Assessment of arsenic and associated metals in the soil-plant-water system in Neogene basins of Attica, Greece

Kampouroglou, Evdokia E.; Economou-Eliopoulos, Maria

doi:10.1016/j.catena.2016.11.018

Cited by 13 publications

(18 citation statements)

References 54 publications

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“…This was also proved by the high concentrations of As (73.34-73.87 μg/L), Co (1.06-1.36 μg/L), Cu (128.39-210.08 μg/L), Fe (2020.00-3940.00 μg/L), and Ni (13.25-19.21 μg/L) in 3 seawater samples simultaneously collected from the southwestern coast of the study area. Moreover, some research results further exhibited that increased concentrations of heavy metals in groundwater were attributed to seawater intrusion or salinization (Basahi et al, 2018;Kampouroglou and Economou-Eliopoulos, 2017). The highest concentrations of Cr occurred along the coastline of the northeastern study area while those of Mn occurred in the southern inland part of the study area.…”

Section: Resultsmentioning

confidence: 83%

“…The salinity could also increase the mobility of heavy metals in the soil (Acosta et al, 2011). Seawater intrusion or salinization was reported to account for increased concentrations of heavy metals in groundwater (Basahi et al, 2018;Kampouroglou and Economou-Eliopoulos, 2017). The highest concentrations of As, Co, Cu, Fe, and Ni occurred in the southwestern coast of the study area, similar to TDS, indicating that the concentrations of these heavy metals in shallow aquifer of the study area might be possibly influenced by the groundwater salinization mainly caused by seawater intrusion.…”

Section: Resultsmentioning

confidence: 99%

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Influence of coastal groundwater salinization on the distribution and risks of heavy metals

Wen

Lü

et al. 2019

Science of The Total Environment

151

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Coastal groundwater quality significantly affects the regional sustainable development, due to the water resource shortage in coastal zone. Current studies on coastal groundwater have mainly focused on saline water intrusion and over-extraction. Information on the heavy metal pollution of coastal groundwater with salinization trend is limited. This study investigated heavy metals in groundwater from a typical coastal region with intensive anthropogenic activities and saline water intrusion. The southwestern coastal plains of the study area showed significant groundwater salinization trend. Heavy metals in the coastal groundwater mainly originated from anthropogenic activities and groundwater salinization according to principal component analysis. Relative high concentrations of As, Co, Cr, Cu, Fe, Mn, and Ni occurred in the southwestern coast of the study area with high TDS level, indicating that the concentrations of these heavy metals in shallow aquifer of the study area might be influenced by the groundwater salinization. Average concentrations of heavy metals in groundwater of the study area ranged from 0.03 (Cd) to 686.92 (Fe) μg/L. Fe was the dominant heavy metal in groundwater with the maximal concentration of 2333.76 μg/L and exceeding-standard rate reaching 98.23%. Approximately 13.27% of sampling sites showed moderate or higher heavy metal pollution of groundwater based on heavy metal pollution index. Heavy metals in groundwater exerted low ecological risks. Elements Fe, Ni, and As were the main contributors for ecological risks. Cancer risks of heavy metals for both adults and children were high at all sampling sites. Non-cancer risks for adults and children were unacceptable at 4.42% and 17.70% of sampling sites, respectively. The

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Section: Resultsmentioning

confidence: 83%

Section: Resultsmentioning

confidence: 99%

Influence of coastal groundwater salinization on the distribution and risks of heavy metals

Wen

Lü

et al. 2019

Science of The Total Environment

151

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“…Detailed studies in Greece have shown that the main aquifers in the Greece are developed in alluvial formations, such as Quaternary and Neogene unconsolidated deposits (porous aquifers) covering the lowlands and semi-mountainous area of Greece and in carbonate rocks (karstic aquifers) [30][31][32][33][34][35][36][37][38]. Specifically, the Neogene Assopos-Thiva Basin (Figure 3c) is mainly composed of tertiary and quaternary sediments of more than 400 m thickness, and expands over an area of approximately 700 km 2 .…”

Section: Geological and Hydrological Outlinementioning

confidence: 99%

“…The most important aquifers in the Mesogeia Basin in Attica, which is part of the Attica-Cyclades zone, are constituted by Triassic-Jurassic limestones, Upper Cretaceous limestones, marly limestones, and travertine limestones (permeable rocks) [34][35][36][37][38]. The main part of the Mesogeia Basin, including the Koropi area ( Figure 2), is occupied by Quaternary formations (gravels, sand, and clays) which characterize a low productive phreatic aquifer [35].…”

Section: Geological and Hydrological Outlinementioning

confidence: 99%

“…The main part of the Mesogeia Basin, including the Koropi area ( Figure 2), is occupied by Quaternary formations (gravels, sand, and clays) which characterize a low productive phreatic aquifer [35]. The alluvial deposits form a phreatic aquifer displaying limited permeability and poor hydraulic characteristics, due to fine grain compositions; they feed a large number of wells and boreholes, with depths ranging from 10 to 20 m [35][36][37]. [34,35,37]; (c) simplified geological map presenting the sites of the groundwater well and soil samples at the C. Evia and Assopos-Thiva Basins [11,36].…”

Section: Geological and Hydrological Outlinementioning

confidence: 99%

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The Cr(VI) Stability in Contaminated Coastal Groundwater: Salinity as a Driving Force

Eliopoulos

Economou-Eliopoulos

2021

Minerals

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Chromium concentrations in seawater are less than 0.5 μg/L, but the Cr(VI) in contaminated coastal groundwater affected by Cr-bearing rocks/ores and/or human activities, coupled with the intrusion of seawater may reach values of hundreds of μg/L. A potential explanation for the stability of the harmful Cr(VI) in contaminated coastal aquifers is still unexplored. The present study is an overview of new and literature data on the composition of coastal groundwater and seawater, aiming to provide potential relationships between Cr(VI) with major components in seawater and explain the elevated Cr(VI) concentrations. It is known that the oxidation of Cr(III) to Cr(VI) and the subsequent back-reduction of Cr(VI) processes, during the transport of the mobilized Cr(VI) in various aquifers, facilitate the natural attenuation process of Cr(VI). Moreover, the presented positive trend between B and Cr(VI) and negative trend between δ53Cr values and B concentration may suggest that seawater components significantly inhibit the Cr(VI) reduction into Cr(III), and provide insights on the role of the borate, [B(OH)4]− ions, a potential buffer, on the stability of Cr(VI) in coastal groundwater. Therefore, efforts are needed toward the prevention and/or minimization of the contamination by Cr(VI) of in coastal aquifers, which are influenced by the intrusion of seawater and are threatened by changes in sea level, due to climate change. The knowledge of the contamination sources, hotspots and monitoring of water salinization processes (geochemical mapping) for every coastal country may contribute to the optimization of agricultural management strategies.

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Status of Arsenic Toxicity in the World

Babar

Tariq

2018

Mechanisms of Arsenic Toxicity and Tolerance in Plants

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Assessment of arsenic and associated metals in the soil-plant-water system in Neogene basins of Attica, Greece

Cited by 13 publications

References 54 publications

Influence of coastal groundwater salinization on the distribution and risks of heavy metals

Influence of coastal groundwater salinization on the distribution and risks of heavy metals

The Cr(VI) Stability in Contaminated Coastal Groundwater: Salinity as a Driving Force

Status of Arsenic Toxicity in the World

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