Comparative Studies of the Adsorption of Direct Dye on Activated Carbon and Conducting Polymer Composite

Abstract

This study analyses the feasibility of removing Direct Blue 71 from aqueous solution by different adsorbents such as activated carbon (TPAC) and Poly pyrrole polymer composite (PPC) prepared fromThevetia Peruviana. Batch mode adsorption was performed to investigate the adsorption capacities of these adsorbents by varying initial dye concentration, temperature, agitation time and pH. The performance of TPAC was compared with PPC. Among the adsorbents, PPC had more adsorption capacity (88.24%) than TPAC (58.82%) at an initial concentration of 50 mg/L and at 30°C. The experimental data best fitted with pseudo second order kinetic model. The adsorption data fitted well for Langmuir adsorption isotherm. Thermodynamic parameters for the adsorbents were also evaluated. The carbon embedded in conducting polymers matrix show better adsorptive properties than activated carbon.

Application of response surface methodology (RSM) for optimization of color removal from POME by granular activated carbon

“…Increasing pH value from 2.0 to 8.4 was observed to diminish the adsorption capacity, whereas the successive increase in pH value up to 12 no longer had a significant effect on the adsorption capacity. Gupta et al (2009) and Baseri et al (2012) presented comparable results on dye removal by activated carbon adsorption. Similar findings were reported by Gupta et al (2011) on chromium removal that there was a limit (pH 5) at which the pH could be increased to get maximum removal efficiency.…”

Operational parameters affecting the removal and recycling of direct blue industrial dye from wastewater using bleached oil mill waste as alternative adsorbent material

“…[2] The Direct Blue 78 photocatalytic degradation using TiO2 nanoparticles immobilized on recycled wool-based nonwoven material, was presented by Markovic et al [16] The DB 71 adsorption from aqueous solution onto pistachio hull waste as a low-cost adsorbent was also presented by Biglari et al [17] Activated carbon and poly pyrrole polymer composite prepared from Thevetia Peruviana were presented as materials to adsorb DB 71. [18] Without doubt the list is not complete for describing the plethora of studies in literature about the azoic blue dye removal or its degradation in aqueous environment, however in the present paper we highlight the use of a handy material exhibiting very high capabilities in sequestering the direct dye within few minutes in appropriate conditions. Moreover the recycle of DB 78 by means of desorption was obtained, enabling the possibility to color again cotton fibers, with 3 an environmental friendly green cycle and an alternative use of oil mill waste.…”

Direct Blue 71 Removal from Aqueous Solutions by Adsorption on Pistachio Hull Waste: Equilibrium, Kinetic and Thermodynamic Studies

“…A high level of removal in pH 2 can be due to a positive surface charge and protonation of active sites because of the increasing effects of H + ions concentration in solution, which triggers high electrostatic gravity force between positive charges of adsorbent surface anionic dye. When pH increases, the electrostatic repulsion force increases, and the removal rate decreases as well (35,36). Raffiea Baseri et al (35) and Rasoulifard et al (36) studies are noted that when pH increases, the electrostatic repulsion force increases, and the removal rate decreases as well.…”