this search, we studied how to purify wastewater (agricultural water) using nanotechnology.
As it offers affordable, eco-friendly solutions for wastewater treatment. The proposed physical
model is expressed by studying the role of adding nanocarbon particles to the free convection
boundary layer viscoelastic fluid flow past a vertical porous cone surface. The system of nonlinear
partial differential equations governing the problem has been transformed by a similar
transformation into a system of ordinary nonlinear differential equations, which is solved
numerically by applying the Runge-Kutta technique with the shooting procedure. Graphical
results for the velocity and temperature for various parametric conditions are presented and
discussed. The most significant findings in this work are that the addition of carbon nanoparticles
will increase water velocity, then reduce the mass of the deposit in treated water; the addition of
hybrid carbon nanoparticles will decrease the mass of the sediment in agricultural wastewater
treatment; and the increasing in the volume of carbon nanoparticles will increase water velocity