Adsorption of methylene blue dye from aqueous solution by novel biomass<i>Eucalyptus sheathiana</i>bark: equilibrium, kinetics, thermodynamics and mechanism

Afroze, Sharmeen; Sen, Tushar Kanti; Ang, Ming; Nishioka, Hiroshi

doi:10.1080/19443994.2015.1004115

Cited by 103 publications

(49 citation statements)

References 63 publications

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“…The same trend has also been observed by other researchers [26,34]. However, the percentage of removal obtained from column study was lower than that obtained from batch study for the same initial dye concentration [22], which may be due to insufficient contact time. Similar trends were obtained for adsorption of MB onto pine cone [23] and onto cedar sawdust and crushed brick [55].…”

Section: Effect Of Adsorbate Inlet Concentrationsupporting

confidence: 86%

“…The BET surface area of the biomass sample was 6.55 m 2 /g, bulk density was 0.39 gm/cm 3 and average pore size was 18.42 Å . These specifications of raw eucalyptus bark adsorbent used in the present study are as per our earlier published article [22].…”

Section: Characterisation Of Adsorbentmentioning

confidence: 99%

“…Eucalyptus bark is a carbonaceous material that contains cellulose, hemicelluloses, tanning and lignin and some functional groups such as carboxyl and hydroxyl groups, etc., making this bark material an effective adsorbent [21]. In our previous batch adsorption studies, it was found that eucalyptus bark material was efficient, cost effective and a better alternative adsorbent to expensive activated carbon in the removal of MB dye from aqueous solution [22]. However, batch mode operation is usually limited to the treatment of small quantities of wastewater and to the identification of various process parameters and their effects on the adsorption process.…”

Section: Introductionmentioning

confidence: 98%

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Adsorption performance of continuous fixed bed column for the removal of methylene blue (MB) dye using Eucalyptus sheathiana bark biomass

2015

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In this study, the adsorptive effectiveness of sustainable and cost-effective eucalyptus bark biomass in the removal of methylene blue (MB) dye from its aqueous solution has been tested using a packed bed up-flow column experiment. A series of column experiments using raw eucalyptus bark was performed to determine the breakthrough curves with varying inlet MB dye flow rate (10-15 mL min -1 ), initial MB dye concentration (50-100 mg L -1 ) and adsorbent bed height (10-15 cm). High bed height, low flow rate and high initial dye concentration were found to be the better conditions for maximum dye adsorption. To predict the breakthrough curves and to determine the characteristic parameters of the column dynamics for industrial applications and for process design, Thomas model, Yoon-Nelson model and bed depth service time model were applied to experimental breakthrough data. All models were found suitable for describing the dynamic behaviour of the column, with respect to MB flow rate, initial dye concentration and adsorbent bed height. The findings revealed that eucalyptus bark biomass has a high adsorption potential for the removal of MB dye from aqueous solutions in a column system, and that it could be used to treat dye-containing effluents. List of symbols ACross sectional area of bed in column (cm 2 ) A 1 Used bed area (cm 2 ) A 2 Unused bed area (cm 2 )pollutant concentration (mg/L) C o Inlet pollutant concentration (mg/L) H Height of bed in column (cm) H B Used bed length up to break point (cm) H T Bed height of column (cm) H UNB Unused bed length (cm) K o Rate constant in BDST model (L/mg min) K T Thomas rate constant (mL/mg min) K YN Yoon and Nelson rate constant (min -1 ) MTZ Mass transfer zone (cm) m Amount of adsorbent in the column (g) m p Mass of pine cone (g) m total Total amount of methylene blue dye sent to column (g) N o Adsorption capacity (mg/L) Q Volumetric flow rate (mL/min) q total Total adsorbed methylene blue dye quantity (g) q o Equilibrium adsorbate uptake (mg/g) t Breakthrough (sampling) time (min) t t Total time (min) t total Total flow time (min) t b Usable capacity of bed up to the breakthrough point time (min) t u Time equivalent to usable capacity (min) U Influent linear velocity (cm/min) V Effluent volume (ml) V eff Total effluent volume (mL) s Time required for 50 % adsorbate breakthrough (min)

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Section: Effect Of Adsorbate Inlet Concentrationsupporting

confidence: 86%

Section: Characterisation Of Adsorbentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

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Adsorption performance of continuous fixed bed column for the removal of methylene blue (MB) dye using Eucalyptus sheathiana bark biomass

2015

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“…Today, more than 100,000 commercial dyes are known with a total yearly production of 7 × 10 5 tonnes per year [2]. The high solubility of dyes in water effluents possesses serious risks to crop, aquatic life and human health [3]. Different separation techniques such as precipitation, ion-exchange, adsorption, coagulation/flocculation, advanced oxidation, ozonation, membrane separation and liquid-liquid extraction have been used to remove dyes from wastewater [4].…”

Section: Introductionmentioning

confidence: 99%

Adsorption removal of Methylene Blue (MB) dye from aqueous solution by bio-char prepared from Eucalyptus sheathiana bark: kinetic, equilibrium, mechanism, thermodynamic and process design

Dawood

Sen

Phan

2016

Desalination and Water Treatment

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A B S T R A C TEucalyptus bark (EB) materials-based bio-char adsorbent was synthesised and characterised using SEM-EDS, BET and CHN analyser. The adsorbent surface functional groups were determined by FT-IR analyser. Various textural characteristics such as BET surface area, pore size, bulk density, point of zero charge were also determined. The adsorption potential of these bio-char for the removal of cationic dye Methylene Blue (MB) from aqueous solution was studied. The effects of various temperature profiles on the production of EB biochar were studied and the most efficient temperature profile was identified at 500˚C. Batch adsorption kinetic study showed that the amount of dye adsorbed q t (mg/g) depends on various physicochemical process parameters such as initial solution pH, dye concentration, temperature, adsorbent dose, salt concentration and presence of SDS surfactant. It was found that the extent of MB dye adsorption by EB bio-char increased with the increase of initial dye concentration, contact time, temperature, SDS surfactant concentration and solution pH, but decreased with the increase of adsorbent dose and salt concentration. The optimum adsorption conditions were found at the initial dye concentration of 100 mg/L, initial solution pH of 11.3, adsorbent dose of 10 mg and solution temperature of 55˚C. Furthermore, pseudo-first-order, pseudo-second-order and intra-particle diffusion models were fitted to examine the adsorption kinetics and mechanism of adsorption. Equilibrium data were best represented by Langmuir isotherm model and gives a monolayer effective adsorption capacity of bio-char which is comparative to other adsorbents including commercial activated carbon. Thermodynamic parameters suggested that the adsorption was an endothermic, spontaneous and physical in nature. Furthermore, a single-stage batch adsorber design for the MB dye onto EB bio-char particles were presented based on the Langmuir isotherm model equation. These results indicated EB biomass as good and cheap precursor for the production of an effective and environmental friendly bio-char adsorbent.

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“…8 In addition, MG is largely being utilized as a food colouring agent, food additive, and a therapeutic disinfectant and anthelminthic as well as a dye in a vast majority of industries, 11 On the other hand, MB is generally being utilized as a colouring agent in the biomedical field such as in microbiology, surgery, and diagnostics. 12 Beside their greater use, they have now turned into an exceedingly questionable compounds because of the risks it (MG) postures to the consumers of treated fish including its effects on the immune and reproductive system, 13,14 similarly, intense exposure to MB can bring about numerous health risks such as fast pulse, skin disease, jaundice, and tetraplegia and tissue necrosis. 6 In response to concerns regarding the health risks associated with the utilization of dyes, adsorption is prob-Ullah et al: Adsorption Kinetics of Malachite Green ... ably the most adaptable and versatile approach for the expulsion of dyes from aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

Adsorption Kinetics of Malachite Green and Methylene Blue from Aqueous Solutions Using Surfactant-modified Organoclays

Ullah

Nafees²,

Iqbal

et al. 2017

ACSi

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The main objective of this research is to study the adsorption behaviour of malachite green and methylene blue dyes onto the surfactant modified natural clays. The results of SEM, XRD, IR, and thermal analysis confirms the intercalation of organic moiety in to the clay. The adsorption results show that pseudo-first order kinetics best fitted for both the dyes adsorbed on organo-clay. The data also reveals that both dyes are in a good agreement with Langmuir isotherm in both types of modified clays. The value of separation factor, R L , from Langmuir equation and Freundlich constant, n, give an indication of favourable adsorption. The maximum adsorption capacity q m based on Langmuir model was found to be 294-303 mg/g at 25 °C, is in good agreement with the experimental values.

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Adsorption of methylene blue dye from aqueous solution by novel biomassEucalyptus sheathianabark: equilibrium, kinetics, thermodynamics and mechanism

Cited by 103 publications

References 63 publications

Adsorption performance of continuous fixed bed column for the removal of methylene blue (MB) dye using Eucalyptus sheathiana bark biomass

Adsorption performance of continuous fixed bed column for the removal of methylene blue (MB) dye using Eucalyptus sheathiana bark biomass

Adsorption removal of Methylene Blue (MB) dye from aqueous solution by bio-char prepared from Eucalyptus sheathiana bark: kinetic, equilibrium, mechanism, thermodynamic and process design

Adsorption Kinetics of Malachite Green and Methylene Blue from Aqueous Solutions Using Surfactant-modified Organoclays

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