Adsorptive removal of aniline from aqueous solutions by Pistacia atlantica (Baneh) shells: isotherm and kinetic studies

Ahmadi, Shahin; Mostafapour, Ferdos Kord

doi:10.18801/jstei.050117.35

Cited by 26 publications

(17 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It can be seen in Figure 7 that the other interactions apart from the interaction between time and dosage are not significant towards the removal of AB92. The pH is a very significant factor that affects an adsorption process [51][52][53]. The effect of pH on AB92 adsorption is linked to the solution pH and the functional groups exhibited by the Nd 2 O 3 nanoparticles which will consecutively influence its surface charge [49].…”

Section: Model Fitting-statistical Analysis-adsorption Optimizationmentioning

confidence: 99%

Acid Dye Removal from Aqueous Solution by Using Neodymium(III) Oxide Nanoadsorbents

et al. 2020

View full text Add to dashboard Cite

In the current work, neodymium oxide (Nd2O3) nanoparticles were synthesized and characterized by means of X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). The major aim/investigation of this research was to fit/model and optimize the removal of Acid Blue 92 (AB92) dye from synthetic effluents (aqueous solutions) using the adsorption process based on neodymium oxide (Nd2O3) nanoparticles. To optimize the adsorption conditions, central composite design (CCD) based on response surface methodology (RSM) was applied. The effects of pH (3–9), adsorbent dosage (0.1–1 g/L), initial concentration of AB92 (100–300 mg/L), and contact time (10–100 min) on the adsorption process were investigated. Apart from equilibrium and kinetic experiments, thermodynamic evaluation of the adsorption process was also undertaken. The adsorption process was found to have the best fitting to Langmuir isotherm model and pseudo-second-order kinetic equation. Also, the process was found to be spontaneous and favorable with increased temperature. The optimal conditions found were: pH = 3.15, AB92 concentration equal to 138.5 mg/L, dosage of nanoadsorbent equal to 0.83 g/L, and 50 min as contact time, which resulted in 90.70% AB92 removal. High values for the coefficient of determination, R2 (0.9596) and adjusted R2 (0.9220) indicated that the removal of AB92 dye using adsorption can be explained and modeled by RSM. The Fisher’s F-value (25.4683) denotes that the developed model was significant for AB92 adsorption at a 95% confidence level.

show abstract

Section: Model Fitting-statistical Analysis-adsorption Optimizationmentioning

confidence: 99%

Acid Dye Removal from Aqueous Solution by Using Neodymium(III) Oxide Nanoadsorbents

et al. 2020

View full text Add to dashboard Cite

show abstract

“…where q e (µg/g) is the amount of fluoride adsorbed per specific amount of adsorbent, C e is equilibrium concentration of the arsenic solution (µg/L), K L (L/µg) is Langmuir constant and q m (µg/g) is the maximum amount of arsenic required to form a monolayer. The Langmuir equation can be rearranged to linear form for the convenience of plotting and determining K L and q m with drawing the curve 1/q e versus 1/C e (Ahmadi and Kord Mostafapour 2017b;Azarpira et al2016):…”

Section: Isotherm Studymentioning

confidence: 99%

Adsorption of arsenic (V) from aqueous solution using modified saxaul ash: isotherm and thermodynamic study

et al. 2019

View full text Add to dashboard Cite

Recently, arsenic-contaminated water has become a big concern. Therefore, the present study aimed to absorb arsenic from the aqueous solution using modified saxaul tree ash. Arsenic adsorption process was performed in vitro by investigating the effect of various parameters such as pH, contact time, arsenic concentrations, temperature and adsorbent dosage on the adsorption efficiency. Isotherms, kinetics and thermodynamic studies were also conducted to better understand the process of adsorption. Maximum level of arsenic adsorption was obtained at a pH of 7, adsorbent dosage of 1.5 g/L, contact time of 60 min, initial arsenic concentration of 250 µg/l and temperature of 323 K. The amount of adsorbed arsenic was increased with increasing initial concentration of arsenic and temperature. Freundlich adsorption isotherm clearly described the arsenic adsorption by modified saxaul ash. Based on the results obtained, it could be concluded that the modified saxaul ash can efficiently remove arsenic from its aqueous solutions.

show abstract

“…The residual concentrations were measured using UV-visible spectrophotometer (Shimadzu Model: CE-1021). The amount of PC-G adsorbed on MgO nanoparticles, q e , was obtained as follows : Also, the removal efficiency, R (%), was calculated based on the following formula Ahmadi and Kord Mostafapour 2017d):…”

Section: Batch Adsorption Techniquementioning

confidence: 99%

“…This is the cause for the increase in adsorption of PC-G (Samadi et al 2013;. The reason for the decreasing removal efficiency by enhancement of antibiotic density is the saturation of active places of adsorption (Ahmadi and Kord Mostafapour 2017d;Rahdar et al 2019b).…”

Section: The Effect Of Adsorbent Dosagementioning

confidence: 99%

Error analysis of adsorption isotherm models for penicillin G onto magnesium oxide nanoparticles

Rahdar

Khodadadi

et al. 2019

Appl Water Sci

View full text Add to dashboard Cite

The adsorption of penicillin G (PC-G) from aqueous solution by magnesium oxide (MgO) nanoparticles has been investigated. This experimental study was conducted in a laboratory scale. The effects of various operating parameters such as pH (3-11), the dosage of MgO nanoparticles (0.3-1.5 g/L), contact time (20-150 min), and concentration of PC-G (50-200 mg/L) were studied. The results showed that under optimal conditions of concentration of 50 mg/L, pH 3, MgO nanoparticles dosage of 1.5 g/L and contact time of 60 min, the maximum adsorption capacity (q m ) of PC-G adsorption on MgO nanoparticles obtained was 25.66 mg/g. The process of penicillin G adsorption on MgO nanoparticles was found to depend on Langmuir (II) and Langmuir (III) adsorption isotherm models. It could be concluded that the MgO nanoparticles can be used for PC-G removal from its aqueous solution.

show abstract

Adsorptive removal of aniline from aqueous solutions by Pistacia atlantica (Baneh) shells: isotherm and kinetic studies

Abstract: Article info.

Cited by 26 publications

References 23 publications

Acid Dye Removal from Aqueous Solution by Using Neodymium(III) Oxide Nanoadsorbents

Acid Dye Removal from Aqueous Solution by Using Neodymium(III) Oxide Nanoadsorbents

Adsorption of arsenic (V) from aqueous solution using modified saxaul ash: isotherm and thermodynamic study

Error analysis of adsorption isotherm models for penicillin G onto magnesium oxide nanoparticles

Contact Info

Product

Resources

About