Tracing the contamination origins in water sources and identifying the impacts of natural and human processes are essential for ecological safety and public health.However,current analysis approaches are not ideal,as ...Tracing the contamination origins in water sources and identifying the impacts of natural and human processes are essential for ecological safety and public health.However,current analysis approaches are not ideal,as they tend to be laborious,time-consuming,or technically difficult.Disinfection byproducts(DBPs)are a family of well-known secondary pollutants formed by the reactions of chemical disinfectants with DBP precursors during water disinfection treatment.Since DBP precursors have various origins(e.g.,natural,domestic,industrial,and agricultural sources),and since the formation of DBPs from different precursors in the presence of specific disinfectants is distinctive,we argue that DBPs and DBP precursors can serve as alternative indicators to assess the contamination in water sources and identify pollution origins.After providing a retrospective of the origins of DBPs and DBP precursors,as well as the specific formation patterns of DBPs from different precursors,this article presents an overview of the impacts of various natural and anthropogenic factors on DBPs and DBP precursors in drinking water sources.In practice,the DBPs(i.e.,their concentration and speciation)originally present in source water and the DBP precursors determined using DBP formation potential tests—in which water samples are dosed with a stoichiometric excess of specific disinfectants in order to maximize DBP formation under certain reaction conditions—can be considered as alternative metrics.When jointly used with other water quality parameters(e.g.,dissolved organic carbon,dissolved organic nitrogen,fluorescence,and molecular weight distribution)and specific contaminants of emerging concern(e.g.,certain pharmaceuticals and personal care products),DBPs and DBP precursors in drinking water sources can provide a more comprehensive picture of water pollution for better managing water resources and ensuring human health.展开更多
Correction to:Front.Environ.Sci.Eng.2024,18(9):117 The authors regret that there are some mistakes in Fig.3 and Section 3.2 in text of the original version of the above article.The units of the vertical axis in Fig.3 ...Correction to:Front.Environ.Sci.Eng.2024,18(9):117 The authors regret that there are some mistakes in Fig.3 and Section 3.2 in text of the original version of the above article.The units of the vertical axis in Fig.3 should be corrected fromμg/L to ng/L.The correct picture appears below.Correspondingly,the units in the Section 3.2 the text should also be modified accordingly,and the correct presentation is:3.2 Spatiotemporal distribution characteristics of antibiotics The antibiotic contents detected in the water samples collected in December,March,and June are shown in Fig.3.Sulfonamide antibiotics were the most frequently detected antibiotics in the water samples,it was also closely related to the widespread use of sulfonamides.展开更多
Today, various traditional country foods are increasingly being neglected as a result of modernisation. Consequently, the knowledge and know-how necessary to prepare those foods are strongly threatened. To safeguard a...Today, various traditional country foods are increasingly being neglected as a result of modernisation. Consequently, the knowledge and know-how necessary to prepare those foods are strongly threatened. To safeguard and foster appreciation of traditional knowledge, this study aims, on the one hand, to describe the manufacturing process of an alcoholic drink called “Mbite”. The latter is traditionally prepared with the fruits of Sclerocarya birrea (A. Rich) Hostcht in Senegal. On the other hand, various controlled fermentations have been tested for better control of their hygienic and sanitary qualities. The manufacturing of “Mbite” drink begins with a manual extraction of the juice using stems of Guiera senegalensis or Combretum glutinosum to facilitate the separation of the pericarp from the almond. Subsequently, the extracts are filtered and/or mixed according to the producers. Finally, a 2-day spontaneous fermentation by endogenous yeasts of the fruit makes it possible to obtain the alcoholic drink within 3 days. “Mbite” is a low acid drink with a pH ranging from 3.82 to 3.97 and its ethanol content varies from 2 to 4% (v/v). Polyphenols vary between 124.92 and 158.25 mg/100 mL. However, microbiological analyses have shown a high number of lactic acid bacteria involved in the formation of volatile acids. The controlled fermentation trials have resulted in a unique alcoholic fermentation of Sclerocarya birrea juices by selected strains of Saccharomyces cerevisae. This has the advantage of guaranteeing sanitary qualities and reducing the fermentation time from three days to one.展开更多
Background: The restrictive lockdown measures that were introduced as a response to the COVID-19 pandemic imposed constraints that affected university students’ drinking habits and mental health. Methods: The current...Background: The restrictive lockdown measures that were introduced as a response to the COVID-19 pandemic imposed constraints that affected university students’ drinking habits and mental health. Methods: The current study evaluated the rate of binge drinking among university students as they returned to normal life post-lockdown and whether binge drinking affected their mental health and quality of life. A cross-sectional study included 1382 university students (18 - 24 years) of one private Southwestern university in Brazil. Alcohol Use Disorders Identification, the Beck Depression Inventory-II, and the World Health Organization Quality of Life Brief were used. Data were collected after the COVID-19 pandemic lockdown period (from October 2021 to May 2022). Results: 52.6% of the students reported binge drinking, and 35.6% reported symptoms of depression. Binge drinkers were 1.41 times more likely to experience depressive symptoms when compared with non-binge drinkers, and binge drinking was a risk factor for lower quality of life in all three domains (physical, psychological and environmental). Conclusion: Our study highlights an increased prevalence of binge drinking in university students after the pandemic lockdown. The rise in binge drinking rates was linked to depressive symptoms and worsening of quality of life.展开更多
Ice pigging is an emerging technique for pipe cleaning in drinking water distribution systems.However,substantial confusion and controversy exist on the potential impacts of ice pigging on bulk water quality.This stud...Ice pigging is an emerging technique for pipe cleaning in drinking water distribution systems.However,substantial confusion and controversy exist on the potential impacts of ice pigging on bulk water quality.This study monitored the microstructural features and composition of sediments and microbial community structures in bulk water in eight multimaterial Chinese networks.Chloride concentration analysis demonstrated that separate cleaning of pipes with different materials in complex networks could mitigate the risk of losing ice pigs and degrading water quality.The microstructural and trace element characterization results showed that ice pigs would scarcely disturb the inner surfaces of long-used pipes.The bacterial richness and diversity of bulk water decreased significantly after ice pigging.Furthermore,correlations were established between pipe service age,temperature,and chloride and total iron concentrations,and the 15 most abundant taxa in bulk water,which could be used to guide practical ice pigging operations.展开更多
Drinking good quality water is essential for better health. It is therefore essential to assess the radiological quality of all water consumed in the District of Abidjan in order to prevent related hazards. Thus, the ...Drinking good quality water is essential for better health. It is therefore essential to assess the radiological quality of all water consumed in the District of Abidjan in order to prevent related hazards. Thus, the objective of this study was to assess the risk of cancer due to the ingestion of alpha and beta emitting radionuclides in the different types of water consumed in the region. A total of 63 water samples with 43 tap water samples, 5 bottled mineral water and 15 sachet water samples was collected and taken to GAEC laboratory for analysis. The low background Gas-less Automatic Alpha/Beta counting system (Canberra iMatic<sup>TM</sup>) was used to determine alpha and beta activity concentrations. Activity concentrations of both gross alpha and gross beta obtained in water sample were respectively lower than the WHO recommended limits of 0.1 Bq/l and 1 Bq/l. Also, the annual effective dose and total equivalent effective dose found in mineral bottled water samples were higher than in other types of water. The assessment of radiological lifetime risk has shown values of cancer risk due to ingestion alpha and beta emitters lower than recommended limit. These results indicate that there is no health hazard associated to consumption of water in the District of Abidjan.展开更多
With the population growth through natural growth and migration,coupled with the city expansion,it is the fact that Dehradun City in India faces severe water scarcity.Therefore,the Song Dam Drinking Water Project(SDDW...With the population growth through natural growth and migration,coupled with the city expansion,it is the fact that Dehradun City in India faces severe water scarcity.Therefore,the Song Dam Drinking Water Project(SDDWP)is proposed to provide ample drinking water to Dehradun City and its suburban areas.This paper examined economic significance and environmental impacts of the SDDWP in Garhwal Himalaya,India.To conduct this study,we collected data from both primary and secondary sources.There are 12 villages and 3 forest divisions in the surrounding areas of the proposed dam project,of which 3 villages will be fully submerged and 50 households will be affected.For this study,50 heads of the households were interviewed in the 3 submerged villages.The questions mainly focused on economic significance,environmental impacts,and rehabilitation issues of the dam project.The findings of this study indicate that economic significance of the dam project is substantial,including providing ample water for drinking and irrigation,contributing to groundwater recharge,creating job opportunities,and promoting the development of tourism and fisheries in the Doon Valley.In terms of the rehabilitation of the affected people,there are only 50 households in need of rehabilitation.Currently,the arable land of these affected people is not sufficient to sustain their livelihoods.The entire landscape is fragile,rugged,and precipitous;therefore,the affected people are willing to rehabilitate to more suitable areas in the Doon Valley.Moreover,it is essential to provide them with sufficient compensation packages including the compensation of arable land,houses,cash,common property resources,institutions,belongingness,and cultural adaptation.On the other hand,the proposed dam project will have adverse environmental impacts including arable land degradation,forest degradation,loss of fauna and flora,soil erosion,landslides,and soil siltation.These impacts will lead to the ecological imbalances in both upstream and downstream areas.This study suggests that the affected people should be given sufficient compensation packages in all respects.Afforestation programs can be launched in the degraded areas to compensate for the loss of forest in the affected areas.展开更多
新污染物(emerging contaminants)概念于2001年首次被国外学者提出,目前已经成为全球环境和市政领域关注的热点话题。饮用水是新污染物重要的暴露途径之一,因此评估自来水厂处理工艺对新污染物的去除效果具有重要意义。本文综述了供水...新污染物(emerging contaminants)概念于2001年首次被国外学者提出,目前已经成为全球环境和市政领域关注的热点话题。饮用水是新污染物重要的暴露途径之一,因此评估自来水厂处理工艺对新污染物的去除效果具有重要意义。本文综述了供水领域重点关注的新型消毒副产物(disinfection by-products,DBPs)、全氟和多氟烷基类物质(per-and polyfluoroalkyl substances,PFAS)、药物及个人护理品(pharmaceutical and personal care products,PPCPs)、内分泌干扰物(endocrine disrupting chemicals,EDCs)等新污染物的污染情况,发现我国水环境、水源水及自来水水中均存在不同浓度水平的新污染物且部分区域的风险较高。本文统计了水厂预处理工艺(预臭氧和生物曝气滤池),常规处理工艺(混凝、沉淀、砂滤、消毒)和深度处理工艺(臭氧、活性炭、膜过滤)对新污染物的去除效果,探究了各工艺对新污染物的去除机理,结果表明自来水厂常规工艺对各类新污染物的去除能力都十分有限。总的来说,本文可为供水行业落实新污染物治理行动方案,控制饮用水中新污染物风险,保障饮水健康提供参考。展开更多
基金supported by the National Natural Science Foundation of China(52325001,52170009,and 52091542)the National Key Research and Development Program of China(2021YFC3200700)+3 种基金the Program of Shanghai Academic Research Leader,China(21XD1424000)the International Cooperation Project of Shanghai Science and Technology Commission(20230714100)the Key-Area Research and Development Program of Guangdong Province(2020B1111350001)Tongji University Youth 100 Program.
文摘Tracing the contamination origins in water sources and identifying the impacts of natural and human processes are essential for ecological safety and public health.However,current analysis approaches are not ideal,as they tend to be laborious,time-consuming,or technically difficult.Disinfection byproducts(DBPs)are a family of well-known secondary pollutants formed by the reactions of chemical disinfectants with DBP precursors during water disinfection treatment.Since DBP precursors have various origins(e.g.,natural,domestic,industrial,and agricultural sources),and since the formation of DBPs from different precursors in the presence of specific disinfectants is distinctive,we argue that DBPs and DBP precursors can serve as alternative indicators to assess the contamination in water sources and identify pollution origins.After providing a retrospective of the origins of DBPs and DBP precursors,as well as the specific formation patterns of DBPs from different precursors,this article presents an overview of the impacts of various natural and anthropogenic factors on DBPs and DBP precursors in drinking water sources.In practice,the DBPs(i.e.,their concentration and speciation)originally present in source water and the DBP precursors determined using DBP formation potential tests—in which water samples are dosed with a stoichiometric excess of specific disinfectants in order to maximize DBP formation under certain reaction conditions—can be considered as alternative metrics.When jointly used with other water quality parameters(e.g.,dissolved organic carbon,dissolved organic nitrogen,fluorescence,and molecular weight distribution)and specific contaminants of emerging concern(e.g.,certain pharmaceuticals and personal care products),DBPs and DBP precursors in drinking water sources can provide a more comprehensive picture of water pollution for better managing water resources and ensuring human health.
文摘Correction to:Front.Environ.Sci.Eng.2024,18(9):117 The authors regret that there are some mistakes in Fig.3 and Section 3.2 in text of the original version of the above article.The units of the vertical axis in Fig.3 should be corrected fromμg/L to ng/L.The correct picture appears below.Correspondingly,the units in the Section 3.2 the text should also be modified accordingly,and the correct presentation is:3.2 Spatiotemporal distribution characteristics of antibiotics The antibiotic contents detected in the water samples collected in December,March,and June are shown in Fig.3.Sulfonamide antibiotics were the most frequently detected antibiotics in the water samples,it was also closely related to the widespread use of sulfonamides.
文摘Today, various traditional country foods are increasingly being neglected as a result of modernisation. Consequently, the knowledge and know-how necessary to prepare those foods are strongly threatened. To safeguard and foster appreciation of traditional knowledge, this study aims, on the one hand, to describe the manufacturing process of an alcoholic drink called “Mbite”. The latter is traditionally prepared with the fruits of Sclerocarya birrea (A. Rich) Hostcht in Senegal. On the other hand, various controlled fermentations have been tested for better control of their hygienic and sanitary qualities. The manufacturing of “Mbite” drink begins with a manual extraction of the juice using stems of Guiera senegalensis or Combretum glutinosum to facilitate the separation of the pericarp from the almond. Subsequently, the extracts are filtered and/or mixed according to the producers. Finally, a 2-day spontaneous fermentation by endogenous yeasts of the fruit makes it possible to obtain the alcoholic drink within 3 days. “Mbite” is a low acid drink with a pH ranging from 3.82 to 3.97 and its ethanol content varies from 2 to 4% (v/v). Polyphenols vary between 124.92 and 158.25 mg/100 mL. However, microbiological analyses have shown a high number of lactic acid bacteria involved in the formation of volatile acids. The controlled fermentation trials have resulted in a unique alcoholic fermentation of Sclerocarya birrea juices by selected strains of Saccharomyces cerevisae. This has the advantage of guaranteeing sanitary qualities and reducing the fermentation time from three days to one.
文摘Background: The restrictive lockdown measures that were introduced as a response to the COVID-19 pandemic imposed constraints that affected university students’ drinking habits and mental health. Methods: The current study evaluated the rate of binge drinking among university students as they returned to normal life post-lockdown and whether binge drinking affected their mental health and quality of life. A cross-sectional study included 1382 university students (18 - 24 years) of one private Southwestern university in Brazil. Alcohol Use Disorders Identification, the Beck Depression Inventory-II, and the World Health Organization Quality of Life Brief were used. Data were collected after the COVID-19 pandemic lockdown period (from October 2021 to May 2022). Results: 52.6% of the students reported binge drinking, and 35.6% reported symptoms of depression. Binge drinkers were 1.41 times more likely to experience depressive symptoms when compared with non-binge drinkers, and binge drinking was a risk factor for lower quality of life in all three domains (physical, psychological and environmental). Conclusion: Our study highlights an increased prevalence of binge drinking in university students after the pandemic lockdown. The rise in binge drinking rates was linked to depressive symptoms and worsening of quality of life.
基金financially supported by the National Natural Science Foundation of China(52100015)the Zhejiang Provincial Natural Science Foundation of China(LQ22E080018)the China Postdoctoral Science Foundation(2021M692860).
文摘Ice pigging is an emerging technique for pipe cleaning in drinking water distribution systems.However,substantial confusion and controversy exist on the potential impacts of ice pigging on bulk water quality.This study monitored the microstructural features and composition of sediments and microbial community structures in bulk water in eight multimaterial Chinese networks.Chloride concentration analysis demonstrated that separate cleaning of pipes with different materials in complex networks could mitigate the risk of losing ice pigs and degrading water quality.The microstructural and trace element characterization results showed that ice pigs would scarcely disturb the inner surfaces of long-used pipes.The bacterial richness and diversity of bulk water decreased significantly after ice pigging.Furthermore,correlations were established between pipe service age,temperature,and chloride and total iron concentrations,and the 15 most abundant taxa in bulk water,which could be used to guide practical ice pigging operations.
文摘Drinking good quality water is essential for better health. It is therefore essential to assess the radiological quality of all water consumed in the District of Abidjan in order to prevent related hazards. Thus, the objective of this study was to assess the risk of cancer due to the ingestion of alpha and beta emitting radionuclides in the different types of water consumed in the region. A total of 63 water samples with 43 tap water samples, 5 bottled mineral water and 15 sachet water samples was collected and taken to GAEC laboratory for analysis. The low background Gas-less Automatic Alpha/Beta counting system (Canberra iMatic<sup>TM</sup>) was used to determine alpha and beta activity concentrations. Activity concentrations of both gross alpha and gross beta obtained in water sample were respectively lower than the WHO recommended limits of 0.1 Bq/l and 1 Bq/l. Also, the annual effective dose and total equivalent effective dose found in mineral bottled water samples were higher than in other types of water. The assessment of radiological lifetime risk has shown values of cancer risk due to ingestion alpha and beta emitters lower than recommended limit. These results indicate that there is no health hazard associated to consumption of water in the District of Abidjan.
文摘With the population growth through natural growth and migration,coupled with the city expansion,it is the fact that Dehradun City in India faces severe water scarcity.Therefore,the Song Dam Drinking Water Project(SDDWP)is proposed to provide ample drinking water to Dehradun City and its suburban areas.This paper examined economic significance and environmental impacts of the SDDWP in Garhwal Himalaya,India.To conduct this study,we collected data from both primary and secondary sources.There are 12 villages and 3 forest divisions in the surrounding areas of the proposed dam project,of which 3 villages will be fully submerged and 50 households will be affected.For this study,50 heads of the households were interviewed in the 3 submerged villages.The questions mainly focused on economic significance,environmental impacts,and rehabilitation issues of the dam project.The findings of this study indicate that economic significance of the dam project is substantial,including providing ample water for drinking and irrigation,contributing to groundwater recharge,creating job opportunities,and promoting the development of tourism and fisheries in the Doon Valley.In terms of the rehabilitation of the affected people,there are only 50 households in need of rehabilitation.Currently,the arable land of these affected people is not sufficient to sustain their livelihoods.The entire landscape is fragile,rugged,and precipitous;therefore,the affected people are willing to rehabilitate to more suitable areas in the Doon Valley.Moreover,it is essential to provide them with sufficient compensation packages including the compensation of arable land,houses,cash,common property resources,institutions,belongingness,and cultural adaptation.On the other hand,the proposed dam project will have adverse environmental impacts including arable land degradation,forest degradation,loss of fauna and flora,soil erosion,landslides,and soil siltation.These impacts will lead to the ecological imbalances in both upstream and downstream areas.This study suggests that the affected people should be given sufficient compensation packages in all respects.Afforestation programs can be launched in the degraded areas to compensate for the loss of forest in the affected areas.
文摘新污染物(emerging contaminants)概念于2001年首次被国外学者提出,目前已经成为全球环境和市政领域关注的热点话题。饮用水是新污染物重要的暴露途径之一,因此评估自来水厂处理工艺对新污染物的去除效果具有重要意义。本文综述了供水领域重点关注的新型消毒副产物(disinfection by-products,DBPs)、全氟和多氟烷基类物质(per-and polyfluoroalkyl substances,PFAS)、药物及个人护理品(pharmaceutical and personal care products,PPCPs)、内分泌干扰物(endocrine disrupting chemicals,EDCs)等新污染物的污染情况,发现我国水环境、水源水及自来水水中均存在不同浓度水平的新污染物且部分区域的风险较高。本文统计了水厂预处理工艺(预臭氧和生物曝气滤池),常规处理工艺(混凝、沉淀、砂滤、消毒)和深度处理工艺(臭氧、活性炭、膜过滤)对新污染物的去除效果,探究了各工艺对新污染物的去除机理,结果表明自来水厂常规工艺对各类新污染物的去除能力都十分有限。总的来说,本文可为供水行业落实新污染物治理行动方案,控制饮用水中新污染物风险,保障饮水健康提供参考。
