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Impact of Nanoparticles on Nitrogen Transformation and Soil Health

KrishiKosh

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Title Impact of Nanoparticles on Nitrogen Transformation and Soil Health
Ph D
 
Creator SARVENDRA KUMAR
 
Contributor A. K. Patra
 
Description T- 8705
Widespread applications of nanoparticles in various industries will inevitably result in the release of a substantial amount of nanoparticles into the environment. Nanoparticles (NPs) exhibit novel physicochemical properties that determine their interaction with biological substrates and processes. An effort was made to investigate the effects of standard autoclaving (heat/steam) on the structural integrity, surface morphology and toxicology to bacterial population in soil by nano-ZnO, nano-Fe2O3 and fullerene nanoparticles. The lattice parameters and crystal structure of nanoparticles were characterized by X-ray diffraction (XRD). Surface morphology, particle size and chemical constituent of nano-powder were studied using transmission electron microscopy (TEM) and scanning electron microscope (SEM) coupled with energy dispersive x-rays (EDX). The experimental results indicated that autoclaving has caused variations in morphologies (shape and size), basic integrity, and arrangement of particles but chemical constituent and crystallinity of nanoparticles did not change. Autoclaving led to increase in the sharpness of the peak (XRD) as well as the intensity of nano-ZnO, nano-Fe2O3 particles. Lowering of FTIR spectral frequency of C60 fullerene nanoparticles indicates autoclaving process did not chemically change the fullerene. SEM and TEM micrograph revels the agglomeration of nanoparticles as well as lead to a decrease in size of the nanoparticles (nano-ZnO and nano-Fe2O3) after autoclaving. Toxicological effects of nanoparticles to bacterial population significantly (P < 0.05) increased after autoclaving, this might be due to change in morphology as depicted by TEM and SEM micrograph. Our results suggest there is a need for more studies to get an improved understanding of the behavior of different nanoparticles in soil ecosystems for safer use.
 
Date 2016-09-06T17:10:27Z
2016-09-06T17:10:27Z
2012
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/75747
 
Format application/pdf
 
Publisher IARI, Division of Soil Science and Agricultural Chemistry