Competitive adsorption between Cu2+ and Ni2+ on corn cob activated carbon and the difference of thermal effects on mono and bicomponent systems

Campos, Natália Ferreira; Guedes, Giovanna A. J.C.; Oliveira, Leticia P.S.; Gama, Brígida Maria Villar da; Sales, Deivson Cesar Silva; Rodríguez-Díaz, Joan Manuel; Barbosa, C. M. B. M.; Duarte, Marta Maria Menezes Bezerra

doi:10.1016/j.jece.2020.104232

Cited by 35 publications

(19 citation statements)

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“…In the cereals group, corn presents the main format as a cob and stem. Its main applications are as follows: adsorption material (Campos et al 2020); to obtain cellulose Ditzel et al 2017;Longaresi et al 2019;Souza and Quadri 2014); biocatalysts (Bilal et al 2020); green composites (Ramos et al 2019); reinforcement polymers (Coiado et al 2017;Silvério et al 2013); and enzyme productor (Grigorevski-Lima et al 2009;Orlandelli et al 2017). Rice, on the other hand, is presented in the form of husks and husk bran from the cultivation.…”

Section: Scientific Literature Database Diagram On Agro-industrial Ma...mentioning

confidence: 99%

Brazilian Agro-industrial Wastes as Potential Textile and Other Raw Materials: a Sustainable Approach

et al. 2022

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The Brazilian agro-industrial chain generates about 291 million/tons/year of wastes, which, if inadequately destinated, could originate social and environmental risks. There is a growing need for the use of alternative raw materials to replace that originated from fossil resources in the Brazilian industry. Renewable materials play an important role on the sustainability of ecosystems and materials’ circularity. The issue has acquired importance in light of recent bio-based agro-fiber development potential applications. Considering sustainability guidelines, this study aimed to analyze the main Brazilian agro-industrial waste crops (temporary and permanent) as important sources of natural fibers and other raw materials. A systematic review of the literature (SRL) about Brazilian researches, based on concepts of industrial ecology, and the creation of a bibliometric analysis network were carried out. The agricultural biomass related to the main crops presents characteristics making them suitable to be applied for textiles, as natural fibers and polymers, in biosorbents for industrial effluents, and cellulose obtention and reinforcement material in composites. Thus, scientific investment in researches on materials and technology development are necessary to provide applications that could meet current and future demands and expand the scope of new materials for sustainability.

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Section: Scientific Literature Database Diagram On Agro-industrial Ma...mentioning

confidence: 99%

Brazilian Agro-industrial Wastes as Potential Textile and Other Raw Materials: a Sustainable Approach

et al. 2022

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“…Over the years, the demand for active carbon has increased considerably as a water-treatment agent to mitigate the environmental risks associated with water pollution. In recent years, the preparation of active carbon from cheap agricultural wastes, such as corn cob (Campos et al 2020), rice husks (Menya et al 2020), groundnut shell (Kumari et al 2020), durian shell (Wang et al 2020), walnut shells (Bae et al 2014), and so on, has drawn extensive attention from researchers. Some of these waste materials are potential precursors that could be employed to make valuable products, such as adsorbents.…”

Section: Introductionmentioning

confidence: 99%

Screening of factors that influence the preparation of Dialium guineense pods active carbon for use in methylene blue adsorption: a full factorial experimental design

2021

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Background The use of active carbons derived from waste biomass as adsorbents in the remediation of wastewater remains a valuable and cost-effective technology when compared to the use of commercial active carbon for the same purpose. This research aims at using a 2-level full factorial design (FFD) to efficiently evaluate factors that influence the preparation of active carbon from the waste pods of the Dialium guineense seeds. The influence of three preparation factors (concentration of the activating agent, activation time, and type of activating agent) on the active carbon yield and its adsorption capacity for methylene blue were investigated. Based on the full factorial design, two regression models were developed to correlate the factors to the two responses. From an analysis of variance (ANOVA), the most significant factors influencing each response were identified. The active carbon preparation conditions were then optimized by maximizing both the active carbon yield and its adsorption capacity for Methylene Blue. The functional group and surface morphology of the active carbon prepared under the predicted optimum conditions was analyzed via Fourier Transform Infra-Red (FTIR) spectroscopy and Scanning Electron Microscopy (SEM) respectively. Results The results of this study revealed that the concentration of the activating agent had the most significant effect on the yield of the active carbon produced as well as on its adsorption capacity for methylene blue. The optimum preparation process conditions were found to be: concentration of activating agent 5M, activation time 30 min and activating agent, NaOH which resulted in an active carbon yield of 21.25%, and an adsorption capacity of 9.33509 mg MB per gram of active carbon. SEM and FTIR showed evidence of successful activation. Conclusion The preparation of Dialium guineense seed pods' active carbon is strongly influenced by concentration and type of activating agent used. Reliable statistical models based on the FFD proved to be useful in identifying factors that significantly influence the preparation of Dialium guineense seed pods' active carbon. The active carbon holds great potential for application in the elimination of hazardous synthetic dyes from wastewater and should be explored further.

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“…A conversão de resíduos agroindustriais em adsorventes pode ser uma alternativa viável para remoção de poluentes de meios aquosos, além de possibilitar resolver dois problemas ambientais: 1) reciclar os resíduos sem valor agregado e 2) remediar o meio ambiente (Demiral;Cihan, 2016;Ghangale;Bholay;Saler, 2019;Pipíńka et al 2017). Vários materiais têm despertado um crescente interesse em pesquisa visando a produção de adsorvente a partir de precursores renováveis, como, cortiça (Krika 3 et al 2016), bagaço de cana (Chen et al 2017), casca de coco (Souza et al 2018), sabugo de milho (Campos et al 2020) e casca da avelã (Yakişik;Özveren, 2021).…”

Section: Introductionunclassified

Engenharia química: princípios fundamentais

2021

Engenharia Química: Princípios Fundamentais

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O emprego de polímeros intrinsecamente condutores, como a polianilina (PAni), tem-se apresentado como alternativa de revestimento protetor contra a corrosão, pois intensifica o efeito de passivação e proteção anódica do material. Diante da dificuldade em obterem-se filmes de PAni na forma oxidada e condutor de forma auto-suportados e coesos à superfície de substratos metálicos. Realizou-se a desdopagem do polímero, com o uso da solução de NH4OH passando a PAni para estado oxidado e não condutor conhecida como PAni esmeraldina base (PAni EB). A mistura completa da PAni EB, solvente orgânico e o plastificante 4-cloro-3-metilfenol, permitiram a obtenção de uma resina. Esta foi aplicada em placas de aço AISI 1006 com o auxílio equipamento Spin Coater. O filme foi caracterizado por análise térmica TGA, onde se verificou que o revestimento é resultado da reação dos componentes, predominando a estrutura da PAni EB. As análises térmicas demostraram no binder não apresenta alterações químicas que possam modificar as propriedades eletroquímicas da PAni, e os ensaios eletroquímicos de Voltametria Cíclica e Potencial de Circuito Aberto foram realizados em solução H2SO4 2 mol.L -1 , que indicou a formação de par redox polímero-metal, o que proporciona da formação de óxidos passivantes, que viabilizam a proteção anódica do metal contra a corrosão.

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Competitive adsorption between Cu2+ and Ni2+ on corn cob activated carbon and the difference of thermal effects on mono and bicomponent systems

Cited by 35 publications

References 54 publications

Brazilian Agro-industrial Wastes as Potential Textile and Other Raw Materials: a Sustainable Approach

Brazilian Agro-industrial Wastes as Potential Textile and Other Raw Materials: a Sustainable Approach

Screening of factors that influence the preparation of Dialium guineense pods active carbon for use in methylene blue adsorption: a full factorial experimental design

Engenharia química: princípios fundamentais

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