ANÁLISE DO PÓ DA CASCA DE JUREMA PRETA (MIMOSA HOSTILIS BENTH) COMO ADSORVENTE DE CORANTES TÊXTEIS EM MEIO AQUOSO

2021 ◽  
Author(s):  
Felipe Tonon Firmino ◽  
Erik Cavalcante Dybwad ◽  
Paulo Henrique Dos Santos Silvares ◽  
Araceli Verónica Flores ◽  
Joselito Nardy Ribeiro
Keyword(s):  
Indigo Blue

Introdução: Com o advento da ampliação das indústrias e do desenvolvimento populacional, problemas ambientais tornaram-se cada vez mais recorrentes e graves. Destaca-se a quantidade de efluentes gerados pelas indústrias têxteis, que, caso não mitigados, podem causar sérios problemas relacionados à contaminação ambiental e risco à saúde humana. Dentre os corantes utilizados por indústrias têxteis, destaca-se o azul de metileno (MB), empregado como corante bacteriológico e como indicador químico e o Indigo Blue (IB), usado no tingimento de tecidos. Tendo em vista os problemas gerados pela emissão das corantes, tecnologias que permitam a remoção desses poluentes em água são de extrema importância para o cenário socioambiental. Nessa assertiva, existe o processo de adsorção, que quando aliado a adsorventes de baixo custo operacional se tornam uma alternativa viável de mitigação dos problemas gerados. Objetivo: O objetivo da pesquisa almejou avaliar o potencial do pó da casca de Jurema Preta (Mimosa hostilis Benth) (PCJ) em remover dois corantes têxteis diluídos em água. Material e métodos: Foram feitas análises espectrofotométricas e de microscopia. As Capacidades Máximas Adsortivas (CMA) para os corantes MB e IB foram obtidas através do Modelo Matemático de Langmuir, que permite verificar quantos gramas de corante se aderem a 1g de adsorvente. Resultados: As análises físico-químicas mostraram que este material possui superfície heterogênea (com reentrâncias) e grupamentos químicos capazes de interagir e retirar os poluentes químicos da água. As CMA se revelaram satisfatórias, como comparado e averiguado em outras bibliografias. Além disso, os resultados relacionados as análises demonstraram que é possível obter uma adsorção eficiente de MB e IB quando associados ao PCJ. Porém, notou-se menor CMA para MB (3,5 mg/g) em relação a IB (115,21 mg/g), e isso pode ocorrer, pois as interações físico-químicas entre IB e PCJ podem ser mais fortes que as interações entre PCJ e MB. Conclusão: Sendo assim, os resultados dessa pesquisa sugerem o PCJ como uma nova alternativa na remoção dos corantes MB e IB em meio aquoso, mas havendo necessidade de investigação de outros parâmetros.

scholarly journals Spectrophotometric investigation of the Fe(III)-disulphonate hydroquinone complex

2005 ◽  
Vol 70 (4) ◽  
pp. 651-659
Author(s):  
Mirjana Obradovic ◽  
Snezana Mitic ◽  
Snezana Tosic ◽  
A.N. Pavlovic
Keyword(s):  
Stability Constant ◽  
Spectrophotometric Method ◽  
Calibration Curve ◽  
Relative Stability ◽  
Time Stability ◽  
Acid Media ◽  
Influence Of Temperature ◽  
Complex Dependence ◽  
Indigo Blue

Iron(III) form an indigo-blue complex with the disulphonated product of hydroquinone (K2S2Hy) in acid media with an absorption maxima at 600 nm. The time stability of the complex, dependence of the complex absorbance on pH and the influence of temperature and solvent were followed on the basis of spectrophotometric measurements. Using the Job, mole ratio and Henry?Franck?Ostwald methods, the composition and relative stability constant of this complex, in 80 vol.% ethanol as solvent, were determined (1:1;log??293 = 3.37). A new spectrophotometric method for the determination of iron has been developed and the calibration curve is linear in the concentration range from0.65 to 6.45 ?g cm-3. The effects of foreign ions on the determination of iron were investigated in order to assess the selectivity of the method. The method was applied for the determination of Fe(III) in the natural juice of beet.

scholarly journals XVIII. On rubian and its products of decomposition

1851 ◽  
Vol 141 ◽  
pp. 433-459 ◽  
Keyword(s):  
Chemical Change ◽  
The State ◽  
Common Origin ◽  
Yellow Colour ◽  
Atmospheric Air ◽  
Indigo Blue ◽  
The Subject ◽  
The Many ◽  
Do So ◽  
Madder Root

Among the many discussions to which the subject of madder has given rise among chemists, there is none which is calculated to excite so much interest as that concern­ing the state in which the colouring matter originally exists in this root, and there is no part of this extensive subject which is at the same time involved in such obscurity. It is a well-known fact that the madder root is not well adapted for the purposes of dyeing until it has attained a growth of from eighteen months to three years, and that after being gathered and dried it gradually improves for several years, after which it again deteriorates. During the time when left to itself, especially if in a state of powder, it increases in weight and bulk, in consequence probably of absorp­tion of moisture from the air, and some chemical change is effected, which, though not attended by any striking phenomena, is sufficiently well indicated by its results. There are few chemical investigations that have thrown any light on the nature of the process which takes place during this lapse of time, and in fact most of the at­tempts to do so have merely consisted of arguments based on analogy. It has been surmised that the process is one of oxidation, and that the access of atmospheric air is consequently necessary. We are indeed acquainted with cases, in which substances of well-defined character and perfectly colourless, as for instance orcine and hematoxyline, are converted by the action of oxygen, or oxygen and alkalies combined, into true colouring matters. A more general supposition is, that the process is one of fermentation, attended perhaps by oxidation, and in confirmation of this view the formation of indigo-blue from a colourless plant, by a process which has all the cha­racters of one of fermentation, may be adduced. What the substance is however on which this process of oxidation or fermentation takes effect, what the products are which are formed by it, whether indeed the change is completed as soon as the madder has reached the point when it is best adapted for dyeing, or whether further changes take place when it is mixed with water and the temperature raised during the process of dyeing, are questions which have never been satisfactorily answered, if answered at all. It has indeed been suspected by several chemists, that there exists originally some substance in madder, which by the action of fermentation or oxida­tion is decomposed and gives rise by its decomposition to the various substances endowed either with a red or yellow colour, which have been discovered during the chemical investigations of this root. That several of these substances are merely mixtures, and some of them in the main identical, has been satisfactorily proved by late investigators. But there still remain a number, which, though extremely similar, have properties sufficiently marked to entitle them to be considered as distinct. In my papers on the colouring matters of madder, I have described four substances derived from madder, only one of which is a true colouring matter, but all of them capable, under certain circumstances, as for instance in combination with alkalies, of developing red or purple colours of various intensity. To seek for a common origin for these various bodies so similar to one another and yet distinct, is very natural, and the discovery of it no improbable achievement.

scholarly journals Evaluation and Predictive Modeling of Removal Condition for Bioadsorption of Indigo Blue Dye by Spirulina platensis

2020 ◽  
Vol 8 (1) ◽  
pp. 82 ◽  
Author(s):  
Robledo-Padilla ◽  
Aquines ◽  
Silva-Núñez ◽  
Alemán-Nava ◽  
Castillo-Zacarías ◽  
...  
Keyword(s):  
Spirulina Platensis ◽  
Biomass Concentration ◽  
Blue Dye ◽  
Removal Capacity ◽  
Treatment Conditions ◽  
Linear Behavior ◽  
Indigo Blue ◽  
Experimental Values ◽  
Physical Treatments ◽  
Similar Accuracy

Among the different chemical and physical treatments used to remove the color of the textile effluents, bioremediation offers many benefits to the environment. In this study, we determined the potential of Spirulina platensis (S. platensis) for decolorizing indigo blue dye under different incubation conditions. The microalgae were incubated at different pH (from 4 to 10) to calibrate for the optimal discoloration condition; a pH of 4 was found to be optimal. The biomass concentration in all experiments was 1 g/L, which was able to decolorize the indigo blue dye by day 3. These results showed that S. platensis is capable of removing indigo blue dye at low biomass. However, this was dependent on the treatment conditions, where temperature played the most crucial role. Two theoretical adsorption models, namely (1) a first-order model equation and (2) a second-order rate equation, were compared with observed adsorption vs. time curves for different initial concentrations (from 25 to 100 mg/L). The comparison between models showed similar accuracy and agreement with the experimental values. The observed adsorption isotherms for three temperatures (30, 40, and 50 °C) were plotted, showing fairly linear behavior in the measured range. The adsorption equilibrium isotherms were estimated, providing an initial description of the dye removal capacity of S. platensis.

Coagulation of indigo blue present in dyeing wastewater using a residual bittern

2013 ◽  
Vol 104 ◽  
pp. 246-249 ◽  
Author(s):  
L.F. Albuquerque ◽  
A.A. Salgueiro ◽  
J.L. de S. Melo ◽  
O. Chiavone-Filho
Keyword(s):  
Dyeing Wastewater ◽  
Indigo Blue

Removal of Indigo Blue in Aqueous Solution Using Fe/Cu Nanoparticles and C/Fe–Cu Nanoalloy Composites

2009 ◽  
Vol 207 (1-4) ◽  
pp. 307-317 ◽  
Author(s):  
Jésica Trujillo-Reyes ◽  
Víctor Sánchez-Mendieta ◽  
Arturo Colín-Cruz ◽  
Raúl A. Morales-Luckie
Keyword(s):  
Aqueous Solution ◽  
Cu Nanoparticles ◽  
Indigo Blue
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