As the quantity of hazardous industrial wastes increases significantly owing to rapid industrialization, its appropriate management is required to reduce adverse impacts on humans and ecosystems. This work evaluated the integrity and retention of heavy metals in materials stabilized by solidification. It was adopted a completely randomized design with a single factor, that is, the averages of four treatments were compared (A, B, C and D) with 0, 40, 50 and 60% respectively contaminants and three repetitions. Portland cement, bentonita and lime-fly ash binders were used to solidify a synthetic heavy metal sludge containing oxides of Cd2+, Pb2+ e Cu2+. It can be concluded that the treatment influenced the result of leaching of cadmium, lead and copper. The treatments showed that the concentrations of solubilized and leachate extract increase with the amount of cadmium, lead and copper added. The highest price was found in the material from the treatment D, that presented leaching equal to 32.815 mg.kg-1 for cadmium and 29.769 mg.kg-1 for the lead. For the tests of integrity/durability, it was found that increasing the absorption of water has caused resistance to compression decreased. The use of cement, calcium hydroxide and sodium bentonite were ideal for retention of heavy metals, avoiding leaching and solubilization for it's the environment.
solid wastes; protocol for the evaluation; heavy metal; stabilization; solidification
