Congo red dye removal from aqueous solution by acid-activated bentonite from sarolangun: kinetic, equilibrium, and thermodynamic studies

Taher, Tarmizi; Rohendi, Dedi; Mohadi, Risfidian; Lesbani, Aldes

doi:10.1080/25765299.2019.1576274

Cited by 49 publications

(31 citation statements)

References 42 publications

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“…The adsorption is the easiest method, cheapest, effective method to remove dyes from solution and furthermore, the adsorbent can be reused [10], [11]. Various materials have been examined and implemented as adsorbent to remove dyes from water such as bentonite [12], kaolinite [11], zeolite [13], montmorillonite [14] and layered double hydroxide [15].…”

Section: Several Treatments Methods Have Been Investigated Regarding Pmentioning

confidence: 99%

Preparation of copper aluminum-biochar composite as adsorbent of malachite green in aqueous solution

Palapa

Taher

Mohadi

et al. 2020

Preprint

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In this work, CuAl/Biochar (BC) composite was prepared by the coprecipitation method. The materials were applied to remove malachite green in aqueous solution. These materials were characterized using XRD, FTIR, BET and SEM-EDX analyses. The composite material was confirmed by X-ray diffractograms with reflection (002) at 24o and the appearance of new peaks at 1095 cm -1 . The BET result of CuAl/BC composite has larger surface area is 168 m 2 /g than 46 m 2 /g for LDH. The morphologies of composite materials show agglomeration and micro particle size. The result of the adsorption study indicated the composite material follows pseudo-second-order (PSO) and Langmuir isotherm models. The maximum adsorption capacity of malachite green using CuAl/BC uptake is 164.316 mg/g. The thermodynamic analysis indicates that the malachite green adsorption is spontaneous, endothermic. Regeneration study of adsorbent CuAl/BC composite shows after four times reused, it still has high removal efficiency at 89%.

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Section: Several Treatments Methods Have Been Investigated Regarding Pmentioning

confidence: 99%

Preparation of copper aluminum-biochar composite as adsorbent of malachite green in aqueous solution

Palapa

Taher

Mohadi

et al. 2020

Preprint

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“…The mixture of adsorbent and dye solution was mixed with a constant stirring speed of 400 rpm for a predetermined time, and the remaining dye concentration was analyzed by UV-vis spectrophotometry method. The parameter of adsorption kinetics was calculated according to its mathematical equation provided in the literature [10].…”

Section: Adsorption Studiesmentioning

confidence: 99%

Preparation and utilization of Keggin-type polyoxometalate intercalated Ni–Fe layered double hydroxides for enhanced adsorptive removal of cationic dye

et al. 2020

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The Ni-Fe layered double hydroxide (LDH) intercalated by Keggin-type polyoxometalate (POM) of SiW 12 O 40 4− was investigated for the first time. The synthesized Ni-Fe LDH and Ni-Fe POM were characterized by XRD, FT-IR, and N 2 adsorption-desorption isotherm to identify the intercalation process as well as their surface morphology. The obtained results indicated that after intercalated by POM, the interlayer distance of the LDH expanded due to the insertion of POM anion and removal of some native NO 3 − anion in the interlayer space. Moreover, the increment of the BET surface area of the material after intercalation indicated the opening of the interlayer space that beneficial for the adsorption process. The study on the malachite green adsorption onto the synthesized materials showed that POM intercalated LDH has better adsorption capacity than the original LDH, where the adsorption kinetic was better described by pseudo second order model than the pseudo first order model.

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“…The adsorption profile shows that physical adsorption has occurred in this research. The data of isotherm adsorption was obtain using Langmuir and Freundlich isotherms equation as follows 44 :…”

Section: Resultsmentioning

confidence: 99%

Citrate-Zn/Al Layered Double Hydroxide as Adsorbent of Congo Red from Aqueous Solution

Hidayati¹,

Palapa²,

Rahayu³

et al. 2020

Mediterr.J.Chem.,

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Layered double hydroxide (LDH) of Zn/Al and citrate-Zn/Al was prepared and used as an adsorbent of Congo red from aqueous solution. LDH was characterized by X-ray, FTIR, and BET analysis. Adsorption of Congo red was studied through kinetic, isotherm, and thermodynamic analyses. Zn/Al LDH has diffraction at 10.29o (003) with interlayer distance 8.59 Å and citrate-Zn/Al LDHs have anomalous diffraction at 7.57o (003) with interlayer distance 11.68 Å. The surface area of citrate-Zn/Al (40.50 m2 g-1) has higher than pristine LDH (1.97 m2 g-1). Adsorption of Congo red was conducted at pH 6 for Zn/Al LDH and at pH 8 for citrate-Zn/Al LDH. Adsorption of Congo red on both LDHs follows the pseudo-second-order kinetic model. The isotherm parameter follows the Freundlich isotherm model with maximum adsorption capacity 166.67 mg g-1 for Zn/Al and 249.99 mg g-1 for citrate-Zn/Al LDH. Adsorption of Congo red on both LDHs was classified as physical adsorption with energy 4.085-4.148 kJ mol-1.

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Congo red dye removal from aqueous solution by acid-activated bentonite from sarolangun: kinetic, equilibrium, and thermodynamic studies

Cited by 49 publications

References 42 publications

Preparation of copper aluminum-biochar composite as adsorbent of malachite green in aqueous solution

Preparation of copper aluminum-biochar composite as adsorbent of malachite green in aqueous solution

Preparation and utilization of Keggin-type polyoxometalate intercalated Ni–Fe layered double hydroxides for enhanced adsorptive removal of cationic dye

Citrate-Zn/Al Layered Double Hydroxide as Adsorbent of Congo Red from Aqueous Solution

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