Banana Fibers as Sorbent for Removal of Acid Green Dye from Water

Abstract

In this study, banana fibers extracted from banana leaves, stem, and stalk were used to remove acid green dye from aqueous solution. Three initial concentrations (750, 1000, and 1500 ppm) were chosen to determine the kinetic characteristics of the banana fiber sorbents at 25 ∘ C, agitation speed of 200 rpm, and total contact time of 3 hours. The pseudo-first-order, pseudo-second-order, and Dunwald-Wagner kinetic models were applied to the experimental kinetic data. For isotherm study, the batch experiments were performed at 25 ∘ C, initial pH 2, agitation speed of 200 rpm, and initial concentrations between 100 and 2000 ppm. The experimental data was fitted to the Langmuir, Freundlich, Dubinin-Radushkevich, and Temkin isotherms. The equilibrium was achieved in less than 90 minutes. The removal of the acid green dye was found to be following closely the pseudo-second-order kinetic model. For equilibrium study, the Freundlich isotherm was found to fit well with adsorption of acid green dye on the banana leaves, stem, and stalk sorbents. The calculated mean free energy of 4-11 J/mol indicated that the sorption process was mostly physical in nature. Experimental results also showed the adsorption performance is greatly affected by the initial solution pH.

Assessment of isotherm and kinetic adsorption modelling for dye removal using banana stem as green alternative adsorbent

“…Temkin Model is a mathematical model that assumes that the heat of adsorption of all molecules in the layer will decrease linearly rather than logarithmically with coverage at average concentrations. Therefore, the Temkin Isotherm Models can be written in Equation 4 [17]: ) 𝐶 𝑒 (4) where b is the Temkin constant, which is proportional to the heat of adsorption (𝐽𝑚𝑜𝑙 −1 ), and KT is the Temkin isotherm constant (𝐿𝑔 −1 ) [14], which is proportional to the adsorption heat, and A is the equilibrium adsorption constant. ln 𝑞 𝑒 versus 𝜀 2 is plotted from the experimental data to derive the value of 𝑅𝑇 𝑏 𝑇 𝑙n and (…”

Synthesis and Characterization of Alginate Encapsulated Zirconium-Based Ferromagnetic Sorbent for Adsorptive Removal of Dyes

“…This observation is similar for all the surfaces of adsorbed dyes. This indicates that a coating of the adsorbed layer of dyes might be formed over the ferromagnetic sorbent surface and some of the pores were covered with the adsorbed dyes [15]. To elucidate the changes in surface functional groups of the ferromagnetic sorbent, a FT-IR analysis was carried out with the data shown in Figure 8.…”

Isolation and Characterization of Magnetic Oil Palm Empty Fruits Bunch Cellulose Nanofiber Composite as a Bio-Sorbent for Cu(II) and Cr(VI) Removal

“…There is increasing interest of utilizing biobased materials from the natural resources in various industrial and environmental applications due to the rapid depletion of global petrochemical-based resources and environmental pollution concern [15,17]. Among the various biobased materials, the plant cellulosic materials have attracted wide interest because of environmentally friendly nature, abundance availability, biodegradability and renewability [17,18]. Le Phuong et al [17] utilized bamboo fiber as a renewable material in the fabrication of the sustainable and biodegradable nonwoven composite membrane.…”

“…Le Phuong et al [17] utilized bamboo fiber as a renewable material in the fabrication of the sustainable and biodegradable nonwoven composite membrane. Abdul Karim et al [18] utilized banana fiber obtained from the banana leaves as bio-sorbent for the removal of dye from the wastewater. Wang et al [19] fabricated superhydrophobic coating and sorbent using hydrophobic cellulose nanofiber suspension for oil-water separation.…”

“…Generally, the lignocellulosic biomass mainly consists of cellulose, hemicellulose, and lignin with high hydroxyl groups and other reactive functional groups on the surface [16,21]. There is increasing interest in using cellulose nanofiber (CNF) as a bio-sorbent in wastewater treatment because of its large surface area, smaller particle size distribution, high porosity, excellent mechanical and thermal properties [18,24,25]. The CNF has been isolated from the various lignocellulosic biomass, including bamboo [24], rice straw [25], sugarcane bagasse [26] cotton [27], and oil palm biomass [28].…”