State Key Laboratory of Petroleum Pollution Control, Beijing, 102206, PR China; College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, 610500, PR China.
College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, 610500, PR China.
Chemosphere. 2020 Jan;238:124657. doi: 10.1016/j.chemosphere.2019.124657. Epub 2019 Aug 25.
This study investigates the degradation of petroleum hydrocarbon in contaminated soil using activated persulfate (PS) with ultrasound (US) and US/Fe. Various controlling factors including different PS dosage, ultrasonic power, pH, soil water ratio and soil particle size were considered. It was found that petroleum hydrocarbon degradation efficiency achieved up to 56.41% and 82.23% in US/PS and US/Fe/PS system, respectively. Based on the experimental results, the reaction rate of US/Fe/PS system was faster than US/PS system and the degradation efficiency enhanced significantly with the increasing ultrasonic power. Changing initial solution pH influenced the petroleum hydrocarbon reaction rate and the best performance would be achieved at pH of 5. The present work identified the main components of petroleum hydrocarbon pollutants in shale gas sites. The mechanism of petroleum hydrocarbon degradation on US/Fe/PS system were analyzed.
本研究采用过硫酸盐（PS）结合超声波（US）和 US/Fe 对污染土壤中的石油烃进行降解。考察了不同过硫酸盐投加量、超声功率、pH 值、水土比和土壤粒径等控制因素对石油烃降解效果的影响。结果表明，US/PS 和 US/Fe/PS 体系中石油烃的降解效率分别高达 56.41%和 82.23%。基于实验结果，US/Fe/PS 体系的反应速率快于 US/PS 体系，且随着超声功率的增加，降解效率显著提高。改变初始溶液 pH 值会影响石油烃的反应速率，在 pH 值为 5 时效果最佳。本研究确定了页岩气场地中石油烃污染物的主要成分，并分析了 US/Fe/PS 体系中石油烃降解的机理。
