Ultrasound enhanced removal of lead from wastewater by hazelnut shell: an experimental design methodology

Ahmed, S. Bdaiwi; Stoica-Guzun, Anicuţa; Kamar, Firas Hashim; Dobre, Tănase; Gudovan, Dragoş; Busuioc, Cristina; Jipa, Iuliana

doi:10.1007/s13762-018-1782-z

Cited by 8 publications

(7 citation statements)

References 30 publications

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“…As previously described by authors 17 , HS procured from Iraq local market, were thoroughly washed with distilled water, dried, grinded using a knife mill and sieved. In the experiments different sieved fractions of the grinded material were used, in accordance with the experimental plan (0.25-0.5 mm, 0.5-0.75 mm, 0.75-1 mm, 1.0-1.25 mm or 1.25-1.5 mm respectively).…”

Section: Methodsmentioning

confidence: 99%

Full factorial design and dynamic modelling of silent and ultrasound-assisted lead and cadmium removal by porous biosorbent

Ahmed

Dobre

Kamar

et al. 2022

Sci Rep

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Present work aimed to analyse single and competitive lead and cadmium batch adsorption, using experimental studies and mathematical modelling. The experiments were conducted in silent and ultrasound-assisted systems, in aqueous environment, using grinded hazelnut shells as porous biosorbent. The influence of process factors (pH, adsorbent concentration, adsorbent particle size, and initial species concentration in liquid phase) on species removal efficiency was evaluated when process equilibrium was attained. The statistical study, following a 24 factorial experimental design, allowed the development of a model to predict variables influence. Based on the obtained results a deeper analysis of the separation efficiency, depending on process factors, was conducted. The dynamic study was performed based on experimentally obtained removal rates, modelled considering species diffusion, with reversible kinetics of sorption inside solid particles. Hence, the dynamics of removal efficiency was determined for several representative experiments. The equilibrium isotherms data, best fitted by an appropriate Langmuir model, were used in the dynamic model to reduce the number of model parameters which normally require experimental identification.

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Section: Methodsmentioning

confidence: 99%

Full factorial design and dynamic modelling of silent and ultrasound-assisted lead and cadmium removal by porous biosorbent

Ahmed

Dobre

Kamar

et al. 2022

Sci Rep

Self Cite

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“…Native and US-treated HS, as lignocellulosic material suitable to be used as biosorbent, was previously investigated and characterised 14 . Brie y, Scanning Electron Microscopy revealed that US determines mechanical ruptures with formation of pores and smother surfaces, while X-ray diffraction showed no modi cation on cellulose crystalline structure under US treatment.…”

Section: Resultsmentioning

confidence: 99%

“…Fourier Transform Infrared spectra emphasised the complex material composition, with many functional groups interacting with metal ions. Thus, the sorption on this vegetal structure was proved as the result of a combination of mechanisms: physical adsorption, ion exchange, electrostatic interactions and formation of complexes 14,15,22,23 . Furthermore, ultrasounds signi cantly intensify this process due to acoustic cavitations' development inside and outside of sorbent particle [24][25][26] .…”

Section: Resultsmentioning

confidence: 99%

“…As previously described by authors 14 , HS procured from Iraq local market, were thoroughly washed with distilled water, dried, grinded using a knife mill and sieved.…”

Section: Methodsmentioning

confidence: 99%

“…The contact time was signi cantly shorter, around 6 min. The above parameters were considered based on literature and previous practice 14,15 .…”

Section: Batch Adsorption Experimentsmentioning

confidence: 99%

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Modelling of Lead and Cadmium Removal by Porous Biosorbent in Silent and Ultrasound-assisted Systems

Ahmed

Dobre

Kamar

et al. 2022

Preprint

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Present work aimed to analyse experimentally, statistically and using mathematical modelling the behaviour of single and competitive lead and cadmium batch adsorption. The process was conducted in silent, and ultrasound (US)-assisted systems, in aqueous environment, on grinded hazelnut shells (HS) as sustainable and cost-effective porous biosorbent. The dynamic study was based on experimentally obtained removal rates, modelled considering species diffusion with reversible kinetics of sorption inside solid particles. The influence of process factors (pH, adsorbent concentration, adsorbent particle size, and initial species concentration in liquid phase) on species removal efficiency was studied when process equilibrium was attained. The study, following a 24 factorial experimental design, allowed the development of a statistical model to predict variables influences. Based on the obtained results a deeper analysis of separation efficiency depending on process factors was conducted. Hence, the dynamics of removal efficiency was determined for several representative experiments. The equilibrium isotherms data, best fitted by an appropriate Langmuir model, were used in the dynamic model to reduce the number of model parameters which normally require experimental identification.

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Removal of Heavy Metals and Dyes from Wastewaters by Raw and Activated Carbon Hazelnut Shells

Turan

2022

Topics in Applied Physics

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Ultrasound enhanced removal of lead from wastewater by hazelnut shell: an experimental design methodology

Cited by 8 publications

References 30 publications

Full factorial design and dynamic modelling of silent and ultrasound-assisted lead and cadmium removal by porous biosorbent

Full factorial design and dynamic modelling of silent and ultrasound-assisted lead and cadmium removal by porous biosorbent

Modelling of Lead and Cadmium Removal by Porous Biosorbent in Silent and Ultrasound-assisted Systems

Removal of Heavy Metals and Dyes from Wastewaters by Raw and Activated Carbon Hazelnut Shells

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