Adsorption of Heavy Metals in Contaminated Water Using Zeolite Derived from Agro-Wastes and Clays: A Review

Table 6

Summary of the XRD analysis of zeolites.

Zeolite	Synthesis method	Observations	References
Clinoptililite	Ultrasonic-assisted preconcentration	Pore closure reduces peak intensity on modification	[217]
Zeolite X	Hydrothermal synthesis	Rietveld calculations shown 75% zeolite content	[218]
Zeolite A	Hydrothermal synthesis	Rietveld calculations shown 70% zeolite content	[218]
Zeolite ZSM-5	Hydrothermal treatment	The increase in nucleation period favored the formation of zeolite crystal	[221]