Abstract
Diesel exhaust emission soot (DEES) is waste soot particle that has been explored as an adsorbent for a dye rhodamine B (RB). DEES successfully adsorbed the RB from its aqueous solution. Equilibrium was achieved in 90 min. Basic medium (pH > 7) was more favorable than an acidic medium for the adsorption of RB. The study of kinetic of adsorption reveals that both pseudo-first-order and second-order kinetic models fit well to kinetic data of adsorption. Langmuir isotherm best explains the equilibrium study of adsorption. The values of various kinetic and isotherm constants of DEES are compared with that of candle soot, and it is found that DEES is slightly superior to candle soot as an adsorbent. Further, DEES was coated on a polyurethane foam and adsorption–desorption experiments were performed. Also, DEES-coated foam (DEES foam) was successfully reused for six cycles after desorption in ethanol.
Published Version
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