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Oxidation of nine petroleum hydrocarbon compounds by combined hydrogen peroxide/sodium persulfate catalyzed by siderite.
Environmental Science and Pollution Research Pub Date : 2020-04-30 , DOI: 10.1007/s11356-020-08968-x
YueHua Li 1, 2 , Lin Zhao 1, 2 , Fulong Chen 3 , Kylan S Jin 4 , Paul H Fallgren 4 , Liang Chen 1, 5
Affiliation  

A system consisting of hydrogen peroxide/persulfate (H2O2/S2O82−) catalyzed by siderite was attempted to oxidize nine representative petroleum hydrocarbon compounds [benzene, toluene, ethylbenzene, m-xylene, p-xylene, o-xylene, 1,2,4-trimethylbenzene, methyl-tert-butyl ether, and naphthalene] that tend to persist in the environment. Oxidation under different siderite dosages, H2O2:S2O82− ratios, and pH conditions were investigated. Results indicated that oxidation rates increased from 1.21–4.62 to 1.77–8.94 d−1 as siderite increased from 0.16 to 0.48 g/40 mL (H2O2:Na2S2O8 = 5:1, initial pH = 3.0), except for naphthalene (decreased from 0.58 to 0.45 d−1 with increased siderite dosage). When the H2O2:S2O82− ratio was increased from 1:1 to 5:1 (siderite = 0.16 g, initial pH = 3.0), the oxidation rates increased from 0.02–0.73 to 0.33–2.19 d−1. However, as pH increased to > 5.5 (siderite = 0.16 g, H2O2:Na2S2O8 = 2.5:1), the oxidation rates of petroleum hydrocarbons decreased to 0.003–0.09 d−1, which was approximately 90% less than that at pH = 3.0. The partial correlations and principal component analysis of the experimental data were conducted. Overall, both siderite dosage and H2O2:S2O82− ratio correlated positively with oxidation efficiency. The oxidation potential by H2O2/S2O82− mixtures towards the target petroleum hydrocarbon compounds seemed to be more sensitive to pH conditions than to siderite dosages or H2O2:S2O82− ratios.



中文翻译:

菱铁矿催化的过氧化氢/过硫酸钠联合氧化九种石油烃类化合物。

尝试由菱铁矿催化的由过氧化氢/过硫酸盐(H 2 O 2 / S 2 O 8 2-)组成的系统氧化九种代表性的石油烃化合物[苯,甲苯,乙苯,间二甲苯,对二甲苯,邻二甲苯二甲苯,1,2,4-三甲基苯,甲基叔丁基醚和萘]倾向于在环境中持续存在。研究了在不同菱铁矿剂量,H 2 O 2:S 2 O 8 2-的比例和pH条件下的氧化。结果表明,氧化速度从1.21–4.62增加到1.77–8.94 d -1,而菱铁矿从0.16增加到0.48 g / 40 mL(H 2O 2:Na 2 S 2 O 8  = 5:1,初始pH = 3.0),但萘除外(随着菱铁矿用量的增加,从0.58降至0.45 d -1)。当H 2 ö 2:S 2 ö 8 2-比从1:1增加到5:1(菱铁矿= 0.16克,初始pH = 3.0)时,氧化速率从0.02-0.73增加到0.33-2.19 d - 1。但是,随着pH值增加到> 5.5(菱铁矿= 0.16 g,H 2 O 2:Na 2 S 2 O 8  = 2.5:1),石油碳氢化合物的氧化速率下降到0.003-0.09 d-1,比pH = 3.0时约低90%。进行了实验数据的偏相关和主成分分析。总体而言,菱铁矿用量和H 2 O 2:S 2 O 8 2-的比例均与氧化效率呈正相关。H 2 O 2 / S 2 O 8 2-混合物对目标石油烃化合物的氧化电位似乎对pH条件比菱铁矿剂量或H 2 O 2:S 2 O 8 2-的比例更敏感。

更新日期:2020-07-01
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