Environmental Technology最新文献

Anodic oxidation by electrical power pulses for alachlor degradation. 利用电力脉冲阳极氧化法降解甲草胺。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-04-01 Epub Date: 2024-08-16 DOI: 10.1080/09593330.2024.2389323

Fares Zouaoui, Didier Floner, Florence Fourcade

{"title":"Anodic oxidation by electrical power pulses for alachlor degradation.","authors":"Fares Zouaoui, Didier Floner, Florence Fourcade","doi":"10.1080/09593330.2024.2389323","DOIUrl":"10.1080/09593330.2024.2389323","url":null,"abstract":"This article explores the benefits of electrochemical oxidation in pulsed mode, using potential, current, and power pulses. While potential and current pulse electrochemical technology has been previously studied for wastewater treatment, no study has included power pulses until now. The objective of this work is to highlight the advantages of power pulses by applying this pulse type to the electrochemical oxidation of a probe molecule, alachlor. For this aim, the influence of operating parameters and the comparison of the different pulse modes were investigated and compared to the results obtained with the electrochemical oxidation of alachlor in continuous mode. The study shows that the best results were obtained with the power pulse electrochemical oxidation with 100% alachlor degradation after 180 min and a mineralisation yield of 38.3% after 240 min. These results were better than those reported in the literature for treatments with continuous current input using platinum electrodes. This new technique could be an effective and efficient way to treat contaminated water and reduce the pressure on freshwater reserves.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1402-1411"},"PeriodicalIF":2.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141992263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

The effects of various degrees of meteorological drought on forest vegetation in ecologically Fragile Karst Areas of Guangxi, China. 不同程度的气象干旱对中国广西生态脆弱喀斯特地区森林植被的影响。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-04-01 Epub Date: 2024-08-11 DOI: 10.1080/09593330.2024.2386864

Yanli Chen, Ying Xie, Mingzhi Li, Min Xie, Weihua Mo

{"title":"The effects of various degrees of meteorological drought on forest vegetation in ecologically Fragile Karst Areas of Guangxi, China.","authors":"Yanli Chen, Ying Xie, Mingzhi Li, Min Xie, Weihua Mo","doi":"10.1080/09593330.2024.2386864","DOIUrl":"10.1080/09593330.2024.2386864","url":null,"abstract":"ABSTRACTDrought presents a major challenge to the management of rocky desertification and ecological restoration in the delicate karst ecosystems of Guangxi. In this study, the normalized difference vegetation index (NDVI), fractional vegetation cover (FVC) and net primary productivity (NPP) were selected as vegetation remote sensing parameters, and the spatial response characteristics of different types of vegetation in karst areas of Guangxi Province to light, moderate, severe and extreme drought were analyzed to provide scientific basis for the evaluation of the impact of drought on vegetation in karst areas. The results are as follows: (1) NDVI, FVC and NPP showed a fluctuating increasing trend from 2000 to 2022, and the increasing rates were 0.058, 6.90%, and 43.3gC.m-2 per decade respectively. During this period, the number of light, moderate and severe drought days showed a decreasing trend, but the number of extreme drought days tended to increase. (2) The negative correlation of NDVI, FVC and NPP and drought increased from moderate to extreme drought, and from light to extreme drought, the negative correlation between NDVI and FVC and drought decreased, while that of NPP increased. (3) Light and moderate droughts had obvious negative impact on Chinese fir and broad-leaved forest, whereas severe and extreme droughts had obvious negative effect on eucalyptus and bamboo forest.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1333-1347"},"PeriodicalIF":2.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141916479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

Microcystins are present in water treatment plant residuals and are impacted by extraction and quantification methodology. 微囊藻毒素存在于水处理厂残留物中，并受到提取和定量方法的影响。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-04-01 Epub Date: 2024-09-26 DOI: 10.1080/09593330.2024.2402098

Emma van Dommelen, Lillian Des Rosiers, Elizabeth Crafton, Natalie M Hull

{"title":"Microcystins are present in water treatment plant residuals and are impacted by extraction and quantification methodology.","authors":"Emma van Dommelen, Lillian Des Rosiers, Elizabeth Crafton, Natalie M Hull","doi":"10.1080/09593330.2024.2402098","DOIUrl":"10.1080/09593330.2024.2402098","url":null,"abstract":"Microcystins (MCs), a toxin produced by some species of the photosynthetic autotrophic cyanobacteria, are the most studied and monitored cyanotoxin in water. Water treatment plant (WTP) residuals are the byproduct of water treatment consisting of solids removed from WTP processes and have been shown to contain cyanobacterial cells. However, the presence of MCs in WTP residuals has not been systematically demonstrated. Samples from four different WTPs across the United States were used to quantify MCs in residuals while assessing extraction and quantification methods adapted from water samples for solid matrices. MCs were present in 100% of samples. MC-LA was the most prevalent variant in these samples (70.05% of MCs quantified by UPLC-PDA). Natural degradation observed in a WTP storage lagoon was also investigated to determine the impact of physical, chemical, and biological processes on MC concentrations in high-biomass residuals. This study demonstrates that residuals of various characteristics across the United States contain MCs, and no one method was found to maximize results consistently across all samples. Cyanotoxins accumulating in WTP residuals are a growing concern. Implications of this work can help regulations and future studies of potential reuse applications and understanding of potential ecological significance of MCs accumulating in WTP residuals.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1704-1717"},"PeriodicalIF":2.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142344174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

Internal cycling of Fe³⁺/Fe²⁺ within Fe₃O₄ on cathode promotes green degradation of reactive brilliant red X-3B on anode. 阴极上 Fe3O4 中的 Fe3+/Fe2+ 内循环促进了阳极上活性艳红 X-3B 的绿色降解。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-04-01 Epub Date: 2024-08-19 DOI: 10.1080/09593330.2024.2390152

Zhanping Cao, Ye Meng, Sihan Shang, Yuxin Liu

{"title":"Internal cycling of Fe3+/Fe2+ within Fe3O4 on cathode promotes green degradation of reactive brilliant red X-3B on anode.","authors":"Zhanping Cao, Ye Meng, Sihan Shang, Yuxin Liu","doi":"10.1080/09593330.2024.2390152","DOIUrl":"10.1080/09593330.2024.2390152","url":null,"abstract":"Reactive brilliant red X-3B (RBRX-3B) wastewater is difficult to decolourise, not readily biodegradable, and large in quantity. Therefore, the efficient removal of RBRX-3B is crucial. In this paper, a green and efficient electrochemical-electro-Fenton system with Fe3O4-modified carbon felt bag cathode (ECEF-Fe3O4) was set up to degrade RBRX-3B wastewater. Experiments confirmed that the removal of RBRX-3B by ·OH or H2O2 is quite low, and RBRX-3B can be completely oxidised and degraded directly on the anode. Long-cycle experimental data further shows that the degradation efficiency of RBRX-3B on the anode is 100% at 70 min at the reaction rate constants (k) of 0.071 min-1 in ECEF-Fe3O4 while that of RBRX-3B on the cathode is only 16.8 ± 0.9%. The generation of ·OH is mainly catalysed through the internal cycling of Fe3+/Fe2+ within Fe3O4 on the cathode, and the generation and annihilation of ·OH on the cathode enhance the oxidation efficiency of the anode, achieving the green and effective removal of RBRX-3B by the anode in ECEF-Fe3O4.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1423-1431"},"PeriodicalIF":2.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141999701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

Impact of the hydrated functional zone on the adsorption of ciprofloxacin to microplastics under the influence of UV aging. 紫外线老化作用下水合功能区对环丙沙星在微塑料上吸附的影响。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-04-01 Epub Date: 2024-09-05 DOI: 10.1080/09593330.2024.2398812

Lin Wang, Yang He, Yanhong Zhu, Jianqiang Zhang, Shijie Zheng, Wen Huang

{"title":"Impact of the hydrated functional zone on the adsorption of ciprofloxacin to microplastics under the influence of UV aging.","authors":"Lin Wang, Yang He, Yanhong Zhu, Jianqiang Zhang, Shijie Zheng, Wen Huang","doi":"10.1080/09593330.2024.2398812","DOIUrl":"10.1080/09593330.2024.2398812","url":null,"abstract":"The inevitable UV aging of microplastics (MPs) is one of the key factors affecting their interaction with antibiotics. In this study, polyethylene (PE) and polystyrene (PS) MPs were aged with UV irradiation. The adsorption isotherms and kinetics of ciprofloxacin (CIP) to virgin and aged MPs were investigated through various models, and the effects of pH on the adsorption amount were explored. Characterization revealed that the surfaces of aged MPs became rougher, and the hydrophilicity increased. These aged MPs were still in the early stage of aging on the basis of their carbonyl index (CI) (<0.2) and O/C (<0.04) values. The adsorption isotherms indicated that the adsorption mechanism of aged PE was different from that of virgin PE. Compared with virgin PE, the adsorption amount of aged PE increased by 87.80-95.45%, and the adsorption rate decreased by 65.52-80.74%. However, aging did not significantly affect the equilibrium adsorption amount or adsorption rate of aged PS. The external diffusion rate (Kext) (about 2.29-0.36 h-1) was almost 30 times greater than the internal diffusion rate (Kint) in the film-pore mass transfer (FPMT) model, indicating that CIP adsorption rate was dominated by external diffusion. A hydrated functional zone is thought to form around aged MPs, thus changing the adsorption mechanism and adsorption amount of aged PE. Therefore, more attention should be given to alterations in the hydrated functional zone in the early stage of MPs aging.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1468-1480"},"PeriodicalIF":2.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142132212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

Spatial confined synthesis of submicron Fe-MoS₂ with abundant surface cationic groups and sulfur vacancies for enhanced peroxymonosulfate activation. 空间限制合成具有丰富表面阳离子基团和硫空位的亚微米级 Fe-MoS2，以增强过一硫酸盐活化。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-04-01 Epub Date: 2024-08-21 DOI: 10.1080/09593330.2024.2391076

Shikun Liang, Yunzhan Ying, Xiangwei Xu, Chengbo Qian, Long Jiang, Jing Zhou, Yulong Wan, Lie Wang, Yuyuan Yao

{"title":"Spatial confined synthesis of submicron Fe-MoS2 with abundant surface cationic groups and sulfur vacancies for enhanced peroxymonosulfate activation.","authors":"Shikun Liang, Yunzhan Ying, Xiangwei Xu, Chengbo Qian, Long Jiang, Jing Zhou, Yulong Wan, Lie Wang, Yuyuan Yao","doi":"10.1080/09593330.2024.2391076","DOIUrl":"10.1080/09593330.2024.2391076","url":null,"abstract":"The widespread use of emerging refractory organic contaminants poses a significant threat to human health, prompting the need for a cost-effective and efficient removal strategy. While the iron ions/PMS system effectively removes organic pollutants, slow Fe3+ to Fe2+ transformation hampers its efficiency, and the homogeneous distribution of iron ions complicates separation, resulting in secondary sludge pollution. Herein, we developed a novel submicron Fe-MoS2 (S-Fe-MoS2) catalyst with abundant surface cationic groups and sulfur vacancy through a cationic polyacrylamide aerogels (CPAMA) confined hydrothermal synthesis strategy. These features promote active site exposure, enhance reactant adsorption, and accelerate electron transfer between Mo and Fe sites, improving catalytic kinetics and promoting Fe3+/Fe2+ cycle for PMS activation. As a result, the S-Fe-MoS2/PMS system exhibited a high catalytic rate constant (kobs) of 0.32 min-1, in the degradation of 4-chlorophenol (4-CP), 1.5 times higher than that of the conventional Fe-MoS2/PMS system. It also achieved 82.9% total organic carbon (TOC) degradation within 60 min. Additionally, it possessed similar degradation performance for various organic pollutants, along with remarkable reusability (four cycles) and broad pH adaptability (2-8), indicating significant potential for widespread application. This study provided a new way for developing advanced heterogeneous catalysts with high efficiency for water treatment.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1561-1572"},"PeriodicalIF":2.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142008527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

Effects of pH on coprecipitation of As(III) with biogenic synthesized schwertmannite and jarosite. pH 值对砷(III)与生物合成的石英砂和绿泥石共沉淀的影响

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-04-01 Epub Date: 2024-09-02 DOI: 10.1080/09593330.2024.2391581

Yongwei Song, Haowei Luo, Jun Yang, Honghu Li, Zehao Guo, Heru Wang, Zuwu Shen

{"title":"Effects of pH on coprecipitation of As(III) with biogenic synthesized schwertmannite and jarosite.","authors":"Yongwei Song, Haowei Luo, Jun Yang, Honghu Li, Zehao Guo, Heru Wang, Zuwu Shen","doi":"10.1080/09593330.2024.2391581","DOIUrl":"10.1080/09593330.2024.2391581","url":null,"abstract":"Secondary iron minerals play significant roles in the immobilization of As under acidic conditions, such as acid mine drainage. However, previous research works have not clarified the effect of pH on As(III) removal through coprecipitation with secondary minerals. Therefore, in this study, we aimed to investigate the discrepancy in As(III) coprecipitation with biogenic synthesized schwertmannite (Sch) and jarosite (Jar) at different pH values. For this, concentrations of Fe2+, TFe, <math><mi>S</mi><msubsup><mi>O</mi><mn>4</mn><mrow><mn>2</mn><mo>-</mo></mrow></msubsup></math>, and As(III) in shake flasks were monitored during an overall incubation period of 83 h at initial pH of 1.5, 2.0, and 2.5. In addition, the physicochemical properties of collected minerals after incubation were identified using scanning electron microscopy, X-ray diffraction, pore size distribution, and Brunauer - Emmett - Teller surface area analyses. Our results showed that almost no mineral synthesis and no As(III) removal were detected in coprecipitated schwertmannite (Co-Sch) system and coprecipitated jarosite (Co-Jar) system at an initial pH of 1.5. The TFe precipitation efficiencies and As(III) removal efficiencies increased considerably and morphologies of Co-Sch and Co-Jar improved significantly when the initial pH value increased from 2.0-2.5. The maximum TFe precipitation efficiency and As(III) removal efficiency reached 30.8% and 89.6%, respectively, for the Co-Sch system, and were 47.5% and 37.4%, respectively, for the Co-Jar system. The overall results show that pH significantly affects the formation of Co-Sch and Co-Jar and the behaviour of As(III) coprecipitation.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1600-1611"},"PeriodicalIF":2.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142105806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

Theoretical and experimental studies of cephalexin adsorption on aluminium as a new alternative of removal from wastewater. 将头孢氨苄吸附在铝上作为去除废水的一种新选择的理论和实验研究。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-04-01 Epub Date: 2024-08-19 DOI: 10.1080/09593330.2024.2390150

María Yesenia Díaz-Cárdenas, Victoria Bustos-Terrones, Samantha Giselle López-Aguilar, Angélica Sánchez-Ponce, Jorge Uruchurtu-Chavarín, Gabriela Eleonora Moeller-Chávez

{"title":"Theoretical and experimental studies of cephalexin adsorption on aluminium as a new alternative of removal from wastewater.","authors":"María Yesenia Díaz-Cárdenas, Victoria Bustos-Terrones, Samantha Giselle López-Aguilar, Angélica Sánchez-Ponce, Jorge Uruchurtu-Chavarín, Gabriela Eleonora Moeller-Chávez","doi":"10.1080/09593330.2024.2390150","DOIUrl":"10.1080/09593330.2024.2390150","url":null,"abstract":"Cephalexin (CPX) is an antibiotic widely used to treat many infections. CPX has become an emerging pollutant present in wastewater. On the other hand, it is well known that organic compounds can be adsorbed over metal surfaces when the metal is in active state such as when it is rusting. This work proposes an alternative for the elimination of CPX from wastewater, applying electrochemical principles using a conventional and cheap substrate, aluminium. The first part consisted of obtaining the active states of aluminium electrodes carrying out voltametric curves at different pH (4, 7 and 9) to find the particular condition of interaction between CPX and metal surface. The potential was used in the potentiostatic tests to set the activation potential of metal at different times. After the treatment, electrolyte solutions were analysed using UV-vis spectra, and the aluminium surfaces were studied by optical micrographs and X-ray diffraction. In addition, aluminium-CPX interactions were corroborated by quantum-chemical calculations and adsorption isotherms. All results indicate that it was possible for the CPX removal at basic pH conditions, where the molecule adsorption on the aluminium substrate occurs due to a strong electrostatic interaction.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1412-1422"},"PeriodicalIF":2.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141999703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

Iron capture mechanism for harmless recovering platinum group metals from spent automobile catalyst. 从废汽车催化剂中无害回收铂族金属的铁捕获机制。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-04-01 Epub Date: 2024-09-27 DOI: 10.1080/09593330.2024.2398809

Shubo A, Shuchen Sun, Ganfeng Tu, Ronghui Liu, Faxin Xiao, Ruifeng Shi, Chengfu Sui, Kuopei Yu

{"title":"Iron capture mechanism for harmless recovering platinum group metals from spent automobile catalyst.","authors":"Shubo A, Shuchen Sun, Ganfeng Tu, Ronghui Liu, Faxin Xiao, Ruifeng Shi, Chengfu Sui, Kuopei Yu","doi":"10.1080/09593330.2024.2398809","DOIUrl":"10.1080/09593330.2024.2398809","url":null,"abstract":"Automotive catalysts are the largest consumption source of platinum group metals (PGMs). When it exceeds its useful life, spent automotive catalysts (SACs) are the most important secondary PGMs resource and are classified as hazardous solid waste. Recycling SAC is a promising solution to alleviate the shortage of PGMs resources for projects and reduce environmental pollution. The technology for recovering PGMs by iron-melting collection can obtain Fe-PGMs alloy and harmless glass slag. In this paper, the spontaneous aggregation and growth behaviour of Fe and PGMs in slag at melting temperature were studied, and the settling velocity of Fe-PGMs particles in the slag was calculated to be 6.68 × 10-3 m/s. The effects of melting time, melting temperature and Fe dosage on PGMs recovery were determined, and the optimal conditions were 10 wt% Fe, 1500°C and 40 min. The toxicity test verifies that the slag obtained is a clean slag harmless to the environment. This work explains the mechanism of Fe collection of PGMs and provides a pathway for efficient and harmless recovery of PGMs from SAC.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1666-1678"},"PeriodicalIF":2.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142344173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

Effect of subinhibitory concentrations on the spreading of the ampicillin resistance gene bla_CMY-2 in an activated sludge microcosm. 亚抑制浓度对活性污泥微生态系统中氨苄西林抗性基因 blaCMY-2 扩散的影响。

IF 2.2 4区环境科学与生态学

Environmental Technology Pub Date : 2025-04-01 Epub Date: 2024-08-30 DOI: 10.1080/09593330.2024.2394719

Daniel Basiry, Roald Kommedal, Krista Michelle Kaster

{"title":"Effect of subinhibitory concentrations on the spreading of the ampicillin resistance gene blaCMY-2 in an activated sludge microcosm.","authors":"Daniel Basiry, Roald Kommedal, Krista Michelle Kaster","doi":"10.1080/09593330.2024.2394719","DOIUrl":"10.1080/09593330.2024.2394719","url":null,"abstract":"As the problem of multi-resistant bacteria grows a better understanding of the spread of antibiotic resistance genes is of utmost importance for society. Wastewater treatment plants contain subinhibitory concentrations of antibiotics and are thought to be hotspots for antibiotic resistance gene propagation. Here we evaluate the influence of sub-minimum inhibitory concentrations of antibiotics on the spread of resistance genes within the bacterial community in activated sludge laboratory-scale sequencing batch reactors. The mixed communities were fed two different ampicillin concentrations (500 and 5000 µg/L) and the reactors were run and monitored for 30 days. During the experiment the β-lactamase resistance gene blaCMY-2 was monitored via qPCR and DNA samples were taken to monitor the effect of ampicillin on the microbial community. The relative copy number of blaCMY-2 in the reactor fed with the sub-minimum inhibitory concentration of 500 µg/L ampicillin was spread out over a wider range of values than the control and 5000 µg/L ampicillin reactors indicating more variability of gene number in the 500 µg/L reactor. This result emphasises the problem of sub-minimum inhibitory concentrations of antibiotics in wastewater. High-throughput sequencing showed that continuous exposure to ampicillin caused a shift from a Bacteroidetes to Proteobacteria in the bacterial community. The combined use of qPCR and high-throughput sequencing showed that ampicillin stimulates the spread of resistance genes and leads to the propagation of microbial populations which are resistant to it.","PeriodicalId":12009,"journal":{"name":"Environmental Technology","volume":" ","pages":"1612-1624"},"PeriodicalIF":2.2,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142105805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0