[1]徐金兰,宋少花,黄廷林,等.柠檬酸改性Fenton 氧化石油污染土壤的影响因素研究[J].西安建筑科技大学学报:自然科学版,2015,47(04):605-608.[doi:10.15986/j.1006-7930.2015.04.025]
　XU Jinlan,SONG Shaohua,HUANG Tinglin,et al.Study on influence factors of citric acid modified Fenton oxidation of petroleum-contaminated soil[J].J.Xi’an Univ. of Arch. & Tech.:Natural Science Edition,2015,47(04):605-608.[doi:10.15986/j.1006-7930.2015.04.025]
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柠檬酸改性Fenton 氧化石油污染土壤的影响因素研究()
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西安建筑科技大学学报:自然科学版[ISSN:1006-7930/CN:61-1295/TU]

卷:
47
期数:
2015年04期
页码:
605-608
栏目:
出版日期:
2015-08-31

文章信息/Info

Title:
Study on influence factors of citric acid modified Fenton oxidation of petroleum-contaminated soil
文章编号:
1006-7930(2015)04-0605-4
作者:
徐金兰; 宋少花; 黄廷林; 雷绒娟; 崔祎炜; 黄福娣
西安建筑科技大学环境与市政工程学院，陕西 西安 710055
Author(s):
XU Jinlan;  SONG Shaohua;  HUANG Tinglin;  LEI Rongjuan;  CUI Yiwei;  HUANG Fudi
School of Environmental and Municipal Engineering, Xi’an Univ. of Arch. & Tech., Xi’an, 710055, China
关键词:
柠檬酸; H2O2 浓度; 改性Fenton 氧化; 石油污染土壤; H2O2 分次投加
Keywords:
Citric acid;  H2O2 concentration;  modified Fenton oxidation;  petroleum-contaminated soil;  stepwise addition of H2O2
分类号:
X55
DOI:
10.15986/j.1006-7930.2015.04.025
文献标志码:
A
摘要:
分别在6 个柠檬酸浓度、8 个H2O2 浓度及分次投加H2O2 条件下对2 种石油污染土壤进行了柠檬酸改性Fenton 氧化实验．结果表明：柠檬酸浓度过低时，土壤有机物（SOM）易被氧化，过高时会消耗羟基自由基不利于土壤中石油（TPH）的氧化，得出适宜的柠檬酸浓度为15 mM．在该柠檬酸浓度条件下，提高H2O2 的投加浓度，SOM 氧化率基本不变，提高了H2O2 的利用率．结果表明，土壤油浓度越大，所需投加的H2O2 浓度越高，对于土壤S1（TPH=26.9 g/kg）和土壤S2（TPH=89.7g/kg）而言，适宜的H2O2 浓度分别为1 100mM 和1 700mM．此外，H2O2 分次投加明显提高了柠檬酸改性Fenton 氧化石油污染土壤的效果，对于油浓度大的土壤S2 的效果尤为明显，900 mM 的H2O2 分4 次投加后，TPH 的去除率由一次投加H2O2的22%提高到49%（提高了2.2 倍），与一次投加1 700 mM H2O2 的氧化效果（51%）相当，表明H2O2 分次投加后，H2O2的投量节约了50%．
Abstract:
Two petroleum-contaminated soils were oxidized by citric acid modified Fenton. The effects of six citric acid concentrations, eight H2O2 concentrations and stepwise addition of dosing H2O2 on oxidation of total petroleum hydrocarbon (TPH) in soils were investigated. The results show that it is very important to control the citric acid concentration for oxidation of petroleum-contaminated soil. Soil organic matter (SOM) was susceptible to oxidize to result in low removal of TPH when the citric acid concentration was lower or higher than 15 mM. So the suitable concentration of citric acid was 15 mM at 5.8 mM of iron. For citric acid modified Fenton, utilization of H2O2 is highly efficient because the removal efficiency of SOM is low when H2O2 concentration increase. For soil S1 (TPH=26.9 g/kg) the suitable concentration of H2O2 was 1100 mM while the suitable concentration of H2O2 was 1700 mM for heavy oil contaminated soil S2 (TPH=89.7 g/kg). In addition, the removal efficiency of TPH increased obviously in two soils by stepwise addition of dosing H2O2. For heavily polluted soil S2, after 4 stepwise addition of dosing 900 mM H2O2, the removal efficiency of TPH was increased 2.2 times, which was equal to TPH removal (51%) after a pluse addition of 1700 mM H2O2 . Therefore, the stepwise addition of dosing H2O2 is the best way for heavy oil polluted soil to oxidize crude oil as 50% of H2O2 dosage is decreased.

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备注/Memo

备注/Memo:
收稿日期：2015-03-25 修改稿日期：2015-07-31
基金项目：国家自然科学基金项目（51378413；51208416）
作者简介：徐金兰（1973-），女，教授，博导，主要研究方向为石油污染土壤修复. E-mail：xujinlan@xauat.edu.cn
更新日期/Last Update: 2015-10-31