Evaluation of Methylene Blue Sorption onto Low-Cost Biosorbents: Equilibrium, Kinetics, and Thermodynamics

This paper presents a study on batch sorption of methylene blue dye from aqueous solution onto Ginkgo biloba sorbent, a waste material produced during the Fall season in many parts of the world. Batch kinetics, equilibrium, and thermodynamic studies were conducted to evaluate the effect of contact time (0–150 min), sorbent dose (0.5–3.0 g/L), pH (2–11), temperature (30–50°C), initial MB concentration (10–30 mg/L), and particle size (177 μm—590 μm) on the methylene blue dye sorption. More than 99% removal of methylene blue was observed within 120 minutes. A Lagergren pseudo-first-order model, a pseudo-second-order model, and intraparticle diffusion models fitted well to the kinetics experimental data. Langmuir and Freundlich isotherm models also fitted well with the observed equilibrium data. Additionally, removal of methylene blue increased with increase in solution pH. Higher sorption capacity (∼20 mg/g) was observed with smaller particle size (170 μm) as compared to larger particle sizes (590 μm). Thermodynamic parameters such as ∆G°, ∆H°, and ∆S° indicated that the sorption process was feasible, spontaneous, and endothermic in nature. The study shows that Ginkgo biloba leaves have the potential to be an efficient sorbent for the removal of methylene blue from surface water samples.

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Removal of Methylene Blue Dye from Wastewater Using Periodiated Modified Nanocellulose

International Journal of Chemical Engineering ◽

10.1155/2021/9965452 ◽

2021 ◽

Vol 2021 ◽

pp. 1-16

Author(s):

Hizkeal Tsade Kara ◽

Sisay Tadesse Anshebo ◽

Fedlu Kedir Sabir ◽

Getachew Adam Workineh

Keyword(s):

Methylene Blue ◽

Adsorption Process ◽

Dye Adsorption ◽

Freundlich Isotherm ◽

Color Removal ◽

Isotherm Models ◽

Blue Dye ◽

Solution Ph ◽

X Ray ◽

Pseudo Second Order

The study was focused on the preparation and characterizations of sodium periodate-modified nanocellulose (NaIO4-NC) prepared from Eichhornia crassipes for the removal of cationic methylene blue (MB) dye from wastewater (WW). A chemical method was used for the preparation of NaIO4-NC. The prepared NaIO4-NC adsorbent was characterized by using X-ray diffraction (XRD), Fourier transform infrared (FTIR), scanning electron microscope (SEM), energy-dispersive X-ray (EDX), and Brunauer–Emmett–Teller (BET) instruments. Next, it was tested to the adsorption of MB dye from WW using batch experiments. The adsorption process was performed using Langmuir and Freundlich isotherm models with maximum adsorption efficiency (qmax) of 90.91 mg·g−1 and percent color removal of 78.1% at optimum 30 mg·L−1, 60 min., 1 g, and 8 values of initial concentration, contact time, adsorbent dose, and solution pH, respectively. Pseudo-second-order (PSO) kinetic model was well fitted for the adsorption of MB dye through the chemisorption process. The adsorption process was spontaneous and feasible from the thermodynamic study because the Gibbs free energy value was negative. After adsorption, the decreased values for physicochemical parameters of WW were observed in addition to the color removal. From the regeneration study, it is possible to conclude that NaIO4-NC adsorbent was recyclable and reused as MB dye adsorption for 13 successive cycles without significant efficient loss.

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Biosorption of Methylene Blue Dye from Aqueous Solutions

International Journal of Engineering and Advanced Technology - Regular Issue ◽

10.35940/ijeat.a1138.1291s419 ◽

2019 ◽

Vol 9 (1S4) ◽

pp. 1110-1115

Keyword(s):

Methylene Blue ◽

Plant Biomass ◽

Low Cost ◽

Batch Process ◽

Isotherm Models ◽

Blue Dye ◽

Cow Dung ◽

Synthetic Dyes ◽

Methylene Blue Dye ◽

Groundnut Shell

Synthetic dyes, like methylene blue, in effluents of chemical industries, are reported to be toxic with alleged carcinogenic and genotoxic consequences. Biosorption is considered as a low-cost alternative to the costly removal processes. Agricultural wastes and plant biomass and are contemplated to be low-cost candidates because they can be used without or with a minimum of processing. This work was intended to test the possibility and comparative study of different low-cost natural adsorbents [Coconut husk (H), Groundnut shell (G), Cow Dung (C) and moss (M)] for the sequestration of methylene blue dye from aqueous solution. A batch process was done to study the effects of different parameters such as contact time, pH, adsorbent dosage and initial dye concentration. Adsorption equilibrium data were represented using Langmuir, Freundlich and Temkin isotherm models. 75 % of dye removal was observed with moss, hence proves to be an effective, low-cost adsorbent.

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Lotus seedpod as a low-cost biomass for potential methylene blue adsorption

Water Science & Technology ◽

10.2166/wst.2016.423 ◽

2016 ◽

Vol 74 (11) ◽

pp. 2560-2568 ◽

Cited By ~ 2

Author(s):

Qiulai He ◽

Hongyu Wang ◽

Jing Zhang ◽

Zhuocheng Zou ◽

Jun Zhou ◽

...

Keyword(s):

Aqueous Solution ◽

Methylene Blue ◽

Low Cost ◽

Freundlich Isotherm ◽

Isotherm Models ◽

Solution Ph ◽

Monolayer Adsorption ◽

Pseudo Second Order ◽

Central Composite ◽

Lotus Seedpod

The adsorption of methylene blue (MB) by low cost biomass lotus seedpod (LSP) was optimized by a central composite design combined with response surface methodology in aqueous solution. Solution pH, initial dye concentration and adsorbent dosage were studied as independent variables at five levels each, respectively. Analysis of variance suggested the validity of the regression model. LSP was characterized by Fourier transform infrared spectra and energy dispersive spectroscopy. The kinetics revealed that the adsorption behavior followed the pseudo-second-order model. Langmuir and Freundlich isotherm models were used to evaluate the adsorption, and the experimental data were better fitted by the Langmuir isotherm than the Freundlich isotherm. The maximum monolayer adsorption capacity of the LSP was 157.98 mg g−1 at 30 °C for MB adsorption. In addition, 0.2 M HCl solution could be used for reusability of LSP via desorption tests. LSP was proven to be an available and effective biosorbent for MB removal from aqueous solution.

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The Removal of Methylene Blue Dye from Aqueous Solutions Using Activated and Non-Activated Bentonites

Adsorption Science & Technology ◽

10.1260/026361703769645780 ◽

2003 ◽

Vol 21 (5) ◽

pp. 451-462 ◽

Cited By ~ 22

Author(s):

Sameer Al-Asheh ◽

Fawzi Banat ◽

Leena Abu-Aitah

Keyword(s):

Methylene Blue ◽

Ph Value ◽

Sodium Dodecyl ◽

Freundlich Isotherm ◽

Blue Dye ◽

Batch Adsorption ◽

Ionic Surfactant ◽

Methylene Blue Dye ◽

X Ray Diffraction ◽

Initial Ph

An improvement in the adsorption capacity of naturally available bentonite towards water pollutants such as Methylene Blue dye (MBD) is certainly needed. For this purpose, sodium bentonite was activated by two methods: (1) treatment with sodium dodecyl sulphate (SDS) as an ionic surfactant and (2) thermal treatment in an oven operated at 850°C. Batch adsorption tests were carried out on removing MBD from aqueous solution using the above-mentioned bentonites. It was found that the effectiveness of bentonites towards MBD removal was in the following order: thermal-bentonite > SDS-bentonite > natural bentonite. X-Ray diffraction analysis showed that an increase in the microscopic bentonite platelets on treatment with SDS was the reason behind the higher uptake of MBD. An increase in sorbent concentration or initial pH value of the solutions resulted in a greater removal of MBD from the solution. An increase in temperature led to an increase in MBD uptake by the bentonites studied in this work. The Freundlich isotherm model was employed and found to represent the experimental data well.

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Removal of Methylene Blue Dye by Using Eggshell Powder

Jurnal Teknologi ◽

10.11113/jt.v65.1648 ◽

2013 ◽

Vol 65 (1) ◽

Author(s):

Norzita Ngadi ◽

Chin Chiek Ee ◽

Nor Aida Yusoff

Keyword(s):

Methylene Blue ◽

Textile Industry ◽

Low Cost ◽

Kinetic Studies ◽

Operating Conditions ◽

Blue Dye ◽

Dye Wastewater ◽

Order Model ◽

Aquatic Life ◽

Pseudo Second Order

Dyes contain carcinogenic materials which can cause serious hazards to aquatic life and the users of water. Textile industry is the main source of dye wastewater which results in environmental pollution. Many studies have been conducted to investigate the use of low cost adsorbent as an alternative technique for the adsorption of dye. The objective of this study is to determine the potential of eggshell powder as an adsorbent for methylene blue removal and find out the best operating conditions for the color adsorption at laboratory scale. The adsorption of cationic methylene blue from aqueous solution onto the eggshell powder was carried out by varying the operating parameters which were contact time, pH, dosage of eggshell powder and temperature in order to study their effect in adsorption capacity of eggshell powder. The results obtained showed that the best operating condition for removal of methylene blue was at pH 10 (78.98 %) and temperature 50°C (47.37 %) by using 2 g of eggshell powder (57.03 %) with 30 minutes equilibrium time (41.36 %). The kinetic studies indicated that pseudo-second-order model best described the adsorption process.

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Adsorption of Cr(VI), Pb(II) Ions and Methylene Blue Dye from Aqueous Solution using Pristine and Modified Coral Limestone

Asian Journal of Chemistry ◽

10.14233/ajchem.2020.22815 ◽

2020 ◽

Vol 32 (10) ◽

pp. 2624-2632

Author(s):

C.S. Nkutha ◽

N.D. Shooto ◽

E.B. Naidoo

Keyword(s):

Aqueous Solution ◽

Methylene Blue ◽

Freundlich Isotherm ◽

Blue Dye ◽

Methylene Blue Dye ◽

Sorption Behaviour ◽

Freundlich Model ◽

Experimental Parameters ◽

Acid And Base ◽

Modified Adsorbents

This work reports the feasibility of using pristine and chemically modified coral limestones by acid and base. Their potential adsorptive capabilities is probed by treatment of toxic Cr(VI), Pb(II) ions and methylene blue in aqueous solution under different experimental parameters by batch method. Parameters such as agitation time, concentration, temperature and pH were varied to understand the sorption behaviour of the adsorbents in each case. The adsorbents were characterized by SEM, XRD and FTIR. Morphological analysis by SEM micrographs show that the surface of all adsorbents was irregular in nature. XRD spectra confirmed the orthorhombic structure of aragonite in the pristine coral limestones (PCL), acid modified coral limestones (ACL) and base modified coral limestones (BCL). FTIR results affirmed the presence of (CO3 2-) and (-C=O) groups of the carbonate ions and Ca-O attachment to the surface of PCL and removal of CaCO3 characteristic peaks in ACL and BCL. However, in the modified adsorbents shifting of Ca-O peaks occurred. The recorded maximum adsorption capacities of PCL, ACL and BCL for Cr(VI) ions were 69.42, 65.04, 64.88 mg/g, Pb(II) ions 39.36, 74.11, 78.34 mg/g and methylene blue 37.24, 46.28, 46.39 mg/g, respectively. The uptake of Pb(II), Cr(VI) ions, methylene blue onto PCL fitted Freundlich model. Also the uptake of Cr(VI) ions and methylene blue onto ACL and BCL fitted Freundlich isotherm. However, uptake of Pb(II) ions onto both ACL and BCL fitted Langmuir isotherm. The data revealed that the adsorption of Pb(II) ions onto PCL and ACL and methylene blue dye onto PCL was exothermic. Whilst the adsorption of Cr(VI) ions onto PCL, ACL and BCL and methylene blue dye onto ACL and BCL were endothermic in nature, hence increasing the temperature would enhance the uptake of Pb(II) ions onto BCL, Cr(VI) ions onto ACL and BCL and methylene blue onto ACL and BCL. The obtained (ΔGº) values at all studied temperatures for the adsorption of Pb(II), Cr(VI) ions and methylene blue onto PLC, ACL and BCL indicated a spontaneous process.

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