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

Table 1

The amount of cadmium that was adsorbed with the change of the pH function and the immersion time in a 10 ppm solution.

pH	Capacity
	Time 10 (min)	Time 30 (min)	Time 60 (min)
2	1.79	1.92	2.6
4	1.62	1.79	1.92
6	0.1	0.2	1.41