Pyrolytic remediation of crude oil-contaminated soil
Title
Pyrolytic remediation of crude oil-contaminated soil
Subject
Crude oil
Pyrolysis
Efficiency
Soil
Deterioration
Contamination
Remediation
Soil pollution
Soils
Oil spills
Soil surveys
Hexane
Seed
Bentonite
Description
Deterioration of our terrestrial environment due to decreasing soil quality brought on by crude oil spills and leakages is a major issue. In this study, soil samples were prepared by mixing clay (bentonite) and sand contaminated with 5 and 10 wt% crude oil (in order to study the effect of oil concentration), and weathered in a laboratory to simulate actual contaminated soil. Volatilization of light oil was inhibited in clay rich-soil, resulting in higher contamination after weathering. The efficiency of the pyrolytic treatment was evaluated by comparing the weight change and n-hexane extractable material (HEM) content of the soil samples. The working temperature influenced pyrolysis efficiency more than the reaction time. A residual amount of 0.29–0.61 wt% (below the soil pollution standard) was observed in the samples with high clay content and pollution level (by pyrolysis for 30 min at 400 °C). Infrared analysis of treated soil samples showed a reduction in alkyl functionality (CH), confirming a decrease in hydrophobicity and an improvement in water holding capacity (WHC). Seed germination and plant growth were relatively better in the pyrolyzed soil. The field applicability of the pyrolytic treatment process was confirmed at laboratory and pilot scale, as well as by treating soil samples collected from actual polluted sites.
136498
713
Publisher
Science of The Total Environment
Date
2020
Contributor
Kang, Chan-Ung
Kim, Do-Hyeon
Khan, Moonis Ali
Kumar, Rahul
Ji, Seung-Eun
Choi, Kung-Won
Paeng, Ki-Jung
Park, Sungmin
Jeon, Byong-Hun
Type
journalArticle
Identifier
0048-9697
10.1016/j.scitotenv.2020.136498
URL
https://www.sciencedirect.com/science/article/pii/S0048969720300061
Collection
Citation
“Pyrolytic remediation of crude oil-contaminated soil,” Lamar University Midstream Center Research, accessed May 18, 2024, https://lumc.omeka.net/items/show/23759.