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选取腐殖酸重要组分胡敏酸、富里酸、胡敏素为研究对象,研究了不同老化时间下多环芳烃(PAHs)在腐殖酸各组分中的赋存特征.同时,探究了过硫酸钠、高锰酸钾、芬顿试剂、过氧化氢4种氧化剂氧化PAHs过程中污染物在腐殖酸和上清液中的分布情况,确定胡敏酸、富里酸、胡敏素中PAHs的降解效率.实验结果表明,PAHs在胡敏素中存在吸附滞后现象,老化前期胡敏素对PAHs的吸附速率慢、吸附量少,但老化后期出现吸附量的反超,因此,胡敏素、胡敏酸和富里酸中PAHs的最终吸附量并没有明显差异.高环PAHs在3种腐殖酸组分中的吸附速率和最终吸附量远小于低、中环PAHs.过硫酸钠和高锰酸钾能够较好地去除胡敏酸、富里酸、胡敏素中的大部分PAHs,去除率均在95%左右,芬顿试剂对胡敏酸、富里酸和胡敏素中总PAHs的去除效果差别不大,去除率均在79.36%~88.05%之间;过氧化氢对胡敏酸和胡敏素中PAHs的去除率分别为82.82%和61.77%,而对富里酸中PAHs的去除效果最差,去除率仅为43.96%.过硫酸钠和高锰酸钾是氧化PAHs类有机污染土壤的最佳氧化剂,能够有效提高不同组分腐殖酸中PAHs的去除率.
The humic acid humic acid, fulvic acid and humin were selected as the research objects to study the occurrence characteristics of polycyclic aromatic hydrocarbons (PAHs) in humic acid under different aging time.At the same time, Sodium, Potassium Permanganate, Fenton’s reagent, Hydrogen Peroxide Oxidation of PAHs in humic acid and supernatant, to determine the degradation efficiency of PAHs in humic acid, fulvic acid and humin The experimental results show that there are adsorption hysteresis in humin in PAHs, and the adsorption rate of PAHs is slow and the amount of adsorption is low in the pre-aging humic acid, but the amount of adsorption is reversed in the late aging stage. Therefore, the contents of PAHs in humin, humic acid and fulvic acid The adsorption capacity of the high-ring PAHs was much less than that of the low-PAHs in the three kinds of humic acid components.The sodium persulfate and potassium permanganate could remove the humic acid , Fulvic acid, humin in most of the PAHs, removal rates were about 95%, Fenton’s reagent on the humic acid, fulvic acid and humin total PAHs removal effect is not very different, the removal rates were 79.36% ~ 88.05% Between; hydrogen peroxide on humic acid And humin PAHs were 82.82% and 61.77%, respectively, while PAHs in fulvic acid had the worst removal efficiency, with a removal rate of only 43.96% .Sodium persulfate and potassium permanganate were the PAHs-contaminated soils The best oxidant, can effectively improve the removal of PAHs in different components of humic acid.