Publications by authors named "Theodoro da Rosa Salles"
Article Synopsis
- This study explores the effective adsorption of the pesticide acephate using chitosan modified with varying amounts of magnetite through a simple co-precipitation method.
- The best results were achieved with a 1:1 chitosan to iron oxide ratio, achieving a 74.96% removal rate at pH 9.
- The process parameters such as pH, adsorbent dosage, and initial concentration significantly influenced the effectiveness, and the adsorption was confirmed to be exothermic and primarily chemical in nature, with high stability over multiple cycles.
2,4-Dichlorophenoxyacetic acid (2,4-D) is an herbicide and is among the most widely distributed pollutant in the environment and wastewater. Herein is presented a complete comparison of adsorption performance between two different magnetic carbon nanomaterials: graphene oxide (GO) and its reduced form (rGO). Magnetic functionalization was performed employing a coprecipitation method, using only one source of Fe, requiring low energy, and potentially allowing the control of the amount of incorporated magnetite.
View Article and Find Full Text PDFRenal neoplasms are highlighted as one of the 10 most common types of cancer. Renal cell carcinoma (RCC) is the most common type of renal cancer, considered the seventh most common type of cancer in the Western world. The most frequently altered genes described as altered are VHL, PBRM1, SETD2, KDM5C, PTEN, BAP1, mTOR, TP53, TCEB1 (ELOC), SMARCA4, ARID1A, and PIK3CA.
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- Salt stress is a major factor limiting plant growth, particularly affecting seed germination negatively due to high salt concentrations.
- This study investigated the effects of graphene oxide (GO) on the germination of Persian clover seeds under various salt stress conditions, using different concentrations of GO and sodium chloride.
- Findings showed that GO had a protective effect, helping to prevent the negative impacts of salt stress on seed germination, suggesting it could be a useful tool in agriculture to combat salinity issues.
Herein, tetracycline adsorption employing magnetic chitosan (CS·FeO) as the adsorbent is reported. The magnetic adsorbent was synthesized by the co-precipitation method and characterized through FTIR, XRD, SEM, and VSM analyses. The experimental data showed that the highest maximum adsorption capacity was reached at pH 7.
View Article and Find Full Text PDFDue to its wide use in anticonvulsant pharmacotherapy, phenobarbital (PHEN) is an aquatic contaminant with a high prevalence in the environment. In this adsorption study, chitosan and chitosan-based magnetic adsorbents containing different amounts of incorporated magnetite (CS, CS·FeO 1:1, CS·FeO 1:5, and CS·FeO 1:10) were used for phenobarbital removal. The magnetic adsorbents were synthesized by co-precipitation method and characterized through FTIR, XRD, MEV, and VSM analysis.
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