Widad has completed her PhD degree in Phytochemistry from the University of Reading, UK. She was an Assistant Professor at the College of Pharmacy, Al-Mustansiriya University, Iraq in 2004 and currently, she is Dean of the College of Pharmacy, Al-Mustansiriayah University. Her research interest includes photochemistry, pharmaceutical chemistry and chromatography. She has published several papers in reputed journals in the field Pharmaceutical Chemistry.

Chenopodium album L the Greek name Chenopodium means goose foot. The plant is native to Asia and Europe. The analysis of the constituents of the plant was performed using gas chromatography and HPLC techniques. The presence of kaempferol was detected by TLC and HPTLC in comparison with standard kaempferol. Kaempferol 3-O-β-glucoside (astragalin) was detected as the major glycoside in the polar fraction by TLC and HPTLC comparing with astragalin standard. Astragalin was isolated from Iraqi plant as yellow powder by column chromatography and further purified by preparative TLC and combined with isolated astragalin from preparative HPLC. Further identification of the compound was performed by 1H-NMR spectroscopy. Sterols of the plant were analyzed using GC-MS analysis. The major sterols with M+416 could not be identified by the data base even the similarity index was 81.

Douglas Braga Santos graduated in Chemical Technician course in 2013 and began his Undergraduate studies in 2014 in the Bachelor of Chemistry course, finishing in July 2018. He applied for Master applications for the second semester of the same year with the intention of giving segment the study line addressed in the Undergraduate work. He has experiences on chemical, working in quality control and as a Technical Responsible in a food company.

The objective of this research was to characterize the effluent to be treated, as well as the efficacy and behavior of titanium dioxide when applied together in presence of sunlight to perform a photocatalytic process. Several important points were considered for a better degradation of components present in the effluent, as well as the angle of inclination of the galvanized plate used in the photocatalytic experiment, concentration of the catalyst used and maximum sample distribution in the form of a water slide under the plate for greater contact with the solar spectrum. To perform the tests, the titanium dioxide catalyst of the Degussa® brand was used as suspension to provide a better interaction between sample and semiconductor and this was done in a reactor produced by the author himself who used solar radiation as a calorimetric source and radioactive. The pH, turbidity, total solids, conductivity, true color and plating parameters were evaluated in the raw effluent for characterization purposes and in the effluent after the treatment. The results indicated that the heterogeneous photocatalysis met the objectives proposed for the conclusion of this research, because it was efficient to degrade matter present in the medium which was inserted in association with the selected catalyst. The physico-chemical characterization of the effluent had an important role in the final result of the heterogeneous photocatalysis. It was efficient both to oxidize organic matter present in the effluent and also oxidized biological material as indicated in the results obtained in the plating analysis.