scholarly journals The influence of electrogalvanic device on scaling

2013 ◽  
Vol 11 (5) ◽  
pp. 698-705 ◽  
Author(s):  
Marjana Simonič ◽  
Irena Ban
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Water Samples ◽  
Treatment Method ◽  
Aragonite Crystal ◽  
Physico Chemical ◽  
Before And After ◽  
Drinking Water Samples

AbstractThe use of an electrogalvanic device for scale neutralisation is descibed in this paper. Physico-chemical analyses were performed before and after the treatment. The results were compared with those obtained by using magnetic water treatment device. By measuring some individual parameters and the implementation of chemical analysis, the satisfactory functioning of the electrogalvanic device was demonstrated. The quality of drinking water did not change much after the water treatment method. The results of determination of calcium carbonate saturating index showed that the raw drinking water is in carbonate equlibrium as well as both treated water samples. The calcite/aragonite ratio was studied by means of microscopy and X-ray powder diffraction. Inspection of crystals formed during the experiments with microscopy indicated that aragonite crystal structure of the precipitates prevailed over the calcite stucture. The diffractograms showed that the share of aragonite increased after using the electrogalvanic device compared with raw drinking water samples where the share of calcite was higher.

Gas Chromatographic Determination of Trialkyl/Aryl Phosphates in Drinking Water, Following Isolation Using Macroreticular Resin

1981 ◽  
Vol 64 (4) ◽  
pp. 991-998 ◽  
Author(s):  
Guy L Lebel ◽  
David T Williams ◽  
Frank M Benoit
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Water Samples ◽  
Screening Method ◽  
Chromatographic Determination ◽  
Triethyl Phosphate ◽  
Tricresyl Phosphate ◽  
Water Treatment Plants ◽  
Drinking Water Samples

Abstract An XAD-2 screening method developed previously fororganophosphorus pesticides has been extended to determine trialkyl/aryl phosphates in drinking water at the ng/L level. Recovery studies at 1,10, and 100 ng/L levels were carried out by fortification onto XAD-2 resin and by direct on-stream fortification of drinking water. Recoveries were >70% for tri-nbutyl, tris(2-chloroethyl), tri(2-ethylhexyl), tributoxyethyl, triphenyl, and tricresyl phosphate. Triethyl phosphate recoveries were about 25%. Analysis of drinking water samples collected at 6 eastern Ontario water treatment plants revealed the presence of several trialkyl/aryl phosphates at levels ranging from 0.2 to 75 mg/L.

Determination of Phenolic Compounds from Jimma Drinking Water Using 4-Aminoantipyrine

2020 ◽  
Vol 12 (5) ◽  
pp. 690-694
Author(s):  
Kassahun Dejene Belayneh ◽  
Khalid Siraj ◽  
Mengesha Tigist
Keyword(s):  
Drinking Water ◽  
Phenolic Compounds ◽  
Disease Transmission ◽  
Raw Water ◽  
Treated Water ◽  
Before And After ◽  
Sulfur Containing ◽  
Jimma Town

The quality of drinking water in Ethiopia is an influential environmental factor of health and water can use as a medium for disease transmission in countries on all continents; all are affected from the poorest to the richest. Moreover, in our globe millions of people are unprotected to unsafe concentration of chemical pollutants in the drinking water. Dichlorohenols are considered as key water pollutants that are destructive to creatures at stumpy concentrations and many of them have been clustered as detrimental pollutants because of their probable to damage human health even in low concentration. This research aimed to determine phenolic compounds from drinking water of Jimma town which is found south west of Ethiopia, by using 4-Aminoantipyridine (AAP). The sample of drinking water before and after treatment was collected for determination of pollutants which classified as raw water (RW), treated water (TW) and system distributed water (SDW). The sample of water was preserved by phosphoric acid and sulfuric acid under pH 4 and distillation was carried out in order to remove sulfur containing compounds by addition of CuSO4 solution. In the analysis of water using 4-Aminoantipyrine the treated water and the system distributed water have been contained 2.73 ppb and 3.64 ppb which had more phenolic compounds as compared to raw water of 1.18 ppb. Therefore, the existence of phenolic compound in both treated and system distributed water of Jimma town drinking water has more phenolic compounds as compared to the permissible level of both Ethiopian Standard, 2 ppb and EPA Standards, 1 ppb.

Reduction in Exposure to Lead from Drinking Water and its Effect on Blood Lead Concentrations

1984 ◽  
Vol 3 (5) ◽  
pp. 383-392 ◽  
Author(s):  
J.C. Sherlock ◽  
D. Ashby ◽  
H.T. Delves ◽  
G.I. Forbes ◽  
M.R. Moore ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Water Supply ◽  
Water Samples ◽  
Lead Concentration ◽  
Blood Lead ◽  
Substantial Contribution ◽  
Blood Samples ◽  
Before And After ◽  
Lead Pipes

1 The water supply in Ayr (Scotland, UK) was plumbosolvent and many dwellings in Ayr contained lead pipes. In 1981 treatment of the water supply to reduce its plumbosolvency was initiated. Measurements of water and blood lead concentrations were made before and subsequent to the treatment. Most of the measurements made before and after water treatment began were made on water samples from the same dwellings and blood samples from the same women. 2 Water treatment produced a sharp fall in water lead concentrations and a decrease in the median blood lead concentration from 21 to 13 μg/100 ml. 3 Two women had higher than expected blood lead concentrations, both these women had been removing old paint. 4 Women who had lead pipes removed from their dwellings all showed substantial decreases in their blood lead concentrations. 5 The curvilinearity of the relation between blood lead and water lead concentrations is confirmed. Even relatively low (<40 μg/l) water lead concentrations may make a substantial contribution to blood lead concentrations.

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