“…The soils developed on the Brenta megafan (sampled from the uppermost 1 m) are characterized by high concentration of As (Giandon et al, 2011;Tarvainen et al, 2013;Ungaro et al, 2008), indicative of substantial As accumulation processes in the sedimentary materials. The As concentrations in these soils are often higher than the Italian limit for public, residential, and private uses of soil (Giandon et al, 2011), which has been established as 20 mg/kg (national regulation D. Lgs.…”
“…The soils developed on the Brenta megafan (sampled from the uppermost 1 m) are characterized by high concentration of As (Giandon et al, 2011;Tarvainen et al, 2013;Ungaro et al, 2008), indicative of substantial As accumulation processes in the sedimentary materials. The As concentrations in these soils are often higher than the Italian limit for public, residential, and private uses of soil (Giandon et al, 2011), which has been established as 20 mg/kg (national regulation D. Lgs.…”
“…The me dian of the As con cen tra tions found in our study was higher by a fac tor of two than the me dian con cen tra tions re ported for years 2000 and 2005 (tab. 3), which can, to a cer tain ex tent, be ex plained by the fact that the soils in the in ves ti gated re gion of East ern Ser bia con tain re mark ably high con cen tra tions of As [44]. How ever, its anthropogenic sources, such as the burn ing of coal, which can con tain con cen trated As [45], are also ex pected to con trib ute to the ob served con cen tra tions.…”
part ment of Neu tron Ac ti va tion Anal y sis and Ap plied Re search, Di vi sion of Neu tron Phys ics, Frank Lab o ra tory of Neu tron Phys ics, Joint In sti tute for Nu clear Re search, Dubna, Rus sia Sci en tific pa per
“…Arsenic contamination of agricultural soils, grazing soils, and ground waters represents a serious problem in several countries of Europe, such as Spain, France, Czech Republic, and Slovakia [1]. European Union (EU) drinking water directives refer very strictly how to meet metalloid standards.…”
The utilization of carbon-rich pyrolysis materials in the separation processes of metalloids plays a crucial role in analytes pre-concentration techniques and opens a burning issue in new sorbents development. This study characterized the effect of physical and chemical activation with subsequent iron impregnation of grape seed-derived biochar on sorption removal of As from model aqueous solutions. Sorbents that were produced in slow pyrolysis process at 600 °C were characterized by SEM, elemental, and specific surface area analysis. Sorption separation of As by the studied materials was characterized as on contact time and an initial concentration dependent process reaching sorption equilibrium in 1440 min. Air activated biochar (A1GSBC) showed about 7.7 times and HNO3 activated biochar (A2GSBC) about 6.8 times higher values of Qmax as compared to control (GSBC). A1GSBC and A2GSBC can be easily and effectively regenerated by alkali agent in several cycles. All of these results showed the practical use of the activation process to produce effective sorption materials with increased surface area and improved sorption potential for anionic forms separation from liquid wastes.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.