Charge Neutralization Study of Mixtures of Al13 with Alum


Chemistry and Biochemistry

Document Type


Publication Date

Spring 2010


Partially neutralized aluminum solns. with a basicity ([OH-]/[Al3+]) of 2.5 contain the polymeric aluminum moiety, [AlO4Al12(OH)24(H2O)127+], represented as Al13 at more than 90% of the total Al. Coagulants can be titrated into raw water until a zero zeta potential is achieved. Water types (pH range of 7.1 to 7.9) of varying alky. (50 and 100 ppm CaCO3) and varying turbidity (∼9.0, ∼62, ∼160 NTU) achieved a zero zeta potential with mixts. of Al13 and aluminum sulfate using the least amt. of total aluminum compared to aluminum sulfate (monomeric aluminum) alone.

This document is currently not available here.