scholarly journals Occurrence and fate of 27 triazines and metabolites within French drinking water treatment plants

2018 ◽  
Vol 19 (2) ◽  
pp. 463-471 ◽  
Author(s):  
Amélie Guillon ◽  
Christyne Videloup ◽  
Clara Leroux ◽  
Héloïse Bertin ◽  
Marc Philibert ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Surface Waters ◽  
Drinking Water Treatment ◽  
Efficient Removal ◽  
Water Treatment Plants ◽  
Best Available Technology ◽  
Available Technology ◽  
Over Time ◽  
Advanced Drinking Water Treatment

Abstract Twenty-seven triazines and metabolites were screened throughout six advanced drinking water treatment plants (DWTP) in France and their respective resources. Seven molecules were quantified in raw waters with a maximum concentration of 91 ng/L reached for desethyl-atrazine. No metabolites generated through advanced degradation pathways were quantified. Concentration profiles for five DWTP treating ground or surface waters were very similar and remained stable over time. Only one DWTP treating groundwater presented differences between sampling periods due to variations in wells' operations. As expected, most treatment units (settling, ozonation, nitrification, sand filtration, chlorination) did not allow for efficient removal of these micropollutants. Adsorption on granular or powdered activated carbon (PAC) was highlighted as the best available technology for the majority of quantified compounds. Combined PAC and ultrafiltration treatment was especially adapted for the removal of hydroxy-atrazine, one of the most refractory components evaluated during this study. Indeed, among quantified pesticides, only hydroxy-atrazine and desethyl-deisopropyl-atrazine were measured in treated water, with concentrations below 12 ng/L.

Enhanced particle removal in drinking water treatment plants – case studies

2000 ◽  
Vol 41 (7) ◽  
pp. 135-142
Author(s):  
P. Lipp ◽  
G. Baldauf
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Case Studies ◽  
Surface Waters ◽  
Drinking Water Treatment ◽  
Particle Removal ◽  
Water Production ◽  
Water Treatment Plants ◽  
Drinking Water Production

Measurements of parasites in surface waters in Germany showed that their presence is widely spread. Concentrations may reach values up to a maximum of 50 cysts per 100 l. Normally raw waters used for drinking water production show much lower values. In order to ensure sufficient parasite removal in drinking water treatment plants an enhancement of particle removal is required. For filtration processes parameters influencing particle removal are filter media, filtration velocity, flocculant dosage, preozonationand filter back wash. Moderate filtration conditions show best results. Three case studies show that preozonation, optimized energy input and use of flocculants improve particle removal. One case study shows results of the first ultrafiltration plant in Germany treating reservoir and spring water for drinking water production.

scholarly journals Identification of Microplastics in Conventional Drinking Water Treatment Plants in Tehran, Iran

2021 ◽  
Author(s):  
Danial Adib ◽  
Roya Mafigholami ◽  
Hossein Tabeshkia
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Surface Waters ◽  
Wastewater Treatment Plants ◽  
Drinking Water Treatment ◽  
High Importance ◽  
Water Treatment Plants ◽  
Emerging Pollutant ◽  
Average Abundance ◽  
The City

Abstract The presence of microplastics (MPs), as an emerging pollutant is a growing concern in different water resources. These particles are recognized as less than 5 mm in size. Most of the studies have been carried out in surface waters and wastewater treatment plants (WWTPs), but there are few studies on MPs in drinking water treatment plants (DWTPs). This study investigates these particles in three different conventional DWTPs in the city of Tehran, Iran and aims to analyze these particles down to the size of 1 µm. A scanning electron microscope (SEM) was utilized in this study to quantitatively analyze MPs. Accordingly, the average abundance of MPs in raw and treated water samples varied from 1996±268 to 2808±80 MPs L-1 and 971±103 to 1401±86 MPs L-1, respectively. While particles smaller than 10 µm comprised 65-87% of MPs. Moreover, µ-Raman spectroscopy was used to characterize MPs. As the results, polypropylene (PP), polyethylene terephthalate (PET), and polyethylene (PE) were the most abundant identified polymers among MPs comprising more than 53% of particles. Additionally, MPs were categorized as fibers, fragments and spheres. This study fills the knowledge gap of MPs presence in Tehran DWTPs which is of high importance since they supply drinking water for more than 8 million people and investigates the performance of conventional DWTPs in removing MPs.

Drinking Water Surveillance Program in the St. Clair-Detroit River Area 1985/86

1986 ◽  
Vol 21 (3) ◽  
pp. 447-459 ◽  
Author(s):  
K.J. Roberts ◽  
R.B. Hunsinger ◽  
A.H. Vajdic
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Drinking Water Treatment ◽  
Surveillance Program ◽  
Sampling Protocol ◽  
Detroit River ◽  
Water Treatment Plants

Abstract The Drinking Water Surveillance Program (DWSP), developed by the Ontario Ministry of the Environment, is an assessment project based on standardized analytical and sampling protocol. This program was recently instituted in response to a series of contaminant occurrences in the St. Clair-Detroit River area of Southwestern Ontario. This paper outlines the details and goals of the program and provides information concerning micro-contaminants in drinking water at seven drinking water treatment plants in Southwestern Ontario.

Nuclear Magnetic Resonance Enables Understanding of PolyDiallyldimethyl Ammonium Chloride Composition and N-Nitrosodimethylamine Formation During Chloramination

2021 ◽  
Author(s):  
Samantha Donovan ◽  
Ariel Jasmine Atkinson ◽  
Natalia Fischer ◽  
Amelia E Taylor ◽  
Johann Kieffer ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Drinking Water ◽  
Water Treatment ◽  
Magnetic Resonance ◽  
Ammonium Chloride ◽  
Drinking Water Treatment ◽  
Water Treatment Plants ◽  
Nuclear Magnetic

PolyDiallyldimethyl Ammonium Chloride (PolyDADMAC) is the most commonly used polymer at drinking water treatment plants and has the potential to form nitrosamines, like N-Nitrosodimethylamine (NDMA), if free polymer is present...

Occurrence of pathogenic microorganisms in the Saint Lawrence River (Canada) and comparison of health risks for populations using it as their source of drinking water

2000 ◽  
Vol 46 (6) ◽  
pp. 565-576 ◽  
Author(s):  
Pierre Payment ◽  
Aminata Berte ◽  
Michèle Prévost ◽  
Bruno Ménard ◽  
Benoît Barbeau
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Drinking Water Treatment ◽  
Fecal Coliforms ◽  
Giardia Infection ◽  
Bacterial Indicators ◽  
Treatment Practices ◽  
Water Treatment Plants ◽  
Wide Range ◽  
Annual Risk

A 300-km portion of the Saint Lawrence hydrological basin in the province of Québec (Canada) and 45 water treatment plants were studied. River water used by drinking water treatment plants was analyzed (6-L sample volumes) to determine the level of occurrence of bacterial indicators (total coliforms, fecal coliforms, and Clostridium perfringens) and pathogens (Giardia lamblia, Cryptosporidium, human enteric viruses). Pathogens and bacterial indicators were found at all sites at a wide range of values. Logistic regression analysis revealed significant correlations between the bacterial indicators and the pathogens. Physicochemical and treatment practices data were collected from most water treatment plants and used to estimate the level of removal of pathogens achieved under cold (0°C-4°C) and warm (20°C-25°C) water temperature conditions. The calculated removal values were then used to estimate the annual risk of Giardia infection using mathematical models and to compare the sites. The estimated range of probability of infection ranged from 0.75 to less than 0.0001 for the populations exposed. Given the numerous assumptions made, the model probably overestimated the annual risk, but it provided comparative data of the efficacy of the water treatment plants and thereby contributes to the protection of public health.Key words: public health, drinking water, health risk, pathogen occurrence.

Sign in / Sign up

Export Citation Format

Share Document