scholarly journals The age, distribution, and geochemical characteristics of groundwater in the Ordovician limestone aquifer in the Huaibei coalfield, China

2017 ◽  
Vol 12 (2) ◽  
pp. 354-362
Author(s):  
Song Chen ◽  
Herong Gui
Keyword(s):  
Major Ions ◽  
Groundwater Age ◽  
Age Distribution ◽  
Mean Values ◽  
Limestone Aquifer ◽  
Ordovician Limestone ◽  
Groundwater Samples ◽  
Huaibei Coalfield ◽  
Mining Districts ◽  
Δd And Δ18o

In this study, we collected 22 groundwater samples and supporting measurements from different coal-mining districts in the Huaibei coalfield to examine the age, hydro-chemical characteristics, and evolution of groundwater in the Ordovician limestone aquifer (OA). We determined the groundwater concentrations of major ions, stable isotopes (hydrogen and oxygen) and a radio isotope (14C). All the samples were alkaline in nature, and had pH values between 7.10 and 10.80. The total dissolved solids (TDS) contents varied from 119 to 2,443 mg/l. The concentrations of δD and δ18O in groundwater varied from −64.32‰ to −42.76‰, and from −8.62‰ to −5.40‰, with mean values of −56.38‰ and −7.62‰, respectively. The groundwater at OA is recharged by rainfall or surface water, and, because of either the long residence time or runoff into the aquifer, is influenced by water-rock interactions. The age of the groundwater in the OA ranged from 2,660a to 10,040a, and the groundwaters were youngest and oldest in the Renlou and Yangzhuang coal mines, respectively. Contour diagrams of TDS in groundwater, the groundwater age, and the spatial distribution of the water types indicated that the Renlou and Yangzhuang mines were the recharge and discharge areas, respectively.

scholarly journals The geochemical (alkaline earth) characteristics of groundwater in the Taiyuan Formation limestone aquifer in Huaibei coalfield

2018 ◽  
Vol 14 (1) ◽  
pp. 217-228
Author(s):  
Song Chen ◽  
Herong Gui
Keyword(s):  
Alkaline Earth ◽  
Major Ions ◽  
Alkaline Earth Metals ◽  
Limestone Aquifer ◽  
Ph Values ◽  
Taiyuan Formation ◽  
Alkaline Earth Elements ◽  
Groundwater Samples ◽  
Huaibei Coalfield ◽  
Mining Districts

Abstract To understand the characteristics and distribution of alkaline earth elements in groundwater in the Taiyuan Formation limestone aquifer in Huaibei coalfield, 29 groundwater samples were collected, and the concentrations of major ions and alkaline earth metals (beryllium, barium and strontium) determined. The results show that the groundwater is alkaline, with the sample pH values between 7.40 and 10.10. The total dissolved solids (TDS) concentration in the samples was between 123 and 5,520 mg/l. The concentration ranges of Be, Ba and Sr are 0.0001 to 0.03 μg/l, 2.43 to 215.21 μg/l, and 13.08 to 18,168.5 μg/l, respectively. The major ions are mainly controlled by carbonate dissolution, with some ion exchange. The Be content is influenced mainly by pH, while the Sr has the same source as Ca and Mg. A concentration contour diagram for groundwater TDS and Sr can be used to identify groundwater runoff conditions. The Zhahe and Suixiao coal-mining districts are the main groundwater recharge areas, and Linhuan district the discharge area. The Sr/Mg and Sr/Ca ratios are highest where the groundwater residence time in the aquifer is longest. The two highest Sr/Ca ratios are 340.1 and 116.6, and occur in the Haizi and Yuanyi coalmines, respectively, suggesting that groundwater residence times are long in them.

scholarly journals Hydrochemical characteristics and water quality evaluation of shallow groundwater in Suxian mining area, Huaibei coalfield, China

2020 ◽  
Vol 7 (4) ◽  
pp. 825-835
Author(s):  
Hao Yu ◽  
Herong Gui ◽  
Honghai Zhao ◽  
Meichen Wang ◽  
Jun Li ◽  
...  
Keyword(s):  
Water Quality ◽  
Major Ions ◽  
Shallow Groundwater ◽  
Mining Area ◽  
Water Quality Evaluation ◽  
Groundwater Samples ◽  
Silicate Dissolution ◽  
Huaibei Coalfield ◽  
Main Factor

AbstractThe aim of this study is to evaluate the hydrogeochemical characteristics and water environmental quality of shallow groundwater in the Suxian mining area of Huaibei coalfield, China. The natural formation process of shallow groundwater in Suxian is explored using Piper trilinear charts and Gibbs diagrams, and by examining the ratios between the major ions. United States Salinity Laboratory (USSL) charts, Wilcox diagrams, and the water quality index (WQI) are further employed to quantify the differences in water quality. The results reveal that the main hydrochemical facies of groundwater are HCO3–Ca, and that silicate dissolution is the main factor controlling the ion content in shallow groundwater. The USSL charts and Wilcox diagrams show that most of the water samples would be acceptable for use in irrigation systems. The WQI results for each water sample are compared and analyzed, and the quality of groundwater samples around collapse ponds is found to be relatively poor.

Heavy metals in coal mine groundwater responding to mining activity: concentration, temporal variation and speciation

2015 ◽  
Vol 10 (2) ◽  
pp. 390-401 ◽  
Author(s):  
He-rong Gui ◽  
Man-li Lin ◽  
Wei-hua Peng
Keyword(s):  
Heavy Metals ◽  
Temporal Variation ◽  
Coal Mine ◽  
Dominant Species ◽  
Major Ions ◽  
Mining Activity ◽  
Atmospheric Environment ◽  
Limestone Aquifer ◽  
Groundwater Samples ◽  
Representative Samples

Six groundwater samples were collected from four aquifers in Renlou coal mine, northern Anhui Province, China, and concentration, temporal variation and speciation of five heavy metals (Cr, Cu, Ni, Pb and Zn) were analyzed. The results of physicochemical parameters and major ions showed that the selected groundwater were representative samples of Quaternary aquifer (QA), coal measure aquifer (CA), Taiyuan limestone aquifer (TA) and Ordovician limestone aquifer (OA). Cr, Ni and Zn increased in the four aquifers from 2002 to 2014, but Pb decreased from 2006 to 2014. Cu concentration increased in QA and TA, but decreased in CA and OA. Although all monitoring results met the standards recommended by WHO and GB5749-2006, Cr and Cu in some groundwater samples exceeded GB/T 14848-93, especially in CA. Soluble metallic hydroxides were the dominant species of heavy metals in QA, while free ions were the main species in TA and OA. Excepted Ni2+ and Zn2+, CuCO3(aq) and PbCO3(aq) were the dominant species of Cu and Pb in CA, respectively, indicating more CO2 had been flooded and dissolved in groundwater from ground atmospheric environment. The enhanced concentration and special dominant species of heavy metals revealed that the ‘closed’ characteristics of CA in Renlou coal mine might have been broken due to coal mining activity.

scholarly journals Hydrogeochemical assessment of groundwater of Igboora Area, Southwestern Nigeria

2020 ◽  
Vol 26 (2) ◽  
pp. 99-106
Author(s):  
O.A. Akanbi ◽  
W. Sanni ◽  
O. Oshin ◽  
A.G. Olatunde
Keyword(s):  
Major Ions ◽  
Chemical Constituents ◽  
Domestic Water ◽  
Southwestern Nigeria ◽  
Mean Values ◽  
The People ◽  
Major Cations ◽  
Groundwater Samples ◽  
Hydrogeochemical Facies ◽  
The Mean

The people of Igboora rely on groundwater for their domestic water supply. A hydrogeochemical study was carried out on twenty-seven  groundwater samples collected from various boreholes across the study area to determine the suitability of the groundwater for drinking purpose. The total dissolve solids (TDS), electrical conductivity (EC) and pH of the water were measured in the field directly, while the concentrations of major ions were done in the laboratory using flame photometry and spectrophotometry methods. The hydrogeochemical facies classes was done with piper plot and the likely enrichment source(s) of the chemical facies were interpreted with Gibbs plot in conjunction with correlation analysis. The results showed that the pH was between 5.0 and 6.7 at an average (av.) of 5.8; TDS ranged from 50 – 280 (av. 183) mg/L and EC was 110 – 560 (av. 373) μS/cm. The concentrations of the major cations in mg/L were: 5 – 105.5 Ca2+, 1 – 11.9 Mg2+, 0 - 95 Na+, 0 – 112 K+, while for anions the ranges were, 9 - 58 HCO3 - , 6.8 – 28.8 CO3 2-, 1.1 – 29.4 SO4 2-, 2.9 – 26 Cl- and 16 – 90.5 for NO3 -. From the mean values, the order of the cationic dominance was Ca2+ > K+ > Na+ > Mg2+ while that of anionic was NO3 -> HCO3 - > CO3 2- > CI- > SO4 2- . The hydrogeochemical facies in the groundwater was  mainly Ca-HCO3 type with minor occurrences of Na-HCO3 and Ca- Na-HCO3 types. Enrichment source of the cationic chemical facies was mainly rock dominated, while that of the anionic were from meteoric and biogenic sources. From the results of correlation analyses, the TDS has direct and positive relationships with most chemical constituents, indicating that the analysed ionic constituents dominated the dissolved solids in the groundwater. The groundwater can be said to be potable except that the water in the boreholes is slightly acidic and nitrate concentration exceeded recommended limit of 50 mg/L in many of the samples.

scholarly journals Isotopic and Hydrochemical Study of Groundwater in an Area Between the Lesser Zab and Tigris River, Northern Iraq

2021 ◽  
Vol 54 (1F) ◽  
pp. 44-50
Author(s):  
Qusai Y. Al-Kubaisi
Keyword(s):  
Stable Isotopes ◽  
Major Ions ◽  
Water Cycle ◽  
Saline Water ◽  
Regression Line ◽  
Local Source ◽  
Vapor Source ◽  
Mean Values ◽  
Tigris River ◽  
Groundwater Samples

Stable isotopes (2H, 18O) in the water cycle can carry all the information about the movement of water molecules, their ratio different from one place to another in rainfall. Stable isotopes are the function of evaporation, relative humidity, temperature and different longitude, latitude and altitude. On this base. A total of 28 water sample (20 samples were analyzed for major ions and 8 samples for stable isotopes) were collected for two periods to study the origin and the type of groundwater in the area between Lesser Zab and the Tigris river The Results indicated that groundwater samples in the study area are brackish saline water and excessively mineralized water. The average groundwater was classified as Mg-Na-Calcium: Cl-Sulfate for two periods. The groundwater samples represent earth alkali with privilege sulfate and chloride according to the piper diagram. The mean values of 18H and 2O in the groundwater sample are -27.7 and -4.9, respectively for the dry period, and -29.8 and -5.2, respectively, for the wet period. The d-excess varies significantly depending on the humidity and temperature at the vapor source. Isotopic analysis of 2H -18O for groundwater in the study area shows that the origin of groundwater in the study area is of meteoric origin from global source and rain from a local source. The downward shifting of the regression line on the 2H-18O diagram indicates that the samples have undergone evaporation events.

Contribution a la rationalisation du reseau qualite de l’eau de la Baie James

1977 ◽  
Vol 12 (1) ◽  
pp. 51-76
Author(s):  
B. Bobée ◽  
D. Cluis ◽  
A. Tessier
Keyword(s):  
Correspondence Analysis ◽  
Major Ions ◽  
Base Station ◽  
Base Stations ◽  
James Bay ◽  
Mean Values ◽  
Multivariate Technique ◽  
Qualité De L’Eau ◽  
Concentration Changes ◽  
The Relationship

Abstract A water quality sampling programme for James Bay territory established in a previous study has been carried out for the Department of Natural Resources of the Province of Quebec. The network is composed of 5 base-stations, sampled every fortnight to determine the variability with time of the parameters and 16 satellite-stations, sampled five times yearly with a view to determine the spatial variability. The data (major ions and certain nutrients) gathered during the 1974–1975 field survey are subjected to an analysis by a multivariate technique (correspondence analysis) in addition to certain classical statistical methods. The latter have shown that the mean values obtained at satellite stations were representative of the annual mean. In addition, the results permit the determination for a given parameter, of the relationship between stations and, for a given station, the relationship between parameters. In both cases, the formulation of predictive equations was attempted. An overall evaluation of the data by correspondence analysis has permitted: - a more precise definition of the qualitative behaviour of the different sub-basins of the James Bay territory and characterization of their waters;- a proof of the existence of gradual concentration changes in both East-West and North-South directions. Within the original objectives of the network, the results of the study have led to the following recommendations: - to continue synchronised samplings;- to transform a base station with a low information content into a satellite station;- to create a new base station in the eastern part of the territory.

Major ion composition and 87Sr/86Sr of groundwater in the coastal Gujarat alluvial plain, India

2021 ◽  
Author(s):  
Abul Qasim ◽  
Satinder Pal Singh
Keyword(s):  
Major Ions ◽  
Alluvial Plain ◽  
Groundwater Salinization ◽  
Narmada River ◽  
Groundwater Samples ◽  
Hydrogeochemical Facies ◽  
Global Warming Scenario ◽  
Marine Influence ◽  
Binary Mixing ◽  
Regional Groundwater

<p>Major ions, Sr concentration, and <sup>87</sup>Sr/<sup>86</sup>Sr have been analyzed in groundwater of the coastal Gujarat Alluvial Plain, collected during monsoon, post-monsoon, and pre-monsoon seasons of 2016–2017. The major objective of this study was to understand the regional groundwater salinization mechanism. In the study area, the groundwater is mostly characterized by Na-Cl facies, with few samples of Ca-Cl, Ca-Mg-Cl, Na-Ca-HCO<sub>3</sub>, and Ca-Mg-HCO<sub>3</sub> types. Whereas, the Narmada and the Tapi river water samples are particularly of Ca-Mg-HCO<sub>3</sub> type. The hydrogeochemical facies evolution (HFE) diagram depicts the coastal groundwater freshening irrespective of the season ruling out the lateral seawater intrusion far inland. However, the <sup>87</sup>Sr/<sup>86</sup>Sr and Br/Cl ratios strongly suggest the modern marine influence on the regional groundwater. In the plot of 1/Sr versus <sup>87</sup>Sr/<sup>86</sup>Sr, most of the groundwater samples fall on the binary mixing line between the seepage groundwater and modern seawater endmembers. Therefore, we suspect that the up-coning of recently trapped seawater by groundwater over-extraction is the most plausible reason for the groundwater salinization, which indicate the vulnerability of the coastal Gujarat alluvial plain to the near future sea ingress under the global warming scenario. A few exceptional groundwater samples far north of the Narmada River show more radiogenic <sup>87</sup>Sr/<sup>86</sup>Sr indicative of silicate weathering.</p>

scholarly journals Study of groundwater contamination and drinking suitability in basaltic terrain of Maharashtra, India through PIG and multivariate statistical techniques

2020 ◽  
Vol 69 (4) ◽  
pp. 398-414 ◽  
Author(s):  
Vasant Wagh ◽  
Shrikant Mukate ◽  
Aniket Muley ◽  
Ajaykumar Kadam ◽  
Dipak Panaskar ◽  
...  
Keyword(s):  
Major Ions ◽  
Principal Component ◽  
World Health ◽  
Quality Data ◽  
Statistical Techniques ◽  
Multivariate Statistical Techniques ◽  
Multivariate Statistical ◽  
Water Quality Data ◽  
Post Monsoon ◽  
Groundwater Samples

Abstract The integration of pollution index of groundwater (PIG), multivariate statistical techniques including correlation matrix (CM), principal component analysis (PCA), cluster analysis (CA) and various ionic plots was applied to elucidate the influence of natural and anthropogenic inputs on groundwater chemistry and quality of the Kadava river basin. A total of 80 groundwater samples were collected and analysed for major ions during pre- and post-monsoon seasons of 2012. Analytical results inferred that Ca, Mg, Cl, SO4 and NO3 surpass the desirable limit (DL) and permissible limit (PL) of Bureau of Indian Standards (BIS) and the World Health Organization (WHO) in both the seasons. The elevated content of total dissolved solids (TDS), Cl, SO4, Mg, Na and NO3 is influenced by precipitation and agricultural dominance. PIG results inferred that 52.5 and 35%, 30 and 37.5%, 12.5 and 20%, 2.5 and 5% groundwater samples fall in insignificant, low, moderate and high pollution category (PC) in pre- and post-monsoon seasons, respectively. PC 1 confirms salinity controlled process due to high inputs of TDS, Ca, Mg, Na, Cl and SO4. Also, PC 2 suggests alkalinity influence by pH, CO3, HCO3 and F content. PIG and statistical techniques help to interpret the water quality data in an easier way.

scholarly journals Assessment of the Nutrients in the Leachate and the Groundwater Quality for Drinking and Farming around the Nkolfoulou Landfill in Yaoundé, Cameroon

2019 ◽  
Vol 2019 ◽  
pp. 1-16
Author(s):  
Gilbert Feuyit ◽  
John Ngolui Lambi ◽  
Estella Njoyim-Tamungang ◽  
Samuel Laminsi
Keyword(s):  
Groundwater Quality ◽  
Major Ions ◽  
Hazard Quotient ◽  
Hazard Index ◽  
Wet Season ◽  
Cancer Risks ◽  
Groundwater Samples ◽  
Standard Set ◽  
Effluent Discharge ◽  
Pollute Groundwater

This study focuses on the assessment of the nutrients in the leachate and the groundwater quality around the Nkolfoulou landfill in Yaoundé known in French as “Centre de Traitement de Déchets (CTD).” Landfilling generates leachate that can pollute groundwater. Leachate along with groundwater samples (n=1+13) was collected in January (long dry season) and May (long wet season) 2014 and explored for various parameters including pH, temperature, EC, turbidity, TDS, TA, TSS, TH, BOD5, COD, Na+, K+, Mg2+, Ca2+, NH4+, NO3−, Cl−, F−, SO42−, PO43−, HCO3−, and colour using standard methods. In the leachate samples, values of TSS (700.2 and 130.2 mg/L), BOD5 (140 mg/L), COD (1350 and 1750 mg/L), NH4+ (82.50 and 39.51 mg/L), NO3− (159.32 and 74.82 mg/L), and Cl− (702.69 and 345.50 mg/L) exceeded the Cameroonian standards for effluent discharge. All the values of pH and some values of turbidity (4.55 and 4.50 NTU) and NH4+ (0.51 and 0.73 mg/L) in the groundwater samples violated the Cameroonian standards for drinking water. Based on the water quality index (WQI), an average of 11.53% of groundwater samples was improper for drinking in both seasons. Based on the parameters assessed, all the samples complied with the standard set for irrigation, poultry, and livestock. The hazard quotient (HQ) and the hazard index (HI) of NO3− and F− for children and adults were <1, and hence, the increased non-cancer risks due to these ions through the drinking of groundwater was low. From the statistical analysis, the Nkolfoulou landfill may not be the main source of major ions to the nearby groundwater.

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