Water science and engineering最新文献

{"title":"Enhanced photocatalytic degradation of dyes using a novel waste toner-based TiO2/Fe2O3@nanographite nanohybrid: A sustainable approach","authors":"Kenneth Mensah ,&nbsp;Hassan Shokry ,&nbsp;Marwa Elkady ,&nbsp;Hamada B. Hawash ,&nbsp;Mahmoud Samy","doi":"10.1016/j.wse.2024.01.005","DOIUrl":"10.1016/j.wse.2024.01.005","url":null,"abstract":"<div><p>This study synthesized a ferric oxide–nanographite (NG) nanocomposite (Fe₂O₃@NG) from waste toner powder through carbonization. Subsequently, a TiO₂/Fe₂O₃@NG nanohybrid was fabricated using the sol–gel technique to improve the photocatalytic degradation of dyes. TiO₂/Fe₂O₃@NG nanocomposites were prepared at TiO₂:Fe₂O₃@NG ratios of 2:1 (Ti:T-21), 1:1 (Ti:T-11), and 1:2 (Ti:T-12). The porosity, morphology, surface chemistry, and chemical interactions between TiO₂, Fe₂O₃, and graphite in the prepared TiO₂/Fe₂O₃@NG nanocomposites were characterized using the Brunauer–Emmett–Teller (BET) method and microscopic and spectroscopic analyses. The TiO₂/Fe₂O₃@NG nanohybrid exhibited a reduced bandgap (2.4–2.9 eV) and enhanced charge carrier separation through charge transfer at the junction of the hetero-structured TiO₂/Fe₂O₃@NG nanohybrid. Preliminary experiments revealed that Ti:T-21 was the most effective photocatalyst for degrading acid blue-25 (AB-25) compared to Ti:T-11, Ti:T-12, sole TiO₂, and Fe₂O₃@NG. This study also investigated the impacts of catalyst dose and initial dye concentration on the AB-25 photocatalytic degradation. Notably, 97% of 5-mg/L AB-25 was removed using 1.25-g/L Ti:T-21 at an unmodified pH of 6.4 within 120 min. Furthermore, Ti:T-21 exhibited remarkable recyclability in its immobilized form, achieving degradation ratios of 74.7%–71.8% over five consecutive runs, compared to removal efficiencies of 85.0%–62.3% in the suspended mode. Trapping experiments identified hydroxyl radicals, holes, and superoxide as the principal reactive radicals. The TiO₂/Fe₂O₃@NG/light system was effective in disintegrating and mineralizing other synthetic dyes such as Congo red, methylene blue, and methyl red, indicating its potential for industrial-scale degradation of authentic dye wastewater. The utilization of waste toner for water treatment is highlighted as a strategy to promote environmental sustainability, foster a circular economy, and contribute to pollution remediation.</p></div>","PeriodicalId":23628,"journal":{"name":"Water science and engineering","volume":"17 3","pages":"Pages 226-235"},"PeriodicalIF":4.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S167423702400022X/pdfft?md5=6da1285a340aaf78de5285f0302f3620&pid=1-s2.0-S167423702400022X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139634379","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}

{"title":"Hydraulic characteristics and flow trajectories under two-sided asymmetric inflow conditions for a deep storage tunnel system","authors":"Wei He ,&nbsp;Chao Yu ,&nbsp;Xiao-dong Yu ,&nbsp;Jian Zhang ,&nbsp;Jose G. Vasconcelos ,&nbsp;Hui Xu ,&nbsp;Shou-ling Chen","doi":"10.1016/j.wse.2023.11.006","DOIUrl":"10.1016/j.wse.2023.11.006","url":null,"abstract":"<div><p>Deep storage tunnels (DSTs) are used in densely urbanized areas to relieve stormwater collection systems, thereby reducing urban floods and runoff pollution, due to their substantial storage capacity. The computation of the hydraulic characteristics and flow trajectories of DSTs under rapid filling scenarios can help to predict sediment deposition and pollutant accumulation associated with the stored runoff, as well as the likelihood of operational problems, such as excessive surging. However, such assessments are complicated by various inflow scenarios encountered in tunnel systems during their operation. In this study, the Suzhou River DST in China is selected as a study case. Particles were tracked, and hydraulic analysis was conducted with scaled model experiments and numerical models. The flow field, particle movement, air‒water phase, and pressure patterns in the DST were simulated under various one- and two-sided inflow scenarios. The results showed that with regards to the design conditions involving two-sided inflows, flow reversals occurred with stepwise increases in the water surface and pressure. In contrast, this phenomenon was not observed under the one-sided inflow scenario. Under the asymmetric two-sided inflow scenarios, water inflows led to particle accumulation near the shaft, reducing the received inflows. However, under the symmetric inflow conditions, particles were concentrated near the middle of the tunnel. Compared to those under the symmetric inflow scenario, asymmetric inflow caused surface wave and entrapped air reductions. This study could provide support for regulation of the inflow of the Suzhou River DST and for prediction of sediment and pollutant accumulation.</p></div>","PeriodicalId":23628,"journal":{"name":"Water science and engineering","volume":"17 3","pages":"Pages 309-318"},"PeriodicalIF":4.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1674237023001175/pdfft?md5=e5fb1166e1e3a54eb1918b8aab874440&pid=1-s2.0-S1674237023001175-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139291443","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}

{"title":"Sulfidation of nano zero-valent iron for enhanced hexavalent chromium removal performance","authors":"Xiu-juan Feng ,&nbsp;Xiao-yi Wang ,&nbsp;Dong-ming Li ,&nbsp;Zhi-han Liu ,&nbsp;Yue-long Yan","doi":"10.1016/j.wse.2023.12.001","DOIUrl":"10.1016/j.wse.2023.12.001","url":null,"abstract":"<div><p>Nano zero-valent iron (nZVI) and sulfidation-modified nZVI (S-nZVI) were synthesized and used to remove hexavalent chromium (Cr(VI)) in wastewater. Characterization of the products showed that the sulfidation process significantly changed the morphology of nZVI, with enhanced crystallinity. The effects of S/Fe ratio, pH value, and reaction temperature on Cr(VI) removal were studied. A S/Fe ratio of 0.5 was the most appropriate parameter, with a removal efficiency of 98% in the condition of pH = 2. The effects of anions (Cl⁻, <span><math><mrow><msubsup><mtext>NO</mtext><mn>3</mn><mo>−</mo></msubsup></mrow></math></span>, <span><math><mrow><msubsup><mtext>CO</mtext><mn>3</mn><mrow><mn>2</mn><mo>−</mo></mrow></msubsup></mrow></math></span>, and <span><math><mrow><msubsup><mtext>SO</mtext><mn>4</mn><mrow><mn>2</mn><mo>−</mo></mrow></msubsup></mrow></math></span>) and cations (Ca²⁺ and Mg²⁺) on the Cr(VI) removal efficiency were investigated, and the relevant mechanisms were discussed. The Cr(VI) removal efficiency of S-nZVI was significantly greater than that of nZVI, mainly owing to the existence of FeS layers that could protect Fe⁰ cores and prompt electron transfer. The aging and cycling experiments showed that S-nZVI could maintain its reactivity when facing the corrosion of water, and showed cycling stability. Thus, S-nZVI is an effective and feasible agent for the remediation of Cr(VI)-contained wastewater.</p></div>","PeriodicalId":23628,"journal":{"name":"Water science and engineering","volume":"17 3","pages":"Pages 249-256"},"PeriodicalIF":4.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1674237023001199/pdfft?md5=5062dc5bd00c2da3d0ad60381fbcd0b1&pid=1-s2.0-S1674237023001199-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138611157","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}

{"title":"Head-mounted display-based augmented reality for water quality visualisation","authors":"Jacky Cao ,&nbsp;Xiaoli Liu ,&nbsp;Xiang Su ,&nbsp;Jonas Eilertsen Hædahl ,&nbsp;Thomas Berg Fjellestad ,&nbsp;Donjete Haziri ,&nbsp;André Hoang-An Vu ,&nbsp;Jari Koskiaho ,&nbsp;Satu Maaria Karjalainen ,&nbsp;Anna-kaisa Ronkanen ,&nbsp;Sasu Tarkoma ,&nbsp;Pan Hui","doi":"10.1016/j.wse.2023.12.002","DOIUrl":"10.1016/j.wse.2023.12.002","url":null,"abstract":"<div><p>Water covers most of the Earth’s surface and is nowhere near a good ecological or recreational state in many areas of the world. Moreover, only a small fraction of the water is potable. As climate change-induced extreme weather events become ever more prevalent, more and more issues arise, such as worsening water quality problems. Therefore, protecting invaluable and useable drinking water is critical. Environmental agencies must continuously check water sources to determine whether they are in a good or healthy state regarding pollutant levels and ecological status. The currently available tools are better suited for stationary laboratory use, and domain specialists lack suitable tools for on-site visualisation and interactive exploration of environmental data. Meanwhile, data collection for laboratory analysis requires substantial time and significant effort. We, therefore, developed an augmented reality system with a Microsoft HoloLens 2 device to explore the visualisation of water quality and status in situ. The developed prototype visualises geo-referenced sensor measurements incorporated into the perspective of the surroundings. Any users interested in water bodies’ conditions can quickly examine and retrieve an overview of water body status using augmented reality and then take necessary steps to address the current situation.</p></div>","PeriodicalId":23628,"journal":{"name":"Water science and engineering","volume":"17 3","pages":"Pages 236-248"},"PeriodicalIF":4.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1674237023001205/pdfft?md5=91077919e309986bc917ca9b436f4f4b&pid=1-s2.0-S1674237023001205-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138618665","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}

{"title":"Green synthesis of silver nanoparticles using aqueous leaf extract of Saussurea obvallata for efficient catalytic reduction of nitrophenol, antioxidant, and antibacterial activity","authors":"P.S.R. Vidya Sagar ,&nbsp;Dharmasoth Ramadevi ,&nbsp;Keloth Basavaiah ,&nbsp;Sathish Mohan Botsa","doi":"10.1016/j.wse.2023.09.004","DOIUrl":"10.1016/j.wse.2023.09.004","url":null,"abstract":"<div><p>Of several noble metal nanoparticles, silver nanoparticles (AgNPs) have attracted special attention due to their distinct properties, such as favorable electrical conductivity, chemical stability, and catalytic and antibacterial activities. Green synthesis of AgNPs using plant extracts containing phytochemical agents has attracted considerable interest. This environmentally friendly approach is more biocompatible and cost-efficient and has the capability of supporting large-scale synthesis. This study developed an eco-friendly method for the preparation of AgNPs using the aqueous leaf extract of <em>Saussurea obvallata</em> as reducing and capping agents. Ultraviolet visible spectroscopy (UV–Vis), Fourier transform infrared spectroscopy (FTIR), Raman, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) analyses were conducted to characterize the synthesized AgNPs. The morphology of AgNPs was found to be spherical with an average crystallite size of 12 nm and a maximum absorbance at 410 nm. 10 mg of AgNPs had potential to reduce 4-nitrophenol to 4-aminophenol in 16 min and exhibited strong biological activities against the Gram-negative bacteria <em>Escherichia coli</em> (12 mm) and Gram-positive bacteria <em>Enterococcus faecalis</em> (13 mm). The antioxidant activity of the synthesized AgNPs was investigated against the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging and exhibited up to 61.21% ± 0.02% at an AgNPs concentration of 500 μg/mL.</p></div>","PeriodicalId":23628,"journal":{"name":"Water science and engineering","volume":"17 3","pages":"Pages 274-282"},"PeriodicalIF":4.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1674237023000881/pdfft?md5=0fa350e2b7c0dc10dd24b8c3602d54c8&pid=1-s2.0-S1674237023000881-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135347796","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}

{"title":"Seasonal response of nitrogen exchange fluxes to crab disturbance at sediment–water interface in coastal tidal wetlands","authors":"Guo-fen Hua ,&nbsp;Shang-qing Liu ,&nbsp;Xiang-dong Liu ,&nbsp;Jin-li Li ,&nbsp;Yue Fang ,&nbsp;Wen-ting Xie ,&nbsp;Xiang Xu","doi":"10.1016/j.wse.2023.11.007","DOIUrl":"10.1016/j.wse.2023.11.007","url":null,"abstract":"<div><p>Coastal wetlands are hotspots for nitrogen (N) cycling, and crab burrowing is known to transform N in intertidal marsh soils. However, the underlying mechanisms remain unclear. This study conducted field experiments and used indoor control test devices to investigate the seasonal response of nitrogen to crab disturbance at the sediment–water interface in coastal tidal flat wetlands. The results showed that crab disturbance exhibited significant seasonality with large seasonal differences in cave density and depth. Due to crab disturbance, nitrogen fluxes at the sediment–water interface were much greater in the box with crabs than in the box without crabs. In summer, <span><math><msubsup><mtext>NH</mtext><mn>4</mn><mo>+</mo></msubsup><mo>-</mo><mi>N</mi></math></span> showed a positive flux from the sediment to the overlying water, but <span><math><msubsup><mtext>NO</mtext><mn>2</mn><mo>−</mo></msubsup><mtext>-</mtext><mi>N</mi></math></span> and <span><math><msubsup><mtext>NO</mtext><mn>3</mn><mo>−</mo></msubsup><mtext>-</mtext><mi>N</mi></math></span> showed positive fluxes from the sediment to the overlying water only in early stages. In winter, <span><math><msubsup><mtext>NH</mtext><mn>4</mn><mo>+</mo></msubsup><mtext>-</mtext><mi>N</mi></math></span> showed a positive flux from the sediment to the overlying water, but <span><math><msubsup><mtext>NO</mtext><mn>2</mn><mo>−</mo></msubsup><mtext>-</mtext><mi>N</mi></math></span> and <span><math><msubsup><mtext>NO</mtext><mn>3</mn><mo>−</mo></msubsup><mtext>-</mtext><mi>N</mi></math></span> both exhibited positive and negative fluxes. These results indicated that the presence of crab burrows can cause the aerobic layer to move downward by approximately 8–15 cm in summer and directly promote nitrification at the sediment surface.</p></div>","PeriodicalId":23628,"journal":{"name":"Water science and engineering","volume":"17 2","pages":"Pages 129-138"},"PeriodicalIF":4.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1674237023001187/pdfft?md5=ecffc1324b2de1ec9722880f4e7be518&pid=1-s2.0-S1674237023001187-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138614138","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}

{"title":"Synthesis of plant-based biogenic jarosite nanoparticles using Azadirachta indica and Eucalyptus gunni leaf extracts and its application in Fenton degradation of dicamba","authors":"Shivaswamy Bhaskar ,&nbsp;Basavaraju Manu ,&nbsp;Marikunte Yanjarappa Sreenivasa ,&nbsp;Arlapadavu Manoj","doi":"10.1016/j.wse.2023.08.003","DOIUrl":"10.1016/j.wse.2023.08.003","url":null,"abstract":"<div><p>Bio-jarosite, an iron mineral synthesized biologically using bacteria, is a substitute for iron catalysts in the Fenton oxidation of organic pollutants. Iron nanocatalysts have been widely used as Fenton catalysts because they have a larger surface area than ordinary catalysts, are highly recyclable, and can be treated efficiently. This study aimed to explore the catalytic properties of bio-jarosite iron nanoparticles synthesized with green methods using two distinct plant species: <em>Azadirachta indica</em> and <em>Eucalyptus gunni</em>. The focus was on the degradation of dicamba via Fenton oxidation. The synthesized nanoparticles exhibited different particle size, shape, surface area, and chemical composition characteristics. Both particles were effective in removing dicamba, with removal efficiencies of 96.8% for <em>A. indica</em> bio-jarosite iron nanoparticles (ABFeNPs) and 93.0% for <em>E. gunni</em> bio-jarosite iron nanoparticles (EBFeNPs) within 120 min of treatment. Increasing the catalyst dosage by 0.1 g/L resulted in 7.6% and 43.0% increases in the dicamba removal efficiency for EBFeNPs and ABFeNPs with rate constants of 0.025 min⁻¹ and 0.023 min⁻¹, respectively, confirming their catalytic roles. Additionally, the high efficiency of both catalysts was demonstrated through five consecutive cycles of linear pseudo-first-order Fenton oxidation reactions.</p></div>","PeriodicalId":23628,"journal":{"name":"Water science and engineering","volume":"17 2","pages":"Pages 157-165"},"PeriodicalIF":4.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1674237023000819/pdfft?md5=6d35420898dd90d77c1c472822549f82&pid=1-s2.0-S1674237023000819-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47744353","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}

{"title":"Sacrificial piles as a countermeasure against local scour around underwater pipelines","authors":"Forough Raeisi ,&nbsp;Seyed Mohammad Ali Zomorodian ,&nbsp;Masih Zolghadr ,&nbsp;Hazi Mohammad Azamathulla","doi":"10.1016/j.wse.2023.08.002","DOIUrl":"10.1016/j.wse.2023.08.002","url":null,"abstract":"<div><p>Local scour around pipelines crossing rivers or in marine environments is a significant concern. It can lead to failure of the pipelines resulting in environmental side effects and economic losses. This study developed an experimental method to reduce local scour around pipelines with a steady flow of clear water by installing cylindrical and cubical sacrificial piles. Three sizes of sacrificial piles were examined in a linear arrangement. Sacrificial piles were installed on the upstream side of the pipeline at three distances. Maximum scour depth reduction rates below the pipeline were computed. The results showed that sacrificial piles could protect a pipeline from local scour. A portion of scoured sediment around the sacrificial piles was deposited beneath the pipeline. This sediment accumulation reduced the scour depth beneath the pipeline. Analysis of the experimental results demonstrated that the size of piles (<em>d</em>), the spacing between piles, and the distance between the pipe and piles (<em>X</em>_p) were the variables that reduced the maximum scour beneath the pipeline with a diameter of <em>D</em>. For the piles with <em>d</em> = 0.40<em>D</em> and 0.64<em>D</em>, <em>X</em>_p = 40<em>D</em> was the optimal distance to install a group of piles, and cubical piles could mitigate scour more effectively than cylindrical piles under similar conditions. For the piles with <em>d</em> = <em>D</em>, the greatest reduction in scour depth was achieved at <em>X</em>_p = 50<em>D</em> with any desired spacings between piles, and cylindrical piles in this dimension could protect the pipeline against scour more effectively than cubical piles.</p></div>","PeriodicalId":23628,"journal":{"name":"Water science and engineering","volume":"17 2","pages":"Pages 187-196"},"PeriodicalIF":4.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1674237023000790/pdfft?md5=59bbf946d834fc316bf6fdb371319c20&pid=1-s2.0-S1674237023000790-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44522502","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}

{"title":"Efficient removal of U(VI) from wastewater by a sponge-like 3D porous architecture with hybrid electrospun nanofibers","authors":"Lin Hu ,&nbsp;Lin Chen ,&nbsp;Xian-kun Wu ,&nbsp;Rui Luo ,&nbsp;Rong-guan Lv ,&nbsp;Zheng-hao Fei ,&nbsp;Feng Yang","doi":"10.1016/j.wse.2023.11.001","DOIUrl":"10.1016/j.wse.2023.11.001","url":null,"abstract":"<div><p>Removal of uranium(VI) from nuclear wastewater is urgent due to the global nuclear energy exploitation. This study synthesized novel sponge-like 3D porous materials for enhanced uranium adsorption by combining electrospinning and fibrous freeze-shaping techniques. The materials possessed an organic–inorganic hybrid architecture based on the electrospun fibers of polyacrylonitrile (PAN) and SiO₂. As a supporting material, the surface of fibrous SiO₂ could be further functionalized by cyano groups via (3-cyanopropyl)triethoxysilane. All the cyano groups were turned into amidoxime (AO) groups to obtain a amidoxime-functionalized sponge (PAO/SiO₂-AO) through the subsequent amidoximation process. The proposed sponge exhibited enhanced uranium adsorption performance with a high removal capacity of 367.12 mg/g, a large adsorption coefficient of 4.0 × 10⁴ mL/g, and a high removal efficiency of 97.59%. The <span><math><mrow><msubsup><mtext>UO</mtext><mn>2</mn><mrow><mn>2</mn><mo>+</mo></mrow></msubsup></mrow></math></span> adsorption kinetics perfectly conformed to the pseudo-second-order reaction. The sorbent also exhibited an excellent selectivity for <span><math><mrow><msubsup><mtext>UO</mtext><mn>2</mn><mrow><mn>2</mn><mo>+</mo></mrow></msubsup></mrow></math></span> with other interfering metal ions.</p></div>","PeriodicalId":23628,"journal":{"name":"Water science and engineering","volume":"17 2","pages":"Pages 150-156"},"PeriodicalIF":4.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1674237023001126/pdfft?md5=c350de37006f4cd7e95054f7660984b4&pid=1-s2.0-S1674237023001126-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139301763","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}

{"title":"Spatial diversion and coordination of flood water for an urban flood control project in Suzhou, China","authors":"Yu Xu ,&nbsp;You-peng Xu ,&nbsp;Qiang Wang ,&nbsp;Yue-feng Wang ,&nbsp;Chao Gao","doi":"10.1016/j.wse.2023.11.002","DOIUrl":"10.1016/j.wse.2023.11.002","url":null,"abstract":"<div><p>Suzhou City, located in the Yangtze River Delta in China, is prone to flooding due to a complex combination of natural factors, including its monsoon climate, low elevation, and tidally influenced position, as well as intensive human activities. The Large Encirclement Flood Control Project (LEFCP) was launched to cope with serious floods in the urban area. This project changed the spatiotemporal pattern of flood processes and caused spatial diversion of floods from the urban area to the outskirts of the city. Therefore, this study developed a distributed flood simulation model in order to understand this transition of flood processes. The results revealed that the LEFCP effectively protected the urban areas from floods, but the present scheduling schemes resulted in the spatial diversion of floods to the outskirts of the city. With rainstorm frequencies of 10.0% to 0.5%, the water level differences between two representative water level stations (Miduqiao (MDQ) and Fengqiao (FQ)) located inside and outside the LEFCP area, ranged from 0.75 m to 0.24 m and from 1.80 m to 1.58 m, respectively. In addition, the flood safety margin at MDQ and the duration with the water level exceeding the warning water level at FQ ranged from 0.95 m to 0.43 m and from 4 h to 22 h, respectively. Rational scheduling schemes for the hydraulic facilities of the LEFCP in extreme precipitation cases were developed according to flood simulations under seven scheduling scenarios. This helps to regulate the spatial flood diversion caused by the LEFCP during extreme precipitation.</p></div>","PeriodicalId":23628,"journal":{"name":"Water science and engineering","volume":"17 2","pages":"Pages 108-117"},"PeriodicalIF":4.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1674237023001138/pdfft?md5=3899ef2a3069f5954b8645c1802d3d61&pid=1-s2.0-S1674237023001138-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135664590","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}