Prof. André Leone Riguetti is a technical partner associated with Quantum’s discussions on water resources, environmental quality, sanitation, and advanced oxidation technologies. His trajectory connects academic activity, environmental management, water quality monitoring, and applied technical studies focused on the recovery and protection of aquatic systems.
His background reinforces the importance of combining technology, operational monitoring, regulatory awareness, and environmental responsibility in projects involving rivers, reservoirs, lakes, and water treatment systems.
The Moção de Aplausos e Congratulações recognizes André Leone Riguetti’s professional trajectory and contributions related to environmental management, water quality, sustainability, and water resources in Rio de Janeiro.
View recognition documentOriginal Portuguese title: Requalificação do Rio Maracanã com o uso do Polióxido de Cloro e Silício (POCS)
Original Portuguese title: Análise comparativa das tecnologias de oxidação química pelo Polióxido de Cloro e Silício (POCS) e a Unidade de Tratamento de Rios (UTR) visando a revitalização de rios
COMPARATIVO ENTRE POCS E OXIDANTES COMUNS
A complete comparison between oxidant technologies should go beyond the nominal purchase cost of chemical inputs. Technical and economic evaluation should also consider useful oxidative efficiency, specific consumption, operating stability, formation of byproducts, regulatory requirements, safety infrastructure, environmental externalities, and total system cost.
This section summarizes the technical note provided for this project. Performance depends on water matrix, operating conditions, dosage, monitoring, and treatment objectives.
| Criterion | Conventional oxidants, such as chlorine gas and sodium hypochlorite | POCS |
|---|---|---|
| Predominant mechanism | Halogenation and partial oxidation. | Direct oxidation by electron transfer, according to the technical note. |
| Useful oxidative efficiency | May be reduced by side reactions with organic matter, nitrogen compounds, and other constituents. | Technical note indicates higher use of the applied oxidative potential in appropriate applications. |
| Specific consumption | May require higher dosage in complex matrices or when side reactions consume oxidant. | Technical note indicates the possibility of lower operational dosage in certain applications. |
| pH dependence | Higher sensitivity to pH and water chemistry. | Technical note indicates greater stability across different operating conditions. |
| Byproduct formation | Can form disinfection byproducts such as THMs, HAAs, chloramines, and other organochlorinated compounds. | Technical note indicates significant mitigation of organochlorinated byproduct formation under appropriate operating conditions. |
| Corrosivity and asset impact | Can contribute to corrosion and accelerated wear of equipment and infrastructure. | Technical note indicates reduced operational impact on assets. |
| Operational safety | Higher complexity, especially where chlorine gas storage, containment, and contingency systems are required. | Technical note indicates lower safety and handling complexity. |
| System-level economics | Direct chemical cost may not reflect indirect costs related to safety, maintenance, monitoring, and compliance. | Technical note indicates a potentially better balance between performance, safety, and total system cost. |