scholarly journals Dietary High Cholesterol and Trace Metals in the Drinking Water Increase Levels of ABCA1 in the Rabbit Hippocampus and Temporal Cortex

2015 ◽  
Vol 49 (1) ◽  
pp. 201-209 ◽  
Author(s):  
Bernard G. Schreurs ◽  
D. Larry Sparks
Keyword(s):  
Drinking Water ◽  
Trace Metals ◽  
Temporal Cortex ◽  
High Cholesterol ◽  
Rabbit Hippocampus

scholarly journals Significance of building and plumbing specifics on trace metal concentrations in drinking water

1991 ◽  
Vol 18 (6) ◽  
pp. 893-903 ◽  
Author(s):  
Inderjit Singh ◽  
Donald S. Mavinic
Keyword(s):  
Drinking Water ◽  
Trace Metals ◽  
Trace Metal ◽  
Water Samples ◽  
First Flush ◽  
Single Family ◽  
Metal Concentrations ◽  
Building Height ◽  
High Rise ◽  
Family House

Samples were taken from 72 high-rise apartment suites (6 suites in 12 individual high-rise towers) and 60 single-family houses located within the Greater Vancouver Regional District. The influence of the following factors on trace metal concentrations in 1-L first-flush drinking water samples and “running” hot water samples was investigated: building height, location, plumbing age, type of plumbing, and type of building. Results of this survey show that with the exception of building height, all factors had a correlation with one or more of the trace metals investigated. The trace metals examined were lead, copper, iron, and zinc. Lead was influenced primarily by building type, copper by plumbing age and type of plumbing, and iron by location. Elevated lead levels were associated with high-rise samples. New copper plumbing systems resulted in high copper levels. Highest iron levels in the drinking water were measured in the East Vancouver location. Zinc did not show a distinct correlation with any of the factors investigated. Brass faucets were the primary source of zinc in tap water. They also contributed substantially to the lead detected in the 1-L first-flush sample. Metal concentrations measured in the high-rise and house samples were compared with the U.S. Environmental Protection Agency's (USEPA) maximum contaminant levels (MCLs) and the proposed “no-action” level for lead. In high-rise samples, the 0.01 mg/L “no-action” level proposed for lead was exceeded in 43% of the samples, and 62% of the samples exceeded the current 1.0 mg/L MCL standard for copper. In single-family house samples, these values were 47% and 73%, respectively. The average lead concentrations were 0.020 mg/L for all high-rise samples and 0.013 mg/L for house samples. Regulatory levels stated above would still be exceeded in 6% of the cases for lead and 9% of the cases for copper, even after prolonged flushing of the tap in a high-rise building. In all cases associated with single-family houses, flushing the cold water tap for 5 minutes was successful in achieving compliance levels. Key words: aggressive water, compliance, corrosive, drinking water, first-flush, GVRD, high-rise, single-family house, trace metals, USEPA.

scholarly journals Metal Contamination in Ground Water of Dang District

1970 ◽  
Vol 9 ◽  
pp. 143-148 ◽  
Author(s):  
Rajendra K. Mahat ◽  
Rashmi Shrestha
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Trace Metals ◽  
Ground Water ◽  
Atomic Absorption ◽  
Metal Contamination ◽  
Hydride Generation ◽  
Atomic Absorption Spectrophotometry ◽  
Drinking Water Quality ◽  
High Concentration

Drinking water quality in Nepal has been an issue of prevalent concern. So, this study was conducted to visualize the scenario of metal contamination in ground water of Dang district located at central west Terai in Nepal. A total of 523 water samples from tubewells and dugwells positioned in 16 village development committees (VDCs) were tested for arsenic in laboratory using atomic absorption spectrophotometer (AAS) employing continuous flow hydride generation technique. Randomly selected 20 samples were also tested for other heavy and trace metals like Mn, Fe, Cu, and Cd using AAS employing flame method. Of the total samples, 50.3% was found to contain arsenic above WHO drinking water qualty guidelines value of 10 ppb (0.01 mg/l) and 10.7% was found to contain arsenic above national drinking water quality guidelines value of 50 ppb (0.05 mg/l). The safest VDC is Sonpur while the most severely affected VDC is Gobardiha. A highest concentration of As of 240 ppb (0.24 mg/ l) was found in Dhikpur VDC. Ground water in this area seemed to be affected by high concentration of iron up to 11.01 mg/l and of manganese up to 0.51 mg/L. Statistical tools were employed to assess the probable association among metals but no significant correlation could be retrieved. Key words: hydride generation-atomic absorption spectrophotometry; redox conversion; arsenicosis; heavy and trace metals DOI: 10.3126/njst.v9i0.3178 Nepal Journal of Science and Technology 9 (2008) 143-148

scholarly journals Occurrence and Health-Risk Assessment of Trace Metals in Raw and Boiled Drinking Water from Rural Areas of China

Water ◽  
2018 ◽  
Vol 10 (5) ◽  
pp. 641 ◽  
Author(s):  
Junhua Wu ◽  
Yi Man ◽  
Guangyi Sun ◽  
Lihai Shang
Keyword(s):  
Risk Assessment ◽  
Drinking Water ◽  
Trace Metals ◽  
Health Risk ◽  
Health Risk Assessment ◽  
Rural Areas

The Concentrations of Certain Trace Metals in Drinking Water

1944 ◽  
Vol 36 (6) ◽  
pp. 637-644 ◽  
Author(s):  
Robert A. Kehoe ◽  
Jacob Cholak ◽  
Edward J. Largent
Keyword(s):  
Drinking Water ◽  
Trace Metals

Survey of trace metals in drinking water supplied to rural populations in the eastern Llanos of Venezuela

2009 ◽  
Vol 90 (2) ◽  
pp. 752-759 ◽  
Author(s):  
Abrahan Mora ◽  
César Mac-Quhae ◽  
Malvis Calzadilla ◽  
Luzmila Sánchez
Keyword(s):  
Drinking Water ◽  
Trace Metals ◽  
Rural Populations

The use of nutshell carbons in drinking water filters for removal of trace metals

2004 ◽  
Vol 38 (4) ◽  
pp. 1062-1068 ◽  
Author(s):  
Mohamed Ahmedna ◽  
Wayne E Marshall ◽  
Abdo A Husseiny ◽  
Ramu M Rao ◽  
Ipek Goktepe
Keyword(s):  
Drinking Water ◽  
Trace Metals ◽  
Water Filters

scholarly journals Detection of Organochlorine Pesticide (OCPs) Residues and Trace Metals in Some Selected Malt Drinks in Nigeria

Beverages ◽  
2018 ◽  
Vol 4 (3) ◽  
pp. 65 ◽  
Author(s):  
Godwin Olutona ◽  
Sophia Livingstone
Keyword(s):  
Drinking Water ◽  
Trace Metals ◽  
Environmental Protection Agency ◽  
Atomic Absorption Spectrophotometry ◽  
World Health ◽  
Gas Chromatograph ◽  
Protection Agency ◽  
Absorption Spectrophotometry ◽  
Total Burden ◽  
Health Organization

In this study we evaluated the trace metals and toxic residues of pesticides in commercial malta drinks sold in Nigeria markets. Residual concentrations of seventeen (17) chlorinated hydrocarbons and trace metals were determined in fifteen samples of three batches each of five selected brands of Malta drink sold in Nigeria markets. Gas Chromatograph-Electron Capture Detector (GC-ECD) and Atomic Absorption Spectrophotometry (AAS) were employed in quantitative analysis. The results revealed that all the malt drink analyzed have one or more OCPs detected. The presence of eleven (11) OCPs residue were detected at varying concentrations. The total burden of OCPs in the samples was in the following order: AMS > DUB > MAG > HIM > MLT. Trace metals results revealed that Cd was below detection limit in all the samples while Pb; Ni and Cr were above World Health Organization and United State Environmental Protection Agency (WHO/USEPA) limits for drinking water.

Spatial distribution and sources of dissolved trace metals in surface water of the Wei River, China

2013 ◽  
Vol 67 (4) ◽  
pp. 817-823 ◽  
Author(s):  
Li Jing ◽  
Li Fadong ◽  
Liu Qiang ◽  
Song Shuai ◽  
Zhao Guangshuai
Keyword(s):  
Drinking Water ◽  
Trace Metals ◽  
Trace Metal ◽  
Principal Component ◽  
Hierarchical Cluster ◽  
Environmental Data ◽  
Multivariate Statistical ◽  
Drinking Water Standard ◽  
The Impact ◽  
Wei River

For this study, 34 water samples were collected along the Wei River and its tributaries. Multivariate statistical analyses were employed to interpret the environmental data and to identify the natural and anthropogenic trace metal inputs to the surface waters of the river. Our results revealed that Zn, Se, B, Ba, Fe, Mn, Mo, Ni and V were all detected in the Wei River. Compared to drinking water guidelines, the primary trace metal pollution components (B, Ni, Zn and Mn) exceeded drinking water standard levels by 47.1, 50.0, 44.1 and 26.5%, respectively. Inter-element relationships and landscape features of trace metals conducted by hierarchical cluster analysis (HCA) identified a uniform source of trace metals for all sampling sites, excluding one site that exhibited anomalous concentrations. Based on the patterns of relative loadings of individual metals calculated by principal component analysis (PCA), the primary trace metal sources were associated with natural/geogenic contributions, agro-chemical processes and discharge from local industrial sources. These results demonstrated the impact of human activities on metal concentrations in the Wei River.

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