Assessment of biomass ash applications in soil and cement mortars

Lorenzo Tosti, André van Zomeren, Jan R. Pels, Joris J. Dijkstra, Rob N.J. Comans*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)

Abstract

The pH-dependent availability and leaching of major and trace elements was investigated for a wide range of biomass ash from different fuels and conversion technologies. A technical and environmental assessment of selected biomass ash for application in soil or cement mortars was performed, using both the total content and leaching of elements. A large variation in biomass ash composition, yet consistent pH dependent leaching patterns were observed for most elements and conversion technologies. Chromium showed a distinct behaviour which was hypothesized to reflect redox conditions during conversion of the biomass. The leaching based approach was found to provide a more realistic assessment of the availability of desired (i.e. nutrients) and undesired elements (i.e. contaminants) in soil systems. When applied to a reference soil at a rate of 2% by weight, the selected biomass ash increased the concentration of particularly Cr, Mo and Zn in soil solution to a level of concern. For cement applications, the release of Ba, Cr and Mo can become of concern during the second life stage, but the release was not attributed to the included biomass ash. Both soil and cement matrixes were found to control the release of elements such as Cu, V and Ni (soil) and As, Cr and Mo (cement) when compared to the released from pure biomass ash, underlining the importance of evaluating the availability and leaching of desired and undesired elements in the application scenario. Given current regulatory criteria, beneficial utilization of biomass ash in cement may be more feasible than in soil, but regulatory criteria based on leaching rather than total content of elements may widen the application potential of biomass ash.

Original languageEnglish
Pages (from-to)425-437
Number of pages13
JournalChemosphere
Volume223
DOIs
Publication statusPublished - 1 May 2019

Fingerprint

Ashes
mortar
Mortar
Biomass
Cements
cement
ash
Soil
Soils
Leaching
biomass
leaching
soil
Availability
Technology
redox conditions
Trace Elements
Chromium
environmental assessment
Trace elements

Keywords

  • Availability
  • Biomass ash
  • Cement
  • pH-dependent leaching
  • Regulations
  • Soil amendment

Cite this

Tosti, Lorenzo ; van Zomeren, André ; Pels, Jan R. ; Dijkstra, Joris J. ; Comans, Rob N.J. / Assessment of biomass ash applications in soil and cement mortars. In: Chemosphere. 2019 ; Vol. 223. pp. 425-437.
@article{1363e4cffcfb4676a6f17b26f89e03f4,
title = "Assessment of biomass ash applications in soil and cement mortars",
abstract = "The pH-dependent availability and leaching of major and trace elements was investigated for a wide range of biomass ash from different fuels and conversion technologies. A technical and environmental assessment of selected biomass ash for application in soil or cement mortars was performed, using both the total content and leaching of elements. A large variation in biomass ash composition, yet consistent pH dependent leaching patterns were observed for most elements and conversion technologies. Chromium showed a distinct behaviour which was hypothesized to reflect redox conditions during conversion of the biomass. The leaching based approach was found to provide a more realistic assessment of the availability of desired (i.e. nutrients) and undesired elements (i.e. contaminants) in soil systems. When applied to a reference soil at a rate of 2{\%} by weight, the selected biomass ash increased the concentration of particularly Cr, Mo and Zn in soil solution to a level of concern. For cement applications, the release of Ba, Cr and Mo can become of concern during the second life stage, but the release was not attributed to the included biomass ash. Both soil and cement matrixes were found to control the release of elements such as Cu, V and Ni (soil) and As, Cr and Mo (cement) when compared to the released from pure biomass ash, underlining the importance of evaluating the availability and leaching of desired and undesired elements in the application scenario. Given current regulatory criteria, beneficial utilization of biomass ash in cement may be more feasible than in soil, but regulatory criteria based on leaching rather than total content of elements may widen the application potential of biomass ash.",
keywords = "Availability, Biomass ash, Cement, pH-dependent leaching, Regulations, Soil amendment",
author = "Lorenzo Tosti and {van Zomeren}, Andr{\'e} and Pels, {Jan R.} and Dijkstra, {Joris J.} and Comans, {Rob N.J.}",
year = "2019",
month = "5",
day = "1",
doi = "10.1016/j.chemosphere.2019.02.045",
language = "English",
volume = "223",
pages = "425--437",
journal = "Chemosphere",
issn = "0045-6535",
publisher = "Elsevier",

}

Assessment of biomass ash applications in soil and cement mortars. / Tosti, Lorenzo; van Zomeren, André; Pels, Jan R.; Dijkstra, Joris J.; Comans, Rob N.J.

In: Chemosphere, Vol. 223, 01.05.2019, p. 425-437.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Assessment of biomass ash applications in soil and cement mortars

AU - Tosti, Lorenzo

AU - van Zomeren, André

AU - Pels, Jan R.

AU - Dijkstra, Joris J.

AU - Comans, Rob N.J.

PY - 2019/5/1

Y1 - 2019/5/1

N2 - The pH-dependent availability and leaching of major and trace elements was investigated for a wide range of biomass ash from different fuels and conversion technologies. A technical and environmental assessment of selected biomass ash for application in soil or cement mortars was performed, using both the total content and leaching of elements. A large variation in biomass ash composition, yet consistent pH dependent leaching patterns were observed for most elements and conversion technologies. Chromium showed a distinct behaviour which was hypothesized to reflect redox conditions during conversion of the biomass. The leaching based approach was found to provide a more realistic assessment of the availability of desired (i.e. nutrients) and undesired elements (i.e. contaminants) in soil systems. When applied to a reference soil at a rate of 2% by weight, the selected biomass ash increased the concentration of particularly Cr, Mo and Zn in soil solution to a level of concern. For cement applications, the release of Ba, Cr and Mo can become of concern during the second life stage, but the release was not attributed to the included biomass ash. Both soil and cement matrixes were found to control the release of elements such as Cu, V and Ni (soil) and As, Cr and Mo (cement) when compared to the released from pure biomass ash, underlining the importance of evaluating the availability and leaching of desired and undesired elements in the application scenario. Given current regulatory criteria, beneficial utilization of biomass ash in cement may be more feasible than in soil, but regulatory criteria based on leaching rather than total content of elements may widen the application potential of biomass ash.

AB - The pH-dependent availability and leaching of major and trace elements was investigated for a wide range of biomass ash from different fuels and conversion technologies. A technical and environmental assessment of selected biomass ash for application in soil or cement mortars was performed, using both the total content and leaching of elements. A large variation in biomass ash composition, yet consistent pH dependent leaching patterns were observed for most elements and conversion technologies. Chromium showed a distinct behaviour which was hypothesized to reflect redox conditions during conversion of the biomass. The leaching based approach was found to provide a more realistic assessment of the availability of desired (i.e. nutrients) and undesired elements (i.e. contaminants) in soil systems. When applied to a reference soil at a rate of 2% by weight, the selected biomass ash increased the concentration of particularly Cr, Mo and Zn in soil solution to a level of concern. For cement applications, the release of Ba, Cr and Mo can become of concern during the second life stage, but the release was not attributed to the included biomass ash. Both soil and cement matrixes were found to control the release of elements such as Cu, V and Ni (soil) and As, Cr and Mo (cement) when compared to the released from pure biomass ash, underlining the importance of evaluating the availability and leaching of desired and undesired elements in the application scenario. Given current regulatory criteria, beneficial utilization of biomass ash in cement may be more feasible than in soil, but regulatory criteria based on leaching rather than total content of elements may widen the application potential of biomass ash.

KW - Availability

KW - Biomass ash

KW - Cement

KW - pH-dependent leaching

KW - Regulations

KW - Soil amendment

U2 - 10.1016/j.chemosphere.2019.02.045

DO - 10.1016/j.chemosphere.2019.02.045

M3 - Article

VL - 223

SP - 425

EP - 437

JO - Chemosphere

JF - Chemosphere

SN - 0045-6535

ER -