Adsorption Kinetics and Thermodynamics of Auramine-O on Sugarcane Leaf-Based Activated Carbon

Qi, Congliang; Meng, Ming; Liu, Qingye; Kang, Caiyan; Huang, Siyu; Zhou, Zhenming; Chen, Chunqiang

doi:10.1080/01932691.2014.973036

Cited by 11 publications

(6 citation statements)

References 17 publications

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“…Negative Δ H values indicated that HCPT adsorption by CMC/GO@MIPs and CMC/GO@NIPs surfaces is an exothermic process. HCPT adsorption by the CMC/GO@MIPs surface is mainly a physical phenomenon when |Δ H | is less than 40 kJ/mol . The positive values of Δ S at concentrations of 0.08 and 0.14 mg/mL indicated a large amount of HCPT adsorption on the CMC/GO@MIPs surface.…”

Section: Resultsmentioning

confidence: 97%

“…HCPT adsorption by the CMC/GO@MIPs surface is mainly a physical phenomenon when |ΔH| is less than 40 kJ/mol. 36 The positive values of ΔS at concentrations of 0.08 and 0.14 mg/ mL indicated a large amount of HCPT adsorption on the CMC/GO@MIPs surface. The HCPT concentration in the surrounding solvent molecules reduced, whereas the degree of freedom of the solvent molecules increased.…”

Section: Adsorption Isothermsmentioning

confidence: 93%

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Molecularly Imprinted Polymer Based on Carboxymethylcellulose/Graphene Oxide Composites for Selective Adsorption of Hydroxycamptothecin

Nie

Ahmad

et al. 2022

ACS Appl. Polym. Mater.

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Molecularly imprinted polymers based on carboxymethylcellulose/graphene oxide composites (CMC/GO@MIPs) were prepared using surface molecular imprinting technology for the adsorption of hydroxycamptothecin (HCPT). Using molecular simulations, methacrylic acid was selected as a suitable monomer via a preliminary green scheme. The structure and adsorption properties of CMC/GO@MIPs were investigated through various characterization methods and adsorption experiments. The adsorption mechanism was examined using an adsorption model. The Langmuir isotherm model and pseudo-second-order kinetic model matched well with the adsorption results, with a maximum adsorption capacity of 62.92 mg/g. Adsorption equilibrium was achieved within 30 min. Further, CMC/GO@MIPs exhibited excellent selectivity for HCPT (imprinting factor of 2.60) and good recyclability; the adsorption capacity decreased by only 10.50% after seven adsorption–desorption cycles. The purity of HCPT was 50.94% after separation in the actual sample. CMC/GO@MIPs prepared in this study are simple and convenient to use and display high specificity, extraction efficiency, stability, and reusability for the separation and enrichment of HCPT. This study provides a method for the separation and purification of HCPT in Camptotheca acuminata Decne and is an important reference for the separation, enrichment, and purification of natural components present in complex plant matrices.

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Section: Resultsmentioning

confidence: 97%

Section: Adsorption Isothermsmentioning

confidence: 93%

Molecularly Imprinted Polymer Based on Carboxymethylcellulose/Graphene Oxide Composites for Selective Adsorption of Hydroxycamptothecin

Nie

Ahmad

et al. 2022

ACS Appl. Polym. Mater.

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“…As per the current research survey, it was found that majority of the researchers were trying to remove auramine dye using different types carbons Asfaram, Ghaedi, Hajati, et al, 2015;Goscianska et al, 2016;Qi et al, 2015) as well as other modified adsorbents (Inbaraj et al, 2006;Khatri et al, 2016;Pinto et al, 2020) which makes the adsorption process costly, although few of the researchers also used industrial waste (Mall et al, 2007) and agricultural by-product (Gaikwad & Kinldy, 2009) as adsorbents but there adsorption capacity was found to be low.…”

Section: Introductionmentioning

confidence: 80%

“…It can be seen in Figure 8 that the removal of Auramine dye was decreased (with an increase in adsorption capacity) from 99.99% to 48.05% and 99.99% to 83.61% in DPS and NPS, respectively. The decrease in removal of dye was due to saturation of available active sites for fixed adsorbent dose (Qi et al, 2015).…”

Section: Resultsmentioning

confidence: 99%

Removal of hazardous dye from aqueous media using low‐cost peanut (Arachis hypogaea) shells as adsorbents

Herbert

Kumar

Janardhan

2020

Water Environment Research

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In the present article, an attempt is made for simple, low-cost, and efficient removal of Auramine dye using peanut (Arachis hypogaea) shells as adsorbents. Two different forms of adsorbents distilled water washed peanut shells (DPS) and NaOH treated peanut shells (NPS) were used as adsorbents. Both the adsorbents were studied using BET, pH PZC , FTIR, SEM, TGA, and XRD characterization techniques. Adsorption parameters such as effect of contact time, pH, initial dye concentration, adsorbent dose, and temperature were also assessed. Isotherm analysis at optimum conditions showed Langmuir fitted better with a q m value of 96.15 mg/g for DPS and 294.12 mg/g for NPS; while in kinetic analysis, pseudo-second order was superior. Thermodynamics study stated that adsorption process was endothermic in nature. Overall outcomes establish that the two forms of peanut shells, DPS, and NPS were excellent in removal of Auramine dye and are low cost also as preparation cost of DPS and NPS is 68.73 INR and 106.19 INR per kg, respectively. © 2020 Water Environment Federation • Practitioner points • Removal of Auramine dye from aqueous media using different forms of peanut (Arachis hypogaea) shells as adsorbents is discussed. • q m (Langmuir) using DPS and NPS were found to be 96.15 and 294.12 mg/g, respectively. • Preparation cost of DPS was 68.73 INR per 1 kg, whereas for NPS it was 106.19 INR per 1 kg.

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“…The negative value of H indicates that the adsorption is an exothermic process, and the adsorption capacity is inversely proportional to temperature. The absolute value of H is lower than 40 kJ/mol, suggesting that adsorption of 2,4-D on SPME coatings are mainly physical adsorption [36]. The negative S indicates the disorder degree of the interface between the SPME coatings and 2,4-D solution decreases after adsorption.…”

Section: Adsorption Thermodynamicsmentioning

confidence: 96%

In-situ kinetic and thermodynamic study of 2,4-dichlorophenoxyacetic acid adsorption on molecularly imprinted polymer based solid-phase microextraction coatings

Yang

Muhammad

Yang

et al. 2020

Sensors and Actuators A: Physical

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Adsorption Kinetics and Thermodynamics of Auramine-O on Sugarcane Leaf-Based Activated Carbon

Cited by 11 publications

References 17 publications

Molecularly Imprinted Polymer Based on Carboxymethylcellulose/Graphene Oxide Composites for Selective Adsorption of Hydroxycamptothecin

Molecularly Imprinted Polymer Based on Carboxymethylcellulose/Graphene Oxide Composites for Selective Adsorption of Hydroxycamptothecin

Removal of hazardous dye from aqueous media using low‐cost peanut (Arachis hypogaea) shells as adsorbents

In-situ kinetic and thermodynamic study of 2,4-dichlorophenoxyacetic acid adsorption on molecularly imprinted polymer based solid-phase microextraction coatings

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