Sorption studies of methyl red dye removal using lemon grass (Cymbopogon citratus)

Abstract

Lemongrass leaf based activated carbon (LGLAC) was prepared using physico-chemical methods for methyl red (MR) dye removal from aqueous solutions. The surface chemistry of LGLAC before adsorption revealed the presence of different functional groups: O-H, C-H, C = O, CH 3 , C = C, NO , CO and C-N which were shifted after methyl red dye adsorption. Brunauer-Emmett-Teller surface and mesopore areas are 836.04 m 2 /g and 598.6 04 m 2 /g, whereas, the average pore diameter and total pore volume of LGLAC are 3.62 nm and 0.472 cm 3 /g respectively. Batch adsorption was studied using different parameters: initial dye concentrations (25-500 mg/L), contact time (0-24 h), solution temperature (30-60 °C) and solution pH (2-12). Adsorption of methyl red dye was observed to increase with increase in initial dye concentration, contact time and solution temperature. The methyl red dye adsorption uptake and percentage removal at equilibrium showed that the adsorption process is majorly dependent on the initial dye concentration. Optimum percentage of methyl red dye removed was observed at pH 2. The adsorption process of methyl red dye onto LGLAC was endothermic in nature. Thermodynamic parameters, including entropy change (S 0), enthalpy change (H 0), and Gibbs free energy change (G 0) were evaluated. The adsorption process was endothermic and the mechanism followed a physisorption process.

Modification of Mg/Al-LDH Intercalated Metal Oxide (Mg/Al-Ni) to Improve The Performance of Methyl Orange and Methyl Red Dyes Adsorption Process

“…Many dyes are thrown into the water from industrial activities that disrupt the environmental ecosystem every year (Rashed et al, 2022) . Dyes that are widely used in industrial processes are methyl orange (Rashed et al, 2022;Wu et al, 2022;Muslim et al, 2021) and methyl red (Rajoriya et al, 2021;Takkar et al, 2022;Ahmad et al, 2019). Dyes can a ect ecosystems in water because they reduce the transmission of sunlight through water and can cause severe damage to humans, such as reproductive system disorders, brain, liver, and central nervous system (Adegoke and Bello, 2015) .…”

Trapping Rhodamine B dye using functionalized mango (Mangifera indica) pod

“…In recent times, the continual increase in the development of modern industries comes with attendant challenges: harmful effects caused by water pollution have become increasingly severe (Adegoke & Bello, 2015; Ahmad et al, 2019; Ahmad & Alrozi, 2010; Bello et al, 2015; Bulgariu et al, 2019; Dahri et al, 2016). Among several pollutants found in industrial sewages, dyes are the most undesirable both on esthetical and toxicological grounds (Ahmad et al, 2014; Bello, Adegoke, et al, 2017; Crini, 2015; Li et al, 2021; Ojedokun & Bello, 2017; Zhang et al, 2016).…”

“…Nonetheless, the cost of commercial activated carbon (AC) (CAC) limits the broader applications of the adsorption technique. Therefore, research into finding novel agricultural waste materials that can effectively remove dyes from the effluents remains a hot topic (Adegoke & Bello, 2015; Ahmad et al, 2019 Ahmad & Alrozi, 2010; Bello et al, 2015, 2020; Bello, Adegoke, Sarumi, et al, 2019; Bulgariu et al, 2019; Dahri et al, 2016). These materials are readily available at zero cost in different parts of the world, they have become huge pollutants themselves.…”

Bio-Adsorbent Derived from Sewage Sludge Blended with Waste Coal for Nitrate and Methyl Red Removal: Synthesis, Oxidation, Performance and Environmental Consideration

“…Due to the high cost of industrial activated carbons, research on activated carbon materials extracted from bio-waste, such as olive stones, lemon grass, wall nutshells and pine cones has taken center stage [5,6,7,8] and among these, activated carbon extracted from sewage sludge (SBAC) has shown promise in the adsorption of inorganic elements such as Ni, Cu, Pb, Cd and Hg [1,9,10,11,12,13].…”