Water Cycle最新文献_第2页

Evaluation methods for bacterial inactivation and impairment by nanowire-assisted electroporation 纳米线辅助电穿孔法对细菌失活和损伤的评价方法

IF 8.7

Water Cycle Pub Date : 2025-06-09 DOI: 10.1016/j.watcyc.2025.06.004

Zi-Rong Chen, Hai Liu

{"title":"Evaluation methods for bacterial inactivation and impairment by nanowire-assisted electroporation","authors":"Zi-Rong Chen, Hai Liu","doi":"10.1016/j.watcyc.2025.06.004","DOIUrl":"10.1016/j.watcyc.2025.06.004","url":null,"abstract":"<div><div>As compared with the conventional electroporation by using plate electrodes with voltages of thousands of volts, nanowire-assisted electroporation (NW-EP) under low-voltage supply has been well demonstrated to be a green and efficient disinfection method via the formation of locally enhanced electric field near nanowire tips. These finite strong electric fields inactivated bacterial cells by inducing unrecoverable damages on rigid cell wall, and creating reversible and irreversible pores on flexible membrane. However, due to their random exposure by nonuniform and nanosized strong electric field over nanowire tips, both reversible and irreversible membrane pores on bacterial cells were formed during NW-EP disinfection. Herein, we employed a membrane-impermeable propidium iodide (PI) dye to stain NW-EP influent and effluent for distinguishing cell damages with PI-detectable reversible and irreversible membrane pores. Meanwhile, considering the inaccessible reversible membrane pores with sizes smaller than PI molecules, selective plates with NaCl addition were prepared to induce high osmotic pressure for inhibiting the growth and reproduction of bacterial cells with damaged cell wall and intact cell membrane, namely reversible membrane damages. These methods well revealed the mechanisms of cell inactivation and impairment by NW-EP. It can provide fundamental information for designing synergistic strategy of NW-EP with other oxidizing disinfectants, which potentially enhance disinfection performance via promoting the oxidant diffusion into cells for inactivation of bacterial cells and elimination of intracellular hazardous substrates.</div></div>","PeriodicalId":34143,"journal":{"name":"Water Cycle","volume":"7 ","pages":"Pages 1-6"},"PeriodicalIF":8.7,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144749704","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

“A multi-method approach to groundwater potential assessment: Integrating remote sensing, GIS, and AHP in North Shoa zone, Ethiopia” 地下水潜力评估的多方法方法：整合遥感、GIS和AHP在北Shoa地区，埃塞俄比亚

IF 8.7

Water Cycle Pub Date : 2025-06-04 DOI: 10.1016/j.watcyc.2025.06.002

Eyosias Birhanu Alemu, Abebaw Belayneh Zelalem

{"title":"“A multi-method approach to groundwater potential assessment: Integrating remote sensing, GIS, and AHP in North Shoa zone, Ethiopia”","authors":"Eyosias Birhanu Alemu, Abebaw Belayneh Zelalem","doi":"10.1016/j.watcyc.2025.06.002","DOIUrl":"10.1016/j.watcyc.2025.06.002","url":null,"abstract":"<div><div>Groundwater is essential for human health, economic development, and ecosystem sustainability, particularly in water-scarce regions. In Ethiopia, it supplies over 70% of the national water demand, yet localized assessments remain limited. This study addresses this gap for the North Shewa Zone, where water scarcity is exacerbated by low rainfall, reliance on rain-fed agriculture, and rapid population growth. By integrating Geographic Information Systems (GIS), Remote Sensing (RS), and the Analytical Hierarchy Process (AHP), we developed a groundwater potential map using thematic layers such as geology, lineament density, land use/land cover, slope, rainfall, drainage density, and soil type. For validation, well location data were obtained from the Ministry of Water and Energy, and a three-month field survey (15 February – 15 May 2022)was conducted to verify well locations and directly measure water yields from 31 boreholes (1). Despite challenges such as incomplete historical water yield records and non-functional water meters, the results indicate that 0.5% (80.8 km<sup>2</sup>) of the study area has Very High groundwater potential, 24.7% (3994.5km<sup>2</sup>) High, 58.8% (9505.56 km<sup>2</sup>) Moderate, and 15.9% (2505.16 km<sup>2</sup>) Very Low (2). Validation through Receiver Operating Characteristic (ROC) curve and Area Under the Curve (AUC) analysis yielded an AUC of 0.89, demonstrating strong agreement with borehole yield data (3). This confirms that integrating Remote Sensing and GIS is highly effective for delineating groundwater potential zones. This study provides a cost-effective, scalable, and reliable method for groundwater assessment, offering actionable insights to improve irrigation and potable water supply in North Shewa Zone.</div></div>","PeriodicalId":34143,"journal":{"name":"Water Cycle","volume":"7 ","pages":"Pages 31-47"},"PeriodicalIF":8.7,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144756820","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

A multi-criteria approach to fluvial flood vulnerability assessment: A case study of lower Manya Krobo municipality 河流洪水易损性评价的多标准方法：以马尼亚克罗博市为例

IF 8.7

Water Cycle Pub Date : 2025-06-04 DOI: 10.1016/j.watcyc.2025.06.001

Aaron Tettey Tetteh , Serah Kahuri , Lily Lisa Yevugah , Abdul-Wadood Moomen , Paul Adjei Kwakwa , Issaka Yakubu

{"title":"A multi-criteria approach to fluvial flood vulnerability assessment: A case study of lower Manya Krobo municipality","authors":"Aaron Tettey Tetteh , Serah Kahuri , Lily Lisa Yevugah , Abdul-Wadood Moomen , Paul Adjei Kwakwa , Issaka Yakubu","doi":"10.1016/j.watcyc.2025.06.001","DOIUrl":"10.1016/j.watcyc.2025.06.001","url":null,"abstract":"<div><div>Fluvial flooding predominantly occurs in areas near large water bodies. This study utilized an integrated approach combining Geographic Information System (GIS), Remote Sensing and the Analytic Hierarchy Process (AHP) to assess fluvial flood vulnerability in the Lower Manya Krobo Municipality, Ghana. Ten causative factors of flooding were derived from remotely sensed data and weighted using AHP. The model revealed that 9.19% of the municipality is in a very high-risk zone, and 26.76% is in a high-risk zone, with slope and elevation identified as the primary contributors to flooding. Notable towns and landmarks within the very high- and high-risk zones include parts of Kpong and Akuse, along with Obele M.A. Primary School, Modern Senior High School, and Presby and New Covenant Apostolic Churches. These findings highlight vulnerable areas and provide valuable data for disaster management agencies, such as the National Disaster Management Organization and the Volta River Authority, to enhance flood preparedness and mitigation efforts in the region.</div></div>","PeriodicalId":34143,"journal":{"name":"Water Cycle","volume":"7 ","pages":"Pages 68-82"},"PeriodicalIF":8.7,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144756830","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

Identifying aquifer recharge areas based on secondary information in the Chinchiná river basin and reviewing its current status 基于二次信息的钦钦河流域含水层补给区识别及现状回顾

IF 8.7

Water Cycle Pub Date : 2025-05-22 DOI: 10.1016/j.watcyc.2025.05.006

Diego A. Martínez Carrillo , Gloria Y. Flórez Yepes , Jose M. Bermúdez Piedrahita , Angela M. Alzate Álvarez , Erika J. Aldana Arcila , Paola A. Vásquez Cardona

{"title":"Identifying aquifer recharge areas based on secondary information in the Chinchiná river basin and reviewing its current status","authors":"Diego A. Martínez Carrillo , Gloria Y. Flórez Yepes , Jose M. Bermúdez Piedrahita , Angela M. Alzate Álvarez , Erika J. Aldana Arcila , Paola A. Vásquez Cardona","doi":"10.1016/j.watcyc.2025.05.006","DOIUrl":"10.1016/j.watcyc.2025.05.006","url":null,"abstract":"<div><div>Identifying potential aquifer recharge zones is essential for sustainable groundwater management, particularly in regions affected by land-use changes and climate variability. This study aimed to map and assess aquifer recharge areas in the Chinchiná River Basin using secondary data and GIS-based spatial analysis based on the soil balance method proposed by Schosinsky. Key variables included monthly precipitation, vegetation cover, slope, soil texture, and evapotranspiration. Infiltration coefficients ranged from 0.06 in steep areas to 0.30 in flat zones. Three main recharge zones were identified: the southeastern Rioclaro River sub-basin (200–300 mm/year), the northeastern Guacaica River sub-basin (100–200 mm/year), and the flatlands near the Cauca River mouth (300–400 mm/year). Vegetation cover significantly influenced infiltration rates, with dense forest showing higher retention capacity than agricultural or urban areas. However, unprotected zones such as the Guacaica and Cauca rivers are under increasing threat from deforestation and unplanned urban expansion. These findings highlight the importance of integrating hydrogeological assessments into regional land-use planning and align with national policies such as Colombia's National Water Policy and the United Nations Sustainable Development Goal 6. The methodology provides a replicable framework for identifying recharge areas in similar tropical Andean basins where data availability is limited.</div></div>","PeriodicalId":34143,"journal":{"name":"Water Cycle","volume":"7 ","pages":"Pages 139-150"},"PeriodicalIF":8.7,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219619","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 spatial-temporal changes in water balance components under future climate change in the Gorganroud Watershed, Iran 未来气候变化下伊朗Gorganroud流域水平衡成分的时空变化

Water Cycle Pub Date : 2025-01-01 DOI: 10.1016/j.watcyc.2025.02.003

Ghorbani Hossein , Akbari Azirani Tayebeh , Entezari Alireza , Baaghideh Mohammad

{"title":"The spatial-temporal changes in water balance components under future climate change in the Gorganroud Watershed, Iran","authors":"Ghorbani Hossein , Akbari Azirani Tayebeh , Entezari Alireza , Baaghideh Mohammad","doi":"10.1016/j.watcyc.2025.02.003","DOIUrl":"10.1016/j.watcyc.2025.02.003","url":null,"abstract":"<div><div>The quantitative assessment of water balance components is crucial for sustainable management of watersheds. These components have been affected by climate change over the recent years across the world, specifically in semi-arid regions like Iran. This study aims to evaluate the effects of future climate change on the hydrological components in the Gorganroud watershed, northern Iran. In this regard, the Soil and Water Assessment Tool (SWAT) was calibrated and validated to simulate hydrological processes under future climate conditions. We also used the outputs from a Coupled Model Intercomparison Project Phase 9 (CMIP6) climate model to project future climate variables for 2025–2054 and 2071–2100 periods. The Quantile Mapping (QM) method was applied to remove the systematic biases in the simulated climate datasets. Our findings indicate that (1) minimum and maximum temperature will likely rise up to 3.3 °C and 4.3 °C, respectively, during 2071–2100 compared to the baseline of 1985–2014 under SSP585, (2) precipitation is predicted to increase up to 5.6% under SSP245, while it is expected to decrease up to 5% under the SSP585 in 2071-2100compared to the baseline, (3) in response to climate change, the study area will see a reduction in surface runoff, base flow, and lateral flow up to 7.7%, 13% and 10.2%, respectively, and an increase in evapotranspiration up to 11%) until the end of the century, (4) spatial analysis indicates that the eastern, southeastern, and northern regions of the watershed are projected to experience the most significant declines in hydrological components, with changes up to 50%. These results highlight could provide valuable information for decision and policy-makers to adaptively manage and plan strategies in the future for the Gorganroud watershed.</div></div>","PeriodicalId":34143,"journal":{"name":"Water Cycle","volume":"6 ","pages":"Pages 319-334"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143936063","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

Enhanced adsorption and photocatalytic degradation of organics using La-doped g-C3N4 with Ag NPs Ag纳米粒子增强la掺杂g-C3N4对有机物的吸附和光催化降解

Water Cycle Pub Date : 2025-01-01 DOI: 10.1016/j.watcyc.2025.01.002

Kingsley Igenepo John, Touma B. Issa, Goen Ho, Aleksandar N. Nikoloski, Dan Li

{"title":"Enhanced adsorption and photocatalytic degradation of organics using La-doped g-C3N4 with Ag NPs","authors":"Kingsley Igenepo John, Touma B. Issa, Goen Ho, Aleksandar N. Nikoloski, Dan Li","doi":"10.1016/j.watcyc.2025.01.002","DOIUrl":"10.1016/j.watcyc.2025.01.002","url":null,"abstract":"<div><div>In the present study, a series of La-doped g-C<sub>3</sub>N<sub>4</sub> with Ag nanoparticles (NPs) decoration was synthesized <em>via</em> one-pot thermal pyrolysis and wet impregnation. As compared with the bulk g-C<sub>3</sub>N<sub>4</sub> (BCN), La-modified g-C<sub>3</sub>N<sub>4</sub> or Ag-modified g-C<sub>3</sub>N<sub>4</sub>, the optimal La-doped g-C<sub>3</sub>N<sub>4</sub> with Ag NPs decoration (Ag-0.8/LaCN-1) showed improved methyl orange (MO) adsorptive capacity and higher photocatalytic activity, because of the synergistic effect of La doping and Ag NPs decoration. Adsorption kinetic and isotherm models were employed to study the adsorption mechanism. The best fit of the experimental data was obtained using the pseudo-second-order (PSO) kinetic model and the Redlich-Peterson isotherm model. It indicated that the MO adsorption using Ag-0.8/LaCN-1 was mainly governed by chemisorption; the process appeared to follow neither an ideal monolayer nor a multilayer but a hybrid mechanism. The MO adsorptive (30 min) removal and photocatalytic degradation (80 min) rate using Ag-0.8/LaCN-1 was seen at around 49.6 and 13.1 times that of BCN, respectively. At pH = 6, the good MO adsorption could be mainly the result of π – π interaction and complexation; whilst the good photocatalytic efficiency was ascribed to improved visible light absorption, charge carrier separation and transfer. Superoxide radicals and holes were proven as the main reactive species for the high MO photocatalytic degradation, by conducting the scavenger test and ESR analysis. The as-prepared Ag-0.8/LaCN-1 displayed good reusability with approximately a 3% loss in the total MO removal% after five consecutive runs of tests. Good stability was observed, recording only ca. 0.25% and 0.01% leaching of Ag and La dopants from Ag-0.8/LaCN-1, respectively, suggesting its robustness for practical use.</div></div>","PeriodicalId":34143,"journal":{"name":"Water Cycle","volume":"6 ","pages":"Pages 151-175"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143726095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced volatile fatty acids production from anaerobic fermentation of grease trap waste by Fenton pretreatment Fenton预处理强化隔油池废弃物厌氧发酵产挥发性脂肪酸

Water Cycle Pub Date : 2025-01-01 DOI: 10.1016/j.watcyc.2025.03.004

Rui Miao , Yongxia Liu , Minghui Zhang , Jialin Wan , Zhangwei He , Baoshan Xing , Danxi Huang , Lei Wang

{"title":"Enhanced volatile fatty acids production from anaerobic fermentation of grease trap waste by Fenton pretreatment","authors":"Rui Miao , Yongxia Liu , Minghui Zhang , Jialin Wan , Zhangwei He , Baoshan Xing , Danxi Huang , Lei Wang","doi":"10.1016/j.watcyc.2025.03.004","DOIUrl":"10.1016/j.watcyc.2025.03.004","url":null,"abstract":"<div><div>To achieve the efficient reclamation of organic resources in grease trap waste (GTW), a Fenton pretreatment for GTW was proposed in this work to convert the organic resources in GTW to soluble chemical oxygen demand (SCOD), followed by SCOD was then degraded into volatile fatty acids (VFAs) via anaerobic fermentation. The effects of the reaction conditions, H<sub>2</sub>O<sub>2</sub> and Fe<sup>2+</sup> dosages during Fenton pretreatment on the properties of GTW were investigated, and the yield and composition of VFAs were evaluated. The results showed that the grease and organic matter in GTW were mostly present as oil droplets and solid particles; thus, the system needed to be stirred vigorously after adding H<sub>2</sub>O<sub>2</sub> to ensure full contact of H<sub>2</sub>O<sub>2</sub> with the grease and organic molecules. Then, Fe<sup>2+</sup> was added to initiate the Fenton reaction to change the properties of GTW. When the dosages of H<sub>2</sub>O<sub>2</sub> and Fe<sup>2+</sup> were 2% and 300 mg/L, respectively, the SCOD of GTW after Fenton pretreatment increased by 256%, the viscosity decreased by 99%, and the oil content decreased from 37% to 3%. These results indicated that Fenton pretreatment provided better organic matter and mass transfer conditions for anaerobic fermentation. The VFAs yield in the stable operation stage reached 19,059–21,999 mg/L.</div></div>","PeriodicalId":34143,"journal":{"name":"Water Cycle","volume":"6 ","pages":"Pages 278-284"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143863745","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

Examining green and chemical methods for zero-valent iron nanoparticle synthesis in heavy metal adsorption 重金属吸附合成零价铁纳米颗粒的绿色化学方法研究

Water Cycle Pub Date : 2025-01-01 DOI: 10.1016/j.watcyc.2025.05.003

Juan Ferro-Falla , Lewis S. Rowles , Farith Diaz Arriaga , Jaime Plazas-Tuttle

{"title":"Examining green and chemical methods for zero-valent iron nanoparticle synthesis in heavy metal adsorption","authors":"Juan Ferro-Falla , Lewis S. Rowles , Farith Diaz Arriaga , Jaime Plazas-Tuttle","doi":"10.1016/j.watcyc.2025.05.003","DOIUrl":"10.1016/j.watcyc.2025.05.003","url":null,"abstract":"<div><div>The increasing concern over heavy metal contamination in water has necessitated the development of sustainable and efficient treatment methods. This study compares two synthesis approaches for zero-valent iron nanoparticles (nZVI) for cadmium, chromium, and arsenic removal: chemical reduction using sodium borohydride and green synthesis utilizing cocoa husk extracts combined with hydrothermal carbonization (HTC). Chemically synthesized nZVI exhibited high initial removal efficiencies (>98%), though desorption effects occurred over time due to particle aging. In contrast, green-synthesized nZVI, stabilized by a carbon matrix, maintained consistent removal efficiencies above 98% for 120 h under acidic conditions, showcasing superior stability and reactivity. Characterization through SEM, EDS, and XRD confirmed the dual mechanisms of metal removal: reduction and adsorption facilitated by the Fe(0) core and oxide layers. While experimental conditions were optimized for each synthesis method, the findings highlight the promise of green-synthesized nZVI as a sustainable alternative for heavy metal remediation. Future studies should explore adsorption isotherms and long-term applications to further validate the scalability and efficacy of these materials.</div></div>","PeriodicalId":34143,"journal":{"name":"Water Cycle","volume":"6 ","pages":"Pages 473-484"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144312863","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

Integrated analysis of using high-value microalgae for tetracycline treatment with biomass utilization: Responses, removal pathway, physiological and metabolomic characterization 生物质利用高价值微藻处理四环素的综合分析：反应、去除途径、生理和代谢组学表征

Water Cycle Pub Date : 2025-01-01 DOI: 10.1016/j.watcyc.2025.05.001

Yaqian Yuan , Zeyuan Wang , Ganlin Hu , Yu Hong

{"title":"Integrated analysis of using high-value microalgae for tetracycline treatment with biomass utilization: Responses, removal pathway, physiological and metabolomic characterization","authors":"Yaqian Yuan , Zeyuan Wang , Ganlin Hu , Yu Hong","doi":"10.1016/j.watcyc.2025.05.001","DOIUrl":"10.1016/j.watcyc.2025.05.001","url":null,"abstract":"<div><div>Antibiotic-contaminated wastewater poses serious threats to the ecological environment. While using microalgae for antibiotic removal has been extensively studied, this study provides a comprehensive and integrated analysis of the physiological and metabolic response mechanisms of <em>Chlorella</em> sp. HL to tetracycline (TC). The results showed that <em>Chlorella</em> sp. HL exhibited strong TC resistance and high removal efficiencies (98.63–99.95%). Low TC concentrations (<10 mg/L) promoted microalgal growth, while higher concentrations (>20 mg/L) inhibited its growth. Pigment contents (chlorophyll <em>a</em>, chlorophyll <em>b</em>, and carotenoids) generally increased under the stimulation of TC, except for carotenoids at 1 mg/L TC. The photosynthetic activity of <em>Chlorella</em> sp. HL was significantly affected, and it was reduced at higher concentrations of TC. Antioxidant enzyme activities and malondialdehyde (MDA) content increased with TC concentration, indicating TC could cause oxidative stress. In addition, TC altered the high-value substance contents of <em>Chlorella</em> sp. HL, with protein and lipid contents initially declining but subsequently increasing, while polysaccharide content gradually rose. Metabolomic analysis indicated that <em>Chlorella</em> sp. HL responded to TC stress by regulating carbohydrate metabolism and other pathways. This study provides an integrated analysis of the physiological, biochemical, and metabolomic responses of microalgae to TC. This comprehensive analysis provides new insights into how microalgae adapt to and mitigate TC stress, and especially revealing its metabolic response mechanism to TC. In addition, the potential for utilizing microalgal biomass for high-value products production when removing antibiotics has been investigated. This dual focus on bioremediation and resource production is a novel research direction.</div></div>","PeriodicalId":34143,"journal":{"name":"Water Cycle","volume":"6 ","pages":"Pages 440-448"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144312864","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 presence of ammonia causing breakpoint chlorination promoted the formation of trihaloacetaldehydes and trihalomethanes 氨的存在导致了断点氯化反应，促进了三卤乙醛和三卤甲烷的生成

Water Cycle Pub Date : 2025-01-01 DOI: 10.1016/j.watcyc.2024.12.002

Qiu-zhe Chen , Ya-qi Li , Jia-jia Jiao , Qi-jun Zhang , Huang Huang

{"title":"The presence of ammonia causing breakpoint chlorination promoted the formation of trihaloacetaldehydes and trihalomethanes","authors":"Qiu-zhe Chen , Ya-qi Li , Jia-jia Jiao , Qi-jun Zhang , Huang Huang","doi":"10.1016/j.watcyc.2024.12.002","DOIUrl":"10.1016/j.watcyc.2024.12.002","url":null,"abstract":"<div><div>The presence of ammonia can cause breakpoint chlorination when chlorination is applied for water disinfection. However, the formation of trihalomethanes (THMs) and trihaloacetaldehydes (THALs) which are typical disinfection byproducts during breakpoint chlorination is not fully understood. In this study, THMs and THALs formation during breakpoint chlorination was evaluated and compared with that during chlorination without ammonia. THMs formation was occasionally higher during breakpoint chlorination than during chlorination without ammonia for water containing natural organic matter (NOM), as breakpoint chlorination produced more THMs for amino acids but less THMs for phenols than chlorination without ammonia. However, breakpoint chlorination caused 16.2−40.2% higher THALs formation than chlorination without ammonia for NOM-containing samples and consistently higher THALs formation for model compounds. The roles of trichloramine (NCl<sub>3</sub>) and hydroxyl radical (•OH) formed from chlorine-ammonia breakpoint reactions in THMs and THALs formation during breakpoint chlorination were evaluated. Scavenging •OH by <em>tert</em>-butanol reduced THALs formation by 11.5–27.6%, which was higher than the reduction of THMs formation, indicating a more important role of •OH in transforming THALs precursors than THMs precursors. NOM and amino acids formed more THMs and THALs when reacting with NCl<sub>3</sub> than with free chlorine, indicating a promotional effect of NCl<sub>3</sub> on THMs and THALs formation during breakpoint chlorination. The formation of THMs and THALs during breakpoint chlorination at various conditions confirmed that the presence of ammonia causing breakpoint chlorination could increase the formation of THMs and THALs and particularly the brominated species. This research expands the understanding of disinfection byproducts formation during breakpoint chlorination.</div></div>","PeriodicalId":34143,"journal":{"name":"Water Cycle","volume":"6 ","pages":"Pages 118-125"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143697617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0