Diesel exhaust emission soot adsorbent for the removal of dye from wastewater
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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.
KeywordsAdsorption Diesel soot Carbon Water treatment Foam
The authors wish to thank all who assisted in conducting this work.
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Conflict of interest
Authors have no conflict of interest.
Supplementary material 1 (MP4 1892 kb)
- Siddiqui SI, Fatima B, Tara N et al (2018) Recent advances in remediation of synthetic dyes from wastewaters using sustainable and low-cost adsorbents. In: The impact and prospects of green chemistry for textile technology. pp 471–507Google Scholar