Studying of cd2+ and pb2+ ions adsorption on sythetic clay like hydrotalcite
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sucnv@hcmute.edu.vnKeywords:
Cd2 ,, Pb2Abstract
The compound of magnesium aluminum hydroxide hydrate (STH) like hydrotalcite in nature was prepare in our laboratory. The adsorption bath experiments of calcined STH ( from 100 – 5000C) to adsorb Cd and Pb were carried out and the results obtained shown that the adsorption capacity of calcined STH more than 98% at pH from 5 - 8 with contact time is about 40 min for both elements. The effect of calcined temperature on sorption ability of STH was observed. When calcined temperature From 3000
C, calcined HTS strongly adsorbs cations of Cd and Pb. By using Freundlich isotherm to predict adsorption capacity of calcined STH for Cd and Pb founded that one gram of HTS adsorb about 250 mg and 150 mg per gram STH of Cd and Pb respectively.
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