OPAC (orange peel activated carbon) derived from waste orange peel for the adsorption of chlorophenoxyacetic acid herbicides from water: Adsorption isotherm, kinetic modelling and thermodynamic studies

Pandiarajan, Aarthi; Kamaraj, Ramakrishnan; Vasudevan, Sudharshan; Vasudevan, Subramanyan

doi:10.1016/j.biortech.2018.04.005

Cited by 232 publications

(79 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In this study, we employed Langmuir isotherm parameters in order to make a relationship between the number of active sites available on adsorbent surface and concentrations of dyes molecules in the solution at equilibrium . The Freundlich isotherm is a widely used model for determining the adsorption intensity of adsorbate surfaces that have no uniform energy distribution . On the other hand, Dubinin‐Radushkevich (D‐R) model is mainly applied to describe the mechanism of adsorption on a uniform surface while considering the activation energy.…”

Section: Resultsmentioning

confidence: 99%

Optimizing adsorptive removal of malachite green and methyl orange dyes from simulated wastewater by Mn‐doped CuO‐Nanoparticles loaded on activated carbon using CCD‐RSM: Mechanism, regeneration, isotherm, kinetic, and thermodynamic studies

Sharifpour

Dil

Asfaram

et al. 2019

Applied Organom Chemis

108

View full text Add to dashboard Cite

In the present work, Mn‐doped CuO‐NPs‐AC was prepared by a simple method, characterized using various techniques such as FESEM, EDX, XRD, PSD, and pHpzc and finally used for the adsorption of malachite green (MG) and methyl orange (MO) in a number of single and binary solutions. A series of adsorption experiments were conducted to investigate and optimize the influence of various factors (such as different pH, concentration of MG and MO, adsorbent mass, and sonication time) on the simultaneous adsorption of MG and MO using response surface methodology. Under optimal conditions of pH 10, adsorbent dose of 0.02 g, MG concentration of 30 mg L−1, MO concentration of 30 mg L−1, and sonication time of 4.5 min at room temperature, the maximum predicted adsorption was observed to be 100.0%, for both MG and MO, showing that there is a favorable harmony between the experimental data and model predictions. The adsorption isotherm of MO and MG by Mn‐doped CuO‐NPs‐AC could be well clarified by the Langmuir model with maximum adsorption capacity of 320.69 mg g−1 and 290.11 mg g−1 in the single solution and 233.02 mg g−1 and 205.53 mg g−1 in the binary solution by 0.005 g of adsorbent mass for MG and MO, respectively. Kinetic studies also revealed that both MG and MO adsorption were better defined by the pseudo‐second order model for both solutions. In addition, the thermodynamic constant studies disclosed that the adsorption of MG and MO was likely to be influenced by a physisorption mechanism. Eventually, the reusability of the Mn‐doped CuO‐NPs‐AC after six times showed a reduction in the adsorption percentage of MG and MO.

show abstract

Section: Resultsmentioning

confidence: 99%

Optimizing adsorptive removal of malachite green and methyl orange dyes from simulated wastewater by Mn‐doped CuO‐Nanoparticles loaded on activated carbon using CCD‐RSM: Mechanism, regeneration, isotherm, kinetic, and thermodynamic studies

Sharifpour

Dil

Asfaram

et al. 2019

Applied Organom Chemis

108

View full text Add to dashboard Cite

show abstract

“…However, if the errors in q e predicted and q e observed is more, modified Pseudo-first order kinetic model will Pseudo-second order kinetic model is given in [6,29,31,32,33]…”

Section: Biosorption Kineticsmentioning

confidence: 99%

Biosorption - a case study of hexavalent chromium removal with raw pomegranate peel

Salam¹,

Anantharaman²

2019

DWT

View full text Add to dashboard Cite

Biosorptive removal of heavy metals from water is an eco-friendly green technology. In this study, raw pomegranate (Punicagranatum L.) peel (RPP), without any modification or activation, was used as biosorbent for the removal of chromium (Cr(VI)). The influence of operating parameters such as pH, contact time, temperature and concentration of Cr(VI) were studied in batch mode. A maximum removal of 100% was achieved for a Cr(VI) solution of concentration 20 mg/L at an optimum pH and temperature of 2 and 313 K respectively in 3 min. Among the isotherms tested, Langmuir adsorption isotherm has good correlation with experimental data. A maximum Cr(VI) biosorption capacity of 370.4 mg/g was observed at 313K under equilibrium conditions. RPP is also effective in the removal of Cr(VI) at higher concentrations. Among the kinetic models, pseudo-second order kinetic model fits the data well. The thermodynamic study reveals that the endothermic biosorption taking place on RPP is physico-chemical in nature. The biosorption mechanism of RPP with Cr(VI) indicates that intra-particle diffusion is not the only rate limiting step and film diffusion also plays a major role in biosorption.

show abstract

“…However, in case of E<8 kJ/mol, that is meant that physisorption adsorption progression considering and driven via the pore filling mechanism. The magnitude of E value greater than 16 kJ/mol particle diffusion mechanism is considering being occurred (Pandiarajan et al, 2018). Figure 8, demonstrate straight line with coefficient of determination (R 2 ) of 0.9.…”

Section: Adsorption Isothermsmentioning

confidence: 76%

“…Figure 8, demonstrate straight line with coefficient of determination (R 2 ) of 0.9. The value of qD-R to be 0.21 (mg g -1 ) and E value was 2.35 kJ/mol which may suggest that the adsorption process was involved physical adsorption, (Pandiarajan et al, 2018;Şahan and Öztürk, 2013). The results are given in Table 5, showed various constant values from isotherm models which indicated that Langmuir isotherm is more fitted for As (V) adsorption onto MPP-AC.…”

Section: Adsorption Isothermsmentioning

confidence: 89%

“…k1 (min -1 ) is pseudo-first order rate constant for adsorption process. qmax and k1were calculated from the intercept and slope respectively, by plotting of ln(qe-qt) vs. t time (min) (Chaudhry et al, 2017;Pandiarajan et al, 2018). The values of qe and k1 were determined to be 0.18 (mg g -1 ) and 0.032 (min -1 ), respectively as shown in Figure 9.…”

Section: Kinetic Study Of Adsorptionmentioning

confidence: 99%

See 1 more Smart Citation

Optimization of Arsenic Adsorption onto Cativated Carbon Dreived from Potato Peel Using Response Surfase Methodology

Haji

Mohammed

2019

SJUOZ

View full text Add to dashboard Cite

The present study was designed to optimizing the adsorption of As (V) onto potato peel derived activated carbon (MPP-AC) by employing response surface method and central composite design. Adsorbent of cheap and locally available potato residue was produced based on chemical activation with H3PO4 subsequently carbonization to produce the porous activated carbon. The individual and interactive effects of five variables including initial arsenic concentration, temperature, time, dosage amount and pH of the medium were investigated. Based on the statistic analysis (ANOVA), the quadratic model was developed associating the adsorption capacity (qe). The optimum conditions were obtained of 9.98 mg L-1 of initial As (V) concentration, 28 °C of temperature, 39.7 min of time, 0.97 g of adsorbent dose and 7.3 of pH. The maximum adsorption capacity was 0.27 mg g-1 and 76.5% removal efficiency. The equilibrium isotherms and kinetic studies for estimating the mechanism of process demonstrated a good fit to Langmuir model and the pseudo-second order, respectively. The results of this study showed that the feasibility of central composite design for control adsorption process and indicated the use of activated carbon of potato residue have important implications for As (V) removal.

show abstract

OPAC (orange peel activated carbon) derived from waste orange peel for the adsorption of chlorophenoxyacetic acid herbicides from water: Adsorption isotherm, kinetic modelling and thermodynamic studies

Cited by 232 publications

References 40 publications

Optimizing adsorptive removal of malachite green and methyl orange dyes from simulated wastewater by Mn‐doped CuO‐Nanoparticles loaded on activated carbon using CCD‐RSM: Mechanism, regeneration, isotherm, kinetic, and thermodynamic studies

Optimizing adsorptive removal of malachite green and methyl orange dyes from simulated wastewater by Mn‐doped CuO‐Nanoparticles loaded on activated carbon using CCD‐RSM: Mechanism, regeneration, isotherm, kinetic, and thermodynamic studies

Biosorption - a case study of hexavalent chromium removal with raw pomegranate peel

Optimization of Arsenic Adsorption onto Cativated Carbon Dreived from Potato Peel Using Response Surfase Methodology

Contact Info

Product

Resources

About