Overall 0-1.5 hr 1.5-6 hr
K (hr-1 ) R2 K (hr-1) R2 K (hr-1) R2
MO 0.5363 0.9972 0.4628 0.9981 0.5661 0.998
NOM 0.0941 0.9691 0.1395 0.999 0.0772 0.9693
NOM+MO 0.3293 0.9709 0.1767 0.9293 0.396 0.9888
Table 5: Rate constant (K) and linear regression coefficients of photo-degrading methyl orange (MO), natural organic matter (NOM), and MO-contaminated NOM.