Pyrolysis as a Remediation Strategy for Weathered Oil-Contaminated Soil: The Role of Minerals and Native Organic Matter

作者：Haohao Bian, Hao Zhou, Dehui Kong, Junhao Huang, Sher Bahadar Khan, Teik‐Thye Lim, Zhang Lin, Liyuan Chai, Xintai Su · 发表于：ACS ES&T Engineering · 年份：2024 · DOI：10.1021/acsestengg.4c00845 · 被引用次数：7 · 研究领域：Microbial bioremediation and biosurfactants、Thermochemical Biomass Conversion Processes、Electrokinetic Soil Remediation Techniques

Soil contaminated by weathered oil (WO) is the most challenging and toxic type of oily sludge (OS) to remediate. Its pyrolysis behavior is significantly affected by soil composition, including minerals and natural organic matter, yet the interaction mechanism remains unclear. This study systematically investigates the influence of natural minerals and organic matter on the pyrolysis behavior of WO-contaminated soil, with a particular focus on the mechanisms of key minerals (e.g., SiO 2, CaO, MgO, Fe 2 O 3, and Al 2 O 3 ) and natural organic matter, represented by humic acid (HA). The findings reveal substantial differences in the catalytic performance of various minerals during pyrolysis. MgO and CaO exhibit exceptional catalytic cracking capabilities in the mid- to high-temperature range, significantly enhancing the quality of pyrolysis-derived oil and gas fuels. Fe 2 O 3 demonstrates superior performance at elevated temperatures by promoting aromatic stability and hydrogen production. Moreover, HA, in synergy with minerals, optimizes pyrolysis pathways, improves hydrocarbon fuel yields, and refines the characteristics of the residual materials. This study further elucidates the distribution patterns of pyrolysis products and their intricate interactions with minerals and organic matter, providing critical insights for the efficient remediation of WO-contaminated soil. These findings offer a novel perspective on the restoration and resource utilization of WO-contaminated soi...