Photostabilization of Phenoxyacetic Acid Herbicides MCPA and Mecoprop by Hydroxypropyl-β-cyclodextrin

Table 2

Kinetic parameters of MCPA and mecoprop photodegradation in different aqueous media.

Herbicide	Concentration; HP-β-CD (mM)	Water type	k (10^−3·h^−1)	𝑡1/2 (h)	𝑅^2
MCPA	0	Ultrapure	26.8±0.4	25.9±0.5	0.97
		River	23.0±0.6	30.1±0.6	0.99
	35	Ultrapure	8.6±0.3	80.6±0.9	0.99
		River	6.4±0.3	108.0±1.2	0.99
Mecoprop	0	Ultrapure	34.4±0.7	20.2±0.8	0.98
		River	15.0±0.5	46.2±0.7	0.99
	35	Ultrapure	10.9±0.4	63.6±0.6	0.99
		River	8.7±0.4	79.7±1.1	0.98