Analysis and modeling of column operations on reactive dye removal onto alkaline-treated biomass fly ash

Abstract

A B S T R A C TThe adsorption characteristics of Reactive Black 5 (RB5) dye on alkaline-treated biomass fly ash (TFA) were investigated in aqueous solutions in a fixed-bed column. The breakthrough curves increased with decreasing initial dye concentration and the flow rate, and with increasing bed depth. In this column study, the optimum flow rate and bed depth were 5 ml min −1 and 10 cm, respectively. The Thomas model provided a good prediction of the breakthrough curve of RB5 removal by the TFA. The maximum adsorption capacity from the column study was in accordance with the equilibrium capacity in a batch experiment. The bed-depth service time model was used to describe the effect of bed depth on the breakthrough curves, and it revealed a good fit with the experimental data. These results suggest that the fixed-bed TFA is suitable for treating dye wastewater.

Fabrication and Characterization of Highly Porous Fe(OH)3@Cellulose Hybrid Fibers for Effective Removal of Congo Red from Contaminated Water

“…And adsorption is one of the most commonly used methods because of its simplicity, effectiveness, ease of operation, and reusability. 8,9 A large number of adsorbents, such as clays, 10 metal oxides, 11 activated carbon, 7 and fly ash 12 have been applied to remove dyes from wastewater. However, owing to the high cost and the difficulties related to disposal and regeneration, most of these adsorbents cannot be widely used.…”

“…A large number of adsorbents, such as clays, metal oxides, activated carbon, and fly ash have been applied to remove dyes from wastewater. However, owing to the high cost and the difficulties related to disposal and regeneration, most of these adsorbents cannot be widely used.…”

Removal of Lead(II) Ions from Aqueous Solution Using Jatropha curcas L. Seed Husk Ash as a Biosorbent

“…More recently, the ash of agricultural waste and by‐products has been reported to remove heavy metal ions from wastewater (Gupta and Sharma, 2003; Fan et al, 2010; Pengthamkeerati and Satapanajaru 2015). Studies have demonstrated that fly ash derived from organic material may be particularly suited to the removal of heavy metals because of the high proportion of unburned C and Si (15–22% SiO 2 in a hydrated amorphous form like silica gel) (Khalid et al, 2000) present in these materials.…”

A Critical Insight into Biomass Derived Biosorbent for Bioremediation of Dyes

“…Of these limited column studies, most of the investigators found that column sorption capacity severely influenced by column operational parameters including flow rate, bed depth and influent dye concentration. [2] During an investigation on continuous remediation of Reactive Black 5 by alkaline-treated fly ash packed in a packed column, Pengthamkeerati et al [170] observed that column dye removal performance increases with decreasing influent dye concentration, raising bed depth and reducing flow rate. The authors used the Thomas model, which showed a good estimation of the Reactive Black 5 breakthrough curve by fly ash.…”

“…During an investigation on continuous remediation of Reactive Black 5 by alkaline‐treated fly ash packed in a packed column, Pengthamkeerati et al . observed that column dye removal performance increases with decreasing influent dye concentration, raising bed depth and reducing flow rate.…”