Ultrasonic enhanced adsorption of methylene blue onto the optimized surface area of activated carbon: Adsorption isotherm, kinetics and thermodynamics

Egbosiuba, Titus Chinedu; Abdulkareem, A. S.; Kovo, A. S.; Afolabi, Eyitayo Amos; Tijani, Jimoh Oladejo; Auta, M.; Roos, W.

doi:10.1016/j.cherd.2019.10.016

Cited by 169 publications

(45 citation statements)

References 67 publications

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“…Based on previous studies and considering the enthalpy value (-46.56 kJ/mol), the biosorption process of MB onto MDCV/ 3 4 , is considered as almost physical biosorption [69,70]. The negative value of ∆ also indicates a reduction in randomness and irregularity of MB particles when they are placed on the active sites of biosorbent [71]. is good.…”

Section: Biosorption Thermodynamicmentioning

confidence: 99%

WITHDRAWN: Highly Efficient Magnetic Phosphoric Acid Modified Defatted Chlorella Vulgaris Algae ( MDCV/Fe3O4) as a Novel Biosorbent for Methylene Blue Removal

Salehi

Naziri

2021

Preprint

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Background:A novel biosorbent based on defatted Chlorella vulgaris (DCV) as a by-product of the biofuel industry was considered as an economical and inexpensive biosorbent in the form of magnetic modified defatted Chlorella vulgaris (MDCV/Fe3O4) for methylene blue (MB) removal. The lipid extraction was performed on raw Chlorella vulgaris (RCV). Phosphoric acid was selected as a DCV modifier. During acid modification, the variables affecting the biosorption capacity and the residual algae such as temperature (30-70 ), the contact time of DCV with acid (3-9 hr), the concentration of acid (2-6 mol/L), and the ratio of acid volume to DCV (30-70 mL/g) were investigated and optimized using Minitab-18 software. The modified defatted Chlorella vulgaris (MDCV) was prepared by acidification of DCV under optimal conditions. MDCV/ was prepared using the co-precipitation method for easy and low-cost separation of biosorbent. The XRD, FTIR, SEM, EDS, BET, and VSM analyses were performed to identify the structures and characteristics of RCV, DCV, MDCV, and MDCV/. Some experimentsere designed using Minitab-18 software to investigate the effects of temperature (5-45 ), contact time (30-90 min), biosorbent dosage (15-45 mg), initial concentration of MB (20-100 mg/L), and pH (5-9) on the biosorption capacity of MDCV/. The kinetic, isothermal and thermodynamic parameters were investigated on MDCV/.Results:The specific surface area of MDCV/ was 25.20 . RCV, DCV, and MDCV/ had a crystalline structure and MDCV had an amorphous structure. The data were most consistent with Pseudo-second-order and Freundlich models. The maximum biosorption capacity of MDCV/ was calculated in the amount of 32.44‌ mg/g. According to the positive values of and negative values of (-46.56 kJ/mol) and (-0.17 kJ/mol.K), the biosorption of MB on MDCV/ was non-spontaneous, exothermic with a decrease in irregularity.Conclusions:In this study, MDCV/ was applied as the MB biosorbent. Modifications such as lipid extraction, phosphoric acid modification and magnetization improved this biosorbent in its biosorption capacity and separation. Data were optimized in the acid modification and MB biosorption steps. Comparison of the characteristics of MDCV/ with unmodified species confirmed its high efficiency. Kinetic, isothermal and thermodynamic studies were also performed.

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Section: Biosorption Thermodynamicmentioning

confidence: 99%

WITHDRAWN: Highly Efficient Magnetic Phosphoric Acid Modified Defatted Chlorella Vulgaris Algae ( MDCV/Fe3O4) as a Novel Biosorbent for Methylene Blue Removal

Salehi

Naziri

2021

Preprint

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“…It is likely that activated carbon can adsorb CIPC due to π-π stacking interactions between the CIPC ring structure and the activated carbon hexagonal cells. π-π stacking interaction was also found to be the dominant force on the surface of graphene oxide (structurally similar to activated carbon) for the deposition of porphyrin (a group of heterocyclic organic compounds) [43][44][45][46].…”

Section: Sorption Isothermmentioning

confidence: 99%

A Simple Approach for Determining the Maximum Sorption Capacity of Chlorpropham from Aqueous Solution onto Granular Activated Charcoal

Alsehli

2020

Processes

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UV-Vis spectrophotometer was used to determine chlorpropham (CIPC) concentration in aqueous solution. The method was validated in term of linearity, precision and limit of detection and limit of quantitation. The correlation coefficient of standards calibration curve of (1.0–10.0 µg/mL CIPC) was R2 = 1 with a precision (RSD%, n=10) ranged from (0.87–0.53%). The limit of detection (LOD) and limit of quantitation (LOQ) based on the regression statistics of the calibration curve data of (1.0–10.0 µg/mL CIPC) were 0.04 µg/mL and 0.11 µg/mL respectively. The activated carbon adsorbent was found to be effective for the removal approximately 80% of CIPC from aqueous solution. Several isotherm models (Langmuir, Freundlich, Tempkin and Dubinin–Radushkevich) were evaluated. The maximum monolayer sorption capacity (Qm) from the Langmuir isotherm model was determined to be (44316.92 µg/g). The separation factor (RL) is 0.11 which indicates a favorable equilibrium sorption with the R2 value of 0.99, indicating that the Langmuir isotherm model fit the experimental sorption data well.

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“…An adsorption isotherm exhibits the relationship between adsorption capacity (q e , mg g À 1 ) and equilibrium concentration of metal ions (C e , mg L À 1 ) [9,18] . The isotherms of MB and acetamiprid adsorption onto AA@Fe 3 O 4 NPs@AC were shown in Figure 10.…”

Section: Adsorption Isothermsmentioning

confidence: 99%

“…[6] Among these methods, the adsorption process has been preferred that this can be attributed to its costeffective and high performance for treating effluents. [7,8] Much research for removing MB dye using various adsorbent such as manganese-cobaltite nanospinel, [9] TiO 2 NPs@ZIF-8 composite, [10] magnetic chitosan, [11] graphene oxide (MCGO), [12,13] magnetic zeolites, [14] magnetic alginate/rice husk, [15] metal-organic framework nanocomposite, [16] TiO 2 NPs@ZIF-8 composite [17] and activated carbon [18] have been developed. Activated carbon as one of the effective adsorbent has been developed to deal with the dye and pesticides in wastewater; this may be because a) the activated carbon is known as a low-cost, eco-friendly, bio-based and renewable sorbent that can prepare from agricultural waste, so it is benifical in removing organic compounds from wastewater and b) activated carbons have extensively advanced physical and chemical properties, becuse there are in them structure large surface area, large pore volumes and existence of numerous functional groups such as carboxyl, hydroxyl, etc., that finally lead to enhancement in removal efficiency.…”

Section: Introductionmentioning

confidence: 99%

Bioadsorbent from Magnetic Activated Carbon Hybrid for Removal of Dye and Pesticide

Nejadshafiee

Islami

2020

ChemistrySelect

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A novel bioadsorbent has been developed based on the framework of activated carbon, Fe3O4 nanoparticles, and ascorbic acid (AA@Fe3O4 NPs@AC). The objective of this study was efficient adsorption of organic compounds such as dye and pesticide from aqueous solutions by AA@Fe3O4 NPs@AC adsorbent. The structure of AA@Fe3O4 NPs@AC was characterized by TEM, TGA, FTIR, VSM, XRD, BET and Zeta potential. Moreover, the adsorption process of dye and pesticide compounds on AA@Fe3O4 NPs@AC was systematically considered and was found which the pseudo‐second‐order kinetic equation and Langmuir isotherm model conformed. The maximum adsorption capacities of AA@Fe3O4 NPs@AC for methylene blue (MB) dye and acetamiprid pesticide compounds were 370.37 and 357.14 mg g−1, respectively that revealed excellent adsorption performance of AA@Fe3O4 NPs@AC adsorbent. On the other hand, with easy and high recovery of AA@Fe3O4 NPs@AC through magnetic separation has provided a simple and green method to enhance the efficiency of bio‐adsorbent for remove of dyes and pesticides from contaminated water.

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Ultrasonic enhanced adsorption of methylene blue onto the optimized surface area of activated carbon: Adsorption isotherm, kinetics and thermodynamics

Cited by 169 publications

References 67 publications

WITHDRAWN: Highly Efficient Magnetic Phosphoric Acid Modified Defatted Chlorella Vulgaris Algae ( MDCV/Fe3O4) as a Novel Biosorbent for Methylene Blue Removal

WITHDRAWN: Highly Efficient Magnetic Phosphoric Acid Modified Defatted Chlorella Vulgaris Algae ( MDCV/Fe3O4) as a Novel Biosorbent for Methylene Blue Removal

A Simple Approach for Determining the Maximum Sorption Capacity of Chlorpropham from Aqueous Solution onto Granular Activated Charcoal

Bioadsorbent from Magnetic Activated Carbon Hybrid for Removal of Dye and Pesticide

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Ultrasonic enhanced adsorption of methylene blue onto the optimized surface area of activated carbon: Adsorption isotherm, kinetics and thermodynamics

Cited by 169 publications

References 67 publications

WITHDRAWN: Highly Efficient Magnetic Phosphoric Acid Modified Defatted Chlorella Vulgaris Algae ( MDCV/Fe3O4)&nbsp;as a Novel Biosorbent for Methylene Blue Removal

WITHDRAWN: Highly Efficient Magnetic Phosphoric Acid Modified Defatted Chlorella Vulgaris Algae ( MDCV/Fe3O4)&nbsp;as a Novel Biosorbent for Methylene Blue Removal

A Simple Approach for Determining the Maximum Sorption Capacity of Chlorpropham from Aqueous Solution onto Granular Activated Charcoal

Bioadsorbent from Magnetic Activated Carbon Hybrid for Removal of Dye and Pesticide

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Product

Resources

About

WITHDRAWN: Highly Efficient Magnetic Phosphoric Acid Modified Defatted Chlorella Vulgaris Algae ( MDCV/Fe3O4) as a Novel Biosorbent for Methylene Blue Removal

WITHDRAWN: Highly Efficient Magnetic Phosphoric Acid Modified Defatted Chlorella Vulgaris Algae ( MDCV/Fe3O4) as a Novel Biosorbent for Methylene Blue Removal