Reusable bentonite clay: modelling and optimization of hazardous lead and<i>p</i>-nitrophenol adsorption using a response surface methodology approach

Zbair, Mohamed; Anfar, Zakaria; Ahsaine, Hassan Ait

doi:10.1039/c9ra00079h

Cited by 41 publications

(9 citation statements)

References 82 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The amount of adsorptive removed (R, %) and weight retained by the material at time t (q t , mg/g) were calculated by eqs 1 and 2, respectively. 57 94 montmorillonite−illite clay 58 52 NC (Nigeria) 59 34 acid-activated clay 59 35 thermally activated clay 59 32 NC (India) 60 25 bentonite 61 19 kaolinite−multiwalled carbon nanotube nanocomposite 62 10 acid-activated clay 63 10 nano illite/smectite clay 64 2 where C t (mg/L) is the concentration of the adsorptive at time t, V (L) is the volume of the adsorptive solution, and w (g) is the weight of the material.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

Removal of Hazardous Contaminants from Water by Natural and Zwitterionic Surfactant-modified Clay

2020

View full text Add to dashboard Cite

In this study, natural clay (NC) was collected from Saudi Arabia and modified by cocamidopropyl betaine (CAPB) at different conditions (CAPB concentration, reaction time, and reaction temperature). NC and modified clay (CAPB-NC) were characterized using X-ray diffraction, thermogravimetric analysis, Fourier transform infrared spectroscopy, field-emission scanning electron microscopy, and N2 adsorption at 77 K. The adsorption efficiency of NC and CAPB-NC toward Pb2+ and reactive yellow 160 dye (RY160) was evaluated. The adsorption process was optimized in terms of solution initial pH and adsorbent dosage. Finally, the adsorption kinetics and isotherms were studied. The results indicated that NC consists of agglomerated nonporous particles composed of quartz and kaolinite. CAPB modification reduced the specific surface area and introduced new functional groups by adsorbing on the NC surface. The concentration of CAPB affects the adsorption of RY160 tremendously; the optimum concentration was 2 times the cation exchange capacity of NC. The equilibrium adsorption capacity of CAPB-NC toward RY160 was about 6 times that of NC and was similar for Pb2+. The adsorption process followed the pseudo-second-order kinetics for both adsorptive. RY160 adsorption on CAPB-NC occurs via multilayer formation while Pb2+ adsorption on NC occurs via monolayer formation..

show abstract

Section: ■ Materials and Methodsmentioning

confidence: 99%

Removal of Hazardous Contaminants from Water by Natural and Zwitterionic Surfactant-modified Clay

2020

View full text Add to dashboard Cite

show abstract

“…To envisage the regeneration of PCLD@NaOH, ethanol was used to desorb aspirin and ketoprofen from PCLD@NaOH. 85,86 The reusability of the PCLD@NaOH was determined using 5 cycles of adsorption-regeneration. A sample of 20 mg of PCLD@NaOH was shaken with 100 mL solution of aspirin and ketoprofen (150 mg L À1 ) for 2 h at room temperature.…”

Section: Regeneration Of Adsorbentmentioning

confidence: 99%

Selected pharmaceuticals removal using algae derived porous carbon: experimental, modeling and DFT theoretical insights

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…Among the techniques used for environmental, adsorption using solid adsorbents has gained particular attention among the worldwide researchers as being highly efficient, of low operating cost with a simple operation process and capable for large scale pollutants removal . Commercial activated carbon, clays and zeolites are the most important adsorbents that have been used so far . However, the use of commercially synthesized adsorbents for the adsorption process has become limited and restricted since they exhibit some drawbacks like high production costs, poor regeneration ability.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Porous Carbon@ZnO‐NPs for Organic Compounds Removal: Classical Adsorption Versus Ultrasound Assisted Adsorption

et al. 2019

Self Cite

View full text Add to dashboard Cite

In this paper, the synthesis and characterization of porous carbon (PC) and porous carbon loaded ZnO nanoparticles (PC@ZnO) were investigated. The removal efficiency of Methylene Blue (MB) under ultrasound waves (UAA) and without ultrasound waves (SA) was studied considering the adsorbents dose, contact time, solution pH, temperature and initial dye concentration. Ultrasound irradiation have a positive effect on the removal efficiency of MB whereas ZnO nanoparticles incorporate in the surface of PC improve the regeneration efficiency of PC. PC@ZnO NPs shows high performance of MB removal using UAA, which was used for simultaneous removal of Crystal Violet (CV) and Congo Red (CR). The ultrasonic adsorption of CV/CR on PC@ZnO was found to be dependent on different parameters such as contact time, solution pH and initial dye concentration. The experimental results were found to follow the pseudo-second-order and Langmuir models. The adsorbed amount was found to be 64 mg g À 1 (for CR) and 109 mg g À 1 (for CV). Further, the effects of various parameters such as contact time, pH, initial dye concentration, and CV:CR ratio, were studied using central composite design coupled with response surface methodology. The data showed that the PC@ZnO has strong selective adsorption of CV dye in comparison to CR, and optimum conditions were found to be natural pH, 11.19 mg, (55:45%) of CV:CR ratio, 25 min and 30 mg L À 1 at adsorption temperature T = 25°C � 1. In these conditions, both dyes (CV and CR) are easily regenerated using HCl (0.1 M).

show abstract

Reusable bentonite clay: modelling and optimization of hazardous lead andp-nitrophenol adsorption using a response surface methodology approach

Abstract: In this work, bentonite clay (BC) calcined at 500 °C was used as an adsorbent (BC-500) for the adsorption of Pb2+ and p-nitrophenol.

Cited by 41 publications

References 82 publications

Removal of Hazardous Contaminants from Water by Natural and Zwitterionic Surfactant-modified Clay

Removal of Hazardous Contaminants from Water by Natural and Zwitterionic Surfactant-modified Clay

Selected pharmaceuticals removal using algae derived porous carbon: experimental, modeling and DFT theoretical insights

Preparation and Characterization of Porous Carbon@ZnO‐NPs for Organic Compounds Removal: Classical Adsorption Versus Ultrasound Assisted Adsorption

Contact Info

Product

Resources

About