Browsing by Author Costov, Ioan
Showing results 7 to 9 of 9
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Issue Date | Title | Author(s) |
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30-Aug-1985 | Recovering coagulant from treating residual waters by dissolving hydroxide formed, residual and unused acid, adding and formaldehyde, washing aminoplast and reusing water | Parmac, Sorin; Buliga, A.; Cruceru, Mihail; Dumitrescu, Emil; Costov, Ioan; Ghiorghiu, G. |
15-Sep-1988 | Recuperation of silver from photosensitive material waste consists of washing with sodium hydroxide soln., sludge separation, and alkaline fluxing after drying | Parmac, Sorin; Costov, Ioan; Trestioreanu, F.; Beleaua, Victor; Polgar, I.; Stanciu, M. |
30-Oct-1984 | Treating residual acidic waters from chemical fertiliser industry with phosphorus and opt. phospho-gypsum by use as reagent and creation of high calcium carbonate content | Cruceru, Mihail; Coroiu, Cornel; Parmac, Sorin; Dumitrescu, Emil; Costov, Ioan |