1,723,190 research outputs found
deodara and permafrost soil data set of high altitude
No full textThis is 16s rRNA amplicon sequences obtained by Dr. Ashwani Kumar</p
Assessment of Sulphate and Iron Contamination and Seasonal Variations in the Water Resources of a Damodar Valley Coalfield, India: A Case Study
No full textThe aim of the present study was to assess the sulphate (SO2−4 ) and iron (Fe) contamination and seasonal variations in the water resources (groundwater, surface water, and mine water) of the West Bokaro coalfield region, India. One hundred and twenty-four water resources samples were collected from the coalfield during the post- and pre-monsoon seasons. The concentrations of SO2−4 were determined using ion chromatography and Fe concentrations were analyzed using inductively coupled plasma mass spectrometry. A statistical analysis was used to easily understand the seasonal variations of the elements in the water resources of the area. The concentrations of SO2−4 and Fe in the water resources were higher in the pre-monsoon season than in the post-monsoon season, irrespective of location. The water resources of the coalfield were contaminated with high concentrations of SO2−4 and Fe, and would require suitable treatment before drinking, domestic and industrial uses
Assessment of hydrogeochemical characterization and groundwater quality using geostatistical and gis techniques: A case in the north part of Italy
No full textOne hundred and fifty-six groundwater samples were collected from the Aosta Valley region, Italy and analyzed for pH, electrical conductivity (EC), total dissolved solids (TDS), total hardness (TH), major cations (Ca²⁺, Mg²⁺, Na⁺ and K⁺), major anions (HCO₃¯, F,¯ Cl¯, NO₃¯, SO₄²¯) to evaluate the hydrogeochemical characterization as well as water quality of the area. A geographic information system (GIS) tool was used to study the spatial variation in the groundwater parameters of the study area. The analytical results show slightly acidic to slightly alkaline nature of the groundwater in the study area. The TDS exceed the desirable limit of 500 mg L¯¹ in 43% of the groundwater samples. HCO₃¯ and SO₄²¯ are the dominant anions, while cation chemistry is dominated by Ca²⁺and Mg²⁺. The data plotted on the Piper and Gibbs diagrams as well as statistical analysis reveals that the groundwater chemistry was mainly controlled by rock weathering processes in the study area. Ca²⁺-Mg²⁺-HCO₃¯and Ca²⁺-Mg²⁺-Cl¯ -SO₄²¯ were the dominant hydrogeochemical facies in the groundwater of the study area. For quality assessment, values of analyzed parameters were compared with the World Health Organization (WHO) water quality standard, which shows that the concentrations of TDS, Ca²⁺, SO₄²¯ and TH are exceeding the desirable limits in some water samples. This study could be useful in implementing future measures in groundwater resource management of the area
Assessment of risk to human health due to intake of chromium in the groundwater of the Aosta Valley region, Italy
Full text linkThe aim of this study is to assess the risk to human health presented by total chromium (CrT) and hexavalent chromium (Cr(VI)) due to the intake of the groundwater (shallow aquifer) in the Aosta Valley region. One hundred and fifty-three groundwater samples were collected from seventeen locations in the Aosta Valley region during the years 2007-2015 to determine the CrT and Cr(VI) concentrations. The cancer risk (CR) and non-cancer risk, reflected by the hazard quotient (HQ) were estimated using the United States Environmental Protection Agency methods. The concentrations of CrT exceeded the limit for drinking water established by Italian legislative decree at the sampling location Ao23 in all the years studied. Moreover, Cr(VI) concentrations exceeded the limit for drinking water at many sampling locations in the study area. The estimated HQ values for non-cancer risk suggested that all the sampling locations were well within the safe zone during all the years except for location Ao23 in many years considered. The CR levels were very low to high risk in the groundwater of the study area. The results of this analysis suggest that a suitable treatment of the groundwater is required before its utilization for drinking purposes. This study could be of great value for the prevention of risk to human health and for groundwater resource management
Hydrogeochemical investigation and groundwater quality assessment of Pratapgarh district, Uttar Pradesh
No full textEvaluation of Metal Contamination in the Groundwater of the Aosta Valley Region, Italy
Full text linkOne hundred and sixty-two groundwater samples were collected from eighteen locations of the Aosta Valley region during the years 2007–2015 to determine the concentrations
of Al, As, Ba, Cd, Cr, Cu, Fe, Mn, Ni, Pb, Se,
and Zn. A heavy pollution index (HPI) model was used to
evaluate the metal contamination status in the groundwater
of the study area. Spatial distribution maps of the HPI
values were prepared using a geographic information system
(GIS) technique so that the groundwater quality status
of the area could easily be recognized. The concentrations
of As, Ba, Cd, Cu, Pb, and Zn did not exceed the drinking
water permissible limits for years considered. However, the
concentrations of Al, Cr, Fe, Mn, Ni, and Se were above
the drinking water permissible limits established by the
World Health Organization (WHO 2006). The HPI values
were above the critical pollution index of 100 during the
years 2011 and 2012. The groundwater in this study area
was contaminated with some metals and urgently requires
treatment to control current and future contamination
problems
sj-docx-1-jic-10.1177_08850666231192371 - Supplemental material for Accuracy of International Classification of Disease Coding Methods to Estimate Sepsis Epidemiology: A Scoping Review
No full textSupplemental material, sj-docx-1-jic-10.1177_08850666231192371 for Accuracy of International Classification of Disease Coding Methods to Estimate Sepsis Epidemiology: A Scoping Review by Ashwani Kumar, Naomi Hammond, Sarah Grattan, Simon Finfer and Anthony Delaney in Journal of Intensive Care Medicine</p
Groundwater-level risk assessment by using statistical and geographic information system (GIS) techniques: a case study in the Aosta Valley region, Italy
No full textIn the present study, groundwater-level monitoring has been carried out on 26 observation dug wells in the Aosta Valley region, Italy, during the dry season (June 2013) and wet season (November 2013) in order to assess the water-level fluctuation (WLF). The depth to water level varied from 3.04 to 28.70 metres below ground level (mbgl) in the dry season and from 2.92 to 25.62 mbgl in the wet season. The WLF of the study area varied from 0.01 to 6.80 mbgl, and the western and north-western regions of the study area showed higher WFL. The WLF map was validated with a statistical analysis and elevation value of the area in a geographic information system environment, and this indicated that validation can be accepted for the WLF in the Aosta Valley. The results of the study demonstrated that the eastern region could be considered as a safe and good recharge zone for the groundwater in the Aosta Valley region. The WLF map generated in this study could also be used for the management of future groundwater resources and environmental planning of the area
Evaluation of hydrogeochemical processes and groundwater quality for suitability of drinking and irrigation purposes: a case study in the Aosta Valley region, Italy
Full text linkThe present study aims to discuss the hydrogeochemical processes in the Aosta Valley region and assess the quality of its groundwater for suitability of drinking and irrigation purposes. One hundred twenty-two samples were collected from the Aosta Valley region in the years 2007 and 2008 (61 per year), and analysed for pH, electrical conductivity, total dissolved solids (TDS), total hardness, major cations and anions. The pH of the samples in both years indicated a near-neutral to alkaline nature of the groundwater. The cation and anion chemistry showed the general ionic abundance as: Ca2+ > Mg2+ > Na+ > K+ and HCO3− >SO4 2− >Cl− >NO3− >F− in both years. Ca2+, Mg2+, HCO3− and Ca2+ , Mg2+ ,Cl− , SO4 2− were the dominant hydrogeochemical facies. The computed saturation indices demonstrated that the groundwater was supersaturated with respect to dolomite and calcite in both years. The groundwater chemistry of the study area was mainly controlled by the dissolution of carbonate, sulphate and silicate minerals, as well as ion exchange processes. A comparison of the groundwater quality in relation to drinking water standards showed that most of the water samples were suitable for drinking and domestic uses. The computed water quality index (WQI) values of the study area groundwater ranged from 24 to 84 in the year 2007 and from 22 to 82 in the year 2008, and all the location fell under the Excellent to Good category
- …
