Coagulation/Flocculation Potential of Polyaluminium Chloride and Bentonite Clay Tested in the Removal of Methyl Red and Crystal Violet

Fosso‐Kankeu, Elvis; Webster, Charles Edwin; Ntwampe, I. O.; Waanders, F.B.

doi:10.1007/s13369-016-2244-x

Cited by 58 publications

(26 citation statements)

References 22 publications

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“…The pH affects the surface charge of PAC. It works effectively over a broader pH range of 5,0 to 8,0 (Fosso-Kankeu et al 2017). Therefore, the improvement of encapsulation at pH=7,5 is attributed to the increasing positive charges which enhance its neutralization ability.…”

Section: Optimizing the Phmentioning

confidence: 99%

Encapsulation of precipitated calcium carbonate fillers using carboxymethyl cellulose /polyaluminium chloride: preparation and its influence on mechanical and optical properties of paper

Mousavipazhouh

Azadfallah

Jouybari

2018

Maderas, Cienc. tecnol.

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Inorganic fillers are usually used in papermaking industry to reduce production costs and enhance paper optical properties. As an attempt to improve fillers application in papermaking, carboxymethyl cellulose (CMC) and poly aluminum chloride (PAC) were used to encapsulate precipitated calcium carbonate (PCC) filler and modify its surfaces. In the first step, the optimum conditions for filler treatment (i.e. pH, CMC and PAC contents) were obtained. Through the second step, different amounts of CMCencapsulated PCC were added to fiber suspension and some hand-sheets were made. Then, the effect of modified filler addition in different levels of 20, 25, and 35% on mechanical and optical properties of paper was investigated. The PAC dosage was found to be a critical factor for effective encapsulation of PCC fillers by carboxymethyl cellulose. When the dosages of CMC and PAC were 4% and 0.8% (based on the dry weight of PCC), respectively, filler modification caused to improve significantly the retention by more than twice. Strength properties of the hand-sheets fabricated with the CMC/ PAC-modified PCC were also found to be significantly better than those obtained with the unmodified PCC at similar levels of filler content. In addition, the brightness and opacity of the filled papers at 30% addition of CMC-modified fillers were strikingly enhanced to 88,45 and 77%, respectively. SEM observations of the filled papers also demonstrated that CMC-encapsulated filler particles were clustered and retained efficiently onto the fiber network. The present method for modification of PCC may provide an alternative approach to increase the filler amount in the paper structure by alleviating filler drawbacks.

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Section: Optimizing the Phmentioning

confidence: 99%

Encapsulation of precipitated calcium carbonate fillers using carboxymethyl cellulose /polyaluminium chloride: preparation and its influence on mechanical and optical properties of paper

Mousavipazhouh

Azadfallah

Jouybari

2018

Maderas, Cienc. tecnol.

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“…Under certain conditions, they could present a real menace to the environment in general and to water resources in particular through the establishment of the eutrophication process. During the last decades, various physicochemical techniques have been used for removal of dyes from industrial effluents such as coagulation/flocculation (Fosso-Kankeu et al 2017), ozonation (Smita et al 2017), electrochemical oxidation (Akrout et al 2015). Adsorption onto low-cost materials has pointed out as one of the most effective methods for dye removal especially for low concentrated effluents (Bharathi and Ramesh 2013).…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of chitosan extracted from shrimp shells waste and chitosan film: application for Eriochrome black T removal from aqueous solutions

2019

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In this paper, chitosan (CS) was successfully extracted from shrimp shells waste at two deacetylation temperatures (90 °C and 40 °C). The obtained chitosan at 90 °C showed better physicochemical properties compared to the one prepared at 40 °C with a degree of deacetylation DA = 88%, molecular weight M = 353 KDa, viscosity η = 0.469 dL/g and pKa = 6.49, and its structure was confirmed by Fourier transform infrared spectroscopy, X-ray diffraction and differential scanning calorimetry. The extracted CS was utilized as a film for the adsorption of Eriochrome black T (EBT) dye from aqueous solutions under various experimental conditions. Experimental results showed that the synthesized film exhibited excellent adsorption ability for EBT with an adsorption capacity of 413 mg/g at pH 4.66 for an initial dye concentration of 200 mg/L at 20 °C. The kinetics of adsorption were found to be of pseudo-second order with a high coefficient of determination (R 2 = 0.9999). Furthermore, the thermodynamic analysis revealed that the adsorption of EBT dye was an endothermic and spontaneous process. Freundlich model fitted well to the experimental data, the numerical value of n = 1.064 indicates that adsorption of EBT onto CS film is favorable. All these results confirm that chitosan-based films prepared from shrimp shells waste could be considered as promising materials for dye removal and as alternatives to expensive adsorbents.

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“…Various ways in overcoming the problem of dye waste both physically and chemically have been widely reported, such as chemical coagulation 4 , activated sludge 5 , biodegradation 6 , photocatalysis 7 , photocatalysis and magnetically separation 8 , oxidation 9 , membrane technologies of reverse osmosis and nanofiltration 10 .…”

Section: Introductionmentioning

confidence: 99%

The fast and of low-cost-adsorbent to the removal of cationic and anionic dye using chicken eggshell with its membrane

Hevira¹,

Rahmi²,

Zein³

et al. 2020

Mediterr.J.Chem.,

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The use of the chicken eggshell with its membrane as low-cost adsorbent had been done to the removal of synthetic dyes in aqueous solution. Adsorption method in the batch system was done to adsorb Methylene Blue and Indigo Carmine as the cationic and anionic dyes. Some parameters were studied such as pH, contact time, initial concentration of dyes and mass of ES+M to find the optimum adsorption. The functional group of ES+M like hydroxyl, amine, carboxyl and thiol were used to binding the dyes. The characteristics of ES+M were determined by FTIR and XRF to analyzed functional group and elements composition before and after adsorption. The adsorption capacity optimum of ES+M to adsorb Methylene Blue was 11.54 mg/g with % RE 92.34% in 30 minutes, and Indigo Carmine was 8.04 mg/g with % RE 64.34% in 15 minutes.

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Coagulation/Flocculation Potential of Polyaluminium Chloride and Bentonite Clay Tested in the Removal of Methyl Red and Crystal Violet

Cited by 58 publications

References 22 publications

Encapsulation of precipitated calcium carbonate fillers using carboxymethyl cellulose /polyaluminium chloride: preparation and its influence on mechanical and optical properties of paper

Encapsulation of precipitated calcium carbonate fillers using carboxymethyl cellulose /polyaluminium chloride: preparation and its influence on mechanical and optical properties of paper

Preparation and characterization of chitosan extracted from shrimp shells waste and chitosan film: application for Eriochrome black T removal from aqueous solutions

The fast and of low-cost-adsorbent to the removal of cationic and anionic dye using chicken eggshell with its membrane

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