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the uv photolysis of ketoprofen, diclofenac and atenolol was investigated and the following conclusions are taken from this study: • decadic molar absorption coefficient and quantum yield values indicated high photodegradation for ketoprofen, followed by diclofenac, and low photolysis for atenolol; • time- and fluence-based rate constants determined in pure water confirmed these kinetics, suggesting that ketoprofen, and to a certain extent diclofenac, can be adequately removed in mp/uv disinfection systems. lp/uv photolysis of ketoprofen at 1500 mj cm−2 showed a lower extent of degradation. • the presence of other phacs in pure water or of other organic compounds in filtered treated wastewater seemed to reduce-the photodegradation kinetics of the studied phacs. however, photodegradation of ketoprofen and atenolol was higher in unfiltered than in filtered wastewater, suggesting increased indirect photolysis from free radicals arising from particulate organic matter. • mp/uvphotolysisproducts of ketoprofen, diclofenac and atenolol were identified and monitored throughout the irradiation time. this enabled the proposal of phototransformation pathways and the identification ofthe most persistenttransformation products, which are possibly discharged from wwtp using direct photolysis for disinfection. in the future, it is important to assess the toxicity and environmental persistence of these intermediates, and if necessary, investigate complementary solutions for their mitigation
fotolisis uv ketoprofen, diklofenak dan atenolol telah diselidiki dan kesimpulan berikut diambil dari penelitian ini: • koefisien absorpsi molar dekadik dan nilai luluh kuantum menunjukkan fotodegradasi tinggi untuk ketoprofen, diikuti oleh diklofenak, dan fotolisis rendah untuk atenolol; • konstanta laju berdasarkan waktu dan kelancaran yang ditentukan dalam air murni menegaskan kinetika ini, menunjukkan bahwa ketoprofen, dan sampai batas tertentu diklofenak, dapat dihilangkan secara memadai dalam disin mp / uv