化工进展 ›› 2020, Vol. 39 ›› Issue (11): 4726-4733.DOI: 10.16085/j.issn.1000-6613.2020-0246

• 资源与环境化工 • 上一篇    下一篇

机械化学法修复石油烃污染土壤及对土壤特性的影响

张金永1(), 汪林1, 王明新1,2(), 肖扬1, 韩莹1,2   

  1. 1.常州大学环境与安全工程学院,江苏 常州 213164
    2.江苏省石油化工安全与环保 工程研究中心,江苏 常州 213164
  • 出版日期:2020-11-05 发布日期:2020-11-06
  • 通讯作者: 王明新
  • 作者简介:张金永(1995—),男,硕士研究生,研究方向为污染场地修复。E-mail:229047318@qq.com
  • 基金资助:
    国家自然科学基金(41772240);江苏省“六大人才高峰”培养对象项目(JNHB-003)

Mechanochemical remediation of petroleum hydrocarbons contaminated soil and its effects on soil properties

Jinyong ZHANG1(), Lin WANG1, Mingxin WANG1,2(), Yang XIAO1, Ying HAN1,2   

  1. 1.College of Environment and Safety Engineering, Changzhou University, Changzhou 213164, Jiangsu, China
    2.Jiangsu Engineering Research Center of Petrochemical Safety and Environmental Protection, Changzhou 213164, Jiangsu, China
  • Online:2020-11-05 Published:2020-11-06
  • Contact: Mingxin WANG

摘要:

以典型石油烃正十六烷为特征污染物,采用批次实验研究机械化学处理对模拟石油烃污染土壤的修复效果及影响因素;采用GC/MS分析土壤中正十六烷的降解产物,通过XRD、FTIR、SEM和BET对处理前后土壤样品进行表征,并分析土壤有机碳含量的变化,揭示石油烃污染土壤的机械化学法修复机理。结果表明,在球磨机转速为500r/min,球料比为35∶1,大、中、小钢球配比为2∶5∶3,正十六烷投加量为2.5μL/g时,球磨4h后正十六烷降解率达95.86%。球磨处理过后土壤颗粒表面变粗糙,助磨效果较好的石英含量显著增多。与处理前相比,球磨处理后未检出短链烷烃,表明正十六烷降解较为彻底。土壤有机碳含量和吸附能力显著提高,使得残留低浓度石油烃难以全部去除。机械化学法修复石油烃污染土壤具有快速、高效、彻底等优势,具有良好的应用前景。

关键词: 土壤, 石油烃, 机械化学修复, 理化性质

Abstract:

Batch experiments were used to study the mechanochemical method for remediation effects and influencing factors of simulated petroleum hydrocarbon-contaminated soil with the typical petroleum hydrocarbon n-hexadecane as a characteristic pollutant; GC/MS was used to analyze the degradation products of n-hexadecane in the soil. XRD, FTIR, SEM and BET were applied for the characterization of the soil samples before and after treatment and the changes in soil organic matter content were analyzed, revealing the mechanism of mechanochemical method for remediation of petroleum-contaminated soil. The results showed that the degradation rate of n-hexadecane reached 95.86% after ball milling with 4h at a ball mill speed of 500r/min, a ball-to-material ratio of 35∶1, a large, medium, and small steel ball ratio of 2∶5∶3, and a dosage of n-hexadecane of 2.5μL/g, The surface of soil particles became rough and the quartz content with better grinding aid was significantly increased after ball milling. Compared with the tested soil before pretreatment, no short chain alkane was detected after milling treatment, suggesting that n-hexadecane degradation was more thorough. It was difficult to completely remove residual low-concentration petroleum hydrocarbons due to the improvement of soil organic carbon content and adsorption capacity. The mechanochemical method shows excellent application potential due to its advantages of rapidness, efficiency and completeness in remediation of petroleum hydrocarbons contaminated soil.

Key words: soil, petroleum hydrocarbons, mechanochemical remediation, physical- chemical properties

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