Using a 16-W low-pressure Hg lamp photoreactor emitting light at 254 nm, a series of pesticides were subjected to photodegradation in distilled water. The concentrations, absorbances, and quantum yields are given below:
The emitted light intensity of the lamp was I0 = 7.1 × 10-8 einstein/L s. Estimate the half-lives of the pesticides in water.