A multivariate non-parametric approach for estimating probability of exceeding the local natural background level of arsenic in the aquifers of Calabria region (Southern Italy)

Apollaro, Carmine; Curzio, Diego Di; Fuoco, Ilaria; Buccianti, Antonella; Dinelli, Enrico; Vespasiano, Giovanni; Castrignanò, A.; Rusi, Sergio; Barca, Donatella; Figoli, Alberto; Gabriele, Bartolo; Rosa, R. De

doi:10.1016/j.scitotenv.2021.150345

Cited by 44 publications

(20 citation statements)

References 67 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…High concentrations of Cl − and SO 4 2− and relatively high EC values (up to 1650 µS/cm) in W4 seem to confirm this assumption. The correlation diagram of SO 4 2− vs. HCO 3 − + Cl − (prepared after [41,42]) confirms the distinct chemistry of groundwater from W4 compared to other collected water samples (Figure 4). Moreover, the results plotted on the TIS diagram show that SO 4 2− , although originating from different sources, is not responsible for degradation of the water quality and plays a minor role in the observed total ionic salinity.…”

Section: Discussionsupporting

confidence: 65%

Identification of Water Contamination Sources Using Hydrochemical and Isotopic Studies—The Kozłowa Góra Reservoir Catchment Area (Southern Poland)

Ślósarczyk¹,

Jakóbczyk-Karpierz²,

Witkowski³

2022

Water

View full text Add to dashboard Cite

The application of combined research methods, such as hydrochemical and isotopic analyses, facilitates understanding of the origin of water constituents and migration of contaminants in the aquatic environment. The presented study attempts to identify contamination sources affecting water quality within the Kozłowa Góra reservoir catchment area (southern Poland). A total of 100 water samples were collected from surface water (the Brynica river, streams, and the reservoir) and groundwater (a Quarternary aquifer) in four time periods. During fieldwork, the physicochemical parameters were measured (temperature, pH, electrical conductivity, redox potential, and dissolved oxygen). The chemical analysis included the determination of major ions (HCO3−, SO42−, Cl−, Ca2+, Mg2+, Na+, and K+), nutrients (NO3−, NO2−, NH4+, and PO43−), and total organic carbon. The study was complemented by isotopic analysis of sulphur and oxygen in sulphate, which enabled a more precise identification of stressors affecting water quality in different parts of the catchment area. Chemical and isotopic results (δ34S = 4.38–13.99‰; δ18O 3.59–13.30‰) revealed that wastewater discharges and agricultural activities have a significant influence on the chemistry of the Brynica River and other streams. At some sampling points, a lower quality of water was manifested by elevated concentrations of NO3− (up to 22.6 mg/L) and several other ions (e.g., up to 114 mg/L for Cl−, up to 51.52 mg/L for NH4+, and 12.5 mg/L for PO43−). The quality of groundwater was deteriorated mainly by infiltration of sewage from leaky septic tanks. The level of groundwater contamination varied depending on the location, as higher concentrations of major ions and values of electrical conductivity were observed in residential areas. The Brynica river, streams, and groundwater recharge the drinking water reservoir, and thus its quality depends on these sources. A dilution of water and the presence of biochemical processes led to a reduction of contaminant concentrations in the Kozłowa Góra reservoir (down to 3.5 mg/L for NO3−, 32 mg/L for Cl−, 0.21 mg/L for NH4+, and <0.05 mg/L for PO43−) compared to water in the river and streams supplying the reservoir. The study revealed the role of wastewater discharge and agricultural activities in the evolution of surface water chemistry. The results will be used in further research on the origin and migration of other substances in water, including microcontaminants.

show abstract

Section: Discussionsupporting

confidence: 65%

Identification of Water Contamination Sources Using Hydrochemical and Isotopic Studies—The Kozłowa Góra Reservoir Catchment Area (Southern Poland)

Ślósarczyk¹,

Jakóbczyk-Karpierz²,

Witkowski³

2022

Water

View full text Add to dashboard Cite

show abstract

“…Based on all data collected, the Tertiary volcanic tuffs are the main source for the high arsenic content in the local groundwater. Geological characteristics of rocks and sediments can influence groundwater chemistry [58], and different water-rock interaction models have been used to evaluate the pollution processes [59][60][61]. Because the current work does not include any dissolving test for those arsenic minerals and the tuffs, it is not possible to build a dissolution model for the Sierra del Cuervo volcanic tuffs.…”

Section: As In Groundwatermentioning

confidence: 99%

Arsenic Mineral in Volcanic Tuff, a Source of Arsenic Anomaly in Groundwater: City of Chihuahua, Mexico

2022

View full text Add to dashboard Cite

Arsenic is a naturally occurring trace element that causes many health effects when present in drinking water. Elevated arsenic concentrations in water are often attributed to nearby felsic volcanic sequences; however, the specific rock units to which the groundwater anomalies can be accredited are rarely identified. The groundwater from wells around the city of Chihuahua, Mexico, contains high arsenic content. Arsenic in groundwater increases toward the base rock containing Tertiary volcanic rocks. Through detailed scanning electron microscope (SEM) and electron microprobe (EMP) work, arsenic minerals are identified in the cavities of the Tertiary volcanic tuff from the northeast part of the Tabalaopa Basin, city of Chihuahua. Arsenic minerals, the As–Sr–Al phase (a possible arsenogoyazite–arsenoflorencite group mineral) crystallized in the vesicles of the tuff and the As–Y bearing phase included in biotite, prevail in the studied Tertiary volcanic outcrops. Based on the current study, the arsenic anomaly in the Tabalaopa–Aldama aquifer corresponds to these arsenic phases in the Tertiary volcanic rocks.

show abstract

“…Analyses of the hydrochemical characteristics and their evolutionary trends [33][34][35] in the northern and southern basins of the Kashi region (Figure 3) were based on the Piper tri-linear diagram method. The results revealed that Ca 2+ was the primary cation in the confined and phreatic waters of the Kizil-Cakmak River Basin.…”

Section: Hydrochemical Characteristicsmentioning

confidence: 99%

Spatial Assessment of Hydrochemical Characteristics and Evolution of Inferior Quality Water in Kashi Delta

Qu¹,

Su²,

Jiao³

et al. 2021

Water

View full text Add to dashboard Cite

Hydrochemistry is a critical indicator of water quality. We analysed 146 hydrochemical parameters of groundwater and the hydrogeological background of the Kashi region in China, examined their spatial distributions, and elucidated the mechanisms of their occurrence. We used graphical and multivariate statistical methods to distinguish between high- and poor-quality water. In the Kizil-Cakmak River Basin of the northern Kashi region, the primary cations were Ca2+ and Mg2+, and the primary anion was SO42−; their concentrations were four times higher than the Class III water quality standard. Additionally, the salinity was high. In contrast, in the upstream and midstream parts of the Gez-Kushan River Basin in the southern Kashi region, the primary ions were HCO3− and SO42−, and the salinity was low. Downstream of the Gez-Kushan River Basin, the primary ion was Cl−, and the salinity was low. There was a wide-ranging spatial variability in the SO42−, Cl−, and Ca2+ contents throughout the study area. The present findings can be applied to locate suitable domestic, agricultural, and industrial water sources in the Kashi region and can provide theoretical guidance for the scientific development and management of groundwater in this region.

show abstract

A multivariate non-parametric approach for estimating probability of exceeding the local natural background level of arsenic in the aquifers of Calabria region (Southern Italy)

Cited by 44 publications

References 67 publications

Identification of Water Contamination Sources Using Hydrochemical and Isotopic Studies—The Kozłowa Góra Reservoir Catchment Area (Southern Poland)

Identification of Water Contamination Sources Using Hydrochemical and Isotopic Studies—The Kozłowa Góra Reservoir Catchment Area (Southern Poland)

Arsenic Mineral in Volcanic Tuff, a Source of Arsenic Anomaly in Groundwater: City of Chihuahua, Mexico

Spatial Assessment of Hydrochemical Characteristics and Evolution of Inferior Quality Water in Kashi Delta

Contact Info

Product

Resources

About