الفهرس 
Toxicological assessment of silver nanoparticles after water treatment with orange and banana peels using Oreochromis niloticus as a bioindicator
AbstractOnly 14 pages are availabe for public view
 |  | from | 200 |  |  |
| | | from | 200 | | |
Abstract
Ag NPs have wide medical and industrial applications and they are
significantly released into aquatic environments. The current work aimed to
evaluate (for the first time) the adsorption potential of OP and BP used, in water
treatment, to reduce the toxicity of Ag NPs in (Oreochromis niloticus). Fish were
divided into 4 groups: 1- Control group (dechlorinated tap water), 2- Ag NPs (4
mg/L) exposed group, 3- Ag NPs (4 mg/L) + OP (40 mg/L) group, and 4- Ag NPs
(4 mg/L) + BP (40 mg/L) group for 24 h., 48 h. and 96 h. The adsorptive potential
of Ag NPs on both peels was confirmed by the SEM, Energy Dispersive X-Ray
Spectroscopy and map analyses. Fish exposed to Ag NPs showed a significant
decrease in RBCs, Hb, Hct and MCH besides elevated MCV after 48 & 96 h. There
was significant gradual elevation in plasma glucose, total proteins, globulin, AST,
ALT, ALP, creatinine and uric acid after Ag NPs exposure. While albumin and total
lipid have significantly decreased. Antioxidant biomarkers in gills and liver tissues
after Ag NPs exposure revealed severe oxidative damages (maximally after 96 h.)
as shown by the increase in CAT, SOD, Gpx & TBARS and decrease in GSH. Ag
NPs accumulation revealed marked increases as follows: liver > kidney > gills >
skin > muscles. Different histopathological alterations caused by Ag NPs have been
observed in the gills, liver and kidneys. All studied parameters are restored more or
less values near to the control groups after treatment with OP and BP. Both peels
showed good adsorptive ability toward Ag NPs especially BP, based on the high Ag
concentrations in BP, throughout the experiment and the improved status of fish