Water Quality Research Journal最新文献_第10页

Impact of local climate change on drinking water quality in a distribution system 当地气候变化对配水系统饮用水质量的影响

IF 2.3 4区环境科学与生态学

Water Quality Research Journal Pub Date : 2019-08-01 DOI: 10.2166/WQRJ.2019.054

D. Kimbrough

{"title":"Impact of local climate change on drinking water quality in a distribution system","authors":"D. Kimbrough","doi":"10.2166/WQRJ.2019.054","DOIUrl":"https://doi.org/10.2166/WQRJ.2019.054","url":null,"abstract":"\u0000 In this study, air temperatures were collected between 1985 and 2016 and compared with water temperatures in four locations in the distribution system of Pasadena Water and Power (PWP), which received surface water imported into Pasadena between 2001 and 2016 from the Metropolitan Water District. The concentrations of chloramine residual and nitrite concentrations were collected between 2001 and 2016 from these five locations. The results indicate that the median nighttime temperature of the period 2009–2016 was 1.6 °C warmer than the period 1985–2000 and 0.5 °C warmer than the period 2001–2008. The median water temperature in the four distribution system samples increased by 0.8–1.4 °C depending on the location over the study period (p < 0.001). The median chloramine concentration fell significantly (p < 0.001) at three distribution system locations, and the nitrite concentrations increased significantly at all four distribution system locations (p < 0.001). As air temperature in the study area increased, water temperatures also increased resulting in the loss of disinfectant residual and the increase in the activity of ammonia-oxidizing bacteria. As this represented an increased risk to public health, PWP took additional steps to increase disinfectant residuals by adding chlorine and flushing stale water. In localities where climate change is most measurable, local water purveyors must adapt to warmer water to ensure stable concentrations of disinfectants.\u0000 This article has been made Open Access thanks to the kind support of CAWQ/ACQE (https://www.cawq.ca).","PeriodicalId":23720,"journal":{"name":"Water Quality Research Journal","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2166/WQRJ.2019.054","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48479919","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}

引用次数: 3

Decision tree techniques to assess the role of daily DO variation in classifying shallow eutrophicated lakes in Hanoi, Vietnam 决策树技术评估每日DO变化在越南河内浅层富营养化湖泊分类中的作用

IF 2.3 4区环境科学与生态学

Water Quality Research Journal Pub Date : 2019-07-18 DOI: 10.2166/WQRJ.2019.105

T. Hoang, V. Nguyen, Anh D. Van, H. T. Nguyen

{"title":"Decision tree techniques to assess the role of daily DO variation in classifying shallow eutrophicated lakes in Hanoi, Vietnam","authors":"T. Hoang, V. Nguyen, Anh D. Van, H. T. Nguyen","doi":"10.2166/WQRJ.2019.105","DOIUrl":"https://doi.org/10.2166/WQRJ.2019.105","url":null,"abstract":"\u0000 Eutrophication is a serious phenomenon in shallow lakes in Hanoi. The most important effect is the change of dissolved oxygen (DO) in the water column. The value of DO in water changed over time, and the variation of DO proved to be more important than the absolute value. The research aimed to assess the role of daily DO variation in classifying the eutrophication status of shallow lakes in Hanoi. Data were collected in eight shallow eutrophicated lakes in Hanoi during 2015–2017 in relation to water quality parameters. A large variation of DO was observed with the maximum value achieved at 15–17 h (180% saturation DO) and the minimum value at 4–6 h (20% saturation DO). The lowest DO value reached 1.5 mg/L, which was much lower than the threshold of survival of some aquatic animals. The daily DO fluctuations correlated with phytoplankton density, the Trophic State Index (TSI), chlorophyll-a concentration and density, and the proportion of DIN:PO4, showing the close relationship between DO variation and eutrophication in the lakes. The decision trees were developed and also selected the ΔDO as the driving variable in classifying the eutrophication status in lakes. The daily DO variation could be an important indicator for eutrophication.","PeriodicalId":23720,"journal":{"name":"Water Quality Research Journal","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2019-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2166/WQRJ.2019.105","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43261870","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}

引用次数: 10

Pharmaceuticals and pesticides in rural community drinking waters of Quebec, Canada – a regional study on the susceptibility to source contamination 加拿大魁北克省农村社区饮用水中的药品和农药——对污染源易感性的区域研究

IF 2.3 4区环境科学与生态学

Water Quality Research Journal Pub Date : 2019-05-01 DOI: 10.2166/WQRJ.2019.038

Barry R. Husk, Juan Sebastián Sánchez, R. Leduc, L. Takser, O. Savary, H. Cabana

{"title":"Pharmaceuticals and pesticides in rural community drinking waters of Quebec, Canada – a regional study on the susceptibility to source contamination","authors":"Barry R. Husk, Juan Sebastián Sánchez, R. Leduc, L. Takser, O. Savary, H. Cabana","doi":"10.2166/WQRJ.2019.038","DOIUrl":"https://doi.org/10.2166/WQRJ.2019.038","url":null,"abstract":"In Canada, the presence of pharmaceuticals and pesticides in municipal drinking water has been examined primarily in larger urban centres which draw their supplies from surface water. However, few studies have examined this issue in smaller and rural communities, which represent nearly one-third of the Canadian population and which draw their drinking water mainly from groundwater. This study presents a regional-scale assessment of the presence of these contaminants in the drinking waters of 17 smaller rural communities, compared with two larger urban communities, in south-central Quebec. From a total of 70 chemicals examined, 15 compounds (nine pharmaceuticals and six pesticides) were detected. The three most frequently detected contaminants were caffeine, atrazine and naproxen, respectively, in 29%, 24% and 21% of the samples. Detections reported here for the first time in Quebec drinking water include the known human carcinogen cyclophosphamide and the fungicide thiabendazole. Maximum concentrations of pharmaceuticals ranged from 30 to 1,848 ng L−1 and of pesticides from 21 to 856 ng L−1. This study provides direct evidence that drinking water in smaller, rural communities of Quebec, Canada, whether sourced from groundwater or surface water, can contain measurable levels of pharmaceuticals and pesticides, indicative of their susceptibility to source contamination.This article has been made Open Access thanks to the kind support of CAWQ/ACQE (https://www.cawq.ca).","PeriodicalId":23720,"journal":{"name":"Water Quality Research Journal","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2166/WQRJ.2019.038","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43381147","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}

引用次数: 23

Water Quality Protection 水质保护

IF 2.3 4区环境科学与生态学

Water Quality Research Journal Pub Date : 2019-01-01 DOI: 10.1007/978-3-030-23335-8_18

C. Boyd

引用次数: 8

Suspended Solids, Color, Turbidity, and Light 悬浮物，颜色，浊度和光

IF 2.3 4区环境科学与生态学

Water Quality Research Journal Pub Date : 2019-01-01 DOI: 10.1007/978-3-030-23335-8_6

C. Boyd

引用次数: 9

Solubility and Chemical Equilibrium 溶解度和化学平衡

IF 2.3 4区环境科学与生态学

Water Quality Research Journal Pub Date : 2019-01-01 DOI: 10.1007/978-3-030-23335-8_4

C. Boyd

引用次数: 2

Solar Radiation and Water Temperature 太阳辐射和水温

IF 2.3 4区环境科学与生态学

Water Quality Research Journal Pub Date : 2019-01-01 DOI: 10.1007/978-3-030-23335-8_2

C. Boyd

引用次数: 4

Carbon Dioxide, pH, and Alkalinity 二氧化碳，pH值和碱度

IF 2.3 4区环境科学与生态学

Water Quality Research Journal Pub Date : 2019-01-01 DOI: 10.1007/978-3-030-23335-8_9

C. Boyd

引用次数: 7

Mapping the summer 2017 surface water circulation of Picton Bay, ON 2017年夏季皮克顿湾地表水循环图

IF 2.3 4区环境科学与生态学

Water Quality Research Journal Pub Date : 2018-12-04 DOI: 10.2166/WQRJ.2018.011

J. Shore, P. Snell

{"title":"Mapping the summer 2017 surface water circulation of Picton Bay, ON","authors":"J. Shore, P. Snell","doi":"10.2166/WQRJ.2018.011","DOIUrl":"https://doi.org/10.2166/WQRJ.2018.011","url":null,"abstract":"\u0000 On March 24, 2017, a fuel spill from a partially submerged barge in Picton Bay contaminated the source water for the drinking water supply of the local township. Immediately after the spill, management decisions regarding the water intake plant operations were made based on contaminant observations and projected wind conditions. From a management perspective, it is essential to understand all the dynamical forcing for a system to direct the best decision-making but, unfortunately, there are no historical observations of currents in Picton Bay or any in-depth numerical modelling studies that have established the circulation patterns or hydrodynamics of the bay. This paper presents observations of surface speeds and drifter pathways collected using Lagrangian drifters and compares the observations to the velocity field estimates from a wind forced three-dimensional hydrodynamic model. Surface drifters were deployed from July to September and moved southwest into the bay during each deployment with almost no tendency to turn and drift out of the bay. Model simulations indicated that currents in the bay are sensitive to small-scale local winds and that a boundary current exists that connects the spill site to the area of the water intake pipes in wind conditions that are to the southwest or southeast.","PeriodicalId":23720,"journal":{"name":"Water Quality Research Journal","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2018-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2166/WQRJ.2018.011","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45861131","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}

引用次数: 1

Ion-exchange for trihalomethane control in potable water treatment – a municipal water treatment case study in Rainy River, Ontario, Canada 离子交换控制饮用水处理中的三卤甲烷——加拿大安大略省Rainy River市城市水处理案例研究

IF 2.3 4区环境科学与生态学

Water Quality Research Journal Pub Date : 2018-12-03 DOI: 10.2166/WQRJ.2018.134

K. Brezinski, B. Gorczyca, Mehrnaz Sadrnourmohammadi

{"title":"Ion-exchange for trihalomethane control in potable water treatment – a municipal water treatment case study in Rainy River, Ontario, Canada","authors":"K. Brezinski, B. Gorczyca, Mehrnaz Sadrnourmohammadi","doi":"10.2166/WQRJ.2018.134","DOIUrl":"https://doi.org/10.2166/WQRJ.2018.134","url":null,"abstract":"\u0000 The objectives of this study were to investigate the ability for ion-exchange (IX) to control trihalomethane (THM) formation, and to act as a potential treatment addition (upgrade) to a conventional treatment plant in Rainy River Ontario, Canada. The primary goal was to investigate the total organic carbon (TOC) and trihalomethane formation potential (THMFP) removal as a function of resin dose; and note the relative improvements over current conventional plant operation. IX resin (DOWEX TAN-1, Purolite 502P and 860, and Amberlite PWA9) removed 68–72% of TOC and 30–40% THMFP from the conventionally filtered water. Fixed-bed fluidized bed contactor was used to investigate the TOC/THMFP breakthrough for the DOWEX TAN-1 resin. Complete resin breakthrough occurred followed by 1,275 and 1,075 bed volumes for TOC and THMFP, respectively. Breakthrough output following 1,000 treated bed volumes was noted as the point at which THMFP levels reach the 0.1 mg L–1 water quality standard threshold required by Canadian regulators. High exchange capacities were recorded for the TAN-1 (3.02 mg mL–1) and PWA9 (2.03 mg mL–1) resins – both of which contain styrene backbones. The results produced in the bench-scale experiments were used very successfully in a full-scale upgrade of the Rainy River water treatment plant.","PeriodicalId":23720,"journal":{"name":"Water Quality Research Journal","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2018-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2166/WQRJ.2018.134","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49609681","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}

引用次数: 6