Abstract:
Clays and clay minerals are promising substitutes for environmental protection, due to their ion-exchange adsorption, high versatility, easily manipulated properties, and low costs. The kaolinite, bentonite, and zeolites (mordenite) were examined for the adsorption tests by putting each in the solution that contains 2.0 ppm multiple heavy metal, (Pb, Zn, Cu, Cr (VI), Cd, Hg, As), maintained at three pH values of 5.0, 7.0, and 9.2. The tests results are encouraging and for all elements which changed to below the toxic limits (Environmental Quality Standards) except Cr(VI), which is not adsorbed to the required level.
Page(s):
21-31
DOI:
DOI not available
Published:
Journal: Geologica (research bulletin of geoscience laboratory geological survey of pakistan,islamabad), Volume: 5, Issue: 1, Year: 2000