徐金兰 Likes:

Affiliation of Author(s):

环境与市政工程学院

Journal:

Toxicological & Environmental Chemistry and Ecology

Key Words:

中文关键字：改性芬顿氧化原油的选择性；土壤有机质；过氧化氢分解；原油污染土壤；原位化学氧化，英文关键字：Selectivity for modified；soil organic matter; H2O2

Abstract:

Modified Fenton’s (MF) operations affect the selectivity for MF oxidation of crude oil vs. soil organic matter (SOM) in contaminated soils; however, the mechanisms are not known. MF oxidation was tested in the lab to treat two crude oil-contaminated soils using three MF operations: (1) increasing hydrogen peroxide (H2O2) concentration, (2) enhancing iron (Fe(II)) levels, and (3) stepwise addition of H2O2 rather than a single exposure. The experiments demonstrated that the selectivity for MF oxidation of crude oil in the two soils significantly decreased with a rise in H2O2 and Fe(II) concentrations. The total petroleum hydrocarbon (TPH) removal efficiency in the two soils was between 40% and 50% when the concentration of H2O2 was greater than 1100 mM. The limited oxidation of crude oil might possibly be attributed to poor selectivity for MF oxidation of crude oil in soils when the concentration of H2O2 exceeded 1100 mM. The results indicated that sufficient Fe(II) is important for selectively removing TPH. Notably, a 25% higher removal of TPH (51%
58%) was observed in the two soils after stepwise dosing with H2O2 compared with a onestep addition. Data indicated a distinct selectivity for MF oxidation of crude oil vs. SOM by stepwise addition of H2O2. In addition, the findings demonstrated a distinct selectivity for MF oxidation of SOM vs. crude oil when rapid decomposition of H2O2 was present.

Note:

徐金兰

Co-author:

黄福娣,崔祎炜,李修民

First Author:

zhangjing,wangwei,xujinlan

Indexed by:

Journal paper

Volume:

卷：

Issue:

期：

Page Number:

页：

Translation or Not:

no

Date of Publication:

2015-09-01