scholarly journals Development and calibration of an integrative passive sampler for monitoring VCM in drinking water networks

2021 ◽  
Author(s):  
Léna Alembik ◽  
Nicolas Mazzella ◽  
Théophile Hemion ◽  
Alain Husson ◽  
Yves Le Gat ◽  
...  
Keyword(s):  
Drinking Water ◽  
Sampling Rate ◽  
Passive Sampler ◽  
Effect Of Temperature ◽  
Public Health Issue ◽  
Vinyl Chloride Monomer ◽  
Water Networks ◽  
Gas Chromatograph ◽  
Sampling Device ◽  
Polyamide Membrane

This paper evaluates the applicability of a new sampling device for monitoring vinyl chloride monomer (VCM) in drinking water networks. This system consists of an adsorbing cartridge filled with a strong adsorbent enclosed between two sheets of polyethylene-polyamide membrane. The passive sampler (PS) combines preconcentration on the cartridge with easy extraction by thermal desorption into a gas chromatograph (GC), coupled with a tandem mass spectrometer (MS/MS). In order to estimate the suitability of the device for this application, samplers were calibrated in a hydraulic pilot under controlled parameters. The influences of temperature, flow velocity and variation of concentration of exposure were then examined. Linear uptake was observed during a VCM exposure of 12 days and the effect of temperature on the sampling rate was evaluated. This sampling device responds to an aquatic environmental contamination and Public Health issue, both by the organic volatile contaminant monitored in this environment, and by the sampling approach, still little used in drinking water networks. It offers a complementary monitoring to the current technique, providing a more representative assessment of the temporal contamination.

scholarly journals Multi-Country Scale Assessment of Available Energy Recovery Potential Using Micro-Hydropower in Drinking, Pressurised Irrigation and Wastewater Networks, Covering Part of the EU

Water ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 899
Author(s):  
Djordje Mitrovic ◽  
Miguel Crespo Chacón ◽  
Aida Mérida García ◽  
Jorge García Morillo ◽  
Juan Antonio Rodríguez Diaz ◽  
...  
Keyword(s):  
Drinking Water ◽  
Northern Ireland ◽  
Energy Recovery ◽  
Large Scale ◽  
Significant Proportion ◽  
Value Added ◽  
Cost Effective ◽  
Net Energy ◽  
Water Networks ◽  
Scale Assessment

Studies have shown micro-hydropower (MHP) opportunities for energy recovery and CO2 reductions in the water sector. This paper conducts a large-scale assessment of this potential using a dataset amassed across six EU countries (Ireland, Northern Ireland, Scotland, Wales, Spain, and Portugal) for the drinking water, irrigation, and wastewater sectors. Extrapolating the collected data, the total annual MHP potential was estimated between 482.3 and 821.6 GWh, depending on the assumptions, divided among Ireland (15.5–32.2 GWh), Scotland (17.8–139.7 GWh), Northern Ireland (5.9–8.2 GWh), Wales (10.2–8.1 GWh), Spain (375.3–539.9 GWh), and Portugal (57.6–93.5 GWh) and distributed across the drinking water (43–67%), irrigation (51–30%), and wastewater (6–3%) sectors. The findings demonstrated reductions in energy consumption in water networks between 1.7 and 13.0%. Forty-five percent of the energy estimated from the analysed sites was associated with just 3% of their number, having a power output capacity >15 kW. This demonstrated that a significant proportion of energy could be exploited at a small number of sites, with a valuable contribution to net energy efficiency gains and CO2 emission reductions. This also demonstrates cost-effective, value-added, multi-country benefits to policy makers, establishing the case to incentivise MHP in water networks to help achieve the desired CO2 emissions reductions targets.

Fluorescence moieties as a surrogate for residual chlorine in three drinking water networks

2021 ◽  
Vol 411 ◽  
pp. 128519
Author(s):  
Tahir Maqbool ◽  
Jiaxing Zhang ◽  
Yanling Qin ◽  
Muhammad Bilal Asif ◽  
Quang Viet Ly ◽  
...  
Keyword(s):  
Drinking Water ◽  
Residual Chlorine ◽  
Water Networks

scholarly journals Reliability importance measures for a health-aware control of drinking water networks

2016 ◽  
Author(s):  
Jean C. Salazar ◽  
Fatiha Nejjari ◽  
Ramon Sarrate ◽  
Philippe Weber ◽  
Didier Theilliol
Keyword(s):  
Drinking Water ◽  
Water Networks

Migration of vinyl chloride monomer (VCM) and additives into PVC bottled drinking water

1997 ◽  
Vol 32 (4) ◽  
pp. 1065-1083 ◽  
Author(s):  
Nabil M. Fayad ◽  
Sami Y. Sheikheldin ◽  
Muhammad H. Al‐Malack ◽  
Aarif H. El‐Mubarak ◽  
Naseem Khaja
Keyword(s):  
Drinking Water ◽  
Vinyl Chloride ◽  
Vinyl Chloride Monomer ◽  
Bottled Drinking Water

SEROPREVALENCE OF HEPATITIS E VIRUS (HEV) INFECTION AMONG PREGNANT WOMEN IN SOUTH INDIA

2021 ◽  
pp. 28-31
Author(s):  
Nivedhitha E ◽  
Selvi R ◽  
Kayalvili KK ◽  
Arul selvan S ◽  
Duraivel M
Keyword(s):  
Drinking Water ◽  
Pregnant Women ◽  
Hepatitis E Virus ◽  
South India ◽  
Educational Status ◽  
Hepatitis E ◽  
Elisa Test ◽  
Public Health Issue ◽  
Water Type ◽  
Mortality And Morbidity

Background: Hepatitis E virus (HEV) infection poses a major public health issue in countries with poor drinking water supply, inadequate rd sanitation and improper disposal of human excretes. It causes fulminant hepatitis in pregnant women during 3 trimester with a high mortality rate of 20-30%. Aim:The aim of the study was to estimate the seroprevalence of HEVinfection among pregnant women in South India. Materials and methods: Atotal of 200 asymptomatic, pregnant women were included in the study was evaluated using a questionnaire form. 5ml of blood samples were collected from them and serum was separated to detect for the presence of HEV-antibodies and HEV-RNA by ELISA test and RT-PCR test respectively. Results: The prevalence of HEV-antibodies was found to be 11.5%. HEV-RNA was not present in any participants. A very high statistical signicance was seen associated with the risk factors such as educational status, source of drinking water, type of toilet system used, and the habit of hand washing after using toilets (P<0.01). Conclusion: Even though the prevalence of HEV among the pregnant women is low, periodic assessment and screening of the pregnant women should be done. Encouraging the public sector to strictly adhere to the personal hygienic measures will denitely have an impact in the maternal as well as perinatal mortality and morbidity

scholarly journals Sampling Rate of Polar Organic Chemical Integrative Sampler (POCIS): Influence Factors and Calibration Methods

2020 ◽  
Vol 10 (16) ◽  
pp. 5548 ◽  
Author(s):  
Liyang Wang ◽  
Ruixia Liu ◽  
Xiaoling Liu ◽  
Hongjie Gao
Keyword(s):  
Organic Pollutants ◽  
Quantitative Methods ◽  
Sampling Rate ◽  
Weighted Average ◽  
Supplementary Information ◽  
Future Application ◽  
Organic Chemical ◽  
Sampling Device ◽  
In Situ Conditions ◽  
Calibration Methods

As a passive sampling device, the polar organic chemical integrative sampler (POCIS) has the characteristics of simple operation, safety, and reliability for assessing the occurrence and risk of persistent and emerging trace organic pollutants. The POCIS, allowing for the determination of time-weighted average (TWA) concentration of polar organic chemicals, exhibits good application prospects in aquatic environments. Before deploying the device in water, the sampling rate (Rs), which is a key parameter for characterizing pollutant enrichment, should be determined and calibrated accurately. However, the Rs values strongly depend on experimental hydrodynamic conditions. This paper provides an overview of the current situation of the POCIS for environmental monitoring of organic pollutants in an aquatic system. The principle and theory of the POCIS are outlined. In particular, the effect factors such as the ambient conditions, pollutant properties, and device features on the Rs are analyzed in detail from aspects of impact dependence and mechanisms. The calibration methods of the Rs under laboratory and in situ conditions are summarized. This review offers supplementary information on comprehensive understanding of mechanism and application of the POCIS. Nevertheless, the Rs were impacted by a combined effect of solute–sorbent–membrane–solution, and the influence extent of each variable was still unclear. On this basis, the ongoing challenges are proposed for the future application of the POCIS in the actual environment, for instance, the need for this device to be improved in terms of quantitative methods for more accurate measurement of the Rs.

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