Microbial Degradation of Basic Dyes in Wastewaters - Microbial Degradation of Synthetic Dyes in Wastewaters - page 98

Fig. 1 Proposed N-demethylation pathway for decolorization of Methyl violet by Aspergillus sp.
strain CB-TKL-1 (Kumar et al. 2011 ). The different degradation intermediates of Methyl violet (1, m/
z = 371.6) = N,N,N ′ ,N ′ ,N ″ ,N ″ -hexamethylpararosaniline identi ed by LC-ESI-MS were DDMPR (2,
m/z = 358.2) = N,N-dimethyl-N ′ ,N ′ -dimethyl-N ″ -methyl pararosaniline; DMMPR (3, m/
z = 344.1) = N,N-dimethyl-N ′ -methyl-N ″ -methyl pararosaniline; DDPR (4, m/z = 344.1) = N,N-
dimethyl-N ′ ,N ′ -dimethyl pararosaniline;MMMPR (5, m/z =330.1) =N-methyl-N ′ -methyl-N ″ -methyl
pararosaniline; DMPR (6, m/z = 330.2) = N,N-dimethyl-N ′ -methyl pararosaniline; MMPR (7, m/
z =316.1) =N-methyl-N ′ -methyl pararosaniline; DPR (8, m/z =318.3) =N,N-dimethyl pararosaniline;
MPR (9, m/z = 305.2) = N-methyl pararosaniline; PR (10, m/z = 287.7) = pararosaniline]