Walkley-Black method for organic matter determination in soils contaminated by leachate

摘要

> size="2" face="Verdana">The present work is related to the study of potentialities of wet oxidation-redox titration (Walkley-Black) method for organic matter determination in soil samples contaminated by leachate from domestic solid wastes. The soil contamination by leachate was obtained experimentally, using leachate with high organic load (chemical oxygen demand ranging between 36.000 to 110.000 mg L-1) and two similar inorganic clay soils (organic carbon contents less than 1,4%), classified as Red Latosol. The results showed that Walkley-Black method has potential for organic matter determination in inorganic clay soil samples contaminated by leachate from domestic solid wastes. The correlation coefficients between expected and determined values ranged from 0.95 to 0.97 in soil samples studied.