Quantitative characterization of pore structure of several biochars with 3D imaging

Jari Hyväluoma, Sampo Kulju, Markus Hannula, Hanne Wikberg, Anssi Källi, Kimmo Rasa

Research output: Contribution to journalArticleScientificpeer-review

8 Citations (Scopus)

Abstract

Pore space characteristics of biochars may vary depending on the used raw material and processing technology. Pore structure has significant effects on the water retention properties of biochar amended soils. In this work, several biochars were characterized with three-dimensional imaging and image analysis. X-ray computed microtomography was used to image biochars at resolution of 1.14 µm and the obtained images were analysed for porosity, pore size distribution, specific surface area and structural anisotropy. In addition, random walk simulations were used to relate structural anisotropy to diffusive transport. Image analysis showed that considerable part of the biochar volume consist of pores in size range relevant to hydrological processes and storage of plant available water. Porosity and pore size distribution were found to depend on the biochar type and the structural anisotopy analysis showed that used raw material considerably affects the pore characteristics at micrometre scale. Therefore, attention should be paid to raw material selection and quality in applications requiring optimized pore structure.
Original languageEnglish
Pages (from-to)25648–25658
Number of pages11
JournalEnvironmental Science and Pollution Research
Volume25
Issue number26
Early online date2017
DOIs
Publication statusPublished - 2018
MoE publication typeA1 Journal article-refereed

Fingerprint

Pore structure
Raw materials
Imaging techniques
image analysis
Image analysis
Pore size
Anisotropy
anisotropy
Porosity
porosity
Three-Dimensional Imaging
structural analysis
water retention
pore space
Structural analysis
Specific surface area
range size
Water
surface area
Soils

Keywords

  • biochar
  • image analysis
  • pore structure
  • soil amendment
  • water retention
  • x-ray tomography

Cite this

Hyväluoma, Jari ; Kulju, Sampo ; Hannula, Markus ; Wikberg, Hanne ; Källi, Anssi ; Rasa, Kimmo. / Quantitative characterization of pore structure of several biochars with 3D imaging. In: Environmental Science and Pollution Research. 2018 ; Vol. 25, No. 26. pp. 25648–25658.
@article{b58d3108069546e4af6ae100412218d8,
title = "Quantitative characterization of pore structure of several biochars with 3D imaging",
abstract = "Pore space characteristics of biochars may vary depending on the used raw material and processing technology. Pore structure has significant effects on the water retention properties of biochar amended soils. In this work, several biochars were characterized with three-dimensional imaging and image analysis. X-ray computed microtomography was used to image biochars at resolution of 1.14 µm and the obtained images were analysed for porosity, pore size distribution, specific surface area and structural anisotropy. In addition, random walk simulations were used to relate structural anisotropy to diffusive transport. Image analysis showed that considerable part of the biochar volume consist of pores in size range relevant to hydrological processes and storage of plant available water. Porosity and pore size distribution were found to depend on the biochar type and the structural anisotopy analysis showed that used raw material considerably affects the pore characteristics at micrometre scale. Therefore, attention should be paid to raw material selection and quality in applications requiring optimized pore structure.",
keywords = "biochar, image analysis, pore structure, soil amendment, water retention, x-ray tomography",
author = "Jari Hyv{\"a}luoma and Sampo Kulju and Markus Hannula and Hanne Wikberg and Anssi K{\"a}lli and Kimmo Rasa",
year = "2018",
doi = "10.1007/s11356-017-8823-x",
language = "English",
volume = "25",
pages = "25648–25658",
journal = "Environmental Science and Pollution Research",
issn = "0944-1344",
publisher = "Springer",
number = "26",

}

Quantitative characterization of pore structure of several biochars with 3D imaging. / Hyväluoma, Jari; Kulju, Sampo; Hannula, Markus; Wikberg, Hanne; Källi, Anssi; Rasa, Kimmo.

In: Environmental Science and Pollution Research, Vol. 25, No. 26, 2018, p. 25648–25658.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Quantitative characterization of pore structure of several biochars with 3D imaging

AU - Hyväluoma, Jari

AU - Kulju, Sampo

AU - Hannula, Markus

AU - Wikberg, Hanne

AU - Källi, Anssi

AU - Rasa, Kimmo

PY - 2018

Y1 - 2018

N2 - Pore space characteristics of biochars may vary depending on the used raw material and processing technology. Pore structure has significant effects on the water retention properties of biochar amended soils. In this work, several biochars were characterized with three-dimensional imaging and image analysis. X-ray computed microtomography was used to image biochars at resolution of 1.14 µm and the obtained images were analysed for porosity, pore size distribution, specific surface area and structural anisotropy. In addition, random walk simulations were used to relate structural anisotropy to diffusive transport. Image analysis showed that considerable part of the biochar volume consist of pores in size range relevant to hydrological processes and storage of plant available water. Porosity and pore size distribution were found to depend on the biochar type and the structural anisotopy analysis showed that used raw material considerably affects the pore characteristics at micrometre scale. Therefore, attention should be paid to raw material selection and quality in applications requiring optimized pore structure.

AB - Pore space characteristics of biochars may vary depending on the used raw material and processing technology. Pore structure has significant effects on the water retention properties of biochar amended soils. In this work, several biochars were characterized with three-dimensional imaging and image analysis. X-ray computed microtomography was used to image biochars at resolution of 1.14 µm and the obtained images were analysed for porosity, pore size distribution, specific surface area and structural anisotropy. In addition, random walk simulations were used to relate structural anisotropy to diffusive transport. Image analysis showed that considerable part of the biochar volume consist of pores in size range relevant to hydrological processes and storage of plant available water. Porosity and pore size distribution were found to depend on the biochar type and the structural anisotopy analysis showed that used raw material considerably affects the pore characteristics at micrometre scale. Therefore, attention should be paid to raw material selection and quality in applications requiring optimized pore structure.

KW - biochar

KW - image analysis

KW - pore structure

KW - soil amendment

KW - water retention

KW - x-ray tomography

UR - http://www.scopus.com/inward/record.url?scp=85015999251&partnerID=8YFLogxK

U2 - 10.1007/s11356-017-8823-x

DO - 10.1007/s11356-017-8823-x

M3 - Article

VL - 25

SP - 25648

EP - 25658

JO - Environmental Science and Pollution Research

JF - Environmental Science and Pollution Research

SN - 0944-1344

IS - 26

ER -