Abstract: An improved process for the remediation of soil contaminated by the presence therein of organic or semi-volatile inorganic contaminants which comprises (1) supplying thermal energy to the soil at one or more locations under the surface of the soil, (2) collecting the vapors resulting from contaminant vaporization or decomposition under the influence of the thermal energy, after passage horizontally through the soil, at one or more locations under the surface of the soil and separating from the collected vapors the environmentally undesirable components thereof.

Abstract: A process for the removal of H.sub.2 S from sour gaseous streams is disclosed, the process being characterized by the use of solutions containing vanadium V-containing ions and phosphate ions in sufficient amount to convert the H.sub.2 S to elemental sulfur. The process may be cyclic, allowing for continuous operation. A composition suitable for use in the process is also disclosed.