Thermal remediation alters soil properties – a review. (15th January 2018)

• Record Type: Journal Article
• Authors: O'Brien, Peter L.; DeSutter, Thomas M.; Casey, Francis X.M.; Khan, Eakalak; Wick, Abbey F.
• Is Part Of: Journal of environmental management. Volume 206(2018)
• Page Start: 826
• Page End: 835
• Publication Date: 2018-01-15
• Subjects: Soil remediation -- Soil reclamation -- Soil contamination -- Thermal desorption -- Thermal treatment; Environmental policy -- Periodicals; Environmental management -- Periodicals; Environment -- Periodicals; Ecology -- Periodicals; 363.705
• DOI: 10.1016/j.jenvman.2017.11.052
• Languages: English
• ISSNs: 0301-4797

Abstract

Abstract: Contaminated soils pose a risk to human and ecological health, and thermal remediation is an efficient and reliable way to reduce soil contaminant concentration in a range of situations. A primary benefit of thermal treatment is the speed at which remediation can occur, allowing the return of treated soils to a desired land use as quickly as possible. However, this treatment also alters many soil properties that affect the capacity of the soil to function. While extensive research addresses contaminant reduction, the range and magnitude of effects to soil properties have not been explored. Understanding the effects of thermal remediation on soil properties is vital to successful reclamation, as drastic effects may preclude certain post-treatment land uses. This review highlights thermal remediation studies that have quantified alterations to soil properties, and it supplements that information with laboratory heating studies to further elucidate the effects of thermal treatment of soil. Notably, both heating temperature and heating time affect i) soil organic matter; ii) soil texture and mineralogy; iii) soil pH; iv) plant available nutrients and heavy metals; v) soil biological communities; and iv) the ability of the soil to sustain vegetation. Broadly, increasing either temperature or time results in greater contaminant reduction efficiency, but it also causes more severe impacts to soil characteristics. Thus, project managers must balance the need for contaminant reduction with the deterioration of soil function for each specific remediation project. Highlights: Thermal remediation alters soil properties based on heating time and temperature. Contaminant type and project goals dictate heating conditions for remediation. Understanding impacts to soil characteristics makes reclamation more successful.