Measurement of elements by portable x-ray fluorescence spectrometry for the study of adsorption processes: the case of Pbadsorption on soybean straw biochar.

This study evaluated the reliability of portable X-ray fluorescence (pXRF) in Pbadsorption kinetics and isotherm experiments using soybean straw biochar. The research aimed to compare pXRF results with those obtained through traditional atomic absorption spectrometry (AAS). Soybean straw biochar, produced at 400 °C, was employed as the adsorbent for Pb.

PM correlates with COVID-19 infections 15 days later in Arequipa, Peru.

The emergence of COVID-19 and the spread of this novel disease around the world in 2020 has entailed several cultural changes; some of those changes are positive for the environment, such as the decrease in the concentration of atmospheric particulate matter. We compared the concentrations of PM and PM recorded in October and November 2019 (pre-pandemic period) with the concentrations recorded from May to October 2020 (pandemic period) in the city of Arequipa, Peru. A significant decrease in the concentration of PM (less than 21.

Monitoring of particulate matter (PM and PM) in San Juan city, Argentina, using active samplers and the species Tillandsia capillaris.

The concentration of particulate matter (PM and PM) was studied in San Juan city, Argentina, during winter and spring of 2017. Samplers of particulate matter (PM) and individuals of the plant species Tillandsia capillaris were placed in the centre of the city to be used as a biomonitors of atmospheric particulate matter. The PM filters and PM deposited in T.

Pb tolerance and accumulation capabilities of Bidens pilosa L. growing in polluted soils depend on the history of exposure.

Phytoremediation, especially phytoextraction, is a good alternative for remediation of soils contaminated with heavy metals. This method requires selection of species for their tolerance, high accumulation levels in harvestable parts, and high biomass production. Bidens pilosa L.

Health risk assessment of polycyclic aromatic hydrocarbons (PAHs) adsorbed in PM and PM in a region of Arequipa, Peru.

The concentrations of PM and PM, as well as those of the PAHs bound to these particles, were quantified at four sites in the region of Arequipa, Peru, during the year 2018. These samples were collected with high volume samplers, and the concentrations of the PAHs were quantified by liquid chromatography (HPLC). The values found for PM and PM at all the sampling sites in Arequipa exceeded the norms established in Peru (50 μg m annual average value for PM and 25 μg m annual average value for PM), with the industrial site presenting the highest values of particulate matter (PM max = 235.