RESUMO
Effluent containing tartrazine can affect the environment and human health significantly prompting the current study into degradation using a sonochemical reactor operated individually and combined with advanced oxidation processes. The optimum conditions for ultrasound treatment were established as dye concentration of 10 ppm, pH of 3, temperature as 35 °C, and power as 90 W. The combination approach of H2O2/UV, H2O2/US, and H2O2/UV/US resulted in higher degradation of 25.44%, 57.4%, and 74.36% respectively. Use of ZnO/UV/US approach increased the degradation significantly to 85.31% whereas maximum degradation as 93.11% was obtained for the US/UV/Fenton combination. COD reduction was found maximum as 83.78% for the US/UV/Fenton combination. The kinetic analysis showed that tartrazine dye degradation follows pseudo first-order kinetics for all the studied processes. Combination of Fenton with UV and US was elucidated as the best approach for degradation of tartrazine.
Assuntos
Oxidantes , Tartrazina , Humanos , Peróxido de Hidrogênio , Cinética , Ferro , Monitoramento Ambiental , Raios Ultravioleta , OxirreduçãoRESUMO
ABSTRACT: A 71-year-old man, presenting with complaints of burning sensation and pain during urination, finally diagnosed with prostate carcinoma. Ultrasonography of the abdomen and pelvis revealed prostatomegaly. Serum PSA level was elevated, and TRUS-guided biopsy demonstrated acinar adenocarcinoma (Gleason score: 5 + 4 = 9). 68 Ga-PSMA-11 PET/CT for initial staging showed PSMA-avid enlarged prostate, pelvic lymphadenopathy, and focal PSMA uptake in the left side of the shaft of the penis. The patient also underwent a 64 CuCl 2 PET/CT, which demonstrated similar findings of enlarged prostate and adenopathy with focally increased tracer uptake in the shaft of the penis coinciding with the lesion observed on 68 Ga-PSMA-11 PET/CT, thereby detecting a rare metastatic site from carcinoma prostate.