Water Practice & Technology最新文献_第8页

Study on temporal and spatial variations of excessive dissolved phosphorus in the Fuquan section of the Chong-an River 崇安河福泉段溶解磷超标的时空变化研究

Water Practice & Technology Pub Date : 2024-04-15 DOI: 10.2166/wpt.2024.088

Xiaobin Lu

{"title":"Study on temporal and spatial variations of excessive dissolved phosphorus in the Fuquan section of the Chong-an River","authors":"Xiaobin Lu","doi":"10.2166/wpt.2024.088","DOIUrl":"https://doi.org/10.2166/wpt.2024.088","url":null,"abstract":"\u0000 \u0000 There were many phosphorus chemical enterprises and phosphogypsum slag fields in the Fuquan section of the Chong-an River in the Guizhou Province of China; therefore, the dissolved phosphorus in the Fengshanqiaobian water quality monitoring section of the area has exceeded 0.2 mg/L for a long time. This study analyzed the monitoring data of dissolved phosphorus, fluoride, nitrate–nitrogen, and chemical oxygen demand in the main stream and key tributaries of the Fuquan section of the Chong-an River from 2015 to 2021, in which the main exceeding factor was dissolved phosphorus of more than 0.2 mg/L; determined the variation law of phosphorus pollution in the water body of the Fuquan section of the Chong-an River, in which the exceedance of phosphorus was mainly concentrated in May of flood season and in January and March of the drought season; evaluated the sources of phosphorus pollution, in which the main pollution sources were from phosphogypsum slag field leakage, phosphorus chemical industry plant leakage, agricultural nonpoint source pollution; and presented measures to reduce phosphorus pollutants in rivers, such as strengthening phosphogypsum slag field and phosphorus chemical enterprise seepage prevention measures, and reducing the amount of phosphate fertilizer application.","PeriodicalId":104096,"journal":{"name":"Water Practice & Technology","volume":"42 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140698972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A cloud-based infrastructure to deploy supervisory forecast models for predictive coagulant dosing control 基于云的基础设施，用于部署预测性混凝剂剂量控制的监督预测模型

Water Practice & Technology Pub Date : 2024-04-10 DOI: 10.2166/wpt.2024.091

A. Nair, Viktoria Yavorska, A. Hykkerud, Harsha Ratnaweera

{"title":"A cloud-based infrastructure to deploy supervisory forecast models for predictive coagulant dosing control","authors":"A. Nair, Viktoria Yavorska, A. Hykkerud, Harsha Ratnaweera","doi":"10.2166/wpt.2024.091","DOIUrl":"https://doi.org/10.2166/wpt.2024.091","url":null,"abstract":"\u0000 Advanced optimal dosing control based on multiple online sensor data is operational in several treatment facilities in Norway. The benefits of the dosing control system in maintaining stable phosphate/solids removal and saving coagulant usage are documented in the literature. The dosing algorithm is currently implemented in a programmable logic controller (PLC) connected to the treatment plant's Supervisory Control and Data Acquisition System (SCADA) system. The PLC receives online sensor data from the plant's SCADA, calculates the optimal dosing values, and transmits optimal dosage values back to the SCADA system. The dosing algorithm is frequently updated to keep in sync with the process and equipment upgrades of the treatment plant and advances in control algorithm schemes. The upgrades include new regulatory feedback loops structural changes to the dose equation, and the addition of conditional setpoints. Each maintenance and upgrade routine entails operational downtime where the dosing algorithm is set to a sub-optimal flow-proportional dose. This paper presents a non-intrusive Internet of Things (IoT) infrastructure to implement a predictive/forecast component to an existing dosing control algorithm. The benefits of the new cloud-based system in improving nutrient removal, increasing operational flexibility, and reducing maintenance downtime are presented in this work.","PeriodicalId":104096,"journal":{"name":"Water Practice & Technology","volume":"142 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140719928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reducing costs of Giardia spp. cyst enumeration using machine learning-based systems 利用基于机器学习的系统降低贾第虫属囊肿计数成本

Water Practice & Technology Pub Date : 2024-04-09 DOI: 10.2166/wpt.2024.087

V. L. Belini, N. D. M. N. Fava, L. P. Sabogal-Paz

{"title":"Reducing costs of Giardia spp. cyst enumeration using machine learning-based systems","authors":"V. L. Belini, N. D. M. N. Fava, L. P. Sabogal-Paz","doi":"10.2166/wpt.2024.087","DOIUrl":"https://doi.org/10.2166/wpt.2024.087","url":null,"abstract":"\u0000 \u0000 Giardia spp. cyst enumeration is a laboratory procedure that is frequently required in water treatment-related research. Currently, detection conducted by experts using fluorescence microscopy on samples stained with specific markers for Giardia spp. cysts is still the standard method, despite its high costs limiting its usage worldwide and, ultimately, hindering waterborne analyses in low-income countries. We present an approach based on darkfield imaging and machine learning to reduce costs associated with Giardia spp. cyst enumeration and the lack of experts. Automated counts were compared to manual counts, achieving an average sensitivity (SE) rate of 88%, specificity (SP) of 100% and accuracy of 88% across a wide range of cyst concentrations. By using machine learning in conjunction with darkfield microscopy, a low-cost illumination technique that can be easily integrated into standard laboratory microscopes, we have significantly reduced the costs associated with Giardia spp. cyst detection, all while still maintaining the SE and SP of fluorescence microscopy. Based on the findings, the proposed system has the potential to be a useful tool to enumerate Giardia spp. cyst suspensions. It can be accessed by virtually any microbiology laboratory as it is consumable-free and expert-independent.","PeriodicalId":104096,"journal":{"name":"Water Practice & Technology","volume":"59 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140727885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Chemically modified cellulose nanomaterial for remediation of nickel and lead from secondary runoff industrial wastewater 化学改性纤维素纳米材料用于二级径流工业废水中镍和铅的修复

Water Practice & Technology Pub Date : 2024-04-09 DOI: 10.2166/wpt.2024.085

Hizkeal Tsade Kara, H. A. Murthy, T. N. Kumar, C. Ravikumar

{"title":"Chemically modified cellulose nanomaterial for remediation of nickel and lead from secondary runoff industrial wastewater","authors":"Hizkeal Tsade Kara, H. A. Murthy, T. N. Kumar, C. Ravikumar","doi":"10.2166/wpt.2024.085","DOIUrl":"https://doi.org/10.2166/wpt.2024.085","url":null,"abstract":"\u0000 \u0000 An innovative and chemically amended succinic anhydride cellulose nanomaterial (S-CNM) adsorbent was synthesized from dried stem of Eichhornia crassipes weed, and was characterized for functional groups, crystallite size, surface morphology, morphological structure and particle size using Fourier transform infrared (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Brunauer–Emmett–Teller (BET) instruments, respectively. Previously characterized S-CNM was investigated to eliminate nickel and lead from secondary runoff wastewater (SERWW). Physicochemical properties of SERWW including organic matter (OM), nutrients, total inorganic nitrogen (TIN) and total phosphorus (TP) on the elimination capabilities of heavy metals were investigated. The S-CNM adsorbent was used fruitfully to exclude nickel and lead from SERWW. The mechanism study showed that the Langmuir isotherm was suited for lead removal and Freundlich isotherm was suited for nickel removal with maximum eliminating capability (qmax) of 156.25 and 60.24 mg g−1 using the S-CNM adsorbent, respectively. The elimination kinetic process fits well with pseudo-second-order and its data recommending the materials (S-CNM) are effective for wastewater treatment. The lead and nickel uptake capacities were influenced by the presence of positively charged ions. The S-CNM adsorbent indicated excellent reproducibility and was considered as a capable adsorption resource to eliminate lead and nickel from SERWW.","PeriodicalId":104096,"journal":{"name":"Water Practice & Technology","volume":"29 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140726626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparing the effect of carbon media on nutrient removal and greenhouse gas production in laboratory-scale bioreactors 比较碳介质对实验室规模生物反应器中营养物质去除和温室气体产生的影响

Water Practice & Technology Pub Date : 2024-04-05 DOI: 10.2166/wpt.2024.084

Jacqueline Kohn, Nicole E. Seitz Vermeer, Janelle F. Villeneuve, Mark Kadijk, Shanwei Xu

{"title":"Comparing the effect of carbon media on nutrient removal and greenhouse gas production in laboratory-scale bioreactors","authors":"Jacqueline Kohn, Nicole E. Seitz Vermeer, Janelle F. Villeneuve, Mark Kadijk, Shanwei Xu","doi":"10.2166/wpt.2024.084","DOIUrl":"https://doi.org/10.2166/wpt.2024.084","url":null,"abstract":"\u0000 \u0000 The performance of locally available agricultural carbon media (barley straw and hemp straw) was compared to woodchips for removing nitrate (NO3-N) and orthophosphate (PO4-P) in up-flow laboratory bioreactors. These media were tested in three replicates to quantify variability. The production of greenhouse gases nitrous oxide (N2O), methane (CH4) and carbon dioxide (CO2) were quantified. Influent water with NO3-N and PO4-P flowed continuously through bioreactors at a 4-h hydraulic retention time at 20 °C for 16 weeks. Nitrate removal reached up to 37% across all carbon media after the fifth week, with a removal rate of 64 g N m−3 d−1. Nitrate removal was affected by the type of carbon media in the order of barley straw > hemp straw > woodchips (P < 0.05). Most of the PO4-P rates declined rapidly after the first week for all carbon media meaning none were superior. Greenhouse gas production was dominated by CO2 with less CH4 and N2O produced. Production of N2O relative to nitrate removal for the three media remained low at 0.16 to 0.75%. The findings suggest that agricultural residues could perform better than woodchips for NO3-N removal although there was slightly higher N2O and CO2 production for these residues than woodchips.","PeriodicalId":104096,"journal":{"name":"Water Practice & Technology","volume":"15 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140738861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessment of heavy metal and other chemical pollution in Lake Tana along urban peripheries, Ethiopia 埃塞俄比亚塔纳湖城市周边地区重金属和其他化学污染评估

Water Practice & Technology Pub Date : 2024-04-04 DOI: 10.2166/wpt.2024.083

Feleke K. Sishu, Tigist Berhau Melese, Dagnachew Aklog

{"title":"Assessment of heavy metal and other chemical pollution in Lake Tana along urban peripheries, Ethiopia","authors":"Feleke K. Sishu, Tigist Berhau Melese, Dagnachew Aklog","doi":"10.2166/wpt.2024.083","DOIUrl":"https://doi.org/10.2166/wpt.2024.083","url":null,"abstract":"\u0000 This study investigates the heavy metals (HMs) and other constituents in Lake Tana around the Gulf of Bahir Dar City. The water sample was collected from areas receiving drainage water and a reference sample was collected from areas away from the urban impact, both during dry and wet seasons. Pollution sources and levels were determined using pollution indices and GIS spatial analyses. All in situ parameters were in the recommended range of the USEPA aquatic and WHO drinking water guidelines. The level of dissolved P was recorded between 0.03 and 0.9 mg/l and the level of N-NO3 ranged from 0.05 to 1.01 mg/l indicating that the limits were above USEPA aquatic criteria. The HMs varied from 0.08 to 2.85 mg/l for Cu, 0.10 to 1.60 mg/l for Fe, 0.04 to 0.22 mg/l for Cr, and Mn was below detection. Cr and Fe were above the aquatic and drinking water guideline limit. Spatially, pollution was more significant in areas receiving drainage. Also, except Cu and Fe, other parameters were higher in the rainy season indicating storm runoff pollution. The overall pollution indices of water quality status, such as water quality index 63, heavy metal pollution index 3.1, and nutrient pollution index 4.7, indicated the quality level of water to be alarming. Therefore, comprehensive regulatory and waste management practices are needed.","PeriodicalId":104096,"journal":{"name":"Water Practice & Technology","volume":"7 s2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140741759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental investigation on a new method for modifying the geometry of a vertical drop edge equipped with a screen on the amount of energy dissipation 关于修改装有筛网的垂直落差边缘几何形状的新方法对能量耗散量影响的实验研究

Water Practice & Technology Pub Date : 2024-04-02 DOI: 10.2166/wpt.2024.082

R. Daneshfaraz, R. Norouzi, Maryam Abar

引用次数: 0

Assessing the water quality of River Ganga in Varanasi, India, through WQI, NPI, and multivariate techniques: a comprehensive study 通过 WQI、NPI 和多元技术评估印度瓦拉纳西恒河的水质：一项综合研究

Water Practice & Technology Pub Date : 2024-02-14 DOI: 10.2166/wpt.2024.027

G. Singh, Supriya Chaudhary, Deepak Gupta, Virendra Kumar Mishra

{"title":"Assessing the water quality of River Ganga in Varanasi, India, through WQI, NPI, and multivariate techniques: a comprehensive study","authors":"G. Singh, Supriya Chaudhary, Deepak Gupta, Virendra Kumar Mishra","doi":"10.2166/wpt.2024.027","DOIUrl":"https://doi.org/10.2166/wpt.2024.027","url":null,"abstract":"\u0000 \u0000 The present research was conducted to study the water quality of the Ganga River in Varanasi. Water quality from nine different sampling points (S1–S9) from the River Ganga at Varanasi was examined for different water quality parameters, and multivariate statistical analyses were carried out. Subsequently, several indices, such as water quality index and Nemerow pollution index (NPI), were calculated. The results indicated that water in the Ganga River at Varanasi had high levels of coliform concentrations, altered pH, and elevated dissolved oxygen/biochemical oxygen demand and chemical oxygen demand values. The weighted arithmetic water quality index values revealed that sites S8, S9, and S2 were the most polluted and unfit for bathing and drinking. Most of the sampling sites have NPI values greater than 1 for several parameters, indicating high levels of pollution. The study revealed that the water quality is poor for bathing and drinking at most of the sites throughout the year. In addition, the upstream water quality assessment revealed that water quality was good compared with the heavily contaminated downstream region. This knowledge can be useful for environmentalists, policymakers, and water resource managers to develop strategic plans to preserve the cultural and aesthetic worth of the Ganga River in the future.","PeriodicalId":104096,"journal":{"name":"Water Practice & Technology","volume":"82 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139837656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessing the water quality of River Ganga in Varanasi, India, through WQI, NPI, and multivariate techniques: a comprehensive study 通过 WQI、NPI 和多元技术评估印度瓦拉纳西恒河的水质：一项综合研究

Water Practice & Technology Pub Date : 2024-02-14 DOI: 10.2166/wpt.2024.027

G. Singh, Supriya Chaudhary, Deepak Gupta, Virendra Kumar Mishra

{"title":"Assessing the water quality of River Ganga in Varanasi, India, through WQI, NPI, and multivariate techniques: a comprehensive study","authors":"G. Singh, Supriya Chaudhary, Deepak Gupta, Virendra Kumar Mishra","doi":"10.2166/wpt.2024.027","DOIUrl":"https://doi.org/10.2166/wpt.2024.027","url":null,"abstract":"\u0000 \u0000 The present research was conducted to study the water quality of the Ganga River in Varanasi. Water quality from nine different sampling points (S1–S9) from the River Ganga at Varanasi was examined for different water quality parameters, and multivariate statistical analyses were carried out. Subsequently, several indices, such as water quality index and Nemerow pollution index (NPI), were calculated. The results indicated that water in the Ganga River at Varanasi had high levels of coliform concentrations, altered pH, and elevated dissolved oxygen/biochemical oxygen demand and chemical oxygen demand values. The weighted arithmetic water quality index values revealed that sites S8, S9, and S2 were the most polluted and unfit for bathing and drinking. Most of the sampling sites have NPI values greater than 1 for several parameters, indicating high levels of pollution. The study revealed that the water quality is poor for bathing and drinking at most of the sites throughout the year. In addition, the upstream water quality assessment revealed that water quality was good compared with the heavily contaminated downstream region. This knowledge can be useful for environmentalists, policymakers, and water resource managers to develop strategic plans to preserve the cultural and aesthetic worth of the Ganga River in the future.","PeriodicalId":104096,"journal":{"name":"Water Practice & Technology","volume":"56 36","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139777888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Photobleaching of face mask dyes BB and CR using novel BPPNTs-V2O5 nanotube composites: DFT studies of self-assembly and nanoclusters 使用新型 BPPNTs-V2O5 纳米管复合材料对面罩染料 BB 和 CR 进行光漂白：自组装和纳米团簇的 DFT 研究

Water Practice & Technology Pub Date : 2024-02-13 DOI: 10.2166/wpt.2024.026

K. Sivasankari, R. Naveenkumar, B. Karthikeyan

引用次数: 0

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