[Retracted] Preparation of Alumina Nanoparticles and Coating with Polyvinylpyrrolidone to Treat Cadmium Contamination of Water

Figure 1

The alumina before packaging with different magnifications (a) with a magnification of 1 μm, (b) at a magnification of 500 nm, (c) at magnification and of 200 nm.

(a)

(b)

(c)