فهرست مطالب manoranjan mishra

Nitrate contamination of surface water through different human activities is an alarming issue for Human sound health survivorship. So, we have attempted to estimate and remove nitrate contamination levels in water samples, collected from the Rushikulya River in Odisha, India. A detailed study is done on the impact of nitrate contamination in various aspects and their removal is absorbed through an experimental composite adsorbent that is prepared taking rice husk dust and Bagasse waste from corn (Argo-based waste product) with different proportions of each. The nitrate absorbance was analyzed with the spectrophotometric method. The efficiency of adsorbents is identified through SEM and found that with an increase in the alkaline state of water sample up to 13 and composite proportion ratio with 20% rice husk and 80% bagasse waste from corn, removes nitrate up to 95% from contaminated water sample. A maximum of 98.0% of nitrate was removed from the water at a pH of 11. Also, maintaining the COD range of 250 mgL-1, the nitrate could be removed up to 94%.  The composite of CM-9 has the highest density of 279.88 kg m-3. These matrices are applied for the treatment of contaminated river water samples to remove nitrate.

Nanoparticles (NPs) have wide engineering and industrial applications including improving heat transfer, cooling and heating processes, refrigeration, and medical sciences like cancer treatment etc. Further, Buongiorno model is used to determine how Brownian motion and thermophoresis affect the unsteady 2D flow of Casson nanofluid (NF) over a stretching sheet entrenched in a porous medium. The flow is exposed to an exponential heat source, thermal radiation, dissipation, Joule heating, and transverse magnetic field. The diffusion of chemically reactive NPs to base fluid has been considered. The leading equations of flow model admit similarity solution and reduce to non-linear ODEs by appropriate similarity renovations and elucidated numerically by MATLAB software using bvp4c code. It is found that incidence of NPs in the base fluid reduces the shearing stress at the plate surface so as to avoid back flow. Thermophoresis favours the rise in volume fraction and temperature of the nanofluid. Use of high-Prandtl number base fluid and NP of high thermal conductivity could be of practical use to increase the rate of heat transfer and to avoid NP accumulation.