Valorization of Agroindustrial Wastes as Biosorbent for the Removal of Textile Dyes from Aqueous Solutions

Contreras, Elsa Galarza; Sepúlveda, L.; Palma, C.

doi:10.1155/2012/679352

Cited by 34 publications

(19 citation statements)

References 31 publications

(39 reference statements)

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“…So far BSG was mostly used as feed or has been landfilled, and its exploitation as a valuable renewable resource has been neglected. [25] However, different investigations were conducted in order to evaluate BSG as an adsorbent for the removal of synthetic dyes, namely acid dyes -green, yellow, blue and orange 7, [20,26,27] Basic Blue 41, Reactive Black 5, and Acid Black 1, [28] malachite green, [15] methylene blue, [19] and Congo red. [29] Methylene blue (MB) is a cationic (basic) dye most commonly used for cotton, silk and leather dyeing.…”

Section: Introductionmentioning

confidence: 99%

Lignocellulosic Materials as Dye Adsorbents: Adsorption of Methylene Blue and Congo Red on Brewers’ Spent Grain

et al. 2018

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Brewers' spent grain (BSG), a lignocellulosic waste material, was evaluated as a low-cost adsorbent for the removal of synthetic dyes methylene blue (MB) and Congo red (CR) from aqueous solutions in a batch process. Characterisation of the BSG was performed by chemical analysis, FTIR and SEM. The effects of contact time, initial dye concentration, adsorbent particle size, adsorbent concentration and pH on the adsorption process were investigated. High removal of both dyes ranging from 70 to over 90 % was achieved. It was shown that in both cases (MB and CR adsorption) the process could be interpreted in terms of Langmuir and Freundlich adsorption isotherms. The kinetics of the adsorption process was well described by the pseudo-second-order model. The results indicated the potential use of BSG as a low-cost adsorbent for MB and CR dye removal from aqueous solutions.

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Section: Introductionmentioning

confidence: 99%

Lignocellulosic Materials as Dye Adsorbents: Adsorption of Methylene Blue and Congo Red on Brewers’ Spent Grain

et al. 2018

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“…Na literatura são encontrados valores de pH PCZ 3,5 e 6,0 para cascas de laranja secas em estufa 28,29 e 6,33 para carvão ativado produzido a partir de casca de laranja. 30 Carvões ativados comerciais apresentam valores de pH PCZ em torno de 9,5.…”

Section: Figura 5 Representação Gráfica Do Ph Pczunclassified

Characterization and Evaluation of the Orange Peel Adsorptive Properties in the Dye Direct Blue 86 Removal

Formica¹,

Brudzinski²,

Carvalho³

et al. 2017

Rev. Virtual Quim.

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Abstract:The use of powdered from orange peel (Citrus sinensis) as low cost adsorbent for the removal of the dye Direct Blue 86, routinely used in the textile industry, was the objective of this work. A porous structure compatible with the adsorption of molecules with dimensions of up to 15 micrometers was verified in the characterization of the orange peel powder (OPP). The OPP answered the ABNT NBR 2133 norm showing lower humidity content of 8%. The ash content indicated few impurities in the material, with a value of (2.79 ± 0.06)%. The methodology used in adsorption experiments did not allow quantification of the dye in the solutions, leading to an investigation of the possible causes. The results showed the D-limonene, orange peel component, as responsible for the non-viability of the methodology employed, so it was not possible to quantify the study through the contact time of variation (adsorption kinetics), pH, temperature and adsorption isotherm by this method.Keywords: Adsorption; Agro-industrial waste; Spectroscopy; Textile Industry; Color removal. ResumoO uso de pó de casca de laranja (Citrus sinensis) como adsorvente de baixo custo na remoção do corante Direct Blue 86, usado rotineiramente na indústria têxtil, foi o objetivo deste trabalho. Um estrutura porosa compatível com a adsorção de moléculas com dimensões de até 15 m foi verificada na caracterização do pó da casca da laranja (PCL). O PCL atendeu a norma ABNT NBR 2133 apresentando teor de umidade abaixo de 8%. O teor de cinzas indicou poucas impurezas no material, com valor de (2,79 ± 0,06)%. A metodologia empregada nos ensaios de adsorção não permitiu a quantificação do corante nas soluções, levando a uma investigação das possíveis causas. Os resultados apresentaram o D-Limoneno, componente da casca da laranja, como responsável pela inviabilização da metodologia empregada, portanto, não foi possível quantificar o estudo através da variação de tempo de contato (cinética de adsorção), pH, temperatura e isoterma de adsorção através deste método.

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“…The released dye in water streams represents a risk of ecotoxicity and a potential danger of bioaccumulation. The transport of these contaminants through the food chain could even affect human health [1].…”

Section: Introductionmentioning

confidence: 99%

Low-cost Adsorbents Derived from Agricultural By-products/Wastes for Enhancing Contaminant Uptakes from Wastewater: A Review

Sulyman

Namieśnik

Gierak

2017

Pol. J. Environ. Stud.

201

112

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A major threat to the comfort of human life has been imposed by increased industrialization and urbanization. The generation and disposal of huge amounts of toxic materials and pollutants have heavily contaminated our environment. Some Organics such as synthetic dyes (SD) and heavy metals (HM) are becoming increasingly prevalent as the most dangerous pollutants in soil and surface water environments. They are causing great concern worldwide due to their toxicity to many life forms.Environmentally friendly utilization of agricultural by-products/waste materials either as raw materials or in production of so-called activated carbons (AC) is an important issue. Because it is apparent from our literature review that the main factors characterizing these materials are their affordability, local availability, and efficiencies in removing many unwanted toxics and pollutants, they therefore could be utilized instead of more conventional but expensive adsorbent materials, particularly in developing countries where many industries lack appropriate individual sewage treatment systems; even where they exist, they lack satisfactory functioning and maintenance because of the lack of good budgets.A number of case studies are supplied in this review. These case studies have pointed to the efficient removal of SD/HM ions from aqueous solutions by the agricultural by-products/wastes in the form of a raw material, signifying spent tea leaves (STL) as a good example. Besides, the efficient removal of such ions by AC produced from these agricultural by-products/wastes has also been given in detail, suggesting a variety of AC agricultural by-products/wastes sources. Both kinds are widely used adsorbents in the treatment of wastewaters. Our review has shown that these adsorbents are characterized by many exceptional physical and chemical features that make them widely used adsorbents in the treatment of wastewaters. The adsorption efficiencies by these substances were also affected by the characteristics of AC, which depend on the physical and chemical properties of the precursor (i.e., agricultural by-products/wastes) as well as on the activation method applied, which is either chemical or physical. The structural properties of the resulting

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Valorization of Agroindustrial Wastes as Biosorbent for the Removal of Textile Dyes from Aqueous Solutions

Cited by 34 publications

References 31 publications

Lignocellulosic Materials as Dye Adsorbents: Adsorption of Methylene Blue and Congo Red on Brewers’ Spent Grain

Lignocellulosic Materials as Dye Adsorbents: Adsorption of Methylene Blue and Congo Red on Brewers’ Spent Grain

Characterization and Evaluation of the Orange Peel Adsorptive Properties in the Dye Direct Blue 86 Removal

Low-cost Adsorbents Derived from Agricultural By-products/Wastes for Enhancing Contaminant Uptakes from Wastewater: A Review

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