Removal of C.I. Basic Yellow 2 from aqueous solution by low‐cost adsorbent: hardened paste of Portland cement

Rasoulifard, Mohammad Hossein; Esfahlani, F. Haddai; Mehrizadeh, Habib; Sehati, Negar

doi:10.1080/09593330903453251

Cited by 16 publications

(5 citation statements)

References 10 publications

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“…Figure 5a shows the effect of BCP dosage on the adsorption capability of Cr(VI). Increasing the adsorption efficiency by increasing adsorbent dosage was due to the availability of greater surface area and adsorption sites for the constant number of Cr(VI) ions (Rasoulifard et al 2010). Figure 5b indicates that by increasing the adsorbent dosage from 0.1 to 0.2 g, the value of q eq also decreases.…”

Section: The Effect Of Bcp Dosagementioning

confidence: 82%

Chromium(VI) adsorption from aqueous solution by prepared biochar from Onopordom Heteracanthom

Ghorbani-Khosrowshahi

Behnajady

2016

Int. J. Environ. Sci. Technol.

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In this research, the stems of Onopordom Heteracanthom which is a kind of weed were converted to biochar particles, and their characteristics were investigated. The morphology and purity of these particles were examined by SEM and EDX techniques, respectively. Specific surface area was obtained as 5.73 m 2 g -1 by BET method. The biochar particles obtained from Onopordom Heteracanthom were evaluated as an adsorbent to remove Cr(VI) from aqueous environments. The effect of some parameters such as initial concentration of Cr(VI), dosage of adsorbent, and pH were investigated on the adsorption capacity of Cr(VI) onto the adsorbent. The equilibrium data were analyzed by various isotherm models. The results revealed that in this process, the adsorption isotherm and kinetics have more conformity with Langmuir isotherm and pseudo-second-order kinetics, respectively. The multilinearity of the Weber and Morris adsorption kinetic model indicates that the intra-particle diffusion is not merely the rate-controlling step for the whole adsorption process.

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Section: The Effect Of Bcp Dosagementioning

confidence: 82%

Chromium(VI) adsorption from aqueous solution by prepared biochar from Onopordom Heteracanthom

Ghorbani-Khosrowshahi

Behnajady

2016

Int. J. Environ. Sci. Technol.

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“…The adsorption efficiency increased as the adsorbent dosage increased. This was likely the result of the increased surface area and adsorption sites for the constant number of PFF molecules (Ozacar and Sengil 2005;Rasoulifard et al 2010). Figure 4d indicates that the adsorption capacity of Fe/Ni nanoparticles decreased as the adsorbent dosage increased to above 8 g/l Fe/Ni.…”

Section: Effect Of Adsorbent Dosagementioning

confidence: 96%

Adsorption kinetics and thermodynamics of organophosphorus profenofos pesticide onto Fe/Ni bimetallic nanoparticles

Mansouriieh

Sohrabi

Khosravi

2016

Int. J. Environ. Sci. Technol.

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Bimetallic Fe/Ni nanoparticles were synthesized and used for the removal of profenofos organophosphorus pesticide from aqueous solution. These novel bimetallic nanoparticles (Fe/Ni) were characterized by scanning electron microscopy, energy-dispersive X-ray analysis spectroscopy, X-ray diffraction, and Fourier transform infrared spectroscopy. The effect of the parameters of initial pesticide concentration, pH of the solution, adsorbent dosage, temperature, and contact time on adsorption was investigated. The adsorbent exhibited high efficiency for profenofos adsorption, and equilibrium was achieved in 8 min. The Langmuir, Freundlich, and Temkin isotherm models were used to determine equilibrium. The Langmuir model showed the best fit with the experimental data (R 2 = 0.9988). Pseudo-first-order, pseudo-second-order, and intra-particle diffusion models were tested to determine absorption kinetics. The pseudo-second-order model provided the best correlation with the results (R 2 = 0.99936). The changes in the thermodynamic parameters of Gibb's free energy, enthalpy, and entropy of the adsorption process were also evaluated. Thermodynamic parameters indicate that profenofos adsorption using Fe/Ni nanoparticles is a spontaneous and endothermic process. The value of the activation energy (E a = 109.57 kJ/mol) confirms the nature of the chemisorption of profenofos onto Fe/Ni adsorbent.

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“…In recent years, more and more researchers applied non-conventional low-cost adsorbents to remove the various dyestuffs from an aqueous solution. Some of these are as follows: waste materials [18], fruit peels [19], Portland cement [20], Tripoli [21], date stones and palm-trees [22], pomegranate peel [23], fly ash [24,25], betonies [26], princess tree leaf [27], sepiolite [28], kaolin [29,30], etc.…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

Removal of acid turquoise blue 2G from aqueous solution by adsorbent derived from sludge and straw: kinetic, isotherm and thermodynamic study

Ren

Lai

Zhu

et al. 2016

Desalination and Water Treatment

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He (2014): Removal of acid turquoise blue 2G from aqueous solution by adsorbent derived from sludge and straw: kinetic, isotherm and thermodynamic study, Desalination and Water Treatment,The main objective of this work was to evaluate the adsorption capacity of acid turquoise 2G onto the adsorbent derived from sludge and straw. The sludge-straw adsorbent was prepared by pyrolysis in a dried state. The BET surface area of the adsorbent was 459.77 m 2 ·g −1 , micropore volume was 0.164 cm 3 ·g −1 , and average pore radius was 3.345 nm. The experimental data were analyzed using four adsorption kinetic models (pseudo-first-order, pseudo-second-order, intra-particle diffusion, and elovich) and related parameters were calculated. The results showed pseudo-second-order kinetic model was better fitted with experimental data than the others; the pseudo-second-order adsorption mechanism was predominant for the adsorption of acid turquoise 2G. Adsorption equilibrium was analyzed by Langmuir and Freundlich models. Langmuir isotherm was found to be more suitable than Freundlich isotherm for correlation of equilibrium data. The maximum amount of acid turquoise blue 2G adsorbed (q m ) was 1.215, 1.413, and 1.574 mmol·g −1 at 288, 298, and 308 K, respectively. Free energy of adsorption (ΔG 0 ), enthalpy change (ΔH 0 ), and entropy change (ΔS 0 ) were calculated, and the results indicated that the adsorption processes of acid turquoise blue 2G on the sludge-straw adsorbent were spontaneous (ΔG 0 < 0), endothermic in nature (ΔH 0 > 0), and accompanied by an increase in entropy change (ΔS 0 > 0).

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Removal of C.I. Basic Yellow 2 from aqueous solution by low‐cost adsorbent: hardened paste of Portland cement

Cited by 16 publications

References 10 publications

Chromium(VI) adsorption from aqueous solution by prepared biochar from Onopordom Heteracanthom

Chromium(VI) adsorption from aqueous solution by prepared biochar from Onopordom Heteracanthom

Adsorption kinetics and thermodynamics of organophosphorus profenofos pesticide onto Fe/Ni bimetallic nanoparticles

Removal of acid turquoise blue 2G from aqueous solution by adsorbent derived from sludge and straw: kinetic, isotherm and thermodynamic study

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