Adsorption of Acid Dyes from Aqueous Solution onto the Surface of Acid Activated Jaswand Leaf Powder: A Case Study
نویسندگان
چکیده
The plant powder of Jaswand (Hibiscus rosa-Sinensis) were activated with sulphuric acid and used as low cost easily available and renewable biological adsorbent for the removal of acid dyes (acid blue, acid red and malachite green) from aqueous solution. Batch experiments were carried out for adsorption kinetics and isotherms. Operating variable studied were pH, temperature, adsorbent dose, initial concentration of adsorbate. Adsorption capacity seems to be enhanced by increasing temperature, adsorbent dose and for pH. Maximum dye adsorption was found to be in acidic range. Jaswand leaf powder (JLP) treated with Sulphuric acid (H2SO4) solution increased the adsorption efficiency upto 80 percent. Experimental adsorption kinetic data were fitted to be Lagergren first order. Equilibrium data were well represented by the Freundlich Langmuir isotherm model for all tested adsorption systems. Beside these the thermodynamic study has showed that the acid dye adsorption onto the surface of acid activated Jaswand leaf powder (JLP) was physical adsorption and the process was spontaneous and exothermic.
منابع مشابه
Adsorption of Reactive Blue 19 onto activated carbon prepared from pomegranate residual by phosphoric acid activation: Kinetic, Isotherm and Thermodynamic studies
In this study, the adsorption of Reactive blue 19 onto pomegranate residual-based activated carbon PRAC was investigated in aqueous solution. The activated carbon prepared by phosphoric acid activation under air condition. PRAC was characterized for its surface chemistry by point of zero charge measurements, Scanning Electron Microscopy and nitrogen adsorption at 77 K. The effect of operational...
متن کاملAdsorption of the reactive azo dyes onto NH4Cl-induced activated carbon
Background: The efficacy of NH4Cl-induced activated carbon (NAC) was examined in order to adsorb RR198, an azo reactive model dye, from an aqueous solution. Methods: The effects of pH (3 to 10), adsorbent dose (0.1 to 1.2 g/L), dye concentration and contact time on the adsorption efficiency were investigated. Results: The results showed that the removal of dye was highest at a solution pH of ...
متن کاملUltrasonic Assisted Adsorption of Basic Dyes from Binary Component Systems onto ZnO Nanoparticles Loaded on Activated Carbon Derived from Almond Shell: Optimization by Central Composite Design
In this study, ZnO nanoparticles were loaded on activated carbon prepared from almond shell (ZnO-NP-AC). Then, this novel material applied as an efficient adsorbent for the ultrasonic assisted simultaneous removal of Basic Blue 41(BB41) and Basic Red 46 (BR46) in binary solution. The efficiency of proposed activated carbon was enhanced by acid treatment and subsequent modification by physical ...
متن کاملEquilibrium and Thermodynamics Studies for Decolorization of Reactive Black 5 by Adsorption onto Acid Modified Banana Leaf Ash
Abstract Background: At present study, acid modified banana leaf ash was used as an adsorbent for the successful removal of Reactive Black 5 (RB5) dye from aqueous environments. Materials and methods: The effect of various operating parameters such as pH of solution, dye concentration, contact time, adsorbent dosage, and the temperature was investigated. Results: Maximum adsorption capacity of ...
متن کاملToxic metal removal from aqueous solution by advanced Carbon allotropes: a case study from the Sungun Copper Mine
The sorption efficiencies of graphene oxide (GO) and functionalized multi-walled carbon nanotubes (f-MWCNTs) were investigated and elucidated to study their potential in treating acid mine drainage (AMD) containing Cu2+, Mn2+, Zn2+, Pb2+, Fe3+ and Cd2+ metal ions. Several layered GO nanosheets and f-MWCNTs were formed via the modified Hummers’ method and the acid treatment of the MWCNTs, respec...
متن کامل