Water Cycle最新文献_第10页

Quantifying phosphorous loadings in the Thames River in Canada 量化加拿大泰晤士河的磷负荷

Water Cycle Pub Date : 2021-01-01 DOI: 10.1016/j.watcyc.2021.06.002

Tony Van Rossum , Yaghoub (Jacobe) Norouzi

引用次数: 2

Relative developmental toxicities of reclaimed water to zebrafish embryos and the relationship with relevant water quality parameters 再生水对斑马鱼胚胎的相对发育毒性及其与相关水质参数的关系

Water Cycle Pub Date : 2021-01-01 DOI: 10.1016/j.watcyc.2021.11.003

Chun Wang , Zi-Xi Yuan , Yao-Yao Liu , Qian-Yuan Wu , Ying-Xue Sun

{"title":"Relative developmental toxicities of reclaimed water to zebrafish embryos and the relationship with relevant water quality parameters","authors":"Chun Wang , Zi-Xi Yuan , Yao-Yao Liu , Qian-Yuan Wu , Ying-Xue Sun","doi":"10.1016/j.watcyc.2021.11.003","DOIUrl":"10.1016/j.watcyc.2021.11.003","url":null,"abstract":"<div>Reclaimed water recharging rivers is an important way to solve the problem of water shortage. However, reclaimed water contains some toxic contaminants, which will cause ecological and health risks. The objective of this study is to explore the relationship between developmental toxicities and relevant water quality parameters. Zebrafish embryos were exposed to secondary effluent, wastewater with advanced treatment (Tertiary treatment effluent) and blank (Aerated tap water). The samples taken in April showed higher biological toxicity to embryos, as the maximum value of mortality and malformation reached to 47.5 % for secondary effluent, 75 % for wastewater with advance treatment, while the blank was just 2 % at 120 hours post fertilization. The tested samples also showed significantly adverse effect on hatchability of zebrafish. The hatching rates of embryos exposed to secondary effluent and tertiary treatment effluent were much lower than blank. And significant delay in hatching time existed during the hatching period. The advanced treatment did not show beneficial effects for reducing acute toxicity. The main factor resulted in hatching inhibition may be ammonia especially the free ammonia, as it showed highest coefficient with hatching rate. The no observed effect concentration (NOEC) of ammonia for mortality and malformation were 5 mg/L and 10 mg/L respectively. The lowest observed effect concentration (LOEC) of ammonia for body length and hatchability were both 2 mg/L, while the concentration of free ammonia was 0.19 mg/L. Considering the biological toxicity of ammonia on aquatic organism, the discharge concentration of ammonia is advised to be controlled below 2 mg/L.</div>","PeriodicalId":34143,"journal":{"name":"Water Cycle","volume":"2 ","pages":"Pages 85-90"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666445321000088/pdfft?md5=226d5dbc2b42de411f1b493a645eadd7&pid=1-s2.0-S2666445321000088-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44451716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Monthly river flows in Texas for natural and developed conditions 德克萨斯州自然和发达条件下的月度河流流量

Water Cycle Pub Date : 2021-01-01 DOI: 10.1016/j.watcyc.2020.10.001

Ralph A. Wurbs

{"title":"Monthly river flows in Texas for natural and developed conditions","authors":"Ralph A. Wurbs","doi":"10.1016/j.watcyc.2020.10.001","DOIUrl":"10.1016/j.watcyc.2020.10.001","url":null,"abstract":"<div>River flow characteristics and computational methods for converting sequences of monthly flows between natural and regulated conditions are explored based on experience in assessing water availability throughout the state of Texas in the United States. Diverse climate, hydrology, economic development, and water management practices across the state combined with continual population growth and implementation of a statewide water availability modeling system makes Texas an excellent case study of stream flow characteristics and modeling and analysis methods that are relevant worldwide. Stream flow is extremely variable, subject to severe multiple-year droughts, intense floods, seasonality, and continuous fluctuation. The effects of population and economic growth, water resources development and management, and climatic variability on river flows vary with different conditions found across the state. The modeling system provides capabilities for adjusting observed river flows to represent natural conditions, simulating regulated flows representing specified conditions of development, and performing statistical frequency and reliability analyses.</div>","PeriodicalId":34143,"journal":{"name":"Water Cycle","volume":"2 ","pages":"Pages 1-14"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.watcyc.2020.10.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"55192763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Compiling non-parametric tests along with CA-ANN model for precipitation trends and variability analysis: A case study of Eastern India 编制用于降水趋势和变率分析的非参数检验和CA-ANN模型:以印度东部为例

Water Cycle Pub Date : 2021-01-01 DOI: 10.1016/j.watcyc.2021.11.002

Debabrata Sarkar , Trishna Sarkar , Sunil Saha , Prolay Mondal

{"title":"Compiling non-parametric tests along with CA-ANN model for precipitation trends and variability analysis: A case study of Eastern India","authors":"Debabrata Sarkar , Trishna Sarkar , Sunil Saha , Prolay Mondal","doi":"10.1016/j.watcyc.2021.11.002","DOIUrl":"10.1016/j.watcyc.2021.11.002","url":null,"abstract":"<div>In the present research, mean monthly precipitation data have been used to analyze the existing trends of the precipitation for the periods of 1981–2019 using non-parametric methods as the Mann-Kendall test and Sen's Slope (β). The results show a positive increasing trend in annual precipitation in the south whereas the central part of the study area recorded insignificant declining tends of precipitation over the last century. The maximum decrease in annual precipitation is detected in the Raiganj station (−0.286 mm/year). Alipore station recorded the maximum increase (1.354 mm/year) and the maximum decrease of monsoonal precipitation recorded in Malda station (−1.155 mm/year). The average coefficient value of all stations of winter is 72.83% whereas seasonally the coefficient of variation is low as 19.21% in monsoon time. The high coefficient value in winter (72.83%), pre-monsoon (39.70%), and post-monsoon (34.68%) depicting the weather severity in the study area. For forecasting potential rainfall patterns CA-ANN method was utilized and the high kappa value of the forecasted maps illustrates the authenticity of the findings. The annual rainfall will notice a little of 0.26% of rises in rainfall quantity from 2023 to 2027 and the post-monsoon rainfall will experience a major decline of 8.53% by the year 2023. For the policymakers, this study significantly enhances the climatic knowledge regarding the study region and that can help in managing resources and overall development of this area.</div>","PeriodicalId":34143,"journal":{"name":"Water Cycle","volume":"2 ","pages":"Pages 71-84"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666445321000076/pdfft?md5=f735374f1d700c7268e770a3d128050e&pid=1-s2.0-S2666445321000076-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47670986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Water utilities’ improvement: The need for water and energy management techniques and skills 水务设施的改善:对水和能源管理技术和技能的需求

Water Cycle Pub Date : 2021-01-01 DOI: 10.1016/j.watcyc.2021.05.002

Lugano Wilson, Kevin Nsolloh Lichinga, Atupele Burton Kilindu, Augustino Alfred Masse

{"title":"Water utilities’ improvement: The need for water and energy management techniques and skills","authors":"Lugano Wilson, Kevin Nsolloh Lichinga, Atupele Burton Kilindu, Augustino Alfred Masse","doi":"10.1016/j.watcyc.2021.05.002","DOIUrl":"10.1016/j.watcyc.2021.05.002","url":null,"abstract":"<div>Water supply systems consume energy through individual treatment and pumping equipment and the level of consumption is dependent on many factors such as equipment age, operational control and maintenance status. The operator's skills are also influential on water systems energy consumption. Since energy cost to Tanzania Utilities constitutes up to 40% of operating cost, there is a motivation to reduce energy consumption. Besides energy costs, the utilities suffer from water losses, Non-Revenue Water (NRW) which leads to energy loss.However, energy management is mostly skill-related, Utility staff must be aware of standard energy management practises to come up with preventive and corrective measures to combat energy use. Energy management practises entails utilities organization, technical and behaviour practises with objective of improving energy performance. In order to bridge the skills-gap this paper is presenting the authors’ experience in implementing energy management practises to Water Utilities. This takes into consideration that Tanzania Industrial Research and Development Organization (TIRDO) has a track record of delivering energy management techniques.Findings showed limited awareness on energy management practises from top management to lower level and inadequate energy management skills. Though some Utilities are already implementing energy management measures, the majority lack skills in production and energy data analysis for developing key performance indicators. Absence of advanced skills in undertaking energy auditing for preparing bankable proposals for convincing management to invest in energy management measures is rampant. The general recommendation is to increase energy efficiency awareness and impart of energy management skills within Utilities through training and skills development programme.</div>","PeriodicalId":34143,"journal":{"name":"Water Cycle","volume":"2 ","pages":"Pages 32-37"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.watcyc.2021.05.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"104675633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Co3O4/GO catalyst as efficient heterogeneous catalyst for degradation of wastewater containing polyacrylamide(PAM) Co3O4/GO催化剂对含聚丙烯酰胺(PAM)废水的高效非均相降解

Water Cycle Pub Date : 2021-01-01 DOI: 10.1016/j.watcyc.2020.12.001

Can Kong , Fang Liu , Hui Sun , Zhou Zhang , Benjie Zhu , Wei Li

引用次数: 14

Nitrilotriacetic acid enhanced UV/Fe0/H2O2 process for salty wastewater treatment at neutral pH 中性pH条件下硝化三乙酸强化UV/Fe0/H2O2工艺处理含盐废水

Water Cycle Pub Date : 2021-01-01 DOI: 10.1016/j.watcyc.2021.11.004

Yuwei Pan , Zhujun Dong , Yi Pan , Yizhen Zhang

{"title":"Nitrilotriacetic acid enhanced UV/Fe0/H2O2 process for salty wastewater treatment at neutral pH","authors":"Yuwei Pan , Zhujun Dong , Yi Pan , Yizhen Zhang","doi":"10.1016/j.watcyc.2021.11.004","DOIUrl":"10.1016/j.watcyc.2021.11.004","url":null,"abstract":"<div>In this study, nitrilotriacetic acid (NTA) was used to enhance UV/Fe0/H2O2 process for highly salty wastewater at neutral pH. The addition of Fe0 could not accelerate the UV/H2O2 process for salty wastewater treatment at neutral pH due to the precipitation of Fe ions. While NTA added into UV/Fe0/H2O2 process which could form complex with Fe ion, the tartrazine removal could increase from 45.7% to 84.7% within 60 min. The k-value of the UV/Fe0-NTA/H2O2 system to remove tartrazine is also 2.2 times higher than that in UV/Fe0/H2O2 system. Meanwhile, the UV/Fe0-NTA/H2O2 process could obtain good performance for salt wastewater treatment under a wide salt concentration level of 0–0.2 M. It can also expand the application range of pH to neutral pH. SEM and XPS characterization showed that the corrosion rate of Fe0 in salty system was faster, and the presence of NTA could accelerate the recirculation of Fe3+/Fe2+ on the Fe0 surface. EPR spectroscopic analysis and scavenge experiments showed that •OH was the main reactive radical for the removal of tartrazine in the UV/Fe0-NTA/H2O2 system. In addition, the k-value for removing tartrazine in various types of salt systems in the UV/Fe0-NTA/H2O2 system was 3.2–4.2 times that of the UV/Fe0/H2O2 system. It demonstrated UV/Fe0-NTA/H2O2 processes fits to different types of salt system. Therefore, this study will provide a new method for the treatment of saline wastewater at neutral pH.</div>","PeriodicalId":34143,"journal":{"name":"Water Cycle","volume":"2 ","pages":"Pages 91-100"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S266644532100009X/pdfft?md5=64542b1dce16bad1e99d1a2bdee02fe2&pid=1-s2.0-S266644532100009X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47290594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Message from editor-in-chief 总编辑留言

Water Cycle Pub Date : 2020-01-01 DOI: 10.1016/j.watcyc.2020.05.002

Hong-Ying Hu

引用次数: 0

Constructed treatment wetland: Glance of development and future perspectives 人工处理湿地:发展概览与未来展望

Water Cycle Pub Date : 2020-01-01 DOI: 10.1016/j.watcyc.2020.07.002

Yaqian Zhao , Bin Ji , Ranbin Liu , Baiming Ren , Ting Wei

引用次数: 38

Nutrient recovery from animal manure using bipolar membrane electrodialysis: Study on product purity and energy efficiency 利用双极膜电渗析回收动物粪便中的营养物质:产品纯度和能效的研究

Water Cycle Pub Date : 2020-01-01 DOI: 10.1016/j.watcyc.2020.06.002

Lin Shi , Liwen Xiao , Zhenhu Hu , Xinmin Zhan

{"title":"Nutrient recovery from animal manure using bipolar membrane electrodialysis: Study on product purity and energy efficiency","authors":"Lin Shi , Liwen Xiao , Zhenhu Hu , Xinmin Zhan","doi":"10.1016/j.watcyc.2020.06.002","DOIUrl":"https://doi.org/10.1016/j.watcyc.2020.06.002","url":null,"abstract":"<div>Bipolar membrane electrodialysis (BMED) is promising in nutrient recovery from wastewater containing nitrogen (N) and phosphorus (P), while studies on its product impurity and energy efficiency are insufficient. In this study, we systematically assessed the application of BMED into nutrient recovery from animal manure, with three membrane configurations investigated, i.e. three-compartment BMED, base-BMED and acid-BMED. The three-compartment BMED presented efficient removal of both NH4+ and phosphate from the feed solution but high impurity in the base and acid product solutions. The base-BMED generated a pure base solution but was insufficient in NH4+ recovery with around 40% of NH4+ unrecovered, while the acid-BMED showed severe NH4+ contamination of the acid solution similar to the three-compartment BMED. The energy in BMED was mainly consumed by membranes, electrodes and the solution resistance in the late operational stage, being around 55%, 15% and 28% for each, respectively; while the water dissociation in bipolar membranes contributed to 80% of the total energy consumption on membranes. Undesired NH3 diffusion from the base compartment to adjacent compartments containing acidic solution was the main cause of product impurity. Hence, a simultaneous flowing mode integrating the base-BMED with the acid-BMED configurations was proposed. In this mode, NH3 diffusion was prevented and NH3 was concentrated up to 16 g/L in the base solution. This study provided valuable insights into BMED and proposed a novel BMED flowing mode to increase product purity, which is of high practical significance.</div>","PeriodicalId":34143,"journal":{"name":"Water Cycle","volume":"1 ","pages":"Pages 54-62"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.watcyc.2020.06.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"92077259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 20