Overall 0-1.5 h 1.5-6 h
K(h-1) R2 K(h-1) R2 K(h-1) R2
MO 0.53 0.99 0.46 0.99 0.57 0.99
NOM 0.09 0.97 0.14 0.99 0.08 0.97
NOM+MO 0.33 0.97 0.18 0.93 0.40 0.99
Table 6: Rate constant (K) and linear regression coefficients of photo-degrading methyl orange (MO), natural organic matter (NOM), and MO-contaminated NOM.