Open AccessWashing and Caustic Leaching of Hanford Tank Sludge: Results of FY 1998 Studies
Author(s) -
G.J. Lumetta,
BM Rapko,
J Liu,
DJ Temer,
Ronald D. Hunt
Publication year - 1998
Language(s) - English
Resource type - Reports
DOI - 10.2172/2267
Subject(s) - leaching (pedology) , chemistry , sodium hydroxide , hydroxide , chromate conversion coating , caustic (mathematics) , nuclear chemistry , nitrate , pulp and paper industry , waste management , inorganic chemistry , environmental science , chromium , physics , mathematical physics , organic chemistry , soil science , engineering , soil water
Sludge washing and parametric caustic leaching tests were performed on sludge samples tiom five Hanford tanks: B-101, BX-1 10, BX-112, C-102, and S-101. These studies examined the effects of both dilute hydroxide washing and caustic leaching on the composition of the residual sludge solids. ` Dilute hydroxide washing removed from <1 to 25% of the Al, -20 to 45% of the Cr, -25 to 97% of the P, and 63 to 99% of the Na from the Hdord tank sludge samples examined. The partial removal of these elements was likely due to the presence of water-soluble sodium salts of aluminate, chromate, hydroxide, nitrate, nitrite, and phosphate, either in the interstitial liquid or as dried salts