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An overview of geological originated materials as a trend for adsorption in wastewater treatment

Geoscience Frontiers 2022年第1期13卷 457-477页

作者： yasmin vieira Matias Schadeck Netto Éder C.Lima Ioannis Anastopoulos Marcos L.S.Oliveira Guilherme L.Dotto Chemistry Department Federal University of Santa Maria-UFSM1000Roraima Avenue97105-900 Santa MariaRSBrazil Chemical Engineering Department Federal University of Santa Maria-UFSM1000Roraima Avenue97105-900 Santa MariaRSBrazil Institute of Chemistry Federal University of Rio Grande do Sul(UFRGS)P.O.Box 1500391501-970 Porto AlegreRSBrazil Department of Chemistry University of CyprusP.O.Box 20537CY-1678 NicosiaCyprus Universidad de Lima Avenida Javier Prado Este 4600-Santiago de Surco 1503Peru Department of Civil and Environmental Universidad de la CostaCalle 58#55-66080002 BarranquillaAtlánticoColombia

Adsorption is a unit operation widely used for the tertiary treatment of the most diverse effluents,whose mechanism is based on removing recalcitrant compounds from the organic and inorganic *** this process,choosing a suitable adsorbent is a fundamental *** review article focuses on the adsorbents with natural geological origin:minerals,clays,geopolymers,and even wastes resulted from mining ***,over 450 articles and research papers were *** materials’main sources are described,and their characteristics,composition,and intrinsic properties are related to ***,we discuss the effects of several process parameters,such as p H,temperature,pollutant,and adsorbent ***,equilibrium,kinetics,and thermodynamic aspects are also addressed,and relevant regeneration prospects and final ***,some suggestions and perspectives on applying these adsorbents in wastewater treatment are presented as future trends.

关键词： Adsorption Equilibrium Geological-based adsorbents Process parameters Wastewater treatment

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Heterogeneous Photocatalytic Degradation of Dyes in Water/Alcohol Solution Used by the Brazilian Agate Industry

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Geomaterials 2019年第1期9卷 29-39页

作者： Clóvia Marozzin Mistura Ivo André Homrich Schneider yasmin vieira Passo Fundo University Passo Fundo Brazil Federal University of Rio Grande do Sul Porto Alegre Brazil Federal University of Santa Maria Santa Maria Brazil

The agate dyeing industry has been commonly seen as a high-pollution industry. Dyeing wastewater treatment is considered one of the most important categories for water-pollution control, because of its intense colour and the high concentration of organic contaminants. Most dyes used in the process present minimal biodegradability due to aromatic organic compounds in their structure. Using a photocatalytic reactor, experiments were carried out to study the decolorization of a water solution containing 8% ethylic alcohol and 200 mg L−1 of the dye Rhodamine B (RhB), the most difficult colorant to degrade among the used by the agate industry. The best conditions were further applied to treat the same agate water/ethyl alcohol solution containing a mixture of 200 mg L−1 of Rhodamine B (RhB), Crystal Violet (CV), Brilliant Green (BG), and Blood Red (BR). All the experiments were performed in a 2 L reactor equipped with ultraviolet (UV) lamps, at a wavelength of 365 nm, with powdered TiO2 or ZnO as the catalyst. The results indicated that the optimal decolorization conditions were attained with 2.5 g L−1 of the catalyst at pH 10 and an irradiation time of 80 min. The process resulted in complete degradation of CV, BG and 80% - 90% degradation of RhB and BR. The catalyst ZnO presented a performance somewhat better than TiO2. It is possible to conclude that the process of heterogeneous photocatalysis is effective for decolorization of water streams from the agate industry.

关键词： Agate Dye Rhodamine B Heterogeneous Photocatalysis Advanced Oxidation Process

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Highlighting COVID-19:What the imaging exams show about the disease

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World Journal of Radiology 2021年第5期13卷 122-136页

作者： Lorena Sousa de Carvalho Ronaldo Teixeira da Silva Júnior Bruna vieira Silva Oliveira yasmin Silva de Miranda Nara Lúcia Fonseca Rebouças Matheus Sande Loureiro Samuel Luca Rocha Pinheiro Regiane Santos da Silva Paulo Victor Silva Lima Medrado Correia Maria José Souza Silva Sabrina Neves Ribeiro Filipe Antônio França da Silva Breno Bittencourt de Brito Maria Luísa Cordeiro Santos Rafael Augusto Oliveira Sodré Leal Márcio Vasconcelos Oliveira Fabrício Freire de Melo Department of Instituto Multidisciplinar em Saúde Universidade Federal da BahiaVitória da Conquista 45029-094BahiaBrazil

Coronavirus disease 2019(COVID-19),a global emergency,is caused by severe acute respiratory syndrome coronavirus *** gold standard for its diagnosis is the reverse transcription polymerase chain reaction,but considering the high number of infected people,the low availability of this diagnostic tool in some contexts,and the limitations of the test,other tools that aid in the identification of the disease are *** this scenario,imaging exams such as chest X-ray(CXR)and computed tomography(CT)have played important *** is useful for assessing disease progression because it allows the detection of extensive consolidations,besides being a fast and cheap *** the other hand,CT is more sensitive for detecting lung changes in the early stages of the disease and is also useful for assessing disease *** note,ground-glass opacities are the main COVID-19-related CT *** emission tomography combined with CT can be used to evaluate chronic and substantial damage to the lungs and other organs;however,it is an expensive *** ultrasound(LUS)has been shown to be a promising technique in that context as well,being useful in the screening and monitoring of patients,disease classification,and management related to mechanical ***,LUS is an inexpensive alternative available at the ***,magnetic resonance imaging,although not usually requested,allows the detection of pulmonary,cardiovascular,and neurological abnormalities associated with ***,it is important to consider the challenges faced in the radiology field in the adoption of control measures to prevent infection and in the follow-up of post-COVID-19 patients.

关键词： SARS-CoV-2 COVID-19 Pneumonia Pandemic Radiology Tomography

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