Kang Namgoo, Hua Inez
School of Civil Engineering, 550 Stadium Mall Drive, Purdue University, West Lafayette, Indiana 47907-2051, USA.
Chemosphere. 2005 Nov;61(7):909-22. doi: 10.1016/j.chemosphere.2005.03.039.
Fenton's destruction of benzene, toluene, ethylbenzene, and xylene (BTEX) was investigated in soil slurry batch reactors. The purpose of the investigation was to quantify the enhancement of oxidation rates and efficiency by varying process conditions such as iron catalyst (Fe(II) or Fe(III); 2, 5, and 10mM), hydrogen peroxide (H2O2; 30, 150, 300 mM), and metal chelating agents (l-ascorbic acid, gallic acid, or N-(2-hydroxyethyl)iminodiacetic acid). Rapid contaminant mass destruction (97% after 3h) occurred in the presence of 300 mM H2O2 and 10 mM Fe(III). An enhanced removal rate (>90% removal after 15 min and 95% removal after 3h) was also observed by combining Fe(III), N-(2-hydroxyethyl)iminodiacetic acid and 300 mM H2O2. The observed BTEX mass removal rate constants (3.6-7.8 x 10(-4)s(-1)) were compared to the estimated rate constants (4.1-10.1 x 10(-3)s(-1)). The influence of non-specific oxidants loss (by reaction with iron hydroxides and soil organic matter) was also explored.
在土壤泥浆间歇式反应器中研究了芬顿法对苯、甲苯、乙苯和二甲苯（BTEX）的降解。该研究的目的是通过改变工艺条件，如铁催化剂（Fe(II)或Fe(III)；2、5和10mM）、过氧化氢（H2O2；30、150、300mM）和金属螯合剂（L-抗坏血酸、没食子酸或N-(2-羟乙基)亚氨基二乙酸），来量化氧化速率和效率的提高。在300mM H2O2和10mM Fe(III)存在的情况下，污染物质量迅速降解（3小时后降解97%）。通过将Fe(III)、N-(2-羟乙基)亚氨基二乙酸和300mM H2O2结合使用，也观察到了提高的去除率（15分钟后去除率>90%，3小时后去除率95%）。将观察到的BTEX质量去除速率常数（3.6-7.8×10(-4)s(-1)）与估计的速率常数（4.1-10.1×10(-3)s(-1)）进行了比较。还探讨了非特异性氧化剂损失（通过与氢氧化铁和土壤有机质反应）的影响。
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