Aspects of the Sulphur Status of Three Quebec Soils

Abstract

Total sulphur, easily soluble sulphur, and the amounts of sulphur extracted by strongly acidic and strongly alkaline solutions were determined on samples from three Quebec soils, two podsols and one brown forest soil.Total sulphur was determined, following oxidation in the Parr oxygen bomb, by the colorimetric methylene blue method. The results obtained by this procedure were markedly higher than those obtained by the gravimetric method following bomb oxidation or oxidative fusion with sodium peroxide and sodium carbonate.Evidence was obtained suggestive of the existence of sulphate-sulphur in association with the organic fraction of these soils.

Performance of heterogeneous ZrO2 supported metaloxide catalysts for brown grease esterification and sulfur removal

“…In addition, metal ions can be removed from the organo-metal compounds by acid washing. This was also observed by Lowe and Delong who reported that roughly 33% of the total sulfur of analkaline soil extract was released as SO 2À 4 after an extraction treatment of 6 N HCl at 90°C for 12 h (Lowe and DeLong, 1961).It is known that the sulfur from the CAOAS linkage (ester sulfate) and CANAS linkage (sulfamate) can be removed by acid treatment (Freney, 1961)while preserving the CAS bond under this condition (Freney, 1958). It can be interpreted from these results that the amount of ester-sulfate and sulfamate in a sedimentary humic substance is similar to that of the brown grease recovered from wastewater.…”