Ultrasonication-Assisted Sorption of Cadmium from Aqueous Phase by Wheat Bran

Nouri, Loubna; Hamdaoui, Oualid

doi:10.1021/jp0721393

Cited by 49 publications

(25 citation statements)

References 28 publications

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“…The mass transfer coefficient was estimated using Eqs. and :

V (\frac{d C}{d t}) = - k_{normals} A (C - C_{normals})

where C s is the COD of the pollutant at the surface (mg/L), C is the COD of the pollutant in the bulk fluid (mg/L), A is the surface area for the external mass transfer (m 2 ), k s is the liquid film mass transfer coefficient (m/min), t is the time (min), and V is the volume of the effluent taken for investigation (L). Upon integration of Eq.…”

Section: Resultsmentioning

confidence: 99%

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Treatment of Pharmaceutical Effluent by Sono‐Fenton‐Sorption

Nachiappan

Muthukumar

2014

CLEAN Soil Air Water

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This study presents the treatment of a high strength pharmaceutical wastewater by sono‐Fenton‐sorption (SFS). Better results were observed with SFS compared to individual processes and the maximum chemical oxygen demand reduction observed after 180 min of treatment with SFS, sono‐Fenton, and sono‐sorption was 71.9, 48.4, and 43.75%, respectively. The effect of parameters such as initial concentration, dosage of Fenton's reagent, sorbent dosage, and pattern of addition of iron on the performance of SFS was analyzed. The sonosorption and SFS were found to fit well with Langmuir–Hinshelwood kinetics. Fourier transformed IR studies of effluent and sorbent before and after treatment confirmed the oxidative degradation of pharmaceutical effluent. Toxicity of the effluent was considerably reduced after the treatment and the electrical energy consumption was significantly reduced, when sonolysis was coupled with sorption and Fenton's process (SFS).

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“…The mass transfer coefficient was estimated using Eqs. and :

V (\frac{d C}{d t}) = - k_{normals} A (C - C_{normals})

Section: Resultsmentioning

confidence: 99%

“…These actions enhanced pore diffusion and mass transfer across the boundary layer [22]. In addition, acoustic streaming caused due to ultrasound waves improved the mass transfer [23]. Further, the reduction in sorbent size was observed due to ultrasound irradiation [5] and this may be due to the breakage of solid particles.…”

Section: Ss and Sf Processesmentioning

confidence: 99%

Treatment of Pharmaceutical Effluent by Sono‐Fenton‐Sorption

Nachiappan

Muthukumar

2014

CLEAN Soil Air Water

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“…Nouri and Hamdaoui found the maximum removal of cadmium appeared at pH 5.0 by using wheat bran [15],while the maximum removal of copper appeared at pH 5.0 by using wheat bran its found by Wang et al [16].…”

Section: Influence Of Phmentioning

confidence: 90%

Comparison between Performance of Okra Waste and Wheat Bran for Removing some Heavy Metals from Wastewater

Esgair

2018

NJES

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In the present work, the agricultural wastes which are wheat bran and raw okra waste used as adsorbent material for adsorption of cadmium and copper ions from wastewater .The effect of adsorption variable which include initial pH of solution , agitation speed, agitation time, initial concentration of cadmium and copper ions, and amount of adsorbent material were investigated in a batch process in order to obtain the maximum ions removal from wastewater .The results obtained from experimental investigation show that the percentage removal of metal ions increases with increasing pH and agitation speed until a maximize value after that it decreased with increasing pH and agitation speed. Also increases with increasing amount of adsorbent material and agitation time until a maximize value then reach a constant value approximately , and decreasing with increasing metal ions concentration .The maximum removal percent of cadmium and copper ions were 85.8% and 52.7 % respectively which obtained at pH equal 5.0, agitation speed 150 revolution per minute, agitation time 105 minute , metal ion concentration 40mg /L ,and adsorbent amount 1.5gm when using wheat bran as adsorbent material ,while obtained the maximum removal percent of cadmium and copper ions were 81.7% and 47.8 % which obtained at pH equal 6.0, and pH equal 5.0 respectively , agitation speed 150 revolution per minute, agitation time 90 minute ,metal ion concentration 40 mg /L ,and adsorbent amount 1.5gm when using okra waste as adsorbent material. From above result the wheat bran and okra waste was a best adsorbent material for removal cadmium and copper ions from wastewater but wheat bran slightly more effective than okra waste.

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“…The mass transfer coefficient through liquid film can be determined using the following equation [42]:…”

Section: Adsorption Mechanismmentioning

confidence: 99%