Degradation of high concentrations of PCE solubilized in SDS and biosurfactant with Fe/Ni bi-metallic particles
Degradation of high concentrations of PCE solubilized in SDS and biosurfactant with Fe/Ni bi-metallic particles
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DOI：
10.1016/j.colsurfa.2008.02.009
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发表时间：
2008-06-05
影响因子：
5.2
通讯作者：
Vipulanandan, C.
中科院分区：
文献类型：
--
作者：
Harendra, S.;Vipulanandan, C.
研究了一种快速溶解和降解四氯乙烯（PCE）的方法。在室温下，在连续搅拌间歇式反应器中研究了用阴离子（十二烷基硫酸钠（SDS））和生物表面活性剂（UH-生物表面活性剂）提高四氯乙烯（100 mg/L 于水中）的水溶性。随着表面活性剂浓度增加至 10 g/L，PCE 在表面活性剂溶液中的溶解度呈线性增加。在研究的两种表面活性剂中，生物表面活性剂每克表面活性剂可溶解更多的四氯乙烯。为了降解溶解的四氯乙烯，在连续搅拌间歇反应器中使用了双金属铁镍 (Fe-Ni) 颗粒。采用溶液法合成了双金属颗粒，并利用 SEM、EDS 和 XRD 对颗粒进行了表征。两种表面活性剂溶液中溶解度为 500 mg/L（水溶解度五倍）的四氯乙烯会被 200 g/L 双金属 Fe-Ni 颗粒以不同速率降解。溶解在超高氢生物表面活性剂中的四氯乙烯在不到3小时内被完全降解，这是与过去使用的化学和生物方法相比在最短时间内降解的最高浓度的四氯乙烯。对 PCE 降解后溶液中的最终产物进行分析，以确定副产物和氯化物浓度，以确保 PCE 完全降解。溶解在水和 SDS 溶液中的 PCE 的降解动力学是线性的，溶解在 UH-生物表面活性剂中的 PCE 具有更高的阶次。 (C) 2008 Elsevier B.V. 保留所有权利。
A method to rapidly solubilize and degrade perchloroethylene(PCE) was investigated. Enhancing the water solubility of PCE (100 mg/L in water) with an anionic (sodium dodecyl sulfate (SDS)) and a biosurfactant (UH-biosurfactant) were investigated at room temperature in continuously stirred batch reactors. The solubility of PCE in the surfactant solutions increased linearly with increase in surfactant concentrations up to 10 g/L. Of the two surfactants studied, biosurfactant solubilized more PCE per gram of surfactant. To degrade solubilized PCE, bi-metallic iron-nickel (Fe-Ni) particles were used in continuously stirred batch reactors. The bi-metallic particles were synthesized using the solution method and the particles were characterized using the SEM, EDS and XRD. The PCE solubilized in the range of 500 mg/L (five times the water solubility) in both surfactant solutions were degraded at various rates by 200 g/L of bi-metallic Fe-Ni particles. PCE solubilized in the UH-biosurfactant was totally degraded in less than 3 h,which is the highest concentration of PCE degraded in the shortest time compared to the chemical and biological methods used in the past. End products in the solution after the PCE degradation were analyzed to determine the by products and the chloride concentration to ensure complete degradation of PCE. While the degradation kinetics of PCE solubilized in water and SDS solution were linear, PCE solubilized in the UH-biosurfactant was of a higher order. (C) 2008 Elsevier B.V. All rights reserved.