A Technique for the Rapid Extraction of Radon-222 from Water Samples and a Case Study

2020 ◽  
pp. 271-281
Author(s):  
William M. Berelson ◽  
Douglas E. Hammond ◽  
Andrew D. Eaton
Keyword(s):  
Water Samples ◽  
Rapid Extraction

scholarly journals Iron in Well Water: Case Study in Dulalowo and Heledulaa Districts

2020 ◽  
Vol 2 (2) ◽  
pp. 46-52
Author(s):  
Hendri Iyabu ◽  
Anita Muhammad ◽  
Jafar La Kilo ◽  
Akram La Kilo
Keyword(s):  
Water Samples ◽  
Iron Concentration ◽  
Well Water ◽  
Iron Level ◽  
Water Determination ◽  
Drinking Water Standard ◽  
Water Wells ◽  
Fe Content

This study aims to determine the iron content of water wells in Dulalowo and Heledulaa, Gorontalo City. Ten well water samples were taken randomly from five different wells in each district. Water samples at each well consist of top, middle, and bottom water. Determination of iron level using Atomic Absorption Spectrophotometer (AAS) at a wavelength of 248.33 nm. The results showed that the iron concentration of well water in Dulalowo was 0.030 (D1), 0.265 (D2), 0.224 (D3), 0.158 (D4), 0.149 ppm (D5). Meanwhile, iron levels in Heledulaa were 0.100 (H1), 0.039 (H2), 0.159 (H3), 0.198 (H4), and 0.235 ppm (H5). These results prove that the Fe content in the well water in the two districts is still fulfil the drinking water standard which is a maximum of 0.3 mg/L iron.

scholarly journals Quality changes of drinking water in the water supply network (case study from Lithuania)

2009 ◽  
Vol 41 (2) ◽  
pp. 109-118
Author(s):  
Marina Valentukeviciene ◽  
Aukse Amosenkiene ◽  
Regimantas Dauknys
Keyword(s):  
Drinking Water ◽  
Water Supply ◽  
Water Samples ◽  
Water Distribution ◽  
Quality Changes ◽  
Supply Network ◽  
Water Supply Network ◽  
Well Field ◽  
Drinking Water Distribution

Quality changes of drinking water in the water supply network (case study from Lithuania) The purpose of this research was to examine water quality changes by distributing in to the water supply network. Water samples were collected from Varena town (Lithuania) drinking water distribution system fed by groundwater from well field. Parameters related to undesirable increasing of nitrites and nitrates concentrations have been measured considering these samples: pH, conductivity, concentration of total iron, manganese, ammonium, nitrates and nitrites. Results showed that groundwater from well field were extremely susceptible to favor bacterial growth in the pipelines. The occurrence of nitrites and nitrates in drinking water samples correlated positively with the lengths of old iron pipelines and negatively with the content of newly laid pipelines. The obtained results also showed that the potential nitrates increasing induced by the distribution of treated water could be reduced if: nitrates levels were below detection limits at the outlet of the water treatment plant; biological ammonium removal treatment implementation should reduce the levels of the nitrates and nitrites of the treated supplied water. Although the nitrates concentration increase in drinking water distribution systems, the issues with nitrites accumulation are rare in Lithuania. However, such processes still need to be proved in more extensive investigation, but these research results could be applied as a basic scenario.

scholarly journals The impact of coal ash and slag dump on the quality of surface and ground waters - a case study

2019 ◽  
Vol 84 (5) ◽  
pp. 527-530
Author(s):  
Ivana Cipranic ◽  
Radmila Markovic ◽  
Stefan Djordjievski ◽  
Zoran Stevanovic ◽  
Marija Stevanovic
Keyword(s):  
Water Samples ◽  
Coal Ash ◽  
Negative Influence ◽  
Physical Treatment ◽  
Physical Chemical ◽  
Quality Of Water ◽  
Slag Dump ◽  
The Impact

This paper presents the assessment of the impact of coal ash and slag from the ?Maljevac? dump on the quality of water of Paleski Creek, Montenegro. The obtained results confirm the negative influence of surface and groundwater from the dump on the water from the Paleski Creek. The results obtained by testing of the water samples, collected from Paleski Creek upstream of the dump, indicate that the water is qualified to be used for drinking, after simple physical treatment and disinfection. The results obtained for the water samples collected from the Paleski creek downstream from the dump indicate that the water could be safe for drinking only after the treatment that requires an intensive physical, chemical and biological processing, including some extended treatment.

scholarly journals Preparation of magnetic mesoporous carbon from polystyrene-grafted magnetic nanoparticles for rapid extraction of chlorophenols from water samples

RSC Advances ◽  
2017 ◽  
Vol 7 (20) ◽  
pp. 11921-11928 ◽  
Author(s):  
Shan Xue ◽  
Chaozhan Wang ◽  
Yinmao Wei
Keyword(s):  
Magnetic Nanoparticles ◽  
Water Samples ◽  
Carbon Material ◽  
Mesoporous Carbon ◽  
Rapid Extraction ◽  
Mesoporous Carbon Material ◽  
Magnetic Mesoporous Carbon

A magnetic mesoporous carbon material (Fe3O4@C) was fabricated by carbonizing polystyrene grafted polydopamine-coated magnetic nanoparticles.

scholarly journals Harvested Rainwater Quality: A Case Study Of Aule In Akure, South Western Nigeria

2016 ◽  
Vol 12 (11) ◽  
pp. 451
Author(s):  
Ochuko Mary Ojo
Keyword(s):  
Water Sample ◽  
Water Samples ◽  
Total Coliform ◽  
Rain Water ◽  
World Health ◽  
Well Water ◽  
Storage Tanks ◽  
Health Organization

The quality of harvested rainwater in Aule area of Akure, South western Nigeria was assessed in this study. Water samples were collected from 25 rain water storage tanks within the study area and a well was used as a control. The water samples were subjected to detailed laboratory analysis and the results obtained was compared with World Health Organization (WHO) standard for drinking water. The turbidity values ranged from 2.7 to 9.1 NTU for the harvested rainwater samples while the well water sample had a turbidity of 2.3 NTU. The conductivity values for the rainwater samples ranged from 101 to 1328 Ωs/cm. The conductivity value was lower in the well water (164 Ωs/cm) than in most of the harvested rain water samples. The pH of the harvested rainwater ranged from 6.1 to 7.4 with 36 % of the water samples having a pH less than the WHO minimum limit of 6.5. The pH of the well water sample was 7.4 and was within the WHO acceptable limits of 6.5 to 8.5. All the sampled rainwaters and well water had bacteria in them. The total bacterial content of the rain water samples ranged from 05 to 28 CFU/100 mL, while that of the well was 05 CFU/100 mL. The total coliform contents of the rainwater samples ranged from 03 to 18 CFU/100 mL, while that of the well was 02 CFU/ 100 mL. Based on the results obtained from this study, it is recommended that harvested rainwater be treated to kill contaminating microorganisms and to reduce the health risks associated with its consumption.

scholarly journals Trace Metal Flux in Water of Buriganga River: A GIS Approach

2012 ◽  
Vol 47 (1) ◽  
pp. 9-18 ◽  
Author(s):  
M. Moniruzzaman ◽  
B. Saha ◽  
M. S. Shahariar
Keyword(s):  
Heavy Metals ◽  
Drinking Water ◽  
Trace Metals ◽  
Water Samples ◽  
Permissible Limit ◽  
Sampling Points ◽  
Heavy Metals Contamination ◽  
Metal Flux ◽  
Buriganga River

The objective of the study was to explore the seasonal variations in the water of Buriganga River with respect to heavy metals contamination. Water samples were collected six times with an interval of two months starting from June 2010 to April 2011. Collection of samples started at the point of 90o20´12"E and 23o46´25"N, continued towards downstream at an interval of 1 km upto 26 km by using GPS and ended at the point of 90o27'36"E and 23o37'50"N. The spatial database of the collected water samples were built with ARCGIS 9.3.1 as the platform of case study of Buriganga River. Six trace metals viz. cadmium (Cd), iron (Fe), zinc (Zn), chromium (Cr), copper (Cu) and lead (Pb) were analyzed for water from each sampling points to examine the level of contamination whether it exceed or within the permissible limit. The concentrations of trace metals in water samples were determined using atomic absorption spectrophotometer. The concentration range of these trace metals were found 0 to 0.01 mg/L for Cd, 0.46 to 1.19 mg/L for Fe, 0 to 0.38 mg/L for Zn, 0 to 0.074 mg/L for Cu, 0 to 0.098 mg/L for Cr and 0 to 0.074 mg/L for Pb. The study suggested that, concentration of Fe, Cr and Cd in river water were increased during dry season and in some points near Hazaribagh, Zinzira and Sadarghat it crossed the maximum permissible limit for drinking water purposes and irrigation water supply.DOI: http://dx.doi.org/10.3329/bjsir.v47i1.10712 Bangladesh J. Sci. Ind. Res. 47(1), 9-18, 2012 

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