Method for the treatment of Solutions, suspensions, industrial Sewage Sludge or primary, secondary and / or digested in a Ferritic Matrix and immobilization of heavy metals, Alkali and Alkaline Earth elements contained in the same

摘要

A method for treating Solutions, suspensions or industrial Sewage Sludge containing heavy metals or as ni, co, ba, St, CD, Hg, MN, Zn, SM, and eventually general Bivalent Elements Li, etc. and immobilize them in a Ferritic Matrix that prevents the Pole leaching - Environment.Get two favourable Effects, on the one hand, Treat the solutions containing Heavy Metals in proper way and for the other to produce a product which immobilizes them all at the same time with a single process.Method which comprises the following steps: a) mixing the product to treat Heavy metal container, Bivalent, Alkaline and Alkaline Earth Elements, preferably with FERRIC Iron salts; (b) add to the mixture of Step (a) a solution with extreme pH,Until the PH Range is between 6 and 11; (c) separate the Solids from the liquid; (d) Dry Solids obtained); and calcining to obtain a Ferritic Matrix type Surface; The Liquid obtained in STEP (c) is removed, and the supernatant is suitable For reuse.The stage) can also add small amounts of SODIUM SULFIDE, sulfohidruro Sodium or Calcium POLYSULFIDE and a Helper of coagulation. You can perform batch or continuous.