Quiroga J M, Riaza A, Manzano M A
Faculty of Sea and Environmental Sciences, Department of Chemical and Environmental Engineering, CASEM, Cadiz, Spain.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2009 Sep;44(11):1120-6. doi: 10.1080/10934520903005145.
This paper reports the results of the direct treatment of PCBs sorbed to solid particles (glass beads and sand) employing the Fenton process. The results obtained with contaminated sandy soils show 98% removal of the original PCB structure and 82% dechlorination, all within a reaction time of 72 hours. The degree of removal was observed to be dependent on the level of congener chlorination. The optimized conditions were: 5% H(2)O(2); 100 ppm Fe(3+); sandy soil mass/volume of oxidizing solution ratio (m/V) of 1/3 g/mL, vigorous agitation and dispensed with the need for heat. Results obtained by applying an integrated desorption treatment followed by photo-Fenton oxidation to sandy soils contaminated with PCBs are also present in this paper. Desorption of PCBs with surfactant solutions took place to an extent of around 90% (92.2% with K-perfluoroalkyl sulfonate, FT800, and 87% with Lineal Alkyl benzene Sulfonate, LAS), while photo-Fenton oxidation at 254 nm achieved degradation percentages close to 100% in 30 minutes for PCBs in solution, both with FT800 (98%) and LAS (97%) surfactants.
本文报道了采用芬顿法直接处理吸附在固体颗粒（玻璃珠和沙子）上的多氯联苯的结果。对受污染砂土的处理结果表明，在72小时的反应时间内，原始多氯联苯结构的去除率达到98%，脱氯率达到82%。观察到去除程度取决于同系物的氯化程度。优化条件为：5%的过氧化氢；100 ppm的铁离子；砂土质量与氧化溶液体积比（m/V）为1/3 g/mL，剧烈搅拌且无需加热。本文还给出了对受多氯联苯污染的砂土先进行解吸处理，然后进行光芬顿氧化所获得的结果。用表面活性剂溶液对多氯联苯的解吸率约为90%（全氟烷基磺酸钾FT800为92.2%，直链烷基苯磺酸钠LAS为87%），而对于溶液中的多氯联苯，在254 nm下进行光芬顿氧化，使用FT800（98%）和LAS（97%）表面活性剂时，30分钟内降解率接近100%。
