A Recent Study on Remediation of Direct Blue 15 Dye Using Halloysite Nanotubes

Ukkund, Shareefraza J.; Puthiyillam, Prasad; Anqi, Ali E.; Taqui, Syed Noeman; Ali, Masood Ashraf; Syed, Usman Taqui; Alghamdi, Mohammed N.; Siddiqui, Irfanul Haque; Alshehri, Hashim M.; Safaei, Mohammad Reza; Mir, Rayees Afzal; Elfasakhany, Ashraf; Eed, Emad M.; Goodarzi, Marjan; Soudagar, Manzoore Elahi M.

doi:10.3390/app11178196

“…Our research school has demonstrated pioneering efforts to use NIS as filler material for the fabrication of composites [49][50][51][52] and as an adsorbent for the bioremediation of toxic dyes [53][54][55][56][57][58][59][60][61][62][63][64]. Recently, our research school has demonstrated circular economy at the laboratory scale using NIS [65].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Crystal Violet Dye from Aqueous Solution using Industrial Pepper Seed Spent: Equilibrium, Thermodynamic, and Kinetic Studies

Sulthana

¹

,

Taqui

²

,

Syed

³

et al. 2022

Adsorption Science & Technology

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The economic viability of adsorbing crystal violet (CV) using pepper seed spent (PSS) as a biosorbent in an aqueous solution has been studied. A parametrical investigation was conducted considering parameters like initial concentration of dye, time of contact, pH value, and temperature variation. The analysis of experimental data obtained was carried out by evaluating with the isotherms of Freundlich, Sips, Tempkin, Jovanovic, Brouers–Sotolongo, Toth, Vieth–Sladek, Radke–Prausnitz, Langmuir, and Redlich–Peterson. The adsorption kinetics were studied by implementing the Dumwald-Wagner, Weber-Morris, pseudo-first-order, pseudo-second-order, film diffusion, and Avrami models. The experimental value of adsorption capacity ( Q m = 129.4 mg g − 1 ) was observed to be quite close to the Jovanovic isotherm adsorption capacity ( Q m = 82.24 mg g − 1 ) at ( R 2 ), coefficient of correlation of 0.945. The data validation was found to conform to that of pseudo-second-order and Avrami kinetic models. The adsorption process was specified as a spontaneous and endothermic process owing to the thermodynamic parametrical values of Δ G 0 , Δ H 0 , and Δ S 0 . The value of Δ H 0 is an indicator of the process’s physical nature. The adsorption of CV to the PSS was authenticated from infrared spectroscopy and scanning electron microscopy images. The interactions of the CV-PSS system have been discussed, and the observations noted suggest PSS as a feasible adsorbent to extract CV from an aqueous solution.

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“…The major barriers to the SME shift from a linear economy to CE include the following reasons: administrative burden, company’s environmental culture, innovation policies, technological know-how and privation of capital, effective legislation, government inadequate financial support and lack of information and technical back-up [ 53 ]. All these barriers are of no concern if the raw material is replaced with dye-adsorbed NIS or nanomaterials [ 54 , 55 , 56 ], which requires only optimising process parameters before production using the same machinery and know-how.…”

Section: Resultsmentioning

confidence: 99%

Bioremediation of Textile Industrial Effluents Using Nutraceutical Industrial Spent: Laboratory-Scale Demonstration of Circular Economy

Taqui

¹

,

Syed

²

,

Syed

³

et al. 2022

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This research reports the first-ever study on abundantly available, environmentally friendly, low-cost and ready-for-use Nutraceutical Industrial Cumin Seed Spent (NICUS) as an innovative adsorbent for bioremediation of a bisazo Acid Red 119 (AR119) dye, a probable mutagen from textile industrial effluents (TIEs). The experiment at the laboratory scale is designed to suit the concepts of sustainability and valorisation under the domain of circular economy. The experimental qe value obtained was 96.00 mg g−1. The optimised conditions of parameters are as follows: pH of 2; adsorption time, 210 min; adsorbent dosage, 0.300 g L−1; particle size, 175 µM; initial dye concentration, 950 mg L−1; orbital shaking, 165 rpm and temperature, 50 °C, producing an impressive value of 748 mg of dye adsorbing on 1 g of dry NICUS. The adsorption capacity of NICUS obtained from the quadratic model developed for process optimisation gave values of 748 mg g−1. As a prelude to commercialisation, five variables that affect the adsorption process were experimentally studied. For the feasibility and efficiency of the process, a two-level fractional factorial experimental design (FFED) was applied to identify variables that influence the adsorption capacity of NICUS. The identified variables were applied to scale experiments by three orders. Nine isotherm models were used to analyse the adsorption equilibrium data. The Vieth–Sladek adsorption isotherm model was found to be the best fit. The pseudo-second-order reaction was the appropriate mechanism for the overall rate of the adsorption process. Mechanistic studies related to mass transfer phenomena were more likely to be dominant over the diffusion process. Techniques such as SEM, FTIR and CHN analysis were used to characterise NICUS. The dye-adsorbed NICUS obtained as “sludge” was used as a reinforcing material for the fabrication of composites using plastic waste. The physicomechanical and chemical properties of thermoplastic and thermoset composite using dye-adsorbed NICUS were evaluated and compared with NICUS composites. Prospects of integrating Small and Medium Enterprises (SMEs) into the circular economy of Nutraceutical Industrial Spent (NIS) are discussed.

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“…It was noticed (Figure 4), that the percent of MV adsorption grew significantly from 91-99.9%, with the increase of adsorbent dosage from 0.025 to 0.2 g. Thereafter, by increasing the adsorbent dosage up to 0.4 g, an insignificant increase in the removal efficiency was observed [63].…”

Section: Effect Of Adsorbent Dosagementioning

confidence: 91%

“…It was noticed (Figure 4), that the percent of MV adsorption grew significantly from 91-99.9%, with the increase of adsorbent dosage from 0.025 to 0.2 g. Thereafter, by increasing the adsorbent dosage up to 0.4 g, an insignificant increase in the removal efficiency was observed [63]. It was also found that the enhancement of adsorbent dosage, resulted in a decrease in the amount of adsorbed dye per unit mass of adsorbent, from 91.3 to 6.3 mg/g.…”

Section: Effect Of Adsorbent Dosagementioning

confidence: 92%

Removal of Methyl Violet from Aqueous Solution by Adsorption onto Halloysite Nanoclay: Experiment and Theory

Sadiku

¹

,

Berisha

²

,

Maloku

³

et al. 2022

Toxics

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Methyl Violet (MV) was removed from aqueous solutions by adsorption onto halloysite nanoclay (HNC) employing equilibrium, kinetics, thermodynamic data, molecular modellingR (MD), and Monte Carlo (MC) simulations. The chosen experimental variables were pH, temperature, starting MV concentration, contact time, and adsorbent dosage. The adsorption rate was determined to increase with increasing contact time, initial dye concentration, pH, and temperature. The Langmuir, Freundlich, Temkin, and Dubinin–Radushkevich (D-R) isotherms were utilized to determine the adsorption capacity of HNC. The Langmuir equation matched equilibrium data better than the other models, whereas the pseudo-second-order model better described kinetic data, and thermodynamic analyses revealed that the adsorption process was spontaneous, endothermic, and physisorption-based. This study focused on two distinct molecular mechanics-based theoretical approaches (MC and MD). These techniques enabled a molecular comprehension of the interaction between the MV molecule and the halloysite surface. Theoretical results were consistent with experimental findings. The outcomes revealed that HNC is an excellent dye adsorbent for industrial effluents.

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A Recent Study on Remediation of Direct Blue 15 Dye Using Halloysite Nanotubes

Cited by 7 publications

References 60 publications

Adsorption of Crystal Violet Dye from Aqueous Solution using Industrial Pepper Seed Spent: Equilibrium, Thermodynamic, and Kinetic Studies

Adsorption of Crystal Violet Dye from Aqueous Solution using Industrial Pepper Seed Spent: Equilibrium, Thermodynamic, and Kinetic Studies

Bioremediation of Textile Industrial Effluents Using Nutraceutical Industrial Spent: Laboratory-Scale Demonstration of Circular Economy

Removal of Methyl Violet from Aqueous Solution by Adsorption onto Halloysite Nanoclay: Experiment and Theory

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