Mariana Consiglio Kasemodel

Objective: This study explores the contribution of aluminum recycling to socio-environmental sustainability, from the standpoint of circular economy and environmental management. Method: This study employed a qualitative research methodology through a literature review on aluminum recycling, circular economy, and socio-environmental sustainability. Content analysis techniques were applied to the data to identify patterns, trends, and significant relationships. Results and Discussion: This study shows that adopting Solid Waste Management Practices (SWMP) can recover up to 98% of waste, significantly cut operational costs, and boost a company's image for environmental responsibility. Aluminum recycling is an environmentally and economically smart way to cut down on environmental damage. It saves up to 95% of the energy needed to produce new aluminum and significantly lowers CO₂ emissions. The study highlights energy savings, reduction in greenhouse gas emissions, and waste management practices.

This research investigates the adsorption potential of mango and pitanga tree pruning waste biochar produced at 300 °C and 500 °C for the uptake of Methylene Blue (MB) dye. The particle size of biochar, initial MB concentration, adsorbent mass and pH of the solution were varied. Equilibrium data were modeled using Langmuir, Freundlich and Temkin equations. Increasing the temperature of the treatment resulted in a slight increase in the efficiency and adsorption capacity of the material. Finer particles (6) were more efficient in adsorbing MB. Both materials presented similar modeled parameters for Langmuir, Freundlich and Temkin isotherm equations. The adsorption at equilibrium of MB is best described by Langmuir and Freundlich models, and the modeled maximum adsorption capacity values are 20.53 ± 5.47 mg g⁻¹ for BTP-300 and 23.40 ± 6.41 mg g⁻¹ for BTP-500, proving the biochar’s efficiency in the adsorption of MB and that the temperature of the thermochemical process did not affect q_m.

This research investigates the adsorption potential of four types of adsorbents produced from agro-industrial waste (grape pomace—GP, tree pruning—TP, sugarcane bagasse—SB, and eucalyptus sawdust—ES) for the uptake of thiazine dye methylene blue (MB) from aqueous solution. A kinetic model based on a hybrid-order rate equation was fitted to experimental data. The result showed that BGP-300 presented the highest mass yield (58.84%) and energy yield (69.56%), followed by BTP-300 > BES-300 > BSB-300. Adsorption studies showed that BGP-300 had a better performance in the uptake of MB, with a removal efficiency (R_e) of 96.5% and adsorption capacity at equilibrium (q_e) of 9.3 mg g⁻¹, followed by tree pruning biochar (BTP-300), with an R_e of 65.0% and q_e of 5.3 mg g⁻¹. Meanwhile, eucalyptus sawdust (BES-300) and sugarcane bagasse (BSB-300) biochar did not facilitate any significant removal of MB. Adsorption kinetics is best described by a second-order rate with R² varying from 0.75 to 0.96. Desorption studies show a low concentration released to the solution, indicating that adsorption may occur physically and chemically. Therefore, this research provides comprehensive insights into the adsorption characteristics of different biochars, emphasizing the potential of torrefied materials BGP-300 and BTP-300 as effective for MB uptake from aqueous solution.

This research investigates the adsorption potential of mango and pitanga tree pruning waste biochar produced at 300 °C and 500 °C for the uptake of Methylene Blue (MB) dye. The particle size of biochar and initial MB concentration were varied. Equilibrium data was modeled using Langmuir, Freundlich and Temkin equations. It was found that the pyrolysis process and the initial dye concentration directly influence the adsorption process. Increasing the temperature of the treatment resulted in an increase in the efficiency and adsorption capacity of the material. Finer particles (< 0.25 mm) were more efficient in adsorbing MB. Both materials presented similar modeled parameters for Langmuir Freundlich and Temkin isotherm equations. The adsorption at equilibrium of MB is best described by Langmuir and Freundlich models, and the modeled maximum adsorption capacity of both materials is 19.4 mg g^-1, proving its efficiency in the adsorption of MB and that the temperature of thermochemical process did not affect q_m.

This research investigates the adsorption potential of four types of absorbents produced from agro-industrial waste (grape pomace - GP, tree pruning - TP, sugarcane bagasse - SB and eucalyptus sawdust - ES) for the uptake of Methylene Blue (MB) dye from aqueous solution. A kinetic model based on a hybrid-order rate equation was fitted to experimental data. The result showed that from the biochars obtained in dry torrefaction at 300 ºC - 60 min, BGP-300 presented the highest mass yield (58.84%) and energy yield (69.56%), followed by the BTP-300 > BES-300 > BSB-300. Adsorption studies showed that BGP-300 had a better performance in the uptake of MB, with removal efficiency (R_e) of 96.5% and adsorption capacity at equilibrium (q_e) of 9.3 mg g-1, followed by tree pruning biochar (BTP-300), R_eof 65.0% and q_eof 5.3 mg g-1. Whereas eucalyptus sawdust (BES-300) and sugarcane bagasse (BSB-300) biochar did not provide significant removal of MB. Adsorption kinetic is best described by second order rate with R² varying from 0.75 to 0.96. Desorption studies show a low concentration released to the solution, indicating that adsorption may occur physically. Therefore, this research provides comprehensive insights into the adsorption characteristics of different biochar, emphasizing the potential of BGP-300 and BTP-300 as effective for MB uptake from aqueous solution.

O presente estudo investiga a climatologia de 10 anos (2013-2022) das concentrações de poluentes atmosféricos na Região Metropolitana do Vale do Paraíba e Litoral Norte (RMVP). Utilizando dados de satélites e reanálises, foram analisados os padrões sazonais de monóxido de carbono (CO), dióxido de enxofre (SO2), material particulado fino (MP2.5), carbono orgânico (OC), carbono negro (BC) e profundidade óptica de aerossóis (AOD). Os resultados indicam que a poluição na RMVP apresenta padrões sazonais distintos, sendo influenciada por fatores como queimadas, emissões industriais e transporte de poluentes. O CO e MP2.5 exibem picos nos meses de agosto a setembro, associados às queimadas, enquanto o SO2 apresenta maiores concentrações entre maio e agosto, devido a emissões industriais e veiculares. O produto de maior resolução do AGAC para MP2.5 revela uma intensificação da pluma de MP2.5 na região durante a estação seca, destacando a importância de dados de alta resolução para monitoramento da qualidade do ar. A redução das emissões e o aprimoramento dos sistemas de monitoramento da qualidade do ar são essenciais para mitigar os impactos da poluição atmosférica na saúde pública. Sugere-se a inclusão de NO2 e FRP em futuras análises para uma compreensão mais completa da dinâmica dos poluentes na região.

A maioria dos solos brasileiros tem severas limitações hídricas para o crescimento das culturas e, portanto, podem se beneficiar de correções orgânicas. Este estudo avaliou o uso de biocarvão de fibra de coco (BFC) como material para melhoramento geotécnico de solo arenoso. Para isso, foram utilizadas amostras de latossolo vermelho-amarelo com 10% de BFC comercial. As amostras foram submetidas a ensaios de pH, condutividade elétrica (CE), granulometria, limite de plasticidade (LP) e limite de liquidez (LL). Nas análises de pH e CE foi observado que o solo possui característica ácida (pH = 4,8), ΔpH médio de -0,6 e CE de 41,7 µS cm-1. Ao adicionar o BFC, houve um aumento nos valores de pH (média de 6,3 e ΔpH -1,3), CE (80,7 µS cm-1), LP (3.1 a 3.3% solo nat e 3.4 a 4.1% solo bio) LL (13,9 a 17,2% solo nat e 17.2 a 19.6% solo bio). O aumento do valores de LL e LP implica na melhoria da absorção de água pelo solo, minimizando sua degradação. Conclui-se que o BFC é um material alternativo que pode ser empregado para a melhoria de solos, no entanto, as alterações físico-químicas devem ser mais investigadas.

Pantanal fires have a significant impact on the environment. Anthropogenic emissions of residual gases have changed the tropospheric composition in this region due to burning. This study aims to analyze the spatial patterns of atmospheric pollutants (including carbon monoxide (CO), nitrogen dioxide (NO₂), black carbon (BC), organic carbon (OC) and sulfur dioxide (SO₂) and aerosol optical depth, along with fire outbreaks across the Pantanal biome from 2016 to 2021. The data collected is based on remote sensing data. The fire outbreaks peaked pollutant concentrations reached their highest between June to November, particularly during the drier months of August to October. This increase was even greater during the last three years (2019-2021), especially in 2020, when the average CO, NO₂, SO₂, BC, and OC concentrations increased by 29%, 31%, 50%, 52%, and 50%, respectively. The rainfall values do not justify the increase in the number of fire outbreaks between 2019 and 2021, indicating that the rise is likely due to increased burning. In 2021, the average monthly rainfall was 48% greater than that in 2016-2020 but it had the highest FRP value and the second highest fire outbreak number and pollutant concentration. The 2020 year experienced a record number of fire outbreaks and the highest levels of pollutants in the atmosphere in the region for this period.

The objective of this work was to evaluate the physicochemical and adsorptive characterization of Fe tailing collected in the district of Brumadinho; and verify its effect on Raphanus sativus germination. The material was collected on the surface layer (0-20 cm) and disintegrated for pH, redox potential – Eh, electrical conductivity – EC, OM, cation exchange capacity – CEC, specific surface area – SSA and functional groups characterization. Adsorption studies were conducted using methylene blue (MB). The results of the adsorption studies were analyzed using kinetic models (Elovich, pseudo-first order – PFO and pseudo-second order – PSO) and isotherm models (Freundlich, Langmuir and Sips). The tailing has an acidic pH (5.60), negative ΔpH (-0.30) and low CEC (1.85 cmol_c g^-1). A high MB adsorption efficiency (96%) was verified. The Elovich model (0.924822 = 0.9609). The maximum adsorption capacity (q_m) was equal to 15.08 mg g^-1. The presence of Fe tailing positively influenced the germination of R. sativus seeds (73.8%), but stem and root growth were inferior when compared to seedlings cultivated in compost substrate. It is concluded that the material has favorable cationic adsorption capacity, which can benefit soil fertilization. However, R. sativus development was minor in Fe tailing substrate, probably due to low CEC, OM and nutrient availability.