TOC was determined by the dichromate wet oxidation method (Nelson and Sommers, 1982), LOCwas determined following themethod of Blair et al. (1995) and Vieira et al. (2007)
TOC was determined by the dichromate wet oxidation method(Nelson and Sommers, 1982), LOCwas determined following themethodof Blair et al. (1995) and Vieira et al. (2007)