Scholarlink

<p>A novel thermal remediation process was proposed to remove petroleum hydrocarbon contaminants (PHCs) from soil at low temperature conditions (100–200&#xa0;°C). In this process, the contaminated soils were remediated by the combination of low temperature thermal desorption and oxidation. The performance was evaluated experimentally with artificially contaminated soil in a laboratory device. The effects of types of crude oil, soil texture and treatment parameters were also investigated in this study. The experimental results showed that a relatively high contaminant removal level (i.e. 74.31% for light crude oil and 65.12% for heavy crude oil) was achieved at 180&#xa0;°C for 60&#xa0;min. The exponential decay model was used to predict the experimental data and the kinetics parameters are obtained. The activation energy was in the range of 12.35–22.41&#xa0;kJ/mol, revealing that the proposed process was kinetically controlled by the oxidation reaction of petroleum hydrocarbons. Associated with the gas analysis results, a parallel removal mechanism was proposed, suggesting that desorption (i.e. evaporation and vaporization) occurred in parallel with the low temperature oxidation of hydrocarbons. In addition, it was expected that the proposed process had a minimal reduction (less than 10%) on soil organic matter (SOM). Although complete removal may not be accomplished, the lower energy intensity, minimal SOM reduction and relatively high removal efficiency make the novel process an ideal pre-treatment method for subsequent remediation treatment.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Coupling of low temperature thermal desorption and oxidation for the remediation of crude oil contaminated soil

  • 期刊论文

  • 发表日期：

    2025年2月20日

查看全文
  • Xiaoling Chen,
  • Longfei Li,
  • Yongxing Zhang,
  • Hongbo Gu

摘要

A novel thermal remediation process was proposed to remove petroleum hydrocarbon contaminants (PHCs) from soil at low temperature conditions (100–200 °C). In this process, the contaminated soils were remediated by the combination of low temperature thermal desorption and oxidation. The performance was evaluated experimentally with artificially contaminated soil in a laboratory device. The effects of types of crude oil, soil texture and treatment parameters were also investigated in this study. The experimental results showed that a relatively high contaminant removal level (i.e. 74.31% for light crude oil and 65.12% for heavy crude oil) was achieved at 180 °C for 60 min. The exponential decay model was used to predict the experimental data and the kinetics parameters are obtained. The activation energy was in the range of 12.35–22.41 kJ/mol, revealing that the proposed process was kinetically controlled by the oxidation reaction of petroleum hydrocarbons. Associated with the gas analysis results, a parallel removal mechanism was proposed, suggesting that desorption (i.e. evaporation and vaporization) occurred in parallel with the low temperature oxidation of hydrocarbons. In addition, it was expected that the proposed process had a minimal reduction (less than 10%) on soil organic matter (SOM). Although complete removal may not be accomplished, the lower energy intensity, minimal SOM reduction and relatively high removal efficiency make the novel process an ideal pre-treatment method for subsequent remediation treatment.