 2023-11-01 DOI: 10.1016/j.eti.2023.103408

Katarzyna Jankowska, Ziran Su, Teofil Jesionowski, Jakub Zdarta, Manuel Pinelo

{"title":"The impact of electrospinning conditions on the properties of enzymes immobilized on electrospun materials: Exploring applications and future perspectives","authors":"Katarzyna Jankowska, Ziran Su, Teofil Jesionowski, Jakub Zdarta, Manuel Pinelo","doi":"10.1016/j.eti.2023.103408","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103408","url":null,"abstract":"The electrospinning technique allows the production of materials from a wide range of polymers and biopolymers with designed and specified properties which positively affect the stability of the enzyme-support interactions and the activity of immobilized enzymes. This review focuses on electrospun materials, their fabrication, features and application in enzyme immobilization processes, and on electrospun-based heterogeneous biocatalysts in various fields such as environmental protection, biosensing, the food industry, medicine and pharmacy. Though numerous review articles have recently been published on enzyme immobilization, there is a lack of comprehensive studies addressing the effect of the functional and morphological characteristics of electrospun materials on the properties and practical application of the immobilized enzymes. The primary challenge in the production of electrospun fibers lies in optimizing the electrospinning parameters, including component concentration, voltage, needle tip-to-collector distance, flow rate, temperature, and humidity. Mismatched conditions or precursors can lead to failures in fiber formation and the emergence of beads within the fibers. It can compromise the mechanical stability of the materials produced and potentially impact the properties of enzyme immobilization and its potential applications. Our overview will therefore be valuable for the selection and production of electrospun materials with special applications in enzyme immobilization for various groups of enzymes. We also summarize and highlight current research gaps and possible future applications of electrospun fibers with immobilized enzymes.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135062124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sodium hypochlorite-assisted osmotic backwashing for mitigating forward osmosis membrane fouling during pre-concentrating wastewater 次氯酸钠辅助渗透反冲洗减轻预浓缩废水中正向渗透膜污染

Environmental Technology and Innovation Pub Date : 2023-11-01 DOI: 10.1016/j.eti.2023.103402

Hai Duc Minh Tran, Hideaki Sano, Sandrine Boivin, Naoki Ohkuma, Mitsuharu Terashima, Takahiro Fujioka

{"title":"Sodium hypochlorite-assisted osmotic backwashing for mitigating forward osmosis membrane fouling during pre-concentrating wastewater","authors":"Hai Duc Minh Tran, Hideaki Sano, Sandrine Boivin, Naoki Ohkuma, Mitsuharu Terashima, Takahiro Fujioka","doi":"10.1016/j.eti.2023.103402","DOIUrl":"https://doi.org/10.1016/j.eti.2023.103402","url":null,"abstract":"Forward osmosis (FO) membrane has drawn substantial attention to pre-concentrating organic matter in wastewater for biogas production. However, membrane fouling control is an ongoing challenge for the feasibility of the FO system. Although chemical cleaning using a caustic solution (e.g., solution pH = 11) can remove organic foulants on the polyamide-based membranes, it can damage cellulose triacetate (CTA)-based FO membrane due to hydrolysis. This study assessed the efficacy of sodium hypochlorite (NaClO)-assisted osmotic backwashing to mitigate CTA-based FO membrane fouling during pre-concentrating primary wastewater effluent. The cleaning strategy employing a low concentration of NaClO showed a restoration of water flux higher than conventional hydraulic flushing and sole osmotic backwashing. The water flux after NaClO-assisted osmotic backwashing (NaClO concentrations = 10–80 mg/L) reached 97–102%. Irreversible foulants on the membrane surface were fully removed by NaClO concentration from 20 to 80 mg/L. During four filtration cycles using a 40 mg-NaClO/L cleaning solution, the reverse salt flux increased from 4.3 to 6.3 g/m2h. This indicates that for a long-term operation, applying lower concentrations of NaClO (e.g., 20 mg/L) may be needed to avoid the changes in reverse salt flux. This study suggests that FO membranes during pre-concentrating primary wastewater effluent can be stably operated with NaClO-assisted osmotic backwashing.","PeriodicalId":11899,"journal":{"name":"Environmental Technology and Innovation","volume":"59 44","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135062389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0