Provenance and fate of arsenic and other solutes in the Chaco-Pampean Plain of the Andean foreland, Argentina: From perspectives of hydrogeochemical modeling and regional tectonic setting

Influence of geology on groundwater–sediment interactions in arsenic enriched tectono-morphic aquifers of the Himalayan Brahmaputra river basin

“…A similar approach has been applied in previous studies which made in Andean(Raychowdhury et al, 2014) andAppalachian orogenic belt (Peter 2008).The earliest well constrained collisional event initiated in early Cenozoic(Yin 2006), that linked closer of "Paleotethys" and opened a new oceanic subdivision, the "Neotethys". This movement marked by the collision of the Indian plate with Eurasian plate and transformed southern Asia into an active continental margin (Figure 16).…”

Hydrogeochemical controls on mobilization of arsenic in groundwater of a part of Brahmaputra river floodplain, India

“…3)indicates that the groundwater samples from the Bongaigaon district were predominantly of Ca-HCO 3 − type, while those of the Darrang district were either Na-Ca-HCO 3 − or Ca-HCO 3 − type The Piper plot(Fig. 3)reveal Na-Ca-HCO 3 − type or Ca-HCO 3 − water types for groundwaters in Darrang district and thereby the prevalence of more than one hydrogeochemical facies in the aquifers, as a consequence of groundwater-aquifer matrix interactions along flow path(Raychowdhury et al 2014).The principal hydrochemical facies include Ca-HCO 3 − , Ca-Na-HCO 3 − and Na-Ca-HCO 3 − which are in agreement with the reported facies by a similar work in and around the study area by Verma et al (2015, this volume). Although, the Ca-HCO 3 − is the most dominant hydrochemical facies, other type of groundwaters are also widely noticed.…”

Introducing Simple Detection of Bioavailable Arsenic at Rafaela (Santa Fe Province, Argentina) Using the ARSOlux Biosensor

“…From Table 1 , it can be observed that, using the Pearson correlation [ 8 ], a significant correlation with As concentration at a 95% of confidence ( p < 0.05) can be observed for pH and the concentration of B, Si, V and F − , being Si the only element showing a negative correlation with As. If the Spearman correlation is used instead [ 34 ], other negative correlations can be observed, as for example with Mn, Cl − , SO 4 2− and EC (at a 95% of confidence), and especially with Fe and Ca (at a 99% of confidence, p < 0.01).…”

“…The rather high measured values of silicate (Si) have been related with the dissolution of volcanic glass [ 8 , 9 ], a process that was held responsible for the arsenic presence in the Chaco-Pampean plain [ 8 , 34 ] along with leaching of loess-type sediments [ 7 ]. Silicate is also known to have a positive correlation with total arsenic [ 2 , 34 ], as it competes with arsenic for adsorption sites in the aquifer [ 34 ]; the negative correlation here obtained with Si has been never reported before, although Gómez et al , reported no correlation between total arsenic and Si [ 9 ]. The high values of Si can negatively affect the use of reverse osmosis for arsenic removal [ 37 ].…”