Water Environment Research最新文献

{"title":"Removal of polystyrene microplastics from wastewater by Ti-Al electrode electrocoagulation under pulse current: Efficiency and mechanism.","authors":"Bin Zheng, Haixia Wu, Min Zhang, Shaohua Lin","doi":"10.1002/wer.70057","DOIUrl":"https://doi.org/10.1002/wer.70057","url":null,"abstract":"<p><p>As microplastic pollution in aquatic ecosystems continues to rise, research on wastewater treatment methods designed to address microplastics has gained significant attention. To reduce the power consumption of electrocoagulation, this study presents an approach using Ti-Al electrode under pulsed current conditions to address polystyrene (PS) microplastic contamination in wastewater. After selecting the appropriate electrode materials and shapes, we conducted a comprehensive investigation into the effects of various operational parameters-such as initial solution pH, electrolyte concentration, current density, pulse frequency, and pulse duty cycle-on PS removal efficiency. Under optimal conditions (electrode spacing of 1 cm, current density of 4 A·m^-2, pulse duty cycle of 40%, pulse frequency of 500 Hz, initial solution pH of 7, and electrolyte concentration of 0.05 mol·L^-1), the removal efficiency of PS reached 93.24%, with a power consumption of 0.00977 kWh·mg^-1. Analysis of the resulting flocs revealed that free radicals generated during the electrocoagulation process disrupted the microplastic surfaces and facilitated the formation of Ti and Al flocs, which ultimately removed the microplastics through a combination of adsorption, electro-neutralization, and capture mechanisms. This study demonstrates the effectiveness of Ti electrode electrocoagulation for treating microplastic-laden wastewater and provides valuable insights for advancing microplastic treatment technologies. PRACTITIONER POINTS: Using pulse current electrocoagulation to remove polystyrene microplastics from wastewater. Titanium electrodes outperforms traditional electrodes ()in terms of efficiency and energy consumption. The mechanism for removing polystyrene microplastics using titanium electrodes in pulse current electrocoagulation was proposed. Titanium electrode electrocoagulation is effective in removing microplastics from wastewater and provides a reference for actual wastewater treatment.</p>","PeriodicalId":23621,"journal":{"name":"Water Environment Research","volume":"97 3","pages":"e70057"},"PeriodicalIF":2.5,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143650692","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}

{"title":"Preparation of the titanium-based composite coagulant PTFS and its coagulation performance on nanoparticles.","authors":"Zihan Wang, Jingqian Ma, Kun Wu, Wenquan Sun, Yongjun Sun","doi":"10.1002/wer.70023","DOIUrl":"https://doi.org/10.1002/wer.70023","url":null,"abstract":"<p><p>In this study, a titanium-based coagulant, (i.e., PTFS), with a three-dimensional spatial mesh structure was prepared for the coagulation removal of polystyrene (PS) and titanium dioxide (TiO₂) nanoparticles in water. The results of scanning electron microscopy, TGA-DSC, Fourier infrared spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy characterization showed that the PTFS was not a simple mixture of raw materials and a chemical reaction occurred, thereby generating new chemically connected bonds. The optimum removal of PS could reach 92.5% at the dosage of 0.6 mg/L, initial concentration of 70 mg/L, pH of 7, stirring intensity of 350 rpm, settling time of 60 min, and kaolin concentration of 70 mg/L. The best removal rate of TiO₂ could reach 95.3% when the dosage was 0.8 mg/L, the initial concentration was 70 mg/L, the pH was 7, the stirring intensity was 350 rpm, the settling time was 60 min, and the kaolin concentration was 50 mg/L. The flocs produced by PTFS were large and dense. In the early stage of coagulation, the flocculation mechanism was dominated by electroneutralization, and in the middle and late stages of coagulation, adsorption, bridging, and netting were dominated. This study aims to provide a reference for the removal of nanopollutants by coagulation in the actual water treatment process. PRACTITIONER POINTS: A titanium-based coagulant PTFS with a three-dimensional spatial mesh structure was prepared. PTFS effectively removes nano-PS and nano-TiO₂ from water. The flocs produced by PTFS were large and dense flocs. Removal of PS and TiO₂ by PFTS has been a combination of multiple coagulation mechanisms.</p>","PeriodicalId":23621,"journal":{"name":"Water Environment Research","volume":"97 2","pages":"e70023"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143123648","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}

{"title":"Bioaccumulation of selected metals in Lamproglena clariae Fryer, 1956 infecting Clarias gariepinus (Burchell, 1822) collected from six sampling sites along the Vaal River, South Africa.","authors":"Marilie Pretorius, Andreas Gradwohl, Jakob Windisch, Franz Jirsa, Annemariè Avenant-Oldewage","doi":"10.1002/wer.70037","DOIUrl":"10.1002/wer.70037","url":null,"abstract":"<p><p>Lamproglena clariae, a gill parasite of Clarias gariepinus has previously been identified as a valuable indicator of effect for organic and metal pollution. The current study evaluates it as a bioindicator of metal accumulation by recording the concentration (mg/kg) of Mn, Fe, Zn, Se, and Sr in adult females and eggs collected at six sites along the Vaal River, South Africa. The data are compared to the metal concentrations recorded in water and sediment, and with infection variables calculated for L. clariae collected from C. gariepinus in March 2017 and October 2018. Metal concentrations in parasite samples were measured utilizing total reflection X-ray fluorescence spectroscopy. This was the first time this method was used to measure metal concentration in L. clariae. Manganese, Fe, Cu, Se, and Sr concentrations differed between adult females and egg specimens and between the six sampling sites, following the difference in the metal concentrations in the water and sediment samples. More polluted sites had low prevalence and low abundance of L. clariae. In adult females, Mn, Fe, Cu, Zn, Se, and Sr had higher concentrations than the water at the more polluted sites. Metal concentration (Mn, Zn, Cu, and Se) was higher in adult females compared to eggs. However, the Fe concentrations were higher in eggs than in adult females. Metal concentrations in L. clariae females were generally higher than levels recorded in water and sediment samples, indicating biomagnification, and supporting the viability of L. clariae as an accumulation indicator. High concentrations of Fe in eggs suggest that Fe elimination may occur via vitellin maternal transfer to larvae. PRACTITIONER POINTS: Fish ectoparasites have not received sufficient evaluation as indicators of pollution. Lamproglena clariae bioaccumulates metals in polluted environments. Lamproglena clariae eggs accumulate Fe to higher concentrations than the females that produce them.</p>","PeriodicalId":23621,"journal":{"name":"Water Environment Research","volume":"97 2","pages":"e70037"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11807600/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143383331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison and prediction of shallow groundwater nitrate in Shaying River basin based on urban distribution using multiple machine learning approaches.","authors":"Zipeng Huang, Baonan He, Yanjia Chu, Yuanbo Song, Zheng Shen","doi":"10.1002/wer.70033","DOIUrl":"https://doi.org/10.1002/wer.70033","url":null,"abstract":"<p><p>Groundwater, a pivotal water resource in numerous regions worldwide, confronts formidable challenges posed by severe nitrate pollution. Traditional research methodologies aimed at addressing groundwater nitrate contamination frequently struggle to accurately depict the intricate conditions of the groundwater environment, particularly when dealing with high variability and nonlinear data. However, the advent of machine learning (ML) has heralded an innovative approach to simulating groundwater dynamics. In this study, six ML algorithms were deployed to model the concentrations of shallow groundwater nitrates in the Shaying River Basin. The efficacy of each model was assessed through comprehensive metrics including the coefficient of determination (R²), mean absolute error (MAE), and root mean square error (RMSE), gauging the alignment between observed and predicted groundwater nitrate levels. Subsequently, to discern the principal environmental factors influencing NO₃-N concentrations, the most proficient model was selected. Among the array of models, the XGB algorithm, renowned for its capacity to handle extreme values, demonstrated superior performance (R² = 0.773, MAE = 7.625, RMSE = 11.92). Through an in-depth analysis of groundwater NO₃-N across major urban centers, Fuyang city was identified as the most heavily contaminated locale, attributing the phenomenon to potential sources such as domestic sewage and agricultural activities (feature importance of Cl^- = 78.64%). Conversely, Zhengzhou city emerged as the least polluted city, with notable influences from K⁺ and NO₂ ^- (feature importance = 52.06% and 18.41%), indicative of a prevailing reducing environment compared to other cities. In summation, this study explores a methodology for amalgamating diverse environmental variables in the investigation of groundwater contamination. Such insights hold profound implications for the effective management and mitigation of nitrate contamination in the Shaying River Basin, offering a demonstration for similar endeavors in analogous regions. PRACTITIONER POINTS: Six machine learning models were utilized to simulate the nitrate contamination. XGB model for groundwater nitrate pollution prediction outperformed other models. Relative importance of environmental variables was identified using the XGB model. Impact of main environmental variables on groundwater nitrate was discussed.</p>","PeriodicalId":23621,"journal":{"name":"Water Environment Research","volume":"97 2","pages":"e70033"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143383336","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}

{"title":"Simultaneous removal of cationic and anionic dyes by highly efficient and recyclable ZIF-67/expanded vermiculite (ZIF-67/EV) composites.","authors":"Salman Ahmadipouya, Hossein Molavi","doi":"10.1002/wer.70027","DOIUrl":"https://doi.org/10.1002/wer.70027","url":null,"abstract":"<p><p>This study focuses on the synthesis of composite materials using Zeolitic imidazolate frameworks (ZIF-67) nanoparticles as an effective adsorbent, along with different concentrations (2-10%) of thermally expanded vermiculite (EV) as a low-cost and natural adsorbent substrate. The pristine materials and their composites were fully characterized using XRD, FTIR, BET, SEM, zeta potential, and EDS techniques. The pseudo-second-order kinetic model described both organic dyes' adsorption on synthesized adsorbents. Accordingly, the calculated adsorption capacities of Congo Red (CR) and Malachite Green (MG) dyes over the synthesized adsorbents were found to be about 22.72 and 49.02 mg/g for pure EV, 100 and 100 mg/g for pure ZIF-67, 90.91 and 100 mg/g for ZIF-67/EV-2, 100 and 100 mg/g for ZIF-67/EV-5, 95.24 and 99.01 mg/g for ZIF-67/EV-7, and 92.59 and 97.09 mg/g for ZIF-67/EV-10, respectively. The Langmuir isotherm model fits experimental isotherm data best in the studied temperature range (298-313 K). Among the synthesized adsorbent materials, the ZIF-67/EV-5 composite (containing 5% EV flakes) showed the highest maximum adsorption capacities of 1428.6 and 1114.2 mg/g for MG and CR dyes at pH 7 and 298 K. Moreover, it showed the highest removal efficiency (up to 99.5%) toward both cationic MG and anionic CR dyes in the binary mixture of both dyes. Finally, the regeneration and recyclability of this composite showed a 12% decrease in dye removal after five adsorption cycles. The synthesized ZIF-67/EV composites may therefore be used as efficient and inexpensive adsorbent materials for the simultaneous removal of cationic and anionic dyes from contaminated water. PRACTITIONER POINTS: ZIF-67/expanded vermiculite composites were synthesized and used to simultaneously remove cationic and anionic dyes from wastewater. Kinetics, isotherms, and thermodynamics of adsorption were studied showing good removal of both dyes. The ZIF-67/EV-5 composite achieved maximum adsorption capacities of 1428.6 and 1114.2 mg/g for cationic Malachite Green and anionic Congo Red dyes, respectively. Various interactions like π-π stacking and coordination are proposed as mechanisms of adsorption. The composite showed good selectivity in separating dyes and maintained high removal efficiency even after 5 reuse cycles.</p>","PeriodicalId":23621,"journal":{"name":"Water Environment Research","volume":"97 2","pages":"e70027"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143383344","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}

{"title":"Seasonal variations and correlation analysis of water quality parameters in the Chambal River, Rajasthan, India.","authors":"Krishna Pal Singh, Abhishek Saxena","doi":"10.1002/wer.70035","DOIUrl":"https://doi.org/10.1002/wer.70035","url":null,"abstract":"<p><p>The study investigated the water quality of the Chambal River from 2010 to 2022 throughout the year. The measured parameters like pH, EC (Electrical Conductivity), TDS (Total Dissolved Solids), and Total Hardness (TH) fluctuate between 7.70 and 8.35 (with an average of 8), 289 and 484 μS/cm (with an average of 347 μS/cm), 185 and 315 mg/l (with an average of 224 mg/l), and 68 and 120 mg/l (with an average of 93 mg/l), respectively, on the yearly basis. While the turbidity, nitrate levels, ammonia nitrogen, fluoride, and boron dissolved) fluctuate between 0.79 and 8 NTU (with an average of 2 NTU), 0.38 and 2 mg/l (with an average of 0.92 mg/l), 0.06 and 0.61 mg/l (with an average of 0.22 mg/l), 0.24 and 0.94 mg/l (with an average of 0.67 mg/l), and 0.04 and 0.33 mg/l (with an average of 0.16 mg/l), respectively, on the yearly basis. The water Quality Index (WQI) ranges between 10 to 149 with an average of 73 on a yearly basis. However, WQI ranges between 27 to 95 (with an average of 56) in summer, 6 to 294 (with an average of 116) in rainy, 4 to 123 (with an average of 156) in autumn, and 1 to 82 (with an average of 52) in winter. These results indicate a poor overall Water Quality Index (WQI), rendering the Chambal River's water unsuitable for drinking purposes. Furthermore, the principal component analysis and dendrogram analysis were used in this study. The findings highlight the urgent need for stricter pollution control measures to safeguard the river's health. PRACTITIONER POINTS: The present study is based on Seasonal Variations and Correlation Analysis of Water Quality Parameters via multiparametric approaches from 2010 to 2022 throughout the year in the Chambal River, Rajasthan, India. Two types of statistics (Principal Component Analysis and Dendrogram analysis) have been applied here to know the variation and distribution of WQI. pH fluctuated within the IS standard, with a slight summer alkalinity increase. EC remained stable, higher in summer due to evaporation. Turbidity peaked in the monsoon and reduced in dry periods. Poor overall Water Quality Index (WQI) was found in the sampling site hence the reader of the discussed journal may take an interest in it. Urgent need to control the river's health from the different pollutants. Pearson correlation analysis reveals strong positive correlations between WQI, turbidity, pH, TDS, TH, and EC while negative correlations are observed between these clusters and boron concentration.</p>","PeriodicalId":23621,"journal":{"name":"Water Environment Research","volume":"97 2","pages":"e70035"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143392003","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}

{"title":"Spatial distribution of health risk assessment of a drinking water reservoir exposed to urban agglomeration and industrial lead contamination in Istanbul, Türkiye.","authors":"Hüseyin Cüce, Erkan Kalipci, Fikret Ustaoğlu, Mehmet Ali Dereli, Seda Alkaya, Aysun Türkmen","doi":"10.1002/wer.70013","DOIUrl":"10.1002/wer.70013","url":null,"abstract":"<p><p>The Ömerli Dam, supplied by multiple rivers that provide a major amount of Istanbul's water demands for drinking and irrigation, is experiencing toxicological threats due to rapid expansion, increased industrial activity, and population growth in light of the impending global drought. In this study, multivariate statistical analysis and spatial distribution based on geographic information system (GIS) was used to examine the status of pollution and health risk, irrigation water quality, and stochastic geo-environmental risk sources of 16 potentially toxic elements (PTEs: Na, Mg, K, Ca, Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Cd, Hg, and Pb) concentrations from samples in the dam. Also, spatial analyzing of quality indices was used to assess the dam's feasibility for irrigation and drinking. As per the results of the study, the dam water has mild heavy metal (loid) pollution, which is measured at 16 PTE by the heavy metal (loid) pollution index (HPI) and heavy metal (loid) evaluation index (HEI) values. The pollution level is low during the rainy season and moderate during the dry season. The water at sampling station S3 (HPI = 146.50) is unfit for consumption and cannot be used for drinking. The majority of harmful metal species exhibited elevated concentrations (notably Pb: 51.78 μg/L, Cr: 8.55 μg/L) in the dam lake water, particularly during the dry season. The toxic metals Pb and Cd account for 15.95% of the total variance, with a high degree of loading. Lead concentrations were found to be above WHO and USEPA limit values only in S2 and S4 during the wet season, but above 0.01 mg/L in all stations except S1 during the dry. Dam water is acceptable for agricultural use, according on the results of the, sodium absorption rate, the percentage of Na and the magnesium damage index, average SAR < 0.9, Na% < 25, and MH < 50, respectively. HQ_ingestion and HI values (all less than 1 in all PTEs) indicate that noncarcinogenic impacts might occur. PRACTITIONER POINTS: Ömerli Dam provides most of the drinking and potable water needs of a mega city like Istanbul. With this study, toxic metal pollution of dam surface water and its possible effects on human health were analyzed for the first time on a spatially wide scale.</p>","PeriodicalId":23621,"journal":{"name":"Water Environment Research","volume":"97 2","pages":"e70013"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11790516/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143123651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterization, distribution, and risk assessment of microplastic in fish and sediment from the longest river of Bangladesh.","authors":"Shahrima Siddiqa, Sneha Gautam, Shamima Akther Eti, Fatima Khatun, Mohammad Mahbubur Rahman, H M Solayman, Azrina Abd Aziz, Badiuzzaman Khan","doi":"10.1002/wer.70029","DOIUrl":"https://doi.org/10.1002/wer.70029","url":null,"abstract":"<p><p>Microplastics (particles smaller than 5 mm) are among the most common pollutants in aquatic habitats because they may develop to high densities and can interact with both the abiotic and biotic environments. There is less information available on microplastics in the freshwater systems than there is in the marine environment. This study aims to shed light on the abundance and spatial distribution of microplastics in the Brahmaputra River (Mymensingh) through the utilization of the wet peroxide oxidation isolation technique, supplemented with sodium chloride, to examine fish and sediment specimens collected between December 21, 2022 and January 12, 2023. A total of 26 and 189 microplastic particles were identified in the fish and sediment samples, respectively. Microplastics (MPs) concentrations in fish gut ranged from 0.5 ± 0.7 to 1.67 ± 0.58 MPs individual^-1. The most prevalent shape found in fish stomachs was fiber (46%), and the most common color was transparent (32%). Sizes 0.5-1 mm (1.6 ± 0.74) had the most microplastics. This study found that fishes from the demersal (3.25 ± 1.7) zone had more MPs than the benthopelagic (2.5 ± 0.58) and pelagic (1.5 ± 0.7) zones. Omnivorous fishes (54%) consumed more microplastics than carnivorous (31%, 2.6 ± 0.58) and herbivorous fishes (15%,1.33 ± 0.94). Microplastic consumption had a moderate correlation with fish body weight (r = 0.34), length (r = 0.46), and gastrointestinal content (r = 0.45). The MPs per kilogram of Brahmaputra River bed sediment ranged from 8 to 31, with a mean abundance of 18.9 ± 7.01 particles kg^-1. The most common shape identified in this study was fragments (52%) and 33% of sediment microplastics were blue in color. Microplastics were most abundant in the 1-3 m-meter size class. Fourier transform infrared spectroscopy (FTIR) showed that polypropylene (PP) was the most prevalent MP in both fish (34%) and sediment (40%) samples. In this study, the Pollution load index (PLI) for each sampling site is <10, with the highest value found for station 2(1.97 ± 0.49), regarded as risk category I. This study's results will be useful for future research on microplastics in freshwater environments. PRACTITIONER POINTS: Abundance and distribution of microplastics were determined from the longest river of Bangladesh. The structural properties of microplastics were characterized using ATR-FTIR spectroscopy. Pollution load index (PLI) of microplastics was investigated.</p>","PeriodicalId":23621,"journal":{"name":"Water Environment Research","volume":"97 2","pages":"e70029"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143366097","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}

{"title":"Medicinal and aromatic plants assisted bioremediation of ammonical and bacterial contaminants in aquaponics water.","authors":"Kalpana Arambam, Kishore Kumar Krishnani, Rajkumar Debarjeet Singh, Ajit Kumar Verma, Kaushik Banerjee, Thongam Ibemcha Chanu, Neeraj Kumar","doi":"10.1002/wer.70017","DOIUrl":"https://doi.org/10.1002/wer.70017","url":null,"abstract":"<p><p>An experiment was conducted under laboratory conditions to examine the effect of sixteen medicinal and aromatic plants (MAPs), namely Aloe barbadensis, Cymbopogen citratus, Bacopa monnieri, Senna sigueana, Plantado ovata, Asparagus racemosses, Phylanthus emblica, Vitex negundo, Cammiphora wightii, Cymbopogon martini, Andrographis paniculate, Ocimum tenuiflorum, Gymnema sylvestre, Centella asiatica, Adhatoda vasica, and Cyamopsis tetragonoloba in the removal of total ammonia-N (TAN) from aquaponics water. The different dried and grounded MAPs were added @ 100 mgl^-1 into individual conical flasks containing 100 ml aquaponics water (spiked with 5 mgl^-1 ammonia) and placed in a shaker. The effectiveness of different MAPs in removing TAN was evaluated at 24 hrs intervals until one of the MAPs achieved a removal rate of over 80%. The study also investigated their potential activity against fish bacterial pathogens viz. Edwardsiella tarda, Escherichia coli, Vibrio parahaemolyticus, Aeromonas hydrophila, and Staphylococcus aureus using the agar well diffusion method. The study indicates a negligible removal of TAN in the first twelve hours for all the MAPs. TAN concentration significantly reduced from 24 hrs for amla-treated water followed by satavari-treated water. Within 96 hrs., amla, satavari, and jalbrahmi removed 88.13 ± 0.81%, 79.52 ± 2.27%, and 77.22 ± 0.70 of TAN respectively. Other MAPs showed little effectiveness in removing ammonia, while cluster beans and ardushi increased the ammonia level in the water. Additionally, the methanol extract of amla exhibited strong antibacterial activities against all tested pathogens especially, against E. tarda. This study suggests the potential application of a MAP-based One-Health approach for mitigating abiotic and biotic stresses in aquaculture. PRACTITIONER POINTS: Evaluated 16 different medicinal and aromatic plants (MAPs) for their ammonia removal activity from aquaponics water. Amla treated water showed the highest ammonia removal followed by Satavaari and Jalbrahmi. Cluster beans and Ardushi treated water resulted in increasing ammonia levels due to their high nitrogen contents. Methanolic extract of amla showed bactericidal activity against fish pathogens Edwardsiella tarda, E. coli, Vibrio parahaemolyticus, A. hydrophila, and S. aureus. Potential applications in developing aquaponics production system of fish with medicinal plants through nutrient cycling and water recycling.</p>","PeriodicalId":23621,"journal":{"name":"Water Environment Research","volume":"97 2","pages":"e70017"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143366098","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}

{"title":"Development of a hydrological model for vegetated swales under different rainfall and swale properties.","authors":"Kebir Emre Saraçoğlu, Cevza Melek Kazezyılmaz-Alhan","doi":"10.1002/wer.70014","DOIUrl":"10.1002/wer.70014","url":null,"abstract":"<p><p>Global warming and climate change affect the number and magnitude of flash floods dramatically, which necessitate effective and innovative solutions. Low Impact Development (LID) has gained importance recently in decreasing the negative impacts of floods in urban areas. LID such as swale, bioretention, infiltration trench, and rain garden emerge as an alternative or complementary solution to the traditional infrastructure stormwater drainage systems. Vegetated swales are one of the most common types of LID used for stormwater runoff control. Although existing software programs have recently integrated modules for LID into their modeling and design, they need improvement for accurate simulations of the hydrological behavior of vegetated swales. Therefore, in this study, a mathematical model was developed to simulate vegetated swale hydrology. The model calculates the overland flow over the watershed area, the overflow over the swale surface, and the drainage flow at the bottom of the swale. A large-scale experimental setup called Rainfall-Watershed-Swale (RWS) was employed in developing the mathematical model, and data obtained from the RWS was used to calibrate the model. Results show that the developed hydrological model accurately simulates the hydrological behavior of swales under different rainfall events and swale properties. PRACTITIONER POINTS: A mathematical model was developed to simulate vegetated swale hydrology. Experimental data from the rainfall-watershed-swale system was employed for model development and calibration. The mathematical model effectively calculates the overflow and drainage flow of a vegetated swale. The model provides a practical tool for the design of vegetated swales.</p>","PeriodicalId":23621,"journal":{"name":"Water Environment Research","volume":"97 2","pages":"e70014"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11794062/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143190433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}