This work describes for the first time the photolytic and photocatalytic degradation of 6-chloronicotinic acid (6CNA) in water. Photolytic degradation revealed no change in concentration of 6CNA within 120 min of irradiation, while the photocatalytic degradation within 120 min, obeyed first-order kinetics. In photocatalytic experiments 46 ± 7% mineralisation was achieved within 120 min of irradiation. Efficiency of degradation was investigated through toxicity assessment with Vibrio fischeri luminescent bacteria and revealed higher adverse effects of treated samples on bacteria following photocatalytic degradation. New hydroxylated product generated in photocatalytic experiments with TiO, was confirmed with LC-ESI-MS/MS, GC-MS and¹H NMR.
COBISS.SI-ID: 1964027
Degradation of dimethoate under UV irradiation using TiO(2)/polymer films prepared by the layer-by-layer (LbL) method was investigated. The degradation was monitored using HPLC analysis and TOC measurements as a function of irradiation time, to see the change in concentration of dimethoate and mineralization, respectively. Complete degradation of dimethoate was achieved under TiO(2) optimum loading of 4 g/L at an UV irradiation time of 180 min.The degradation byproducts were analyzed and confirmed by GC-MS. Toxicity of the irradiated samples was measured using the luminescence of bacteria Vibrio fischeri after 30 min of incubation and the results showed more toxicity than the parent compound.
COBISS.SI-ID: 1972987