Influence of the alkyl chain length of surfactant on adsorption process: A case study

Shayesteh, Hadi; Raji, Farshad; Kelishami, Ahmad Rahbar

doi:10.1016/j.surfin.2020.100806

Cited by 79 publications

(25 citation statements)

References 50 publications

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“…In the case of RO16 adsorption, 10 mg was the optimal adsorbent dosage. After the optimum values, adding more adsorbents leads to agglomeration of the active sites on the adsorbent, decreasing the adsorption efficiency 56 . Therefore, adjusting the adsorbent dosage to optimum value is also beneficial from the economic aspect.…”

Section: Resultsmentioning

confidence: 99%

Adsorption behavior of rhamnolipid modified magnetic Co/Al layered double hydroxide for the removal of cationic and anionic dyes

Kheradmand

Negarestani

Kazemi

et al. 2022

Sci Rep

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In the present research, magnetic rhamnolipid-Co/Al layered double hydroxide (MR-LDH) was synthesized to uptake methylene blue (MB) and reactive orange 16 (RO16) from aqueous solution. The main parameters, including pH, adsorbent dosage, contact time, and initial analyte concentration, were optimized to achieve the best adsorption efficiency. Accordingly, the elimination of MB on MR-LDH is improved in the basic medium due to the electrostatic interactions between the negative charge of MR-LDH and the positive charge of MB dye. In contrast, the acidic medium (pH = 3) was favored for RO16 adsorption because of hydrogen bonding between the protonated form of azo dye and protonated hydroxyl groups at the surface of MR-LDH. The calculated maximum adsorption capacities for MB and RO16 were 54.01 and 53.04 mg/g at 313 K, respectively. The Langmuir model, which assumes monolayer adsorption on the adsorbent surface, provides the best explanation for the adsorption of both dyes (R2 = 0.9991 for MB and R2 = 0.9969 for RO16). Moreover, the pseudo-second-order kinetic model best described the adsorption process for MB (R2 = 0.9970) and RO16 (R2 = 0.9941). The proposed adsorbent maintains stable adsorption performance for four consecutive cycles. After each adsorption process, MR-LDH is easily separated by an external magnet. The findings show that MR-LDH was found to be an excellent adsorbent for the removal of both cationic and anionic organic dyes from aqueous solutions.

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Section: Resultsmentioning

confidence: 99%

Adsorption behavior of rhamnolipid modified magnetic Co/Al layered double hydroxide for the removal of cationic and anionic dyes

Kheradmand

Negarestani

Kazemi

et al. 2022

Sci Rep

Self Cite

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“…However, the adsorption capacity of ZSM-5@ PDA−CNT decreased slightly under alkaline conditions, which was probably due to the weakened electrostatic interaction between ZSM-5@PDA−CNT and MB molecules. 51 To further study the adsorption mechanism, pseudo-firstorder (eq 7) and pseudo-second-order (eq 8) models were used to fit the adsorption data 45,52,53 q q q k t ln( ) ln( )…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…To further study the adsorption mechanism, pseudo-first-order (eq ) and pseudo-second-order (eq ) models were used to fit the adsorption data ,, Among them, k 1 and k 2 are the rate constants of the model and q e and q t (mg/g) are the equilibrium adsorption capacity of materials for MB and the adsorption capacity in time t , respectively.…”

Section: Resultsmentioning

confidence: 99%

Carbon Nanotubes/Polydopamine/ZSM-5 Composite Soil Conditioner with Good Controlled Release and Adsorption Properties

Yang

Zhang

et al. 2022

Langmuir

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Currently, the excessive application of fertilizers and the random discharge of waste water, waste gas, and residues have led to more and more serious soil pollution problems. Zeolite is the most promising material for preparing a green and environmentally friendly soil conditioner. Herein, the carbon nanotubes/polydopamine/ZSM-5 composite soil conditioner was prepared by a facile two-step method, and it was used to release fulvic acid and adsorb methylene blue to improve the environment. The cumulative release rate of the composite soil conditioner was 52% within 430 h for fulvic acid, which had a good sustained release effect and could be sustained-released in different acid-based surroundings. In addition, it showed a good adsorption capacity of methylene blue, and it is about 80.02 mg/g which was about six times higher than that of ZSM-5. It was beneficial for the adsorption of methylene blue in a neutral environment. Finally, it could promote the growth of brassica chinensis and maize, and the promotion effect was 60 and 35%, respectively. Therefore, the carbon nanotubes/polydopamine/ZSM-5 composite soil conditioner is a green and efficient material, which provides a new strategy to solve the problem of soil pollution.

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“…Pseudo 2 nd order model [33]: t/q t = [1/(k 2 .q e 2 )]+ t/q e Intraparticle diffusion model [34][35][36]: q t = k i t 0.5 + c…”

Section: Kinetic Studiesmentioning

confidence: 99%

Unexpected behavior during methylene blue adsorption over H-titanate nanotubes and nanosheets

et al. 2022

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Influence of the alkyl chain length of surfactant on adsorption process: A case study

Cited by 79 publications

References 50 publications

Adsorption behavior of rhamnolipid modified magnetic Co/Al layered double hydroxide for the removal of cationic and anionic dyes

Adsorption behavior of rhamnolipid modified magnetic Co/Al layered double hydroxide for the removal of cationic and anionic dyes

Carbon Nanotubes/Polydopamine/ZSM-5 Composite Soil Conditioner with Good Controlled Release and Adsorption Properties

Unexpected behavior during methylene blue adsorption over H-titanate nanotubes and nanosheets

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