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Hydraulic performance of BlueLay –a potential sustainable drainage material for mitigating urban road runoff
Pub Date : 2025-02-17 DOI: 10.1016/j.clwat.2025.100071
Puneeta Sreenivas , Sarah Cotterill , Fiachra O’Loughlin
Increasing prevalence of impervious surfaces can lead to higher surface runoff and overwhelm conventional drainage systems. The limited capacity of conventional drainage systems, coupled with increased precipitation due to climate change, requires retrofitting existing infrastructure with source control Sustainable Drainage Systems (SuDS). In this study, a porous medium - BlueLay - was evaluated for its hydraulic performance as a potential sustainable drainage material. BlueLay was tested under various rainfall, gradient and material saturation conditions. BlueLay achieved a 100 % runoff reduction when subjected to a medium intensity storm of 98 mm/hr, and a 51 % runoff reduction when subjected to a high rainfall intensity of 179 mm/hr. Infiltration through BlueLay increased with material saturation, indicating higher runoff reduction capacity during longer duration storms. Saturation tests also indicated that BlueLay can absorb up to 4 × its weight in water. Saturated BlueLay also halved the peak runoff rate. Percolation tests suggested that 2 L of water percolated through dry BlueLay in 2 min. It took 8 min to infiltrate the same volume of water through a comparable volume of soil. Additionally, BlueLay begins to infiltrate water faster after successive periods of full saturation and drying. Results suggest that BlueLay in a state of partial or complete saturation could be used to attenuate road runoff by reducing both runoff volume and attenuating peak flow through infiltration and absorption. These hydraulic properties increase its capability to reduce flood risk. Further research is required to determine if BlueLay can also attenuate pollutants, in addition to quantity reduction. To determine the most suitable application for this material, the performance of BlueLay should be tested when interfaced with other porous media such as vegetated soil and gravel which are found next to roads.
{"title":"Hydraulic performance of BlueLay –a potential sustainable drainage material for mitigating urban road runoff","authors":"Puneeta Sreenivas ,&nbsp;Sarah Cotterill ,&nbsp;Fiachra O’Loughlin","doi":"10.1016/j.clwat.2025.100071","DOIUrl":"10.1016/j.clwat.2025.100071","url":null,"abstract":"<div><div>Increasing prevalence of impervious surfaces can lead to higher surface runoff and overwhelm conventional drainage systems. The limited capacity of conventional drainage systems, coupled with increased precipitation due to climate change, requires retrofitting existing infrastructure with source control Sustainable Drainage Systems (SuDS). In this study, a porous medium - BlueLay - was evaluated for its hydraulic performance as a potential sustainable drainage material. BlueLay was tested under various rainfall, gradient and material saturation conditions. BlueLay achieved a 100 % runoff reduction when subjected to a medium intensity storm of 98 mm/hr, and a 51 % runoff reduction when subjected to a high rainfall intensity of 179 mm/hr. Infiltration through BlueLay increased with material saturation, indicating higher runoff reduction capacity during longer duration storms. Saturation tests also indicated that BlueLay can absorb up to 4 × its weight in water. Saturated BlueLay also halved the peak runoff rate. Percolation tests suggested that 2 L of water percolated through dry BlueLay in 2 min. It took 8 min to infiltrate the same volume of water through a comparable volume of soil. Additionally, BlueLay begins to infiltrate water faster after successive periods of full saturation and drying. Results suggest that BlueLay in a state of partial or complete saturation could be used to attenuate road runoff by reducing both runoff volume and attenuating peak flow through infiltration and absorption. These hydraulic properties increase its capability to reduce flood risk. Further research is required to determine if BlueLay can also attenuate pollutants, in addition to quantity reduction. To determine the most suitable application for this material, the performance of BlueLay should be tested when interfaced with other porous media such as vegetated soil and gravel which are found next to roads.</div></div>","PeriodicalId":100257,"journal":{"name":"Cleaner Water","volume":"3 ","pages":"Article 100071"},"PeriodicalIF":0.0,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480621","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
Investigating the relationship between land use and water quality in urban water bodies
Pub Date : 2025-02-16 DOI: 10.1016/j.clwat.2025.100070
Omur Faruq , Md. Abdul Malak , Nahrin Jannat Hossain , Md. Shamsudduha Sami , Abdul Majed Sajib
Rapid urbanization and industrialization have significantly affected global water safety, particularly in urban areas where land use patterns directly influence surface water quality (WQ). Understanding this complex relationship between Land Use and Land Cover (LULC), and WQ is crucial for sustainable water resources management. This study aimed to investigate the impact of LULC on WQ in 11 water bodies within Khulna City Corporation, Bangladesh. This study employed the Root Mean Squared Water Quality Index (RMS-WQI) model to rank the WQ status of these water bodies. The random forest algorithm was utilized on the Google Earth Engine platform to map LULC. Concurrently, canonical correlation analysis was utilized to assess the relationship between WQ and LULC buffering 100 m around each waterbody. The WQ in the study area was classified between ‘Fair’ and ‘Marginal’ based on WQI scores. The canonical correlation assessment showed that, within the buffer zone, water body size (loadings = −0.027592) and cropland area (loadings = - 0.007411) exhibited negative correlations with WQI, while other LULC variables showed positive associations. In contrast, TDS (loadings = −0.691221) and EC (loadings = 0.721202) emerged as the most significant contributors to the canonical relationship, highlighting their substantial influence on the overall WQI score. However, further studies are necessary to validate these findings by incorporating other crucial WQ indicators and time-series LULC assessments. The overall results demonstrated the suitability of the RMS-WQI model for evaluating WQ status in urban water bodies while acknowledging the inherent uncertainties such as ambiguity and the eclipsing problems. Despite these limitations, this study provides a valuable geospatial perspective on the WQ of urban water bodies, which can be useful for different stakeholders.
{"title":"Investigating the relationship between land use and water quality in urban water bodies","authors":"Omur Faruq ,&nbsp;Md. Abdul Malak ,&nbsp;Nahrin Jannat Hossain ,&nbsp;Md. Shamsudduha Sami ,&nbsp;Abdul Majed Sajib","doi":"10.1016/j.clwat.2025.100070","DOIUrl":"10.1016/j.clwat.2025.100070","url":null,"abstract":"<div><div>Rapid urbanization and industrialization have significantly affected global water safety, particularly in urban areas where land use patterns directly influence surface water quality (WQ). Understanding this complex relationship between Land Use and Land Cover (LULC), and WQ is crucial for sustainable water resources management. This study aimed to investigate the impact of LULC on WQ in 11 water bodies within Khulna City Corporation, Bangladesh. This study employed the Root Mean Squared Water Quality Index (RMS-WQI) model to rank the WQ status of these water bodies. The random forest algorithm was utilized on the Google Earth Engine platform to map LULC. Concurrently, canonical correlation analysis was utilized to assess the relationship between WQ and LULC buffering 100 m around each waterbody. The WQ in the study area was classified between ‘Fair’ and ‘Marginal’ based on WQI scores. The canonical correlation assessment showed that, within the buffer zone, water body size (loadings = −0.027592) and cropland area (loadings = - 0.007411) exhibited negative correlations with WQI, while other LULC variables showed positive associations. In contrast, TDS (loadings = −0.691221) and EC (loadings = 0.721202) emerged as the most significant contributors to the canonical relationship, highlighting their substantial influence on the overall WQI score. However, further studies are necessary to validate these findings by incorporating other crucial WQ indicators and time-series LULC assessments. The overall results demonstrated the suitability of the RMS-WQI model for evaluating WQ status in urban water bodies while acknowledging the inherent uncertainties such as ambiguity and the eclipsing problems. Despite these limitations, this study provides a valuable geospatial perspective on the WQ of urban water bodies, which can be useful for different stakeholders.</div></div>","PeriodicalId":100257,"journal":{"name":"Cleaner Water","volume":"3 ","pages":"Article 100070"},"PeriodicalIF":0.0,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143474087","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
Optimization of coffee grounds-based activated carbon catalyst for ozone water treatment: A Box-Behnken design approach
Pub Date : 2025-02-11 DOI: 10.1016/j.clwat.2025.100069
C.A.L. Graça , O.S.G.P. Soares
This study addresses two pressing environmental issues—resource conservation and waste valorization—while advancing water cleaning solutions. Activated carbon derived from coffee grounds (ACCG) was synthesized to optimize oxalic acid (OXL) removal via catalytic ozonation, as OXL is not effectively degraded by ozone alone, which can lead to its persistence in the environment. A Box-Behnken design approach was used to optimize synthesis conditions, namely dwell temperature (°C), dwell time (h) and %CO2 in gas flow rate, through response surface methodology (RSM). The resulting materials were characterized by thermogravimetric analysis (TGA), specific surface area measurement by nitrogen adsorption-dessorption isotherms at −196 °C, Fourier transform infrared (FTIR) and Scanning electron microscopy (SEM) and energy dispersive x-ray spectroscopy (EDS). The statistical model that describes the response adjusts perfectly to the experimental data with R2 = 0.994 and the analysis of variance (ANOVA) confirms that it is statistically predictive and significant. Optimal synthesis conditions for the highest OXL degradation rate constant (k', min⁻¹) were identified as: 400 °C of dwell temperature, 2 h of dwell time and 70 % of CO2 (v/v). The ACCG prepared under these conditions enabled a k’ 14-fold higher than that achieved with single ozonation. Selective quenching experiments suggest that singlet oxygen (1O2) is the main reactive oxygen species formed during catalytic ozonation. The best performing ACCG was submitted to three reutilization cycles, and although a more prominent activity loss was observed after the 1st cycle, the catalyst maintained good catalytic activity across all cycles, consistently achieving higher OXL removal than ozonation alone. Overall, this study provided a sustainable approach to managing waste by valorizing coffee grounds into effective catalysts while enhancing water treatment efficiency.
{"title":"Optimization of coffee grounds-based activated carbon catalyst for ozone water treatment: A Box-Behnken design approach","authors":"C.A.L. Graça ,&nbsp;O.S.G.P. Soares","doi":"10.1016/j.clwat.2025.100069","DOIUrl":"10.1016/j.clwat.2025.100069","url":null,"abstract":"<div><div>This study addresses two pressing environmental issues—resource conservation and waste valorization—while advancing water cleaning solutions. Activated carbon derived from coffee grounds (ACCG) was synthesized to optimize oxalic acid (OXL) removal via catalytic ozonation, as OXL is not effectively degraded by ozone alone, which can lead to its persistence in the environment. A Box-Behnken design approach was used to optimize synthesis conditions, namely dwell temperature (°C), dwell time (h) and %CO<sub>2</sub> in gas flow rate, through response surface methodology (RSM). The resulting materials were characterized by thermogravimetric analysis (TGA), specific surface area measurement by nitrogen adsorption-dessorption isotherms at −196 °C, Fourier transform infrared (FTIR) and Scanning electron microscopy (SEM) and energy dispersive x-ray spectroscopy (EDS). The statistical model that describes the response adjusts perfectly to the experimental data with R<sup>2</sup> = 0.994 and the analysis of variance (ANOVA) confirms that it is statistically predictive and significant. Optimal synthesis conditions for the highest OXL degradation rate constant (<em>k</em>', min⁻¹) were identified as: 400 °C of dwell temperature, 2 h of dwell time and 70 % of CO<sub>2</sub> (v/v). The ACCG prepared under these conditions enabled a <em>k’</em> 14-fold higher than that achieved with single ozonation. Selective quenching experiments suggest that singlet oxygen (<sup>1</sup>O<sub>2</sub>) is the main reactive oxygen species formed during catalytic ozonation. The best performing ACCG was submitted to three reutilization cycles, and although a more prominent activity loss was observed after the 1st cycle, the catalyst maintained good catalytic activity across all cycles, consistently achieving higher OXL removal than ozonation alone. Overall, this study provided a sustainable approach to managing waste by valorizing coffee grounds into effective catalysts while enhancing water treatment efficiency.</div></div>","PeriodicalId":100257,"journal":{"name":"Cleaner Water","volume":"3 ","pages":"Article 100069"},"PeriodicalIF":0.0,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419117","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
Treatment methods for sugar rich wastewater: A review
Pub Date : 2025-02-04 DOI: 10.1016/j.clwat.2025.100067
Sadia Fida , Maria Yasmeen , Rabia Adnan , Muhammad Zeeshan
Sugarcane has been recognized as a cash crop in both developed and developing countries for the past century. The sugar manufacturing process requires large volumes of water and consequently generates high-strength wastewater, which, if not treated properly, poses significant environmental risks. This review paper focuses on various treatment techniques for sugar industry effluents including physicochemical, aerobic, anaerobic, and membrane-based approaches. While aerobic and membrane-based methods yield promising results, they are not cost-effective due to high energy demands and challenges related to sludge disposal. Anaerobic methods are more energy-efficient, enabling energy recovery as methane and hydrogen gas while producing less sludge. Sugar industry effluents, which have high organic concentrations, offer great potential for energy recovery through anaerobic treatment. However, the application of anaerobic methods on a commercial scale is limited by long startup periods and seasonal variations in effluent characteristics. The combination of high-rate anaerobic and aerobic methods has proven effective for treating high-strength wastewater.
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引用次数: 0
Synergistic effect of magnetic magnetite and greigite nanoparticles dispersed pinewood biochar for aqueous lead(II) and cadmium(II) adsorption
Pub Date : 2025-02-03 DOI: 10.1016/j.clwat.2025.100068
Prashan M. Rodrigo , Raghava R. Kommalapati
Heavy metals such as lead and cadmium cause adverse effects on all living organisms. Their remediation is complex in the aqueous phase. Biochar is a low-cost, environmentally friendly adsorbent material that exhibited a limited ability to adsorb Pb2+ and Cd2+. Iron-based magnetite and greigite nanoparticles have proven high adsorption capacity due to high amounts of oxygen and sulfur-contained functional groups per unit volume. In this study, a mixture of greigite and magnetite nanoparticles was simultaneously synthesized on pinewood biochar (BC), aiding co-precipitation from a Fe2+/Fe3+ and S2- salts mixture (Fe3O4-Fe3S4/BC), that offers a cost-effective, sustainable, and efficient material for Pb2+ and Cd2+ removal. BC, Fe3O4-Fe3S4/BC, and Pb2+ and Cd2+ adsorbed Fe3O4-Fe3S4/BC materials were characterized to differentiate surface morphologies, elemental compositions, and surface chemical states. The Fe3O4-Fe3S4/BC composite exhibited an average nanoparticle diameter of ∼20 nm. Fe3O4-Fe3S4/BC showed Langmuir adsorption capacities of 138.9 and 49.5 mg g-1 for Pb2+ and Cd2+ at pH 5 (25 °C). Pb2+ and Cd2+ followed pseudo-second-order kinetics, and the equilibriums were achieved after ∼2 h and ∼30 min, respectively, for 125 and 1250 μmol L-1 concentrations, respectively, where the fast adsorption rates make Fe3O4-Fe3S4/BC hybrid system a practical option for real-time treatment. Further, adsorption performances were influenced by ionic strength, dose optimization, and the presence of competing ions, suggesting the potential for fine-tuning adsorbent conditions in practical applications. This study enhanced the understanding of adsorption characteristics for a treatment facility that can effectively remediate lead and cadmium-contaminated wastewater. While there have been studies on using biochar and nanoparticles separately for Pb2+ and Cd2+ adsorption, this research bridges the gap by demonstrating the synergistic effect for Pb2+ and Cd2+ adsorption from hybrid magnetite-greigite nanoparticles.
{"title":"Synergistic effect of magnetic magnetite and greigite nanoparticles dispersed pinewood biochar for aqueous lead(II) and cadmium(II) adsorption","authors":"Prashan M. Rodrigo ,&nbsp;Raghava R. Kommalapati","doi":"10.1016/j.clwat.2025.100068","DOIUrl":"10.1016/j.clwat.2025.100068","url":null,"abstract":"<div><div>Heavy metals such as lead and cadmium cause adverse effects on all living organisms. Their remediation is complex in the aqueous phase. Biochar is a low-cost, environmentally friendly adsorbent material that exhibited a limited ability to adsorb Pb<sup>2+</sup> and Cd<sup>2+</sup>. Iron-based magnetite and greigite nanoparticles have proven high adsorption capacity due to high amounts of oxygen and sulfur-contained functional groups per unit volume. In this study, a mixture of greigite and magnetite nanoparticles was simultaneously synthesized on pinewood biochar (BC), aiding co-precipitation from a Fe<sup>2+</sup>/Fe<sup>3+</sup> and S<sup>2-</sup> salts mixture (Fe<sub>3</sub>O<sub>4</sub>-Fe<sub>3</sub>S<sub>4</sub>/BC), that offers a cost-effective, sustainable, and efficient material for Pb<sup>2+</sup> and Cd<sup>2+</sup> removal. BC, Fe<sub>3</sub>O<sub>4</sub>-Fe<sub>3</sub>S<sub>4</sub>/BC, and Pb<sup>2+</sup> and Cd<sup>2+</sup> adsorbed Fe<sub>3</sub>O<sub>4</sub>-Fe<sub>3</sub>S<sub>4</sub>/BC materials were characterized to differentiate surface morphologies, elemental compositions, and surface chemical states. The Fe<sub>3</sub>O<sub>4</sub>-Fe<sub>3</sub>S<sub>4</sub>/BC composite exhibited an average nanoparticle diameter of ∼20 nm. Fe<sub>3</sub>O<sub>4</sub>-Fe<sub>3</sub>S<sub>4</sub>/BC showed Langmuir adsorption capacities of 138.9 and 49.5 mg g<sup>-1</sup> for Pb<sup>2+</sup> and Cd<sup>2+</sup> at pH 5 (25 °C). Pb<sup>2+</sup> and Cd<sup>2+</sup> followed pseudo-second-order kinetics, and the equilibriums were achieved after ∼2 h and ∼30 min, respectively, for 125 and 1250 μmol L<sup>-1</sup> concentrations, respectively, where the fast adsorption rates make Fe<sub>3</sub>O<sub>4</sub>-Fe<sub>3</sub>S<sub>4</sub>/BC hybrid system a practical option for real-time treatment. Further, adsorption performances were influenced by ionic strength, dose optimization, and the presence of competing ions, suggesting the potential for fine-tuning adsorbent conditions in practical applications. This study enhanced the understanding of adsorption characteristics for a treatment facility that can effectively remediate lead and cadmium-contaminated wastewater. While there have been studies on using biochar and nanoparticles separately for Pb<sup>2+</sup> and Cd<sup>2+</sup> adsorption, this research bridges the gap by demonstrating the synergistic effect for Pb<sup>2+</sup> and Cd<sup>2+</sup> adsorption from hybrid magnetite-greigite nanoparticles.</div></div>","PeriodicalId":100257,"journal":{"name":"Cleaner Water","volume":"3 ","pages":"Article 100068"},"PeriodicalIF":0.0,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143139013","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
Review and selection methodology for water treatment systems in mobile encampments for military applications
Pub Date : 2025-01-31 DOI: 10.1016/j.clwat.2025.100065
Jacob Rubel , Frank Buysschaert , Veerle Vandeginste
Securing a steady supply of water and energy is vital for the success of mobile operations in emergency and military situations. A mobile energy and water supply systems (EWSS) seeks to guarantee these resources through the use of renewable energy, hydrogen energy storage, and built-in water purification systems. The design of these water treatment systems involves a series of interesting challenges regarding the selection of treatment technologies and their interactions with the energy system. This work seeks to review the available water treatment technologies and evaluate their application in mobile water treatment systems as well as suitability for the production of ultrapure water to generate hydrogen via electrolysis. Each technology is evaluated using a technique for order preference by similarity to ideal solution (TOPSIS) multi-criteria decision making (MCDM) to provide a guide for the selection of water treatment technologies for mobile water treatment systems in an EWSS. Based on their TOPSIS scores, GAC filtration, membrane distillation, UV treatment, ultrafiltration, and microfiltration stood out as key technologies for a mobile water treatment system.
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引用次数: 0
Influence of plant species on triclosan removal and associated microbial communities in the vertical-flow constructed wetland
Pub Date : 2025-01-27 DOI: 10.1016/j.clwat.2025.100066
Naveen Chand , Vineet Singh , Surindra Suthar
This study investigated plant species' role in removing triclosan (TCS) and functional bacterial diversity in the rhizosphere of vertical flow-constructed wetlands (VFCWs). Two VFCWs with similar configurations but different plants i.e., Colocasia (CB-VFCW) and Typha (TB-VFCW) were established and TCS removal was recorded under four cycles of 216 hrs HRT. The TB-VFCWs showed the maximum average TCS removal (89.41 %) during studied HRT than CB-VFCWs (79.4 %) (p > 0.05). The respective removal of COD, NH4+-N and NO3- -N was found to be 89.5 %, 84.8 % and 77.5 % in TB-TFCW and 79.88 %, 87.16 % and 66.25 % in CB-VFCWs, suggesting significant variations between VFCWs. 16S data analysis suggested variations between CB-VFCW and TB-VFCW for bacterial abundance, species diversity and richness. Proteobacteria especially the Beta subdivision found to be the dominant bacterial community showing positive correlations with TCS reductions. Results found that plant species selection could be a valuable approach for the enrichment of ecologically relevant microbiota in VFCWs involved in organic pollutant removals in such systems.
{"title":"Influence of plant species on triclosan removal and associated microbial communities in the vertical-flow constructed wetland","authors":"Naveen Chand ,&nbsp;Vineet Singh ,&nbsp;Surindra Suthar","doi":"10.1016/j.clwat.2025.100066","DOIUrl":"10.1016/j.clwat.2025.100066","url":null,"abstract":"<div><div>This study investigated plant species' role in removing triclosan (TCS) and functional bacterial diversity in the rhizosphere of vertical flow-constructed wetlands (VFCWs). Two VFCWs with similar configurations but different plants i.e., <em>Colocasia</em> (CB-VFCW) and <em>Typha</em> (TB-VFCW) were established and TCS removal was recorded under four cycles of 216 hrs HRT. The TB-VFCWs showed the maximum average TCS removal (89.41 %) during studied HRT than CB-VFCWs (79.4 %) (<em>p</em> &gt; 0.05). The respective removal of COD, NH<sub>4</sub><sup>+</sup>-N and NO<sub>3</sub><sup>-</sup> -N was found to be 89.5 %, 84.8 % and 77.5 % in TB-TFCW and 79.88 %, 87.16 % and 66.25 % in CB-VFCWs, suggesting significant variations between VFCWs. 16S data analysis suggested variations between CB-VFCW and TB-VFCW for bacterial abundance, species diversity and richness. Proteobacteria especially the Beta subdivision found to be the dominant bacterial community showing positive correlations with TCS reductions. Results found that plant species selection could be a valuable approach for the enrichment of ecologically relevant microbiota in VFCWs involved in organic pollutant removals in such systems.</div></div>","PeriodicalId":100257,"journal":{"name":"Cleaner Water","volume":"3 ","pages":"Article 100066"},"PeriodicalIF":0.0,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143139014","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
Mapping groundwater potential zone by robust machine learning algorithms & remote sensing techniques in agriculture dominated area, Bangladesh
Pub Date : 2025-01-11 DOI: 10.1016/j.clwat.2025.100064
M. M. Shah Porun Rana , Muhammad Tauhidur Rahman , Md Fuad Hassan
An important part of the ecosystem is groundwater. These resources of Bangladesh are under tremendous pressure from both natural and human-caused factors. Groundwater is essential for fulfilling water requirements in the agricultural Pabna district of Bangladesh, where over-extraction for local, manufacturing, and farming uses has led to considerable water shortages. It is highly expanded in the aspect of industry and agriculture practices. This region's distinctive physiography, extensive agriculture, dryness, low rainfall, and abundant water supply all contribute to the low groundwater depth. The enhancement of human accessibility to sufficient quantities and high-quality groundwater resources is one of the major goals of this research. Several machine learning algorithms and analytical hierarchy process (AHP) models along with geographic information systems (GIS) software integrate sixteen thematic layers, including elevation, slope, soil types, topographic wetness index (TWI), normalized difference water index (NDWI), normalized difference vegetation index (NDVI), curvature, soil permeability, physiography, topographic position index (TPI), terrain roughness index (TRI), stream power index (SPI), distance from river, rainfall, drainage density, and land use land cover (LULC) to create a groundwater potential zone map. Furthermore, the research uses 340 well and non-well sites as inventory data. This is randomly divided into two datasets: training (80 %) and testing (20 %). The resultant groundwater potential zone map is divided into five categories: extremely poor, very poor, moderate, good, and excellent. Every model that was validated using the ROC curve has an AUC-ROC value of more than 0.90. The study's conclusions will help decision-makers save groundwater for long-term usage in areas experiencing a water shortage.
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引用次数: 0
A systematic literature review of forecasting and predictive models for enterococci intrusion in aquatic ecosystems
Pub Date : 2025-01-11 DOI: 10.1016/j.clwat.2025.100063
Philomina Onyedikachi Peter , Edoardo Bertone , Rodney A. Stewart
Ensuring the quality of recreational waters is critical for safeguarding public health and supporting tourism-driven economies. However, rising levels of Enterococci (ENT) present significant risks to aquatic ecosystems and human well-being. Predicting ENT concentrations and understanding their environmental and anthropogenic drivers are essential for effective water resource management and the mitigation of health risks. This systematic review explores the existing body of research on water quality modeling by analyzing various model types, their applications, and their effectiveness. It identifies rainfall and storms as primary drivers of elevated ENT concentrations, emphasizing the critical role of environmental factors in shaping water quality. Additionally, human and animal waste, particularly from sewage intrusion, are highlighted as significant sources of ENT, underscoring the need to address anthropogenic impacts on water contamination. Process-based and data-driven models emerge as prominent tools for forecasting ENT levels in recreational waters. While both approaches are widely utilized, the review notes the difficulty in directly comparing their performance due to methodological variations. By synthesizing findings from diverse studies, the review provides insights into the complex relationships between predictors such as rainfall, ENT levels, and associated health risks from human exposure. The review also addresses the health implications of ENT contamination by identifying its primary sources and associated diseases, enhancing understanding of its broader impacts on public health. Furthermore, it offers evidence-based recommendations for selecting appropriate models to predict ENT levels, empowering researchers and water resource managers to design more effective water quality management strategies. These insights may contribute to reducing the prevalence of waterborne diseases associated with recreational water use, ultimately promoting safer and more sustainable aquatic environments.
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引用次数: 0
Climate adaptation and resilience of biofiltration as a low-cost technological solution for water treatment – A critical review
Pub Date : 2025-01-02 DOI: 10.1016/j.clwat.2024.100062
Adedamola Adesomi Ali, Oliver Terna Iorhemen, Ronald W. Thring
The water supply and sanitation sector has become vulnerable due to extreme weather events such as flooding, wildfires, and droughts. Following wildfires, the erosion of ashes and unburnt carbon into surface water bodies results in higher turbidity and total suspended solids in surface water, along with elevated concentrations of dissolved organic matter. This deterioration in water quality increases the difficulty of treating these waters for human consumption, highlighting the urgent need for adaptive water treatment methods. Amid these challenges, biofiltration has emerged as a sustainable, low-cost techno-ecological solution, recognized for its ability to enhance water quality while remaining environmentally friendly. The effectiveness of biofiltration stems from its utilization of microbial communities and natural processes, enabling it to adapt and recover from disruptions. Despite the threats posed by climate change, biofiltration systems have shown strong potential for resilience, although this resilience depends on a thorough understanding of the challenges brought on by climate change. This paper reviews the impacts of extreme weather events on water quality and the operations of water treatment plants. It highlights several conventional water treatment methods and discusses their insufficiencies in treating emerging contaminants. The mechanisms through which biofiltration removes contaminants as well as the key parameters that influence biofiltration such as biofilter media, types of microorganisms, temperature, pH, nutrients supply, etc and the dominant microbes present in biofilters were reviewed. The adaptation and resilience of biofiltration systems to challenges posed by climate change in water treatment was extensively discussed. The limitations and opportunities related to the adaptation and resilience of biofiltration were discussed, emphasizing the need for more proactive measures to optimize biofiltration systems.
{"title":"Climate adaptation and resilience of biofiltration as a low-cost technological solution for water treatment – A critical review","authors":"Adedamola Adesomi Ali,&nbsp;Oliver Terna Iorhemen,&nbsp;Ronald W. Thring","doi":"10.1016/j.clwat.2024.100062","DOIUrl":"10.1016/j.clwat.2024.100062","url":null,"abstract":"<div><div>The water supply and sanitation sector has become vulnerable due to extreme weather events such as flooding, wildfires, and droughts. Following wildfires, the erosion of ashes and unburnt carbon into surface water bodies results in higher turbidity and total suspended solids in surface water, along with elevated concentrations of dissolved organic matter. This deterioration in water quality increases the difficulty of treating these waters for human consumption, highlighting the urgent need for adaptive water treatment methods. Amid these challenges, biofiltration has emerged as a sustainable, low-cost techno-ecological solution, recognized for its ability to enhance water quality while remaining environmentally friendly. The effectiveness of biofiltration stems from its utilization of microbial communities and natural processes, enabling it to adapt and recover from disruptions. Despite the threats posed by climate change, biofiltration systems have shown strong potential for resilience, although this resilience depends on a thorough understanding of the challenges brought on by climate change. This paper reviews the impacts of extreme weather events on water quality and the operations of water treatment plants. It highlights several conventional water treatment methods and discusses their insufficiencies in treating emerging contaminants. The mechanisms through which biofiltration removes contaminants as well as the key parameters that influence biofiltration such as biofilter media, types of microorganisms, temperature, pH, nutrients supply, etc and the dominant microbes present in biofilters were reviewed. The adaptation and resilience of biofiltration systems to challenges posed by climate change in water treatment was extensively discussed. The limitations and opportunities related to the adaptation and resilience of biofiltration were discussed, emphasizing the need for more proactive measures to optimize biofiltration systems.</div></div>","PeriodicalId":100257,"journal":{"name":"Cleaner Water","volume":"3 ","pages":"Article 100062"},"PeriodicalIF":0.0,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143138344","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
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Cleaner Water
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