Adsorption kinetics of methylene blue using alkali and microwave-modified apricot stones

Namal, Osman Önder; Kalıpcı, Erkan

doi:10.1080/01496395.2018.1541469

Cited by 22 publications

(8 citation statements)

References 64 publications

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“…It assumed that rate‐controlling step was controlled by chemisorption in the adsorption of MB dye onto MNPs‐PES beads. Besides, this model also indicated two adsorption kinetics were occurred either in series or in parallel: rapid adsorption and slow adsorption 3,15,22,24 …”

Section: Resultsmentioning

confidence: 87%

Application of the novel pH‐catalytic‐magnetic tri‐functionalities augmented bead for removal of organic dye pollutants

Yee

Shuit

et al. 2021

Env Prog and Sustain Energy

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A tri‐functionality magnetic nanoparticles (MNPs) are crucial for environmental remediation. This research focused on the synthesis of pH‐catalytic‐magnetic polymer beads for dye removal by using phase inversion technique. In 15 wt% of polyethersulfone (PES) polymer possessed the highest porosity (80%) was used in the synthesis of MNPs‐PES beads. The methylene blue (MB) removal efficiency of MNPs‐PES beads and PES beads was 72.94% and 62.67%, respectively. Similarly, the removal efficiency of methyl orange (MO) dye is higher for MNPs‐PES beads (38.56%) compared to PES beads (34.16%). Besides, the removal efficiency for MB dye by MNPs‐PES beads increased from 77.59% to 96.90% when solution pH increased from 3 to 9 while removal of MO dye increased from 61.14% to 74.35% when solution pH decreased from 9 to 3. Moreover, the removal efficiency for MB dye increased from 72.94% to 93.43% when H2O2 is added. Additionally, MNPs‐PES beads were recollected successfully using external magnet. These indirectly proved that the MNPs‐PES beads were responsive towards the tri‐functionalities of pH‐catalytic‐magnetic. Lastly, the adsorption of MB dye onto MNPs‐PES beads were fitted well to Langmuir isotherm model and pseudo‐second‐order model with both correlations R2 of more than 0.98.

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Section: Resultsmentioning

confidence: 87%

Application of the novel pH‐catalytic‐magnetic tri‐functionalities augmented bead for removal of organic dye pollutants

Yee

Shuit

et al. 2021

Env Prog and Sustain Energy

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“…In each case of removing the metal ions, the following relation was observed: Pb 2+ > Cu 2+ [ 33 ]. Data on the sorption capacity of the biomass of leaves, sawdust and kernel shells of apricots are shown in Figure 7 [ 32 , 33 , 34 , 35 ].…”

Section: Resultsmentioning

confidence: 99%

Removing Pollutants from Sewage Waters with Ground Apricot Kernel Shell Material

et al. 2022

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For the first time, a comprehensive review of the literature data on the use of apricot (Prunus armeniaca) biomass components as a sorption material for the treatment of wastewater and environmental water from various pollutants is carried out in the present study. In addition to a comprehensive analysis of contemporary studies, the current work carried out its own microstructural and energy dispersive studies. It shows that apricot kernel shell is a promising raw material for obtaining sorption materials that can be used to extract various pollutants from aqueous media. The parameters of sorption interaction are presented, at which the highest rate of removal of pollutants was achieved. It is shown that the sorption capacity of apricot biomass components can be increased by modifying it with various chemical reagents, as well as other physical and physicochemical methods. We reveal that most publications consider the use of the latter as a raw material for the production of activated carbons. It is established that the surface area and total pore space of activated carbons from apricot kernel shells depend on the modes of carbonization and activation. It is shown that activated carbons are effective adsorbents for removing various pollutants (metal ions, dyes, oil and oil products) from aqueous media. It was found that the adsorption isotherms of pollutants in most cases are best described by the Langmuir and Freundlich models, and the process kinetics is most often described by the pseudo-second-order model. The possibility of improving the sorption characteristics of apricot biomass during chemical or physicochemical treatment is also shown.

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“…Positively charged sites may decrease and negatively charged sites may increase, as the pH increases. The increase in negative charges on the adsorbent surface at high pHs creates an electrical double layer and changes the polarity of the adsorbent, which induces adsorption capacity [31]. The optimum pH of MB solution was previously recorded at 11.2-11.5 for microwave treated grape peel [27], 7 for ZnCl2-AC of hazelnut husk [16] and below 5 for microwave treated bamboo charcoal [32].…”

Section: Adsorption Of Mbmentioning

confidence: 99%

“…Temperature increase results in an increase in the adsorption capacity of pollutants in endothermic reactions and a decrease in exothermic reactions [34]. The MB adsorption on the heat-, chemical-or microwave-treated organic wastes has been mostly stated as an endothermic process [12,16,26,[31][32][33][34][35].…”

Section: Adsorption Of Mbmentioning

confidence: 99%

Production of chemically and microwave activated hazelnut husk as an adsorbent for dye contaminated wastewaters

Ülgüdür¹,

ELİBOL²,

Malkoç³

2021

Journal of Innovative Science and Engineering (JISE)

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Adsorption has traditionally been evaluated as an economical and easily applicable process for treating certain wastewaters, such as ones including dyes and heavy metals. Even though adsorbent materials specifically produced for the purpose of wastewater treatment commercially exist, the production cost may create an economic burden on wastewater treatment processes. Agricultural wastes can be valorized as adsorbents in adsorption processes. The adsorption capacity of these wastes can be improved via pre-treatment methods such as chemical application and microwave irradiation. This study investigated the potential applicability of hazelnut husk as an adsorbent for methylene blue (MB) dye. To this purpose, the husk was activated by sequential chemical or water and microwave applications.Structural analysis on the produced adsorbent was performed by Fourier transform infrared spectrophotometry (FTIR) and field emission scanning electron microscopy (FE-SEM).Isotherm (Langmuir, Freundlich, Temkin and Harkins-Jura isotherms) and kinetic (pseudofirst-order, pseudo-second-order, Elovich and intraparticle diffusion kinetic models) behaviours of adsorption were also evaluated. The results indicated that MB could be removed by 92-94% considering all adsorbents produced. Further isotherm and kinetic studies revealed that MB adsorption was both physically and chemically induced, and the reaction followed the pseudo-second-order kinetic model (R 2 >0.99).

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Adsorption kinetics of methylene blue using alkali and microwave-modified apricot stones

Cited by 22 publications

References 64 publications

Application of the novel pH‐catalytic‐magnetic tri‐functionalities augmented bead for removal of organic dye pollutants

Application of the novel pH‐catalytic‐magnetic tri‐functionalities augmented bead for removal of organic dye pollutants

Removing Pollutants from Sewage Waters with Ground Apricot Kernel Shell Material

Production of chemically and microwave activated hazelnut husk as an adsorbent for dye contaminated wastewaters

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