Water Environment Research最新文献

{"title":"Physiological and metabolic responses of Limnoperna fortunei to KMnO₄ and NaClO exposure.","authors":"Qian-Bin Wang, Jian-Hua Zhou, Rui-Jian Zhang, Ye-Qin Xu, Yong Hu, Hao-Tao Dong, Zhi-Li Du, Ying-Shi Liu, Chong Lin, Zong-Jia Zhang","doi":"10.1002/wer.70082","DOIUrl":"https://doi.org/10.1002/wer.70082","url":null,"abstract":"<p><p>Biofouling of Limnoperna fortunei causes increment on water conveyance energy and deteriorates concrete during freshwater transportation process. Apart from application of chemical oxidants such as KMnO₄ and NaClO, few other strategies can control L. fortunei. However, the cellular and metabolic responses of L. fortunei during KMnO₄ and NaClO exposure are still not fully understood. This work aimed to illustrate the physiological and metabolic status of L. fortunei exposed to KMnO₄ and NaClO at concentration of 1, 2, 4, and 8 mg l^-1. The mortality rate, amount of acid and neutral mucous secretions, and the activities of antioxidant enzymes were determined after KMnO₄ and NaClO exposure. The activities of biotransformation and detoxification enzymes, including as superoxide dismutase, catalase, glutathione peroxidase, and acetylcholinesterase, increased in response to NaClO exposure as an adaptive response. In comparison, KMnO₄ exposure showed severer lethal effect, especially at concentrations higher than 4 mg l^-1. The increment of lipid peroxides followed the raise of KMnO₄ concentrations, indicating the toxic effect from KMnO₄. The results of liquid chromatography-mass spectrometry (LC-MS)-based metabolomic revealed that KMnO₄ mainly affected the purine and energy metabolism pathway and disrupted osmoregulatory processes, whereas NaClO mainly affected amino acid metabolism. These findings provided insight on controlling the biofouling of L. fortunei. PRACTITIONER POINTS: KMnO₄ was effective to inactivate L. fortunei rather than NaClO. Antioxidant system of L. fortunei was valid to counteract the oxidative stress from NaClO exposure, while paralyzation during KMnO₄ exposure. Amino acid metabolism was involved in polishing immune responses and detoxification during NaClO exposure. Disordered purine and energy metabolism pathway and disrupted osmoregulatory processes were induced by KMnO₄. Mitigating L. fortunei biofouling reduces raw water energy demands and concrete degradation risks.</p>","PeriodicalId":23621,"journal":{"name":"Water Environment Research","volume":"97 6","pages":"e70082"},"PeriodicalIF":2.5,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144249860","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":"Enhancement of anaerobic co-digestion of waste-activated sludge and agriculture waste by hybrid process of thermo-alkaline hydrolysis and hydrodynamic cavitation.","authors":"Rabab M Wagdy, Ahmed M Aboulfotoh, Khaled W Soliman","doi":"10.1002/wer.70079","DOIUrl":"https://doi.org/10.1002/wer.70079","url":null,"abstract":"<p><p>Improving sludge solubilization and biogas generation through thermal, alkaline, and hydrodynamic pre-treatment methods is considered one of the most important research points in the anaerobic digester field. Results revealed that the hybrid method is better than other methods as it achieved 0.64 (CODs/energy consumed) ratio and the gas production rate ranged between (23.34 L/kg COD.d) at RT 30 days. While thermo-alkaline mixed with AW (1: 1 by mass) is very effective in the digesters by reusing agricultural waste into useful biogas, reached at RT 30-day high gas rates (11.55 L/kg COD.d) and cumulative gas volume about (0.43 L/g of COD added), even though CO₂ emissions initially limited the production. Compared to traditional digesters, pretreatment methods significantly decreased CO₂ emissions early on. Additionally, heating agricultural waste with sludge above 100°C facilitated a reduction in sludge volume, as cellulose components in agricultural residues, particularly from sugarcane, absorb water from the sludge-this factor is crucial for minimizing the capital costs of drying beds. Overall, alkaline pretreatment improved biodegradability overall and shortened digester retention times. PRACTITIONER POINTS: Hybrid method the best method 0.64 CODs/energy consumed ratio is achieved, 98% CODs' removal percent, Thermo-alkaline with AW is very effective, gas rates 0.46 Lit/day, cumulative volume 30 Lit at 30-day Thermo-alkaline with AW is an essential cheap solution for solid waste management, reducing air pollution impacts from firming the AW Pretreatment helps lowering the (CO₂ gases) released in the first 10 days compared to conventional AD units without pretreatment, Heating AW with the sludge higher than 100°C leads to adsorb the water content in the mixture.</p>","PeriodicalId":23621,"journal":{"name":"Water Environment Research","volume":"97 6","pages":"e70079"},"PeriodicalIF":2.5,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144188064","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":"Sludge removal frequency influences heavy metal accumulation, water quality, and growth in Nile tilapia (Oreochromis niloticus) biofloc systems.","authors":"Syed Sikandar Habib, Madeeha Arshad, Saima Majeed, Mujeeb Ullah, Javed Ahmed Ujan, Saira Naz, Mohamed Mohany","doi":"10.1002/wer.70081","DOIUrl":"https://doi.org/10.1002/wer.70081","url":null,"abstract":"<p><p>Heavy metals (HMs) are one of the emerging micropollutants, which have been found a significant toxicant to the fish fauna; therefore, the current study aimed to examine HMs including Cd, Cr, Pb, and Cu concentrations in sludge and their accumulation in Oreochromis niloticus tissues along with growth and water quality in Biofloc Technology (BFT). Tilapia, initially weighing 0.40 ± 0.15 g, were divided into three groups (G1, G2, and G3) with three replicates each. Sludge was removed weekly for G1, biweekly for G2, and monthly for G3 over 90 days. Water quality parameters were monitored daily, and (HMs)in sludge and fish tissues were analyzed. One-way ANOVA with multiple comparisons was used to compare the results among groups. Results showed that sludge removal frequency significantly (p < 0.05) affected water quality. G3 had higher ammonia, nitrate, and nitrite levels, and a slightly acidic pH. G1 had higher dissolved oxygen (6.72 mg/l) compared to G3 (5.32 mg/l) and better growth performance with a lower feed conversion ratio (FCR) of 1.44 versus 1.67 for G3. The HM analysis showed that G3 had higher metal concentrations in both fish tissues and sludge, with a strong correlation between metal levels in sludge and fish tissues. The health index (HI) values confirmed that fish from all groups were safe for human consumption. The study concludes that regular sludge management is crucial for optimizing BFT production and safety; therefore, G1 has optimum growth and water quality with less HM accumulation. PRACTITIONER POINTS: Study examines Cd, Cr, Pb, and Cu accumulation in Nile tilapia tissues and sludge under varying sludge removal frequencies. Weekly sludge removal improves water quality, dissolved oxygen, and fish growth, with better FCR. Monthly sludge removal shows higher ammonia, nitrate, nitrite, acidic pH, and metal concentrations in sludge and fish tissues. Strong correlation found between sludge metal levels and fish tissue accumulation. Findings emphasize regular sludge management for enhanced BFT production, safety, and reduced heavy metal bioaccumulation.</p>","PeriodicalId":23621,"journal":{"name":"Water Environment Research","volume":"97 6","pages":"e70081"},"PeriodicalIF":2.5,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144188066","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":"Storm events influence the transport of macroplastics in urban streams.","authors":"Bailey A Schwenk, Elizabeth M Kazmierczak, Fritz Petersen, Jacob Haney, Xia Zhu, Shan Zuidema, Emily K Lever, Richard B Lammers, Wilfred M Wollheim, Chelsea M Rochman, Timothy J Hoellein","doi":"10.1002/wer.70083","DOIUrl":"10.1002/wer.70083","url":null,"abstract":"<p><p>Plastic litter is a globally pervasive pollutant. Storms are likely key drivers of plastic transport to oceans, but plastic transport during rising and falling limbs of storm hydrographs is rarely measured. Measurements of plastic movement throughout individual storms will improve watershed models of plastic dynamics. We used cameras to quantify macroplastic movement (i.e., particles > 5 mm) in rivers before, during, and after individual storms (N = 18) at 10 sites within three North American watersheds. Most storms showed no difference in macroplastic transport between rising and falling hydrograph limbs or evidence of hysteresis (transport rate range = 0-236 items/30 min). Total macroplastic exported during storm events was positively related to storm magnitude and was greatest at more urban sites. Thus, macroplastic transport during storms was driven by storm size and land use. The quantitative relationships between macroplastic movement and hydrology will improve discharge-weighted calculations of macroplastic transport which can benefit modeling, monitoring, and mitigation efforts. PRACTITIONER POINTS: Macroplastic particles (i.e, > 5 mm) are both retained in urban streams (e.g., in debris dams), and move downstream during baseflow and stormflow conditions Storm flows are key periods of macroplastic transport: transport rates are higher on both rising and falling limbs of storm hydrographs relative to baseflow. The amount of macroplastics moving during storm flows is positively related to storm intensity. The predictive relationships generated between storm flow and macroplastic transport will improve estimates of annual export, and policies for macroplastic pollution reduction.</p>","PeriodicalId":23621,"journal":{"name":"Water Environment Research","volume":"97 6","pages":"e70083"},"PeriodicalIF":2.5,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12127040/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144200155","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":"Preparation and Dewatering Performance Evaluation of CPAD Sludge Conditioner: From Small Scale to Pilot Scale.","authors":"Yongjun Sun, Yuhan Ji, Rui Wang, Kun Wu, Wenquan Sun","doi":"10.1002/wer.70123","DOIUrl":"https://doi.org/10.1002/wer.70123","url":null,"abstract":"<p><p>This study aimed to develop a novel sludge conditioner (CPAD) based on carboxymethyl chitosan (CTS) to address the low efficiency of municipal sludge dewatering. CPAD was prepared by grafting acrylamide (AM) and dimethyldiallylammonium chloride (DADMAC) onto CTS, resulting in a honeycomb-like porous structure, and its flocculation and dewatering performance were validated through laboratory and pilot-scale tests. The novelty of CPAD lies in its combination of the environmental friendliness of natural polymers and the high efficiency of synthetic polymers, significantly reducing the specific resistance to filtration (SRF) and moisture content of sludge. Experimental results showed that at a pH of 6 and a CPAD dosage of 3 kg/t dry sludge (DS), the SRF of the sludge decreased by 90.15%, and the moisture content decreased by 11.85%. Under pilot-scale conditions, with a filtration pressure of 1.2 MPa and a filtration time of 90 min, CPAD reduced the sludge moisture content to 59.3%. Additionally, CPAD effectively neutralized the sludge's electronegativity, reduced electrostatic repulsion between particles, promoted sludge particle bridging and aggregation, and lowered the chemical oxygen demand (COD) and total organic carbon (TOC) of the filtrate as well as the sludge viscosity. This study provides new insights and technical support for developing low-cost, efficient, and environmentally friendly sludge conditioners. SUMMARY: CPAD promotes sludge particle aggregation and reduces sludge viscosity. The mud cake produced by CPAD were environmentally friendly. Sludge conditioner CPAD is nontoxic and harmless and does not cause secondary pollution. CPAD can effectively reduce the moisture content of sludge cake.</p>","PeriodicalId":23621,"journal":{"name":"Water Environment Research","volume":"97 6","pages":"e70123"},"PeriodicalIF":2.5,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144327012","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":"Good Ethical and Laboratory Practices for Wastewater Surveillance.","authors":"Rachel Hamant, Yuzhu Mao, Chunfu Liu, Alba Torrents, Birthe Kjellerup","doi":"10.1002/wer.70112","DOIUrl":"10.1002/wer.70112","url":null,"abstract":"<p><p>Wastewater Surveillance (WBS) is an approach for disease surveillance involving the screening of wastewater for RNA/DNA originating from infectious agents. In recent years, WBS has expanded to include analytes from pharmaceuticals (such as SSRI) or illicit drugs, referred to as \"High-risk Substances\" (HRS). The University of Maryland enacted in partnership with a local county public health department and water utility, a surveillance program to assess wastewater twice weekly for the presence of SARS-CoV-2 and other viral targets. WBS can provide rapid data showing where the location of clustered outbreaks may be occurring (specifically. The county public health department also requested that screening of high-risk substances (fentanyl, ketamine, Narcan, heroine, etc.) to be included in WBS, thus expanding the purview of the initial surveillance project focusing solely biological agents. A concern for any surveillance program is adhering to ethical standards, regulations, and protocols. In WBS, there is no single standardized \"list of rules\" to guide researchers in determining risk of privacy or community stigmatization. In an effort to counter the variation in WBS as it pertains to ethical standards, we propose utilizing an ethical scoring framework tailored for WBS. This framework includes a scoresheet that can assist scientists determine the privacy and ethical risks associated with their study by introducing a quantifiable process to assess ethical compliance. Furthermore, we include a flow map outlining standard laboratory practices under the lens of how each step assists in maintaining sample fidelity, thus increasing the robustness and reliability of the data generated. SUMMARY: It is important to balance ethical standards, public health and research strategies. Application of the tools listed in this document will ensure this balance. Application of the developed ethical guidelines (Score sheet) is a practical approach. It is important to integrate vigorous data management practices. Utilization of a robust and holistic structure of the wastewater surveillance program will ensure successful outcomes.</p>","PeriodicalId":23621,"journal":{"name":"Water Environment Research","volume":"97 6","pages":"e70112"},"PeriodicalIF":2.5,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12178841/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144333998","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":"Comparative analysis of organic carbon forms and their availability in diverse wetland ecosystems of Nantong, China.","authors":"Miatta Jarnda Tisdell, Yuhong Liu, Jiayuan Liu, Age Som Massou, Flomo M Beyan, Ifeanyi Chidozie Oli, Kermue Vasco Jarnda","doi":"10.1002/wer.70087","DOIUrl":"https://doi.org/10.1002/wer.70087","url":null,"abstract":"<p><p>Wetlands are vital ecosystems for global carbon cycling and storage, acting as significant carbon reservoirs that surpass many other ecosystems in their capacity to sequester carbon. This study investigates the availability and distribution of various forms of organic carbon across different wetland types in Nantong, China, including coastal, freshwater riverine, saltwater riverine, and inland lake wetlands. Soil samples were collected and analyzed for soil organic carbon (SOC), Dissolved Organic Carbon (DOC), Particulate Organic Carbon (POC), Mineral-Associated Organic Carbon (MAOC), And Easily Oxidizable Organic Carbon (EOC). The results reveal that coastal wetlands exhibit the highest mean SOC (19.8974 mg/g) and DOC (0.2585 mg/g) concentrations, indicating their significant role in carbon sequestration. Meanwhile, freshwater riverine wetlands have the highest mean POC (8.3611 mg/g), highlighting their importance in particulate organic carbon storage. Saltwater riverine wetlands demonstrate significant carbon sequestration potential, with the highest total carbon content (122.53 mg/g). Correlation analysis shows that the levels of ammonia are positively related to SOC, DOC, MAOC, and EOC. This means that the ammonia levels encourage microbes to work harder and break down organic matter faster. Conversely, nitrite levels negatively impact SOC, DOC, and MAOC. These findings underscore the importance of wetland type and environmental conditions in determining carbon storage and turnover. The study provides critical insights for wetland conservation and management strategies aimed at mitigating climate change and preserving biodiversity. PRACTITIONER POINTS: Coastal wetlands show the highest mean SOC and DOC, indicating significant carbon sequestration potential and nutrient availability. Freshwater riverine wetlands have the highest POC levels, highlighting their role in particulate organic matter accumulation. Saltwater riverine wetlands demonstrate substantial total carbon content, showing resilience in saline conditions. Ammonia positively influences SOC, DOC, MAOC, and EOC, enhancing microbial activity and organic matter decomposition. Variability in carbon content across wetland types emphasizes the need for tailored conservation and management strategies.</p>","PeriodicalId":23621,"journal":{"name":"Water Environment Research","volume":"97 6","pages":"e70087"},"PeriodicalIF":2.5,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144188063","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":"Diversity and biotechnological potential of cultivable alkaline aquatic microbiomes.","authors":"Milica Ciric, Jasmina Nikodinovic-Runic, Clémence Budin, Tjalf de Boer, Vladimir Šaraba","doi":"10.1002/wer.70075","DOIUrl":"https://doi.org/10.1002/wer.70075","url":null,"abstract":"<p><p>Water samples, originating from the mildly alkaline (pH 7.4) brackish groundwater spring (MAGW), moderately alkaline (pH 8.1) hypersaline sea (SW), and fresh lake (LW), as well as from the hyperalkaline (pH 11.7) fresh groundwater well (HAGW), were selected to examine the diversity of cultivable bacteria and to assess their plastolytic and lignocellulolytic potential. The most represented aquatic genera after cultivation were Aeromonas in LW and MAGW sample, Bacillus in HAGW sample, and Vibrio in SW sample. Over 60% of 128 screened aquatic isolates had the ability to grow on plastic substrates Impranil® DLN-SD (SD) and DL 2077, polycaprolactone diol, and bis(2-hydroxyethyl) terephthalate as sole carbon source, while 8.6% of screened isolates showed signs of polyurethane degradation. Majority (>90%) of all screened isolates grew on lignocellulosic substrates carboxymethyl cellulose, xylan, and lignin, respectively, while 12.5% of screened isolates, all originating from the examined groundwater samples, demonstrated complete degradation of cellulose. Potential applications of polyurethane- and cellulose-degrading microbial isolates for the management and valorization of plastic and biomass waste in aquatic environments should be further explored. PRACTITIONER POINTS: Vibrio, Aeromonas, and Bacillus were the most represented genera after seawater, lakewater, and groundwater cultivation. Over 60% of all screened aquatic isolates grew on four tested plastic substrates, with 8.6% showing signs of polyurethane degradation. Majority of screened aquatic isolates grew on three tested lignocellulosic substrates, with 12.5% completely degrading carboxymethyl cellulose. Biotechnological potential of polyurethane- and cellulose-degrading isolates for plastic and biomass waste management in aquatic environments should be further explored.</p>","PeriodicalId":23621,"journal":{"name":"Water Environment Research","volume":"97 6","pages":"e70075"},"PeriodicalIF":2.5,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144182091","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":"Harnessing synergistic two-step adsorption of silica/calcium chloride (CaCl₂) hybrid composites for ammonium removal from aquarium water.","authors":"Sarah Farrukh, Xianfeng Fan, Syed Shujaat Karim, Zhibin Yu, Humais Roafi","doi":"10.1002/wer.70080","DOIUrl":"10.1002/wer.70080","url":null,"abstract":"<p><p>Ammonium ions, prevalent water contaminants, can become hazardous at high concentrations. To mitigate this risk, various adsorbents have been developed, yet the kinetics of their adsorption processes remain under investigation. In this study, we present the fabrication and comprehensive analysis of pure silica and silica/calcium chloride (CaCl₂) composites. These materials were characterized using advanced techniques such as scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), and differential thermal analysis (DTA). Additionally, pore and salt ratio analyses were conducted using BET and DFT methods. Ammonium ion adsorption efficiency was evaluated through ultraviolet-visible spectroscopy (UV/Vis). The results show that with an increase in the concentration of CaCl₂, more adsorption was observed. However, the kinetic analysis revealed that the experimental results followed the pseudo-second-order model and values of k₂ show that mass transfer was slow with a 1% CaCl₂-based silica composite as compared to other samples. The intramolecular model predicted that the adsorption of ammonium ions was a two-step process, and the Elovich model fits reasonably, highlighting the presence of physicochemical interactions between ammonium ions and CaCl₂-silica composites. Furthermore, these composites proved highly effective in treating aquarium water. The treatment process increased the pH from 6.19 to 6.74 and successfully removed up to 43% of ammonium ions from the aquarium water. These findings highlight the potential of silica/CaCl₂ composites as a viable adsorbent for ammonium removal for aquarium water purification, offering a significant advancement in maintaining a safe environment for aquatic life. PRACTITIONER POINTS: State-of-the-art characterization techniques confirmed successful fabrication of Silica/Calcium Chloride (CaCl₂) Hybrid Composites. The fabricated composites showed better ammonium ion adsorption, improving the effectiveness of water purification. Kinetic studies revealed a pseudo-second-order model, with a slower mass transfer rate in low CaCl₂ concentration composites. The intramolecular model indicates a two-step adsorption mechanism, while the Elovich model validates physicochemical interactions. Optimal composite improves the aquarium water pH from 6.19 to 7.08 by the removal ammonium ions.</p>","PeriodicalId":23621,"journal":{"name":"Water Environment Research","volume":"97 6","pages":"e70080"},"PeriodicalIF":2.5,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12127048/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144200153","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":"Correction to \"Concentrations and characteristics of polycyclic aromatic hydrocarbons (PAHs), phenols, and chlorobenzenes in deep seawater near South China Sea\".","authors":"","doi":"10.1002/wer.70101","DOIUrl":"https://doi.org/10.1002/wer.70101","url":null,"abstract":"","PeriodicalId":23621,"journal":{"name":"Water Environment Research","volume":"97 6","pages":"e70101"},"PeriodicalIF":2.5,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144286615","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}