Photo-degradation of alfalfa saponins by UV–visible multi-wavelength irradiation

A photochemical treatment with UV multi-wavelength irradiation was applied to investigate the degradation of saponins mixture obtained from alfalfa leaves. The photo-degradation studied in an aqueous solution at a pH range 4–7 and temperature 20–80 °C. samples were irradiated for 80 min using mid-pressure mercury lamp emission wavelengths between 250 740 nm. dependence absorbed radiation on concentration evaluated, linear found concentrations experimented throughout photo-degradation. 470 610 nm maximum absorption peak 543 This means that any emitting within this wavelength could produce some degree reaction mechanism proposed, matching experimental pseudo-first-order kinetic model best fitted evolution concentration. rate increase increasing decreasing value, causing reduction 80% after 4