A promising approach of ultrasound assisted oxidative desulfurization (UAOD) was studied for deep desulfurization of simulated sulphated turpentine containing dimethyl disulphide (DMDS) as model pollutant. The effect of ultrasound parameters such as power (80-120 W) and duty cycle (50-80%) as well as operating conditions as initial concentration (50-100 ppm), volume (100-300 ml) and temperature (28 °C as ambient condition, 50-70 °C) on the extent of desulfurization have been studied. The effect of addition of various oxidizing agents such as hydrogen peroxide over the range of 3-18 g/L, Fenton reagent by varying FeSO4 loading from 0.75 g/L to 1.75 g/L at constant H2O2 loading and titanium dioxide (loading over the range 1-4 g/L) in the presence of ultrasonic horn have also been investigated at laboratory scale. The addition of oxidizing agents in presence of ultrasound enhanced the extent of DMDS removal. The extent of desulfurization was found to be remarkably low for individual approaches as compared to combination approaches of US/oxidizing agents. The kinetic analysis revealed that oxidation follows first order kinetics. A significant increase in cavitational yield was observed for combination approach of US/H2O2/TiO2 (5.78 × 10-9 g/L) compared to individual ultrasound approach (2.04 × 10-9 g/L). Under best conditions of 120 W power, 70% duty cycle, 50 ppm initial concentration, 15 g/L H2O2 loading and 4 g/L TiO2 loading, 100% desulfurization was obtained at 23.19 Rs/L as the treatment cost. Based on the obtained results it can be concluded that US/H2O2/TiO2 approach is highly efficient desulfurization technique for deep desulfurization of simulated sulphated turpentine.

中文翻译：

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超声辅助松节油中二甲基二硫化物的氧化深度脱硫。

研究了一种超声辅助氧化脱硫（UAOD）的有前途的方法，该方法可用于以二甲基二硫（DMDS）为模型污染物的模拟硫酸盐松节油的深度脱硫。超声参数的影响，例如功率（80-120 W）和占空比（50-80％）以及操作条件，如初始浓度（50-100 ppm），体积（100-300 ml）和温度（28° C作为环境条件，在50-70°C的条件下对脱硫程度进行了研究。添加各种氧化剂（例如3-18 g / L范围内的过氧化氢），通过在恒定H2O2负载下将FeSO4的负载量从0.75 g / L更改为1.75 g / L和Fenton试剂以及二氧化钛的作用也已在实验室规模下研究了在存在超声变幅杆的情况下的1-4 g / L范围）。在超声波的存在下添加氧化剂可增加DMDS的去除程度。发现与US /氧化剂的组合方法相比，单个方法的脱硫程度非常低。动力学分析表明氧化遵循一级动力学。与单独的超声方法（2.04×10-9 g / L）相比，US / H2O2 / TiO2的组合方法（5.78×10-9 g / L）的空化产率显着提高。在120 W功率，70％占空比，50 ppm初始浓度，15 g / L H2O2负载和4 g / L TiO2负载的最佳条件下，以23.19 Rs / L作为处理成本可获得100％脱硫。