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.
Highlights
Textile industries rank first in the usage of dyes when compared to other industries like food, paper, cosmetics and carpet industries 1
The percentage of dye removal decreased from 62.96 % to 53.85 % for TPAC and 96.30% to 83.08% for pyrrole polymer composite (PPC) while increasing the initial dye concentrations from 25 to 100 mg/L
Kinetic studies showed that adsorption of DB71 by TPAC and PPC followed pseudo- second order model
Summary
Textile industries rank first in the usage of dyes when compared to other industries like food, paper, cosmetics and carpet industries 1. In order to determine the rate of adsorption, experiments were conducted at different initial dye concentrations ranging from 25 to 100 mg/L at 30°C. The variation in the percentage removal of DB71 with contact time at an initial dye concentration of 50 mg/L by various adsorbents TPAC and PPC are shown in Figure.[3].
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