Methylene blue adsorption from aqueous solution by functionalized perlites: an experimental and computational chemistry study

Söğüt, Eda Gökırmak; Ergan, Erdem; Kılıç, Necla Çalışkan; Dönmez, Hakan; Akbaş, Esvet

doi:10.5004/dwt.2021.26752

Cited by 6 publications

(2 citation statements)

References 67 publications

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“…Methylene blue dye in solution will dissociate into cations. At low pH, the perlite surface is positively charged due to excess H+ ions [16] which creates a repulsion force from the perlite thus limiting the cations from methylene blue to fill the perlite surface. The increase in pH makes perlite negatively charged so that methylene blue cations are more easily adsorbed to the perlite surface [14] .…”

Section: Effect Of Optimum Phmentioning

confidence: 99%

The Use of Nitric Acid as a Perlite Activator in Adsorbing Methylene Blue

Utami,

Riyani,

Setyaningtyas

2023

indonesian

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Industrial activities in modern times that are growing rapidly can cause environmental problems. This is due to the increasing amount of waste generated due to increased production. Untreated dye waste can inhibit sunlight penetration, photosynthesis activity, and the growth of aquatic biota. One of the dye wastes that is often found is methylene blue. Processing of methylene blue dye can use a practical adsorption method, easy to do at a low cost. This study showed the results of methylene blue adsorption using activated perlite nitric acid adsorbent. The best activity of perlite in adsorbing methylene blue is at pH 9 with a contact time of 180 minutes which results in a maximum adsorption capacity of 3,873 mg/g. The adsorption kinetics used followed a pseudo second order-model with consecutive k and q values of 0.0055 g/mg.min and 3.3102 mg/g, while the adsorption isotherms followed the Langmuir isotherm model with qmax and KL values of 3.873 mg/g and 0.5822 L/mg, respectively.

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Section: Effect Of Optimum Phmentioning

confidence: 99%

The Use of Nitric Acid as a Perlite Activator in Adsorbing Methylene Blue

Utami,

Riyani,

Setyaningtyas

2023

indonesian

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“…It is worth noting that several processes like chemical coagulation, electrochemical removal, membrane filtration, photodegradation reactions, and physical adsorption have been applied to remove MB from industrial effluents [7]. Among these measures, adsorption has been introduced as an effective way to remove MB from aquatic solutions [8].…”

Section: Introductionmentioning

confidence: 99%

Effect of Hydrochar Modification on the Adsorption of Methylene Blue from Aqueous Solution: An Experimental Study Followed by Intelligent Modeling

Kohzadi,

Marzban,

Godini

et al. 2023

Water

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Wheat straw, which is a carbon-rich precursor and a common agriculture waste in Sanandaj, was modified to produce hydrochar with high adsorption capacity by the hydrothermal carbonization (HTC) method. The hydrochars were tested as adsorbents to remove methylene blue (MB) from aqueous solution, and the effects of various interfering parameters, including pH, MB concentration, and adsorbent dosage, were investigated using artificial neural networks (ANNs) on adsorption modeling. Adsorption isotherms and kinetics were studied to explain the MB adsorption process. The prepared hydrochars were characterized using Brunauer–Emmett–Teller (BET), scanning electron microscopy-energy dispersive X-ray analysis (SEM-EDAX), and high-performance liquid chromatography (HPLC) instruments. The maximum MB removal efficiency achieved by hydrochar modified by KOH (0.1 M) and adsorption data fitted well with the Langmuir isotherm and pseudo-second-order kinetics. In terms of elemental composition, the hydrochar sample contained 52.19% carbon (C), 3.37% hydrogen (H), 0.1% nitrogen (N), 0.15% sulfur (S), and 35.66% oxygen (O). The ash content in the sample was 8.50%. The recorded hydrogen-to-carbon ratio (H/C) and oxygen-to-carbon ratio (O/C) indicated a shift towards humification, implying the influence of KOH addition during the hydrochar production process. Additionally, the specific surface area of the hydrochar, as measured by the BET method, was found to be 11.54 m²/g. Among the aromatics, a significant presence of hydroxymethylfurfural (HMF) was detected, with a concentration of 4.70 g/kg DM. The modeling results demonstrated that the concentration of MB had the most substantial impact on the predicted removal, followed by pH, adsorbent dosage, and contact time.

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A new material fabricated by the combination of natural mineral perlite and graphene oxide: Synthesis, characterization, and methylene blue removal

Onat,

Ekinci

2024

Diamond and Related Materials

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Methylene blue adsorption from aqueous solution by functionalized perlites: an experimental and computational chemistry study

Cited by 6 publications

References 67 publications

The Use of Nitric Acid as a Perlite Activator in Adsorbing Methylene Blue

The Use of Nitric Acid as a Perlite Activator in Adsorbing Methylene Blue

Effect of Hydrochar Modification on the Adsorption of Methylene Blue from Aqueous Solution: An Experimental Study Followed by Intelligent Modeling

A new material fabricated by the combination of natural mineral perlite and graphene oxide: Synthesis, characterization, and methylene blue removal

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