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.

中文翻译：

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柴油机尾气排放烟灰吸附剂，用于去除废水中的染料

柴油机尾气排放烟灰（DEES）是一种废烟灰颗粒，已被研究用作染料若丹明B（RB）的吸附剂。DEES成功地从其水溶液中吸附了RB。在90分钟内达到平衡。碱性介质（pH> 7）比酸性介质更适合吸附RB。对吸附动力学的研究表明，拟一级动力学模型和二级动力学模型都非常适合吸附动力学数据。Langmuir等温线最能解释吸附的平衡研究。将DEES的各种动力学常数和等温常数的值与烛灰的常数进行比较，发现DEES作为吸附剂略优于烛灰。此外，将DEES涂在聚氨酯泡沫上，并进行了吸附-解吸实验。也，