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Effect of Iron on Waste‐Glass Leaching
Author(s) -
McVAY GARY L.,
BUCKWALTER CHARLES Q.
Publication year - 1983
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1983.tb10010.x
Subject(s) - borosilicate glass , dissolution , leaching (pedology) , saturation (graph theory) , colloid , silicate , corrosion , materials science , mineralogy , metallurgy , chemistry , geology , soil water , mathematics , organic chemistry , combinatorics , soil science
The interactive effects between ductile iron and PNL 76–68 borosilicate glass were investigated as a function of time in 90°C static deionized, tuff, and basalt groundwaters. A syn‐ergistic effect occurs between the two materials, i. e. iron enhances glass dissolution and glass enhances iron corrosion. An iron silicate precipitate forms, part of which is colloidal in nature. This precipitate effectively removes many of the elements from solution and therefore inhibits the saturation effects which normally cause decreases in elemental removal rates. Thus, the effects of initial solution composition on the glass leach rates are significantly reduced and the relatively high early leach rates normally observed in deionized water are maintained for longer times due to the suppression of saturation effects. This results in more total elemental removal from the glass in all of the groundwaters evaluated. The precipitate and its colloidal form require further characterization.