Eosin Removal Properties of Organo-local Clay from Aqueous Solution

Al-Faze, Rawan; Kooli, Fethi

doi:10.13005/ojc/300237

Cited by 11 publications

(12 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As the C16TMA content increased, the removal amount was also improved due to the complete covering of the negative charge on PG clay by the surfactant, which means the electrical repulsion overcame [ 66 , 67 , 68 ]. Similar data were achieved using local clay mineral [ 32 ] and other silicate layered materials [ 25 , 63 ].…”

Section: Resultssupporting

confidence: 67%

“…Figure 13 indicated that low removal capacities were obtained for low loading of the C16TMABr amount because of the remaining negative electrical charge on the PG clay surface [ 32 ]. As the C16TMA content increased, the removal amount was also improved due to the complete covering of the negative charge on PG clay by the surfactant, which means the electrical repulsion overcame [ 66 , 67 , 68 ].…”

Section: Resultsmentioning

confidence: 99%

“…The removal of eosin was carried out using batch mode experiments, as reported previously [ 32 ]. A fixed amount of OC (0.1 g) was added to 10 mL of known concentrations in a series of 12 mL closed tubes.…”

Section: Experimental Partmentioning

confidence: 99%

See 2 more Smart Citations

Removal Properties of Anionic Dye Eosin by Cetyltrimethylammonium Organo-Clays: The Effect of Counter-Ions and Regeneration Studies

et al. 2018

Self Cite

View full text Add to dashboard Cite

The organo-clays (OCs) were prepared by a cation exchange reaction between surfactant (cetyltrimethylammonium, C16TMA) from different counterions (Bromide, Chloride, and Hydroxide). The effect of the counterions was investigated on the physico-chemical properties of the prepared organo-clays. The highest uptake of organic cations (1.60 mmol/g) was achieved using cetyl trimethylammonium bromide solution and the lowest value (0.93 mmol/g) was obtained after modification with cetyl trimethylammonium hydroxide solution starting from the same initial ratio of mmol/g of clay greater than 2.40. The arrangement of C16TMA cations within the interlayer space was assumed to be perpendicular with a tilt angle of 32° to the plane of clay sheets instead of being parallel to the clay surface using C16TMAOH solution at the same ratio. Different techniques were used to characterize these materials. The thermal stability of these organ-clays was investigated using an in-situ X-ray diffraction (XRD) technique. The decomposition of the surfactant moiety occurred at temperatures higher than 215 °C and was accompanied with a shrinkage of the basal spacing value to 1.42 nm. These materials were applied in the removal of an acid dye “eosin.” The removed amount of eosin depended on the initial concentrations and the content of surfactants in the organo-clays. The removal of eosin was found to be an endothermic process. The maximum amount of 90 mg/g was achieved. The preheated treatment temperature of two selected OCs did affect the removal properties of eosin. A progressive reduction was observed at temperatures higher than 200 °C. The regeneration of spent OCs was studied and acceptable removal efficiency was maintained after 4 to 6 cycles depending on the used initial concentrations.

show abstract

Section: Resultssupporting

confidence: 67%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Removal Properties of Anionic Dye Eosin by Cetyltrimethylammonium Organo-Clays: The Effect of Counter-Ions and Regeneration Studies

et al. 2018

Self Cite

View full text Add to dashboard Cite

show abstract

“…Similar results were observed in the case of organo-kenyaites and organo-clays for the removal of eosin or acidic dyes [33,53,55] The modification of the silicate surface by organic cations and mainly long ones, such as C16TMAs, rendered the magadiite an organophilic material similar to organo-clays [57] The negatively charged surface of the silicate may adsorb the cationic surfactants were exchanged with the exchangeable interlayer cations of the magadiite (Na + ), and the hydrophobic head of the cationic surfactants was arranged outward [56]. The C16TMA + cations generated an organophilic phase partition in the interlayer spacing, and the partition occurred through the interaction of the dye with the cationic C16TMA + cations [58,59,60].…”

Section: Effect Of Organic Contentsupporting

confidence: 77%

“…The non-modified "Na-magadiite" removed an amount of eosin, approximately 4 mg/g (Figure 8), that was lower than those reported for other silicate materials such kenyaite or clay minerals [33,53]. These materials have a consistent negative charge and a poor affinity for negatively charged anionic dyes [54].…”

Section: Effect Of Organic Contentmentioning

confidence: 87%

Application of Organo-Magadiites for the Removal of Eosin Dye from Aqueous Solutions: Thermal Treatment and Regeneration

Kooli¹,

Liu²,

Abouddi³

et al. 2018

Preprint

Self Cite

View full text Add to dashboard Cite

Na-magadiite exchanged with cetyl-trimethylammonium cations provided organophilic silicate materials that allowed the effective removal of the acidic dye "eosin". The organic cations were intercalated into the interlayer spacing of the layered silicate via an exchange reaction between the organic cations from their bromide salt and the solid Na-magadiite at room temperature. Different techniques were used to characterize the effect of the initial concentration of the surfactant on the structure of the organo-magadiites. The C, H, N analysis indicated that a maximum of 2 organic cations of 1.03 mmol/g was achieved at initial concentrations higher than 0.25 mmol/g and was accompanied by an expansion of the basal spacing of 3.15 nm, with a tilted angle of 64.5° to the silicate layers. The conformation of the organic surfactants was probed using solid-state 13 C, finding mainly the trans conformation similar to that of the starting cetyl trimethylammonium bromide salt (C16TMABr).Thermal gravimetric analysis was carried out to study the thermal stability of the resulting organo-magadiites. The intercalated surfactants started to decompose at 200 °C, with a mass loss percentage of 8 % to 25 %, depending on the initial loading of the surfactant, and was accompanied by a decrease of the basal spacing from 3.20 nm to 2.51 nm, as deduced from the in situ X-ray diffraction studies. At temperatures below 220 °C, an expansion of the basal spacing from 3.15 to 3.35 nm occurred.These materials were used as a removal agent for the anionic dye "eosin". The maximum amount of the dye removed was related to the organic cation content and to the initial concentration of eosin, with an improvement from 2.5 mg/g to 98 mg/g. This value decreased when the organo-magadiite was preheated at temperatures above 200 °C. The regeneration tests indicated that an 85 % removal efficiency was maintained after 6 cycles of use for the organo-magadiites.

show abstract

Clays and Clay Polymer Composites for Electrokinetic Remediation of Soil

Janeni

Adassooriya

2021

Electrokinetic Remediation for Environmental Security and Sustainability

View full text Add to dashboard Cite

Eosin Removal Properties of Organo-local Clay from Aqueous Solution

Cited by 11 publications

References 12 publications

Removal Properties of Anionic Dye Eosin by Cetyltrimethylammonium Organo-Clays: The Effect of Counter-Ions and Regeneration Studies

Removal Properties of Anionic Dye Eosin by Cetyltrimethylammonium Organo-Clays: The Effect of Counter-Ions and Regeneration Studies

Application of Organo-Magadiites for the Removal of Eosin Dye from Aqueous Solutions: Thermal Treatment and Regeneration

Clays and Clay Polymer Composites for Electrokinetic Remediation of Soil

Contact Info

Product

Resources

About