Enhanced adsorption performance of Reactive Red 120 azo dye from aqueous solution using quaternary amine modified orange peel powder

Munagapati, Venkata Subbaiah; Wen, Jet‐Chau; Pan, Chih-Long; Yuvaraja, Gutha; Wen, Jyh‐Horng

doi:10.1016/j.molliq.2019.04.081

Cited by 84 publications

(28 citation statements)

References 66 publications

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“…Pseudo second order kinetic model was appropriately the best model to predict the kinetics of adsorption of MO on both adsorbents as shown by the correlation coefficient, non-linear Chi-square and close agreement between q e experimental and q e calculated (Table 3). This validates the domination of adsorption process by chemisorption as calculated from the energy of adsorption (Munagapati et al 2019;Beh et al 2020;Moawad et al 2020). Regression model for predicting adsorption kinetics follows a similar trend to experimental data with improved correlation coefficients.…”

Section: Adsorption Kinetic Studysupporting

confidence: 75%

“…However, contending with drawbacks associated with some of the above-mentioned methods as well as expensiveness of many adsorbents, different studies have reported applications of inexpensive and readily available adsorbents especially activated carbons from waste materials. These are also not without limitations as typically used adsorbents are macro-scaled and therefore large quantities would be used to achieve excellent results (Munagapati et al 2019;Pavithra et al 2019;Azeez et al 2018Azeez et al , 2020a.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis, Characterization and Anionic Dye Sequestration Capacity of Cellulose Nanocrystals Derived From Sugarcane Bagasse: Experimental and Regression Modelling

Azeez

Adejumo

Oyedeji

et al. 2020

Preprint

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This study reported the extraction of cellulose nanocrystals from sugarcane bagasse using acid hydrolysis method. Nanocrystals were characterized with scanning electron microscopy, energy dispersive X-ray, Fourier Transform Infra-Red spectroscopy and investigated for their adsorptive capacity for methyl orange (MO) sequestration. The disappearance of peaks at 1736 and 1429 cm-1 in addition to higher carbon content, greater crystallinity index from 1.09 to 1.21, predominantly nano range of particles (0.045 – 0.082 µm) and larger porosity are parameters that better-defined cellulose nanocrystals. A 2-fold improvement in monolayer adsorption capacity was obtained for cellulose nanocrystals (432.17mgg-1) described by Langmuir isotherm over bagasse (170.99 mgg-1) described by Freundlich isotherm. Adsorption processes on both adsorbents were spontaneous, exothermic and best fitted to pseudo second order kinetics ensuing chemisorption. Polynomial regression model appropriately predicted equations that best describe the effects of different batch adsorption parameters on MO removal with better fittingness than experimentally generated data.

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Section: Adsorption Kinetic Studysupporting

confidence: 75%

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization and Anionic Dye Sequestration Capacity of Cellulose Nanocrystals Derived From Sugarcane Bagasse: Experimental and Regression Modelling

Azeez

Adejumo

Oyedeji

et al. 2020

Preprint

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show abstract

“…Since adsorption process is a surface occurrence, adsorbent quality will be functions of number and nature of pores [41,42]. As obtained for SEM in this study, it indicates CCNC had best qualities for uptake of MO as it has been previously reported that rough surfaces with developed cavities are more favourable for adsorption of pollutants [29,49]. EDX analysis was used to reveal elemental compositions and percentages of prominent elements present in the three adsorbents ( Table 2).…”

Section: Morphological and Elemental Characteristics Of CC Fcc And Ccncsupporting

confidence: 52%

“…Adsorption process is a surface phenomenon that is dependent on the surface chemistry and characteristic pores. The presence of these functional groups on adsorbents' surfaces would enhance electrostatic interactions of adsorbent-adsorbate and would play important role in the adsorption of MO [42,49]. These functional groups have been found to be responsible for removal of dyes in other studies via formation of covalent bonds and matrix between active sites on adsorbents and adsorbates [38,50].…”

Section: Surface Chemistry Of CC Fcc and Ccncmentioning

confidence: 99%

Nanostructured and surface functionalized corncob as unique adsorbents for anionic dye remediation

et al. 2020

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This study describes synthesis and characterization of corncob (CC), corncob nanocellulose (CCNC) and functionalized corncob (FCC) as unique adsorbents for methyl orange (MO) removal. Nanocellulose was synthesized via H 2 SO 4 hydrolysis and functionalization was achieved using H 3 PO 4 . All adsorbents were characterized by scanning electron microscopy coupled with energy dispersive X-ray and Fourier transform infra-red spectroscopy. Functionalization modified surface chemistry (disappearance of OH and appearance of PO 4 3− ), increased percentage carbon by 41.42% and produced welldeveloped pores. Nanocellulose retained intrinsic chemical properties of corncob though more porous with enhanced surface functionality prompted by more intense functional groups peaks and appearance of SO 4 2− . Maximum adsorption of MO occurred at pH 3.01, 4.11 and 2.09 for CC (54.34%), FCC (77.1%) and CCNC (96.81%) respectively. Adsorption parameters were fitted to four adsorption isotherms with Langmuir being the most appropriate to describe the adsorption process. Adsorption capacity increased from 17.86 mg g −1 in corncob to 60.82 mg g −1 in FCC and 206.67 mg g −1 in CCNC implying CCNC had the highest adsorption quality. The rate of adsorption was most accurately predicted by pseudo first order kinetics. Adsorption mechanism was governed by film diffusion with contribution from intra-particle diffusion. Adsorption process was spontaneous (− ∆G o ) at all temperatures (303-315 K), exothermic (− ∆H o ) and physical on CC (3.73 kJ mol −1 ) and CCNC (3.42 kJ mol −1 ) however it was endothermic (+ ∆H o ) and chemical on FCC (12.86 kJ mol −1 ). This study shows that CCNC is comparatively the best adsorbent with highest adsorption capacity.

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“…The initial rapid increase in the adsorption rate is attributed to the availability of more adsorption sites. After 35 min, adsorption decreases with the increase in contact time that this may be due to desorption process [64,65]. Figure 13 shows the effect of sorbent type and its dosage on the removal of Pb(II) while all other experimental conditions are kept constant at optimum conditions.…”

Section: Effect Of Contact Timementioning

confidence: 99%

A comparative study of micro- and nano-structured di-nuclear Co(II) complex, designed to produce efficient nano-sorbent of Co3O4 applicable in the removal of Pb2+

Razmara

2020

SN Appl. Sci.

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A di-nuclear inorganic complex, formulated as [Co 2 (H 2 O) 5 (pdc) 2 ]·2H 2 O (1) that pdc 2− is pyridine-2,6-dicarboxylato has been synthesized under hydrothermal condition and sonochemical irradiation. Depending on the synthetic conditions, different morphology has been obtained for complex 1. Complex 1 hydrothermal (hc) which obtained as single crystal is a micro-structured compound and was characterized by single crystal X-ray diffraction. Complex 1 ultrasound (uc) is a nano-structured compound and obtained as precipitate. Structural comparison of hc and uc by Fourier-transform infrared spectroscopy (FT-IR), powder X-ray diffraction, and scanning electron microscopy (SEM) revealed that both synthesized complexes have the same structure with different particles size and morphology. In this study, a new synthetic route has been developed to prepare Co 3 O 4 nanoparticles for environmental catalytic applications. Effective sorbents Co 3 O 4 -hc and Co 3 O 4 -uc were prepared by thermolysis of dinuclear cobalt complexes and characterized by FT-IR, SEM, XRD, and Brunauer-Emmett-Teller specific surface area. Co 3 O 4 -hc and Co 3 O 4 -uc were used as nano-sorbents for the removal Pb(II) from aqueous solution. Detailed sorption studies showed that both synthetic sorbents are valuable to remove Pb(II) from wastewater. The effective catalytic performance of the as-prepared sorbents can be attributed to the physicochemical features of synthetic catalysts, such as mesoporous nature, homogenous dispersion of the active phase, small particle size and high surface area. The effects of contact time, pH, Pb(II) and adsorbent dosage to remove Pb(II) were investigated. Maximum adsorption percent of Co 3 O 4 -hc and Co 3 O 4 -uc at room temperature were found to be 90 and 92.2%, respectively. The selectivity of the as-prepared catalysts toward metal ions Pb(II), Co(II), Cr(III), Cu(II), Fe(II), Hg(II), Mn(II) and Ni(II) exhibited that Co 3 O 4 catalysts have the highest selectivity toward Pb(II). Also, the synthetic catalysts Co 3 O 4 -hc and Co 3 O 4 -uc showed an excellent cycling performance for Pb(II) removal up to 85.3 and 83.4% recovery over five cycles.

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Enhanced adsorption performance of Reactive Red 120 azo dye from aqueous solution using quaternary amine modified orange peel powder

Cited by 84 publications

References 66 publications

Synthesis, Characterization and Anionic Dye Sequestration Capacity of Cellulose Nanocrystals Derived From Sugarcane Bagasse: Experimental and Regression Modelling

Synthesis, Characterization and Anionic Dye Sequestration Capacity of Cellulose Nanocrystals Derived From Sugarcane Bagasse: Experimental and Regression Modelling

Nanostructured and surface functionalized corncob as unique adsorbents for anionic dye remediation

A comparative study of micro- and nano-structured di-nuclear Co(II) complex, designed to produce efficient nano-sorbent of Co3O4 applicable in the removal of Pb2+

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