Publications by authors named "Alan Nelson Arenhart Heberle"
The present paper deals with the atenolol (ATL) degradation by advanced anodic oxidation using a boron-doped diamond anode supported on niobium (Nb/BDD). Cyclic voltammetry performed on this electrode revealed that it presents a high quality (diamond-sp/sp-carbon ratio), high potential for OER and that ATL can be oxidized directly and/or indirectly by the electrogenerated oxidants, such as hydroxyl radicals, persulfate ions and sulfate radicals. Electrolysis experiments demonstrated that ATL degradation and mineralization follow a mixed (first and zero) order kinetics depending on the applied current density.
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- Advanced oxidation processes are being developed to address the environmental harm from emerging contaminants, but can produce toxic byproducts.
- The study focused on the effects of 2,4,6-tribromophenol (TBP) on the germination and root health of L. sativa and A. cepa, showing that UV treatment methods like direct photolysis increased toxicity while heterogeneous photocatalysis and photoelectrolysis did not.
- Results indicate that different UV treatments lead to varying levels of phytotoxicity and genotoxicity, highlighting the need for thorough assessments of new treatment methods and their byproducts.
Antibiotics are not efficiently removed in conventional wastewater treatments. In fact, different advanced oxidation process (AOPs), including ozone, peroxide, UV radiation, among others, are being investigated in the elimination of microcontaminants. Most of AOPs proved to be efficient on the degradation of antibiotics, but the mineralization is on the one hand not evaluated or on the other hand not high.
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