For the solidification of oily and contaminated wastes anorganic as well as organic fillers and binders were tested. The selection of suitable materials included the use of descriptive criteria (consistence, thixotropy, properties when immersed in water) as well as oil extruding tests, compressive strength tests, vane shear tests, leaching tests and stripping tests for volatiles. In addition sorption and de-sorption studies using hexachlorobenzene as a hydrophobic organic model micropollutant were performed.The anorganic binders and fillers showed little success; submersed in water, e.g., the solidification products decomposed to the phases they consisted of. Good success, on the other side, was found using organic solids such as natural asphalt or lignite powder. The quantity of solids necessary for successfull solidification, however, was relatively high (75 %). The sorptivity was considerably higher than that of inorganic materials. Consecutive desorption tests yielded indications, that above high sorptivity chemical bonding of the pollutants to the solids were established.
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- Solidifikation, Stabilization and Encapsulation of Organic Compounds from Remedial Actions Using Inorganic and Organic Fillers and Binding Agents
- Springer Netherlands
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