Journal of Environmental Chemical Engineering最新文献_第6页

Mechanism and application of environmental engineering and civil engineering: From biological nanoarchitectonics to system engineering

IF 7.4 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2025-02-01 DOI: 10.1016/j.jece.2024.115247

Peidong Su , Meiguangzi Guo , Qing Wen , Xiaoping Zhong , Zaining Li , Tingting Cui , Chunhui Zhang , Junke Zhang , Wentao Jiao , Lin Li

Over the past two decades, microbial-induced carbonate precipitation (MICP) has emerged as a promising biomineralization technology mediated by specific bacteria. With its simple and controllable characteristics, MICP has shown significant potential for various applications such as remediation of cracks, corrosion prevention in concrete, and treatment of heavy metals. This review provides an in-depth review of the fundamental pathways, mechanisms, operational factors, and application approaches of the MICP process in environmental and civil engineering. Moreover, as an important carbonate precipitation process, the potential of MICP technology in CO₂ capture, utilization, and storage (CCUS) and the main challenges were also discussed thoroughly, especially in treating alkaline solid waste. This review can provide a crucial reference for MICP in CCUS and assist in CO₂ control. While MICP is undoubtedly a mainstream engineering technology, the future of MICP lies in combination with other techniques to ensure the application of this technology in interdisciplinary processes.

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引用次数: 0

Manganese doping generates oxygen vacancies to enhance the performance of cobalt oxyhydroxide in activating peroxymonosulfate

IF 7.4 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2025-02-01 DOI: 10.1016/j.jece.2024.115042

Wenchao Zhang , Yufei Han , Yiting Guo , Wenhao Zhang , Fei Xu , Weizhi Zhou

A process for activating peroxymonosulfate using Mn-doped cobalt oxyhydroxide (CoOOH) was developed, achieving efficient removal of organic pollutant. Targeting sulfamethoxazole (SMX) as the pollutant, the reaction rate of cobalt hydroxide with a 10 % manganese doping (CoMn10) increased by more than tenfold compared to undoped CoOOH. Under conditions of 0.3 g/L catalyst and 0.5 mM PMS, 10 mg/L SMX was removed within 10 min. The activation of PMS to degrade SMX is mainly based on heterogeneous catalytic reaction. Quenching experiments, electron paramagnetic resonance spectra and methyl phenyl sulfoxide (PMSO) probe confirmed the presence of multiple reactive oxygen species in the CoMn10/PMS system, including sulfate radicals, singlet oxygen, high-valent metals, and electron transfer. It was resistant to multiple anions (Cl⁻, NO₃⁻, SO₄²⁻) and has catalytic stability in real water. CoMn10/PMS system has the ability to degrade a variety of pollutants efficiently. The introduction of manganese facilitates the formation of oxygen vacancies. The density functional theory (DFT) computation showed that manganese increased the adsorption energy and electron transport flux of CoOOH, enhanced the chemical activity of CoOOH, and the structure of PMS adsorbed on CoMn10 was more easily adsorbed and cleavaged.

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引用次数: 0

Algal synthesis of ZnO-NPs: Effect of the synthesis parameters in the characteristics and properties of the nanomaterial

IF 7.4 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2025-02-01 DOI: 10.1016/j.jece.2024.115112

J.D.A. Loa, M.O. Hernández-Jiménez, N.G. Rojas-Avelizapa

The Zinc Oxide Nanoparticles (ZnO-NPs) are a semiconductor material used in medicine, cosmetic, food, ceramics, manufacturing and electronics with high relevance in terms of their adsorption, photocatalytic, fluorescence, antimicrobial and toxicological properties. These properties of ZnO-NPs depend of morphological characteristics given by the methods and synthesis parameters. ZnO-NPs obtained by green synthesis using algae can exhibit different physicochemical characteristics and properties. The present review identifies and discusses the main parameters that affect the morphological characteristics and physicochemical properties of ZnO-NPs by using algae. The review includes available information in web of science database, where algal synthesis of ZnO-NPs haven been reported in thirty-three extracts of different species of algae using four zinc salts. Based on literature, it was possible to identify that pH, biological and inorganic precursors are the main parameters that affect the size, shape, and coating of nanoparticles, although other parameters also affect the morphology of ZnO-NPs such as the temperature, reaction time, drying and calcination, as well as the concentration of precursors but more research is needed to evidence their role and/or mechanisms. An important finding during review was the scarce information about the type of bioactive compounds, mechanisms, and reactions involved in algae synthesis of ZnO-NPs; having information will allow a better understanding of the synthesis parameters on the morphological characteristics of nanoparticles and the relationship between them and the properties of ZnO-NPs.

氧化锌纳米粒子（ZnO-NPs）是一种半导体材料，可用于医药、化妆品、食品、陶瓷、制造和电子领域，在吸附、光催化、荧光、抗菌和毒理学特性方面具有很高的相关性。ZnO-NPs 的这些特性取决于合成方法和合成参数所赋予的形态特征。利用藻类进行绿色合成获得的 ZnO-NPs 可表现出不同的物理化学特征和特性。本综述确定并讨论了影响利用藻类合成 ZnO-NPs 形态特征和理化性质的主要参数。综述包括科学网数据库中的可用信息，其中有 33 种不同种类藻类的提取物利用四种锌盐合成 ZnO-NPs 的报道。根据文献，可以确定 pH 值、生物和无机前体是影响纳米粒子大小、形状和涂层的主要参数，尽管其他参数也会影响 ZnO-NPs 的形态，如温度、反应时间、干燥和煅烧，以及前体的浓度，但还需要更多的研究来证明它们的作用和/或机制。综述中的一个重要发现是，有关藻类合成 ZnO-NPs 所涉及的生物活性化合物类型、机制和反应的信息很少；掌握这些信息将有助于更好地理解合成参数对纳米粒子形态特征的影响，以及这些参数与 ZnO-NPs 性能之间的关系。

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引用次数: 0

Exploring the photocatalytic performance of (CH3NH3)2AgInBr6, a Pb-free perovskite, and the composite with a MgAlTi layered double hydroxide for air purification purposes 探索(CH3NH3)2AgInBr6（一种无铅过氧化物）及其与 MgAlTi 层状双氢氧化物的复合材料在空气净化方面的光催化性能

IF 7.4 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2025-02-01 DOI: 10.1016/j.jece.2024.114934

José Estrada-Pomares , María de los Ángeles Oliva , Luis Sánchez , Gustavo de Miguel

Pb-free metal halide perovskites (MHPs) have lately been employed in different types of photocatalytic applications due to their high absorption in the visible region and excellent electrochemical properties. In this work, the In-based (CH₃NH₃)₂AgInBr₆ (MAIB) perovskite has been synthesized using a solvent-free mechanochemical method and the photocatalytic activity has been assessed in the NO removal reaction. The ball milling approach has been employed to obtain microcrystals with a high degree of crystallinity. The diffuse reflectance spectroscopy reveals a band gap energy of 3.44 eV but with an absorption tail covering the visible region. The photocatalytic experiments reveal a high NO abatement of 92 % and 32 % under UV-Vis and visible irradiation, respectively. The cyclability of the MAIB material was investigated during six cycles obtaining an almost nearly constant performance. In a novel approach, the low selectivity showed by the MAIB perovskite in the DeNOx process was circumvented by the preparation of a composite with the MgAlTi layered double hydroxide (LDH). The presence of MgAlTi-LDH avoids the release of NO₂ during the photochemical oxidation of the NO gas. Under visible light, the MAIB perovskite is the active species leading to the production of superoxide radicals, which initiate the photochemical process. The MAIB/LDH composite exhibited good efficiency and outstanding selectivity to remove NO gas, together with long-term stability when irradiated under visible light.

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引用次数: 0

Waste to treasure: Upcycling waste express packing to sustainable packaging materials

IF 7.4 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2025-02-01 DOI: 10.1016/j.jece.2024.115016

Shusheng Huang , Mingyou Wang , Yuting Dai , Chen Deng , Songlin Xue , Fengxian Qiu , Tao Zhang

Waste express packaging, composed of plastic or cellulose materials, has attracted increasing research attention due to the rapid development of the logistics industry, which remains a challenge in hazardous solid waste management. Herein, the concept of “turning waste to treasure” is proposed based on resource utilization of waste plastic packaging and cellulose packaging materials to refabricate the hybrid membrane material for food packaging application. To do this, the polyethylene terephthalate/cellulose@Mg-Al layered double hydroxide (PET/cellulose@LDH) membrane was fabricated by in-situ growth LDH nanosheets on the surface of cellulose, followed by hydrophobic modification, and then electrospinning PET fiber. The obtained PET/cellulose@LDH membrane shows an high hydrophobic properties with a static water contact angle of 130°, which makes it less susceptible to contaminant adhesion during application. In outdoor test, it is demonstrated that the PET/cellulose@LDH membrane can be as large as 5 ℃ cooler than commercial food packaging. More importantly, the PET/cellulose@LDH membrane also exhibits excellent breathability and mechanical properties improving its practicability in the food packaging field. Therefore, the waste-to-resource strategy for resource utilization of waste express packaging can not only reduce the environmental pollution, but also develop an inexpensive and efficient packaging material with potential applications in the food packaging field.

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引用次数: 0

A new era in catalysis: Combining Al, DFT, single atom catalysis, and comprehensive characterizations applied to catalytic oxidation of C1-C4 volatile organic compounds

IF 7.4 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2025-02-01 DOI: 10.1016/j.jece.2024.115282

Suryamol Nambyaruveettil, Labeeb Ali, Mohammednoor Altarawneh

This review paper explores cutting-edge approaches in the catalytic oxidation of C₁-C₄ volatile organic compounds (VOCs), a critical area for environmental protection and industrial processes. The paper examines recent advancements in catalyst design methodologies, emphasizing the crucial relationship between molecular-level engineering and macroscopic material properties. Emerging materials and structures that show promise in enhancing catalytic performance are highlighted, including novel metal-organic frameworks (MOF), hierarchical porous materials, and single-atom catalysts. The growing role of computational techniques in predicting and optimizing catalyst behavior is explored, from density functional theory calculations to machine learning approach. Additionally, the review discusses how innovative characterization methods, such as in situ spectroscopy and advanced microscopy techniques, are driving catalyst development by providing unprecedented insights into reaction mechanisms and active site structures. This comprehensive review aims to provide researchers and industry professionals with a thorough understanding of the current state and future directions in catalytic oxidation of light VOCs, paving the way for more efficient and sustainable catalytic systems.

{"title":"A new era in catalysis: Combining Al, DFT, single atom catalysis, and comprehensive characterizations applied to catalytic oxidation of C1-C4 volatile organic compounds","authors":"Suryamol Nambyaruveettil, Labeeb Ali, Mohammednoor Altarawneh","doi":"10.1016/j.jece.2024.115282","DOIUrl":"10.1016/j.jece.2024.115282","url":null,"abstract":"<div><div>This review paper explores cutting-edge approaches in the catalytic oxidation of C<sub>1</sub>-C<sub>4</sub> volatile organic compounds (VOCs), a critical area for environmental protection and industrial processes. The paper examines recent advancements in catalyst design methodologies, emphasizing the crucial relationship between molecular-level engineering and macroscopic material properties. Emerging materials and structures that show promise in enhancing catalytic performance are highlighted, including novel metal-organic frameworks (MOF), hierarchical porous materials, and single-atom catalysts. The growing role of computational techniques in predicting and optimizing catalyst behavior is explored, from density functional theory calculations to machine learning approach. Additionally, the review discusses how innovative characterization methods, such as <em>in situ</em> spectroscopy and advanced microscopy techniques, are driving catalyst development by providing unprecedented insights into reaction mechanisms and active site structures. This comprehensive review aims to provide researchers and industry professionals with a thorough understanding of the current state and future directions in catalytic oxidation of light VOCs, paving the way for more efficient and sustainable catalytic systems.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"13 1","pages":"Article 115282"},"PeriodicalIF":7.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143181583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Biorecovery of platinum group metals to nanoparticles: Current status, prospects, and challenges

IF 7.4 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2025-02-01 DOI: 10.1016/j.jece.2024.115244

Yue Wang , Zhuo Zhen , Rong Zhao , Jie Yang , Hui Jia , Jie Wang

With the penetration of automobiles, spent automobile catalysts are the major secondary source of Platinum group metals. Spent automotive catalyst has higher quantities of platinum group metals than natural ores. Recovering platinum group metals from spent automotive catalysts has the potential to yield significant economic and environmental benefits. Conventional recycling techniques necessitate the use of several chemical reagents or the deployment of high-tech equipment and significant energy consumption, which inevitably results in the generation of toxic and harmful substances. However, biorecovery processes are regarded as viable options for Platinum group metals recovery. The substantial ability of microorganisms to bioreduce metal ions may obtain metal nanoparticles of varying morphologies and sizes through the action of various enzymes (reductase, hydrogenase) and proteins. This review summarizes the current process of biosynthesis of Platinum group metal nanoparticles, as well as potential synthesis mechanisms. Meanwhile, the specific applications of microbial sourced nanoparticles in medicine, catalytic environmental pollutants, and biosensors are discussed, and the future development of microbial nanomaterials synthesis has been further prospected.

{"title":"Biorecovery of platinum group metals to nanoparticles: Current status, prospects, and challenges","authors":"Yue Wang , Zhuo Zhen , Rong Zhao , Jie Yang , Hui Jia , Jie Wang","doi":"10.1016/j.jece.2024.115244","DOIUrl":"10.1016/j.jece.2024.115244","url":null,"abstract":"<div><div>With the penetration of automobiles, spent automobile catalysts are the major secondary source of Platinum group metals. Spent automotive catalyst has higher quantities of platinum group metals than natural ores. Recovering platinum group metals from spent automotive catalysts has the potential to yield significant economic and environmental benefits. Conventional recycling techniques necessitate the use of several chemical reagents or the deployment of high-tech equipment and significant energy consumption, which inevitably results in the generation of toxic and harmful substances. However, biorecovery processes are regarded as viable options for Platinum group metals recovery. The substantial ability of microorganisms to bioreduce metal ions may obtain metal nanoparticles of varying morphologies and sizes through the action of various enzymes (reductase, hydrogenase) and proteins. This review summarizes the current process of biosynthesis of Platinum group metal nanoparticles, as well as potential synthesis mechanisms. Meanwhile, the specific applications of microbial sourced nanoparticles in medicine, catalytic environmental pollutants, and biosensors are discussed, and the future development of microbial nanomaterials synthesis has been further prospected.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"13 1","pages":"Article 115244"},"PeriodicalIF":7.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143181589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Construction of MnOx with abundant surface hydroxyl groups for efficient ozone decomposition

IF 7.4 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2025-02-01 DOI: 10.1016/j.jece.2024.115048

Xiao Chen , Changcheng Zhou , Chonglai Chen , Chaoqun Bian , Ying Zhou , Hanfeng Lu

Designing and constructing stable and high-performance catalysts for room-temperature ozone decomposition under humid conditions remains a significant challenge. Herein, we report manganese oxide (MnO_x) rich in surface hydroxyl groups (-OH), synthesized through a facile three-step process combining solid-state grinding, heat treatment, and hydrothermal activation using potassium permanganate and ascorbic acid as precursors. The as-prepared catalyst (MnO_x-A) demonstrated remarkable stability with 100 % ozone conversion maintained for 240 min under ≤ 50 % relative humidity (RH). Notably, it achieved 90 % ozone conversion after 240 min even under 90 % RH, surpassing its performance (79 % conversion) at 70 % RH. Through comprehensive characterization and density functional theory calculations, we revealed that the abundant surface -OH groups effectively mitigate the water-induced deactivation of MnO_x during room-temperature catalytic ozone decomposition under humid conditions. Furthermore, we established a correlation between the catalytic activity of -OH groups and the manganese valence state. These findings provide valuable insights for the rational design of highly efficient and stable catalysts for practical ozone elimination applications.

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引用次数: 0

Silver nanoparticles supported on short magnetic PVA/PEI nanofibers for the reduction of 4-nitrophenol

IF 7.4 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2025-02-01 DOI: 10.1016/j.jece.2024.115054

Yujiao Zou , Chenyu Li , Ni Li , Yili Zhao

Silver nanoparticles (Ag NPs)-based nanomaterials are effective catalysts for a wide range of reactions. The recyclability and efficient catalytic properties of Ag-based nanocatalysts have been the focus of significant research interest. Herein, to address these challenges, we incorporated Fe₃O₄ nanoparticles (NPs) into a polyvinyl alcohol/polyethyleneimine (PVA/PEI) solution to fabricate PVA/PEI@Fe₃O₄ nanofibrous mats via electrospinning. Subsequently, the magnetic nanofibrous mats were homogenized to produce short magnetic nanofibers, which can be easily separated from the solution using a magnet. These short PVA/PEI@Fe₃O₄ nanofibers were then immersed in an aqueous solution of AgNO₃ to adsorb and reduce Ag ions, resulting in the formation of Ag NPs with an average diameter of approximately 15 nm, uniformly dispersed on the nanofiber surface. The resulting short PVA/PEI@Fe₃O₄/Ag nanofibers exhibit excellent catalytic activity for the reduction of 4-NP, achieving a high conversion rate of 97.0 %. Furthermore, they demonstrated remarkable recyclability, maintaining high catalytic activity throughout six consecutive cycles. The short magnetic nanofibers proposed in this study are anticipated to facilitate the practical application of electrospun nanofibers in the catalytic removal of pollutants.

{"title":"Silver nanoparticles supported on short magnetic PVA/PEI nanofibers for the reduction of 4-nitrophenol","authors":"Yujiao Zou , Chenyu Li , Ni Li , Yili Zhao","doi":"10.1016/j.jece.2024.115054","DOIUrl":"10.1016/j.jece.2024.115054","url":null,"abstract":"<div><div>Silver nanoparticles (Ag NPs)-based nanomaterials are effective catalysts for a wide range of reactions. The recyclability and efficient catalytic properties of Ag-based nanocatalysts have been the focus of significant research interest. Herein, to address these challenges, we incorporated Fe<sub>3</sub>O<sub>4</sub> nanoparticles (NPs) into a polyvinyl alcohol/polyethyleneimine (PVA/PEI) solution to fabricate PVA/PEI@Fe<sub>3</sub>O<sub>4</sub> nanofibrous mats <em>via</em> electrospinning. Subsequently, the magnetic nanofibrous mats were homogenized to produce short magnetic nanofibers, which can be easily separated from the solution using a magnet. These short PVA/PEI@Fe<sub>3</sub>O<sub>4</sub> nanofibers were then immersed in an aqueous solution of AgNO<sub>3</sub> to adsorb and reduce Ag ions, resulting in the formation of Ag NPs with an average diameter of approximately 15 nm, uniformly dispersed on the nanofiber surface. The resulting short PVA/PEI@Fe<sub>3</sub>O<sub>4</sub>/Ag nanofibers exhibit excellent catalytic activity for the reduction of 4-NP, achieving a high conversion rate of 97.0 %. Furthermore, they demonstrated remarkable recyclability, maintaining high catalytic activity throughout six consecutive cycles. The short magnetic nanofibers proposed in this study are anticipated to facilitate the practical application of electrospun nanofibers in the catalytic removal of pollutants.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"13 1","pages":"Article 115054"},"PeriodicalIF":7.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143182705","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The metabolic strategy of phosphorus-accumulating organisms in response to low temperature in micro pressure swirl reactor 微压漩涡反应器中聚磷生物应对低温的代谢策略

IF 7.4 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering

Pub Date : 2025-02-01 DOI: 10.1016/j.jece.2024.115036

Xi Tian , Xue Yin , Xiaona Ji , Hongyan Li , Huanyun Duan , Kunyu Zhang , Dejun Bian

The impact of low temperature on the growth and metabolism of phosphorus-accumulating organisms (PAO) is crucial for maintaining the stability of organic removal efficiency. To investigate how lowering the temperature affects PAO's metabolic strategy, a micro pressure swirl reactor (MPSR) was operated at temperatures of 15, 12, and 10℃. The interactions and metabolic pathways of the microbial community in the system were examined. The results showed total phosphorus (TP) removal rate efficiencies were 97.0 %, 94.0 %, and 94.8 % in 15, 12 and 10℃, respectively. As the temperature decreased, glycogen consumption decreased by 27.44 mg/gMLSS, while poly-β-hydroxybutyrate (PHB) accumulation and consumption increased by 33.80 and 37.88 mg/gMLSS, respectively. Two essential genera of PAO, Rhodocyclus, and Dechloromonas increased from 0.70 % and 0.31–3.04 % and 2.79 % respectively. The metabolism of PAO changed as the temperature decreased. Glycolysis was inhibited at temperatures 12 and 10℃, and PAO applied an increase in phosphorus metabolism to meet the energy requirements for growth metabolism. This conversion in metabolic strategy helped PAO gain a competitive advantage and ensured that MPSR maintained good phosphorus organic matter removal at low temperatures.

低温对磷积累生物（PAO）生长和新陈代谢的影响对于保持有机物去除效率的稳定性至关重要。为了研究降低温度如何影响 PAO 的代谢策略，在 15、12 和 10℃的温度下运行了微压漩涡反应器（MPSR）。对系统中微生物群落的相互作用和代谢途径进行了研究。结果表明，总磷（TP）去除率在 15、12 和 10℃时分别为 97.0%、94.0% 和 94.8%。随着温度的降低，糖原消耗量减少了 27.44 mg/gMLSS，而聚-β-羟基丁酸（PHB）的积累量和消耗量则分别增加了 33.80 和 37.88 mg/gMLSS。PAO 的两个重要属 Rhodocyclus 和 Dechloromonas 分别从 0.70 % 和 0.31 % 增加到 3.04 % 和 2.79 %。PAO 的新陈代谢随着温度的降低而变化。在温度为 12 和 10℃时，糖酵解受到抑制，PAO 增加了磷代谢，以满足生长代谢对能量的需求。这种代谢策略的转变有助于 PAO 获得竞争优势，并确保 MPSR 在低温条件下保持良好的磷有机物去除率。

{"title":"The metabolic strategy of phosphorus-accumulating organisms in response to low temperature in micro pressure swirl reactor","authors":"Xi Tian , Xue Yin , Xiaona Ji , Hongyan Li , Huanyun Duan , Kunyu Zhang , Dejun Bian","doi":"10.1016/j.jece.2024.115036","DOIUrl":"10.1016/j.jece.2024.115036","url":null,"abstract":"<div><div>The impact of low temperature on the growth and metabolism of phosphorus-accumulating organisms (PAO) is crucial for maintaining the stability of organic removal efficiency. To investigate how lowering the temperature affects PAO's metabolic strategy, a micro pressure swirl reactor (MPSR) was operated at temperatures of 15, 12, and 10℃. The interactions and metabolic pathways of the microbial community in the system were examined. The results showed total phosphorus (TP) removal rate efficiencies were 97.0 %, 94.0 %, and 94.8 % in 15, 12 and 10℃, respectively. As the temperature decreased, glycogen consumption decreased by 27.44 mg/gMLSS, while poly-β-hydroxybutyrate (PHB) accumulation and consumption increased by 33.80 and 37.88 mg/gMLSS, respectively. Two essential genera of PAO, <em>Rhodocyclus</em>, and <em>Dechloromonas</em> increased from 0.70 % and 0.31–3.04 % and 2.79 % respectively. The metabolism of PAO changed as the temperature decreased. Glycolysis was inhibited at temperatures 12 and 10℃, and PAO applied an increase in phosphorus metabolism to meet the energy requirements for growth metabolism. This conversion in metabolic strategy helped PAO gain a competitive advantage and ensured that MPSR maintained good phosphorus organic matter removal at low temperatures.</div></div>","PeriodicalId":15759,"journal":{"name":"Journal of Environmental Chemical Engineering","volume":"13 1","pages":"Article 115036"},"PeriodicalIF":7.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143182635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0