The possibility of controlling Zn in industrial wastewater was studied using modulated phyllosilicate, sepiolite. Its effectiveness was assessed after regeneration when changes in the mineral crystal chem. may have occurred as a result of treatment. In order to simulate what happens when measures are taken to reduce water pollution, the interaction between sepiolite and Zn2+ in aq. solns. was studied through the measurement of the Zn2+ sorption-desorption rates. Zn2+ retention by the sepiolite bed becomes limited, but not abolished, by repeated regeneration with Na+ solns. at increasing concns. The Zn2+-treated sepiolite structural features are only slightly influenced by Zn2+ partly exchanged for Mg2+.
Use of sepiolite in zinc polluted industrial waste water purification / Brigatti, Maria Franca; Frigieri, P.; Medici, L.; Poppi, Luciano; Roli, S.. - In: MATERIALS ENGINEERING. - ISSN 1120-7302. - STAMPA. - 7:(1996), pp. 521-533.
Use of sepiolite in zinc polluted industrial waste water purification.
BRIGATTI, Maria Franca;POPPI, Luciano;
1996
Abstract
The possibility of controlling Zn in industrial wastewater was studied using modulated phyllosilicate, sepiolite. Its effectiveness was assessed after regeneration when changes in the mineral crystal chem. may have occurred as a result of treatment. In order to simulate what happens when measures are taken to reduce water pollution, the interaction between sepiolite and Zn2+ in aq. solns. was studied through the measurement of the Zn2+ sorption-desorption rates. Zn2+ retention by the sepiolite bed becomes limited, but not abolished, by repeated regeneration with Na+ solns. at increasing concns. The Zn2+-treated sepiolite structural features are only slightly influenced by Zn2+ partly exchanged for Mg2+.
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