In this study, we investigated the degradation of surfactant sodium dodecyl benzene sulfonate (SDBS) in aqueous solution using electron beam radiation. The removal efficiency of SDBS approached nearly 100%, achieving a COD removal rate of 7–20% with an absorbed dose of 5.0 kGy. Upon irradiation, several notable changes in SDBS micelles were observed. The absolute value of zeta potential and the average diameter size decreased. SEM observations revealed that the clustered aggregates of SDBS micelles fragmented into irregular filamentous pieces. Moreover, the interfacial tension increased remarkably and approached the level of pure water at 2.5 kGy for SDBS in a pure water solution and 5.0 kGy for SDBS in a brine water solution. The foaming power disappeared for SDBS in pure water and decreased to 20 mm for SDBS in brine water at 10 kGy. The defoaming rate of SDBS solution increased incrementally from an initial range of 1–2 mm/min to 3.0–5.6 mm/min at 5.0 kGy. In summary, when SDBS is decomposed, new system is created with new properties. Electron beam radiation offers a clean and sustainable approach to degrade SDBS in wastewater.

中文翻译：

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电子束辐射降解水溶液中十二烷基苯磺酸钠及表面活性剂胶束性质的变化


在这项研究中，我们利用电子束辐射研究了表面活性剂十二烷基苯磺酸钠（SDBS）在水溶液中的降解情况。 SDBS的去除效率接近100%，在吸收剂量为5.0 kGy时，COD去除率达到7%~20%。照射后，观察到 SDBS 胶束的一些显着变化。 Zeta电位的绝对值和平均直径尺寸减小。 SEM 观察表明，SDBS 胶束的聚集体碎裂成不规则的丝状碎片。此外，纯水溶液中SDBS的界面张力为2.5kGy，盐水水溶液中SDBS的界面张力为5.0kGy，界面张力显着增加并接近纯水的水平。 SDBS 在纯水中的起泡能力消失，而在 10 kGy 的盐水中 SDBS 的起泡能力下降至 20 mm。在 5.0 kGy 下，SDBS 溶液的消泡速率从最初的 1-2 mm/min 逐渐增加到 3.0-5.6 mm/min。总之，当SDBS分解时，会创建具有新属性的新系统。电子束辐射提供了一种清洁且可持续的方法来降解废水中的 SDBS。