Adsorption of toxic dye Eosin Y from aqueous solution by clay/carbon composite derived from spent bleaching earth

Abstract

The environmentally friendly clay/carbon composite (SBE/C) was prepared by onestep pyrolysis under N 2 atmosphere at 700°C of spent bleaching earth (SBE) from the industrial waste of the refined oil industry. SBE/C was tested to remove anionic dye Eosin Y from aqueous water. The results revealed that SBE/C had larger specific surface area than SBE, and the equilibrium adsorption capacity of SBE/C (11.15 mg/g) was about 3 times than that of SBE (4.04 mg/g). The adsorption process was found to be exothermic and spontaneous. The adsorption capacity of SBE/C was independent on pH (5-12), and exhibits satisfactorily recyclable performance. Combined with characterization analysis, the adsorption mechanism likely includes electrostatic interaction, hydrogen bonding, hydrophobic interaction, halogen bonding, and π-π interaction. Overall, this exploration of SBE/C might open a window to the design of an efficient and low-cost adsorbent for Eosin Y dye elimination from wastewater.

Synthesis, characterization, and applicability of an acrylic acid-grafted sodium alginate- based Zinc oxide hydrogel nanocomposite for crystal violet dye removal

“…The values of qe are pretty close to qexp of the first model, comparative to the sound and Elkovich model indicating that the adsorption process of CV dye onto the adsorbents fitted the first model. Also, the correlation coefficient obtained from the equation First model was equal to 0.9977, which further proposed that the total adsorption process of the SA-g-(PAAC-co-VBS)/ZnO obeyed the kinetic First model [44,45].…”

Synthesis, structural and DFT investigation of Zn(nba)2(meim)2 for adsorptive removal of eosin yellow dye from aqueous solution

“…DFT studies revealed that adsorption of EY on 1 is primarily due to π-π interactions. [53] γ-Al 2 O 3 Nanoparticles 47.78 [54] Teak leaf litter powder 31.64 [55] Silica functionalized with 1-propyl-3-methylimidazolium chloride 17.73 [56] Pineapple peels 11.76 [57] Clay/Carbon Composite' 11.15 [51] Journal of Inorganic and General Chemistry Zeitschrift für anorganische und allgemeine Chemie…”

“…The band at 701 cm À 1 on 1-EY can be attributed to the CÀ Br bond from EY [51] and the À OH group band of the EY dye is observed at 3443 cm À 1 on 1-EY, [52] indicating its attachment onto 1. There is a reduction in intensity of the asymmetric COO À band coupled with its shift from 1654 cm À 1 in 1 to 1646 cm À 1 in 1-EY and also the shift in the symmetric COO À band from 1395 cm À 1 to 1367 cm À 1 .…”

Environmental Removal of Reactive Blue 49 Dye From Aqueous Solution by (Lemon peels as activated carbon): a Model of Low Cost agricultural waste

“…Textile industries use water in very large quantities in their operations, and therefore the amount of pollutants that come out of these factories is very large and accumulate in the drinking water of rivers and lakes [1][2][3]. The polluted water resulting from the textile industries contains many toxic and dangerous pollutants such as dyes, drugs, organic and inorganic compounds, heavy metals and others; Dyes are considered one of the most dangerous toxic pollutants due to their presence in very high concentrations in water, their high solubility in water, their ability to interact with other compounds, and their being more toxic and difficult to remove using traditional methods [4][5][6][7][8].…”