“…Generally, the data reported Nightingale and Bianchi, 1977;Khilar and Fogler, 1984;Kia et al, 1987; . Rosario et al, 1996;Roy and Dzombak, 1996 compare qualitative trends to those expected by Derjaguin-Landau-Ž . Verwey-Overbeek classical-DLVO theory for solution Ž chemistry changes Derjaguin and Landau, 1941;Verwey and .…”