1,721,063 research outputs found
Valutazione dell’applicabilità degli impianti di fitodepurazione per il trattamento e il riutilizzo delle acque reflue nei Paesi in via di sviluppo
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Preface - Nanotechnologies for Environmental Remediation: Applications and Implications
Full text linkTreatment of reactive dyes and textile finishing wastewater using Fenton’s oxidation for reuse
No full textSustainable wastewater management in developing countries: are constructed wetlands a feasible approach for wastewater reuse ?
No full textPhytotoxicity of vancomycin: seed germination and root elongation in some crops
No full textDuring last decades, the production and consumption of antibiotics have increased rapidly worldwide. This overuse has been highlighted as one of the biggest emerging threats to human health and ecosystems, due to the undesirable effects related to the antibiotics released into the environment. Most research focused on antibiotic resistance spread, whereas the toxicity to plants remained a quite unexplored field. Agricultural systems are recognized as a potentially significant source of antibiotics to the aquatic environment due to runoff and leaching after biosolid application from wastewater treatment plants, manure from livestock operations, or excretion from free-ranging livestock, but their
effects on crops have not been well documented yet. The present study aimed at assessing the phytotoxic effects of a glycopeptide antibiotic (vancomycin) on seed germination of four different crops (Solanum lycopersicum cv. Crovarese, Solanum lycopersicum cv. San Marzano, Eruca sativa, Diplotaxis tenuifolia) during a short-term exposure (7 d). Crops were exposed to a range of concentrations (0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 7.5, 10, 15, 22 mg/L) of vancomycin. Root and shoot emergence and final length, root elongation rate and total biomass were used as endpoints. Data were analysed by multivariate exploration with a Generalised Canonical Discriminant Analysis -
modelling of parameter-dose relationships via Generalised Additive Models. Results showed that vancomycin can significantly affect the germination of all the analysed cultivars, with the only exception of S. lycopersicum cv. San Marzano
Advanced oxidation of catechol: A comparison among photocatalysis, Fenton and photo-Fenton processes.
No full textThe aim of this work was to compare the behaviour of Fenton, photo-Fenton and photocatalysis processes to treat catechol solutions which are pollutants occurring in wastewaters from many industries. The effect of different process parameters, such as initial catechol concentration, H2O2/FeSO4 ratio in Fenton and photo-Fenton oxidation, TiO2 loadings in photocatalysis and irradiation times has been studied.
Fenton and photo-Fenton (H2O2/FeSO4 = 600/500 (w/w) and 30 min reaction time) processes allowed us to achieve a high efficiency in the mineralization of catechol (COD removals up to 83% and 96% respectively), and removal of aromaticity (UV280) (up to 93% and 98% respectively), for an initial catechol concentration of 110 mg/l. On the opposite, photocatalysis was not effective in the removal of higher catechol concentrations (110 and 200 mg/l), whereas a significant removal of aromaticity versus time was observed for 50 mg/l. Gas chromatography–mass spectrometry analysis, performed under selected treatment conditions, showed that total removal of catechol can occur after Fenton (2000/500 w/w; 30 min), photo-Fenton (600/500 w/w; 30 min), and photocatalysis (3 g TiO2/l; 240 min) treatments
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