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Adsorption of atrazine herbicide from water by diospyros kaki fruit waste activated carbon

de O. Salomón, Yamil L.; georgin, jordana; P. Franco, Dison S.; Netto, Matias S.; A. Piccilli, Daniel G.; Foletto, Edson; Pinto, Diana; S. Oliveira, Marcos L.; Dotto, Guilherme Luiz (ElsevierNetherlands, 2021-11-10)

In this work, Diospyros kaki fruit waste was employed as a precursor material to develop a high surface area activated carbon, which efficiently removed the toxic herbicide atrazine (ATZ) from synthetic water solutions and ...
Effects of atmospheric pollutants on human health and deterioration of medieval historical architecture (North Africa, Tunisia)

O. Silva, Luis F.; S. Oliveira, Marcos L.; Neckel, Alcindo; Stolfo Maculan, Laércio; Milanés Batista, Celene; Bodah, Brian W.; Cambrussi, Laura; Dotto, Guilherme Luiz (Elsevier BVNetherlands, 2021-12-02)

Air pollution is a factor of concern on a global scale, accelerating the deterioration of historic medieval architecture and having harmful effects on human health. The general objective of this study is to understand the ...

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Adsorption of atrazine herbicide from water by diospyros kaki fruit waste activated carbon
...
de O. Salomón, Yamil L. | 2021-11-10

In this work, Diospyros kaki fruit waste was employed as a precursor material to develop a high surface area activated carbon, which efficiently removed the toxic herbicide atrazine (ATZ) from synthetic water solutions and river waters. The alternative activated carbon presented excellent characteristics and structure, including high values of specific surface area (1067 m2 g 1) and pore volume (0.530 cm3 g 1) and some important functional groups on the surface. The temperature positively influenced the adsorption capacity, from 194.20 to 211.51 mg g 1. The Freundlich model was the proper one to represent the equilibrium data. Thermodynamic parameters confirmed the endothermic nature of the adsorption process. Kinetic studies confirmed that equilibrium was reached until 240 min, regardless of ATZ initial concentration. The LDF model adjusted well to the kinetic data, resulting in a diffusion coefficient ranging from 0.89x10-9 to 1.63x10-9 cm2 s 1 as the ATZ concentration increased. The activated carbon also decreased 85% of the ATZ concentration in a river water sample. Overall, the activated carbon developed from Diospyros kaki fruit waste presented an efficient ATZ removal from aqueous matrices.

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Effects of atmospheric pollutants on human health and deterioration of medieval historical architecture (North Africa, Tunisia)
...
O. Silva, Luis F. | 2021-12-02

Air pollution is a factor of concern on a global scale, accelerating the deterioration of historic medieval architecture and having harmful effects on human health. The general objective of this study is to understand the risks of atmospheric contamination that contribute to the degradation of the medieval historical heritage of (1) Bab El Bhar, (2) the Tunis Train Station and (3) the Bardo National Museum, in the City of Tunis, capital of Tunisia, located in North Africa. Sequentially, 64 samples were collected in SMPSs and 64 of dust particles in sites 1, 2 and 3, from 2015 to 2019. Field Emission Scanning Electron Microscopy (FE-SEM) was utilized together with High Resolution Transmission Electron Microscopy (HR-TEM) and the coupled with an Energy Dispersive X-ray (EDS), which allowed a better characterization and identification of NPs in images, using Energy Dispersive X-ray (EDS). The Bab El Bhar SMPS samples yielded a higher proportion of ultrafine and organic particles. Sedimented dusts showed high proportions of organometallic particles (Al, As, Ba, Ca, Cd, Co, Cr, Fe, K, Mg, Mn, Mo, Na, Ni, Pb, S, Sb, Se, Si, Sn, Ti, V and Zn). The need to create public policies to protect both human health and physical historic infrastructure is noted, as this study identified dangerous elements harmful to human health in ultrafine particles, easily suspended by the wind and highly corrosive to historical buildings from the medieval period in the air of a busy metropolitan tourist site.

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Adsorption of atrazine herbicide from water by diospyros kaki fruit waste activated carbon ﻿

Effects of atmospheric pollutants on human health and deterioration of medieval historical architecture (North Africa, Tunisia) ﻿

Envíos recientes

Adsorption of atrazine herbicide from water by diospyros kaki fruit waste activated carbon

Effects of atmospheric pollutants on human health and deterioration of medieval historical architecture (North Africa, Tunisia)

Adsorption of atrazine herbicide from water by diospyros kaki fruit waste activated carbon

Effects of atmospheric pollutants on human health and deterioration of medieval historical architecture (North Africa, Tunisia)