Mg-Cr Layered Double Hydroxide Intercalated Oxalic Anion to Remove Cationic Dye Solutions: Rhodamine B and Methylene Blue

A MgCr-based layered double hydroxide (LDH) was synthesized by a coprecipitation method, followed by an intercalation process using an oxalic anion. The materials were characterized using X-ray diffraction analysis, FT-IR spectroscopy, and pH pzc measurement. The materials were then applied as adsorbents for removal of methylene blue (MB) and rhodamine B (RhB) from aqueous solution. Pristine Mg/Cr LDH exhibited RhB adsorption capacity of 32.154 mg g⁻1, whereas the use of intercalated Mg/Cr LDH caused an increase in the capacity (139.526 mg g⁻1). Kinetic studies indicated that the dye adsorption using both LDHs followed a pseudo-second-order kinetic model; the K2 values of pristine and modified Mg/Cr LDH for RhB and MB were 6.970, 0.001, 0.426, and 2.056 g mg⁻1 min⁻1, respectively. The thermodynamic study identified that the adsorption of both dyes onto the LDHs was a spontaneous process and can be classified as physical adsorption with adsorption energies of <40 kJ/mol. Moreover, the desorption and regeneration experiments indicated the high economic feasibility and reusability of the LDHs. By using HCl as the optimal solvent, the LDHs could desorb as much as 98% of the dye and could be used as adsorbents with high adsorption capacity over three cycles.

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Parametric and adsorption kinetic studies of methylene blue removal from simulated textile water using durian (Durio zibethinus murray) skin

Water Science & Technology ◽

10.2166/wst.2015.247 ◽

2015 ◽

Vol 72 (6) ◽

pp. 896-907 ◽

Cited By ~ 18

Author(s):

S. M. Anisuzzaman ◽

Collin G. Joseph ◽

D. Krishnaiah ◽

A. Bono ◽

L. C. Ooi

Keyword(s):

Methylene Blue ◽

Adsorption Capacity ◽

Dye Adsorption ◽

Freundlich Isotherm ◽

Kinetic Studies ◽

Isotherm Models ◽

Batch Adsorption ◽

Maximum Adsorption Capacity ◽

Order Kinetic ◽

Durio Zibethinus

In this study, durian (Durio zibethinus Murray) skin was examined for its ability to remove methylene blue (MB) dye from simulated textile wastewater. Adsorption equilibrium and kinetics of MB removal from aqueous solutions at different parametric conditions such as different initial concentrations (2–10 mg/L), biosorbent dosages (0.3–0.7 g) and pH solution (4–9) onto durian skin were studied using batch adsorption. The amount of MB adsorbed increased from 3.45 to 17.31 mg/g with the increase in initial concentration of MB dye; whereas biosorbent dosage increased from 1.08 to 2.47 mg/g. Maximum dye adsorption capacity of the durian skin was found to increase from 3.78 to 6.40 mg/g, with increasing solution pH. Equilibrium isotherm data were analyzed according to Langmuir and Freundlich isotherm models. The sorption equilibrium was best described by the Freundlich isotherm model with maximum adsorption capacity of 7.23 mg/g and this was due to the heterogeneous nature of the durian skin surface. Kinetic studies indicated that the sorption of MB dye tended to follow the pseudo second-order kinetic model with promising correlation of 0.9836 < R2 < 0.9918.

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High Reusability of NiAl LDH/Biochar Composite in the Removal Methylene Blue from Aqueous Solution

Indonesian Journal of Chemistry ◽

10.22146/ijc.56955 ◽

2021 ◽

Vol 21 (2) ◽

pp. 421

Author(s):

Aldes Lesbani ◽

Neza Rahayu Palapa ◽

Rabelia Juladika Sayeri ◽

Tarmizi Taher ◽

Nurlisa Hidayati

Keyword(s):

Aqueous Solution ◽

Methylene Blue ◽

Layered Double Hydroxide ◽

Physical Adsorption ◽

Nitrogen Adsorption ◽

Order Kinetic ◽

Adsorption Model ◽

Composite Formation ◽

Adsorption Processes ◽

Double Hydroxide

Ni/Al layered double hydroxide was used as a starting material for composite formation with biochar as a matrix. The materials were characterized using X-ray, FTIR, nitrogen adsorption-desorption, thermal, and morphology analyses. The NiAl LDH/Biochar material is then used as an adsorbent of methylene blue from an aqueous solution. The factor that was influencing adsorption such as pH, time, methylene blue concentration, and temperature adsorption was studied systematically. The regeneration of adsorbent was performed to know the stability of NiAl LDH/Biochar under several cycle adsorption processes. The results showed that NiAl LDH/Biochar has a specific diffraction peak at 11.63° and 22.30°. NiAl LDH/Biochar has more than ten-fold surface area properties (438,942 m2/g) than biochar (50.936 m2/g), and Ni/Al layered double hydroxide (92.682 m2/g). The methylene blue adsorption on NiAl LDH/Biochar follows a pseudo-second-order kinetic adsorption model and classify as physical adsorption. The high reusability properties were found for NiAl LDH/Biochar, which was largely different from biochar and Ni/Al layered double hydroxide.

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Study on the adsorption of methylene blue from aqueous solution using hydrogel glucomannan/graphene oxide

Vietnam Journal of Catalysis and Adsorption ◽

10.51316/jca.2021.010 ◽

2021 ◽

Vol 10 (1) ◽

pp. 59-66

Author(s):

Son Le Lam ◽

Phu Nguyen Vinh ◽

Hieu Le Trung ◽

Tan Le Thua ◽

Nhan Dang Thi Thanh ◽

...

Keyword(s):

Aqueous Solution ◽

Methylene Blue ◽

Graphene Oxide ◽

Adsorption Capacity ◽

Organic Dyes ◽

Dye Adsorption ◽

Order Kinetic ◽

Equilibrium Data ◽

Order Kinetic Model ◽

Pseudo Second Order

Glucomannan/graphene oxide (GM/GO) hydrogel was synthesized by using calcium hydroxide as the crosslinker. The synthesized material was characterized by using IR, XRD, SEM, EDX and RAMAN technology. The composite hydrogel was used for removal of organic dyes from aqueous solution. The results showed that the GM/GO hydrogel had a porous structure and a high adsorption capacity toward methylene blue (MB). The pseudo-second-order kinetic model could fit the rate equation of MB adsorption onto the GM/GO hydrogel. The adsorption of MB onto GM/GO hydrogel was a spontaneous process. In addition, the equilibrium adsorption isotherm data indicated that equilibrium data were fitted to the Langmuir isotherm and the maximum dye adsorption capacity was 198,69 mg.g-1. Moreover, the hydrogel was stable and easily recovered and adsorption capacity was around 97% of the initial saturation adsorption capacity after being used five times.

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Boron Removal Using Li-Al-OH Layered Double Hydroxide Prepared by One-Step Mechanochemical Approach

10.20944/preprints201811.0477.v1 ◽

2018 ◽

Author(s):

Jingjing Tian ◽

Jun Qu ◽

Lei Wan ◽

Qiwu Zhang ◽

Huimin Gao

Keyword(s):

Adsorption Capacity ◽

Layered Double Hydroxide ◽

Physical Adsorption ◽

Molar Ratio ◽

Mechanochemical Reaction ◽

Boron Uptake ◽

Dry Grinding ◽

One Step ◽

Double Hydroxide ◽

Boron Adsorption

In this study, Li-Al-OH layered double hydroxide (LDH), which was prepared by solvent-free one-step mechanochemical reaction of LiOH and Al(OH)3, was applied to remove boron from aqueous solution. Dry-grinding for 3 h at a rotational speed of 500 rpm, Li/Al molar 1/2 was the optimum condition to prepare highly crystalline of Li-Al LDH phase with no evident impure phases. Two milling products with Li/Al molar ratio at 1/2 and 2/2 were evaluated for boron adsorption. The results confirmed that Li/Al molar ratio 2/2 sample showed high boron adsorption capacity due to the physical adsorption of Li-Al-OH LDH and chemical synergism of phase gel Al(OH)3. The adsorption isotherms, described by the Langmuir model, indicated maximum monolayer boron uptake capacity 45.45 mg/g, implying competitive adsorption capacity of the material in our experiment.

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Adsorption Study of Rhodamine B and Methylene Blue Dyes with ZSM-5 Directly Synthesized from Bangka Kaolin without Organic Template

Indonesian Journal of Chemistry ◽

10.22146/ijc.41369 ◽

2019 ◽

Vol 20 (1) ◽

pp. 130 ◽

Cited By ~ 4

Author(s):

Ani Iryani ◽

Hadi Nur ◽

Mardi Santoso ◽

Djoko Hartanto

Keyword(s):

Methylene Blue ◽

Rhodamine B ◽

Contact Time ◽

Adsorption Process ◽

Dye Adsorption ◽

Standard Entropy ◽

Order Kinetic ◽

Adsorption Model ◽

Isothermal Adsorption ◽

Initial Concentration

Rhodamine B (RB) and Methylene Blue (MB) dyes adsorption using adsorbent ZSM-5 synthesized from Bangka kaolin were investigated in this study. The effects of the initial concentration, contact time and temperature on the adsorption process were also analyzed. The effect of the initial concentration and contact time played an important role in the adsorption process; however, the effect differs significantly in both dyes. The temperature plays little role in the dye adsorption process. The results showed the adsorption process occurred in ZSM-5 adhere to Langmuir isothermal adsorption model showing that the adsorption process occurred to be monolayer. Based on the kinetics studies, the pseudo-first-order kinetic model represents the adsorption kinetics that occurs for both dyes onto the synthesized ZSM-5. Thermodynamic parameters namely Gibbs free energy (ΔG°), standard entropy changes (ΔS°) and standard enthalpy (ΔH°) reveal that the adsorption process onto ZSM-5 for both dyes was spontaneous and exothermic.

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Optimization, Equilibrium and Kinetic Modeling of Methylene Blue Removal from Aqueous Solutions Using Dry Bean Pods Husks Powder

Materials ◽

10.3390/ma14195673 ◽

2021 ◽

Vol 14 (19) ◽

pp. 5673

Author(s):

Giannin Mosoarca ◽

Simona Popa ◽

Cosmin Vancea ◽

Sorina Boran

Keyword(s):

Methylene Blue ◽

Taguchi Method ◽

Aqueous Solutions ◽

Kinetic Modeling ◽

Adsorption Process ◽

Physical Adsorption ◽

Dye Adsorption ◽

Maximum Adsorption Capacity ◽

Order Kinetic ◽

Dry Bean

In this research, dry bean pods husks (DBPH) were used as an adsorbent material after minimum processing (without chemical substances consumption and without thermal treatment) to remove methylene blue from aqueous solutions. The adsorbent surface characteristics were investigated using SEM and FTIR analysis. For maximum removal efficiency, several parameters that influence the dye adsorption were optimized using the Taguchi method. Equilibrium and kinetic modeling, along with thermodynamic studies, were conducted to elucidate the adsorption mechanism. Taguchi experimental design showed that the factor with the highest influence was the adsorbent dose, with a percent contribution established by the ANOVA analysis of 40.89%. Langmuir isotherm and pseudo-second order kinetic model characterizes the adsorption process. The maximum adsorption capacity, 121.16 (mg g−1), is higher than other similar adsorbents presented in scientific literature. Thermodynamic parameters indicate a spontaneous, favorable and endothermic adsorption process, and their values show that physical adsorption is involved in the process. The obtained results, and the fact that adsorbent material is inexpensive and easily available, indicate that DBPH powder represents an effective absorbent for treating waters containing methylene blue. Additionally, the Taguchi method is very suitable to optimize the process.

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Equilibrium, kinetic and thermodynamic studies of the uptake of copper by layered double hydroxide

Hemijska industrija ◽

10.2298/hemind150608005n ◽

2017 ◽

Vol 71 (5) ◽

pp. 429-437 ◽

Cited By ~ 1

Author(s):

Ayawei Nimibofa ◽

Ekubo Tobin ◽

Shooto David ◽

Wankasi Donbebe ◽

Dikio Dixon

Keyword(s):

Layered Double Hydroxide ◽

Metal Ion ◽

Copper Ions ◽

Metal Salt ◽

Physical Adsorption ◽

Second Order ◽

Isotherm Models ◽

Batch Adsorption ◽

Order Kinetic ◽

Double Hydroxide

This study explored the adsorption capacity of Mg/Al layered double hydroxide (LDH) for the removal of Cu2+ from aqueous solutions after synthesis and characterization. The effect of various operational parameters such as concentration, temperature and sorption time on the adsorption of Cu2+ was investigated using batch adsorption process experiments. It was found that layered double hydroxide (LDH) can be used as adsorbent for the removal of copper ions in aqueous solution containing low concentration of the metal salt. The average values of activation energy, isosteric heat of adsorption, entropy and enthalpy were 1.447, 12.9, 0.0137 and ?4.8390 kJ/mol, respectively. This shows that the adsorption of the metal ion on the adsorbent follows a physical adsorption mechanism. The kinetic results conform to pseudo-second order model (R2 = 0.9959) and second order kinetic model (R2 = 0.9952) while the adsorption characteristics of the adsorbent followed both Langmuir and Freundlich adsorption isotherm models.

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Efficient Removal of Methylene Blue by Adsorption Using Composite Based Ca/Al Layered Double Hydroxide-Biochar

Global NEST Journal ◽

10.30955/gnj.003359 ◽

2020 ◽

Keyword(s):

Aqueous Solution ◽

Methylene Blue ◽

Adsorption Capacity ◽

Layered Double Hydroxide ◽

Adsorption Process ◽

Efficient Removal ◽

X Ray ◽

Edx Analyses ◽

As Adsorption ◽

Double Hydroxide

<p>Composite based Ca/Al layered double hydroxide and biochar was prepared using mixing coprecipitation method at pH 10. Composite and the starting materials was characterized using X-ray, FTIR, BET, thermal, and SEM-EDX analyses. Furthermore, composite was used as adsorbent of methylene blue from aqueous solution. Several factors that influencing the adsorption process was investigated such as adsorption time, initial concentration, and temperature adsorption. The performance of composite as adsorbent was evaluated by reusability process. The results showed that composite has diffraction peak at 9.82, 17.99, 19.86, 20.55, 29.32, 30.95, 32.65, 36.61, 37.00, 43.49, 47.15, 55.12, and 56.12 deg, which was based on diffraction of Ca/Al layered double hydroxide and biochar as starting materials. The surface area of composite was 158.291 m2/g and largely higher than starting materials. The morphology of composite also shows regularity shape than Ca/Al layered double hydroxide and biochar. Adsorption of methylene blue on composite showed that higher adsorption capacity (32.535 mg/g) than starting materials. The reusability of adsorbent showed that composite can be used several times ad adsorbent without loss adsorption capacity and these phenomena indicated composite is excellent material to remove dye from aqueous solution.</p>

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Ni/Cr-[α-SiW12O40] Layered Double Hydroxide as Effective Adsorbent of Iron(II) From Aqueous Solution

Eurasian Chemico-Technological Journal ◽

10.18321/ectj1080 ◽

2021 ◽

Vol 23 (2) ◽

pp. 103

Author(s):

A. Lesbani ◽

M.F. Azmi ◽

N.R. Palapa ◽

T. Taher ◽

R. Andreas ◽

...

Keyword(s):

Aqueous Solution ◽

Adsorption Capacity ◽

Layered Double Hydroxide ◽

Interlayer Space ◽

Physical Adsorption ◽

High Surface ◽

High Surface Area ◽

X Ray ◽

Endothermic Process ◽

Double Hydroxide

Layered double hydroxide (LDH) Ni/Cr intercalated [α-SiW12O40]4- has been prepared using the coprecipitation method. Materials were characterized by X-ray, FTIR, BET, and pHpzc analyses. Material Ni/Cr-[α-SiW12O40] LDHs exhibited a high surface area 98.986 m2 g-1 from 11.030 m2 g-1 for Ni/Cr LDH where the interlayer space was an increase from 7.99 to 10.87 Å with indicated that high crystallinity. Ni/Cr-[α-SiW12O40] LDHs showed higher adsorption capacity for iron(II) is up to 250 mg g-1. Adsorption of iron(II) on LDHs has an endothermic process and classify as physical adsorption.

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