Abstract
The present investigation has been carried out to assess a chromium, cobalt, and cadmium from wastewaters by natural and modified zeolites were examined by using batch type method. A clinoptilolite type synthetic / natural zeolite were pretreated with HCl and HNO 3 to improve the adsorption capacity for heavy metals. The removal efficiencies and kinetics of heavy metals such as chromium, cobalt and cadmium on natural modified zeolites were determined. The kinetics of adsorption indicates the process to be diffusion controlled. This process is very well work in industrial treatment plant of various industries using heavy metals for their production.
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