Colloidal interactions of micro-sized biochar and a kaolinitic soil clay

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Autoren

  • Nga T. Mai
  • Anh M. Nguyen
  • Nga T.T. Pham
  • Anh T.Q. Nguyen
  • Thom T. Nguyen
  • Chi L. Do
  • Nam H. Nguyen
  • Stefan Dultz
  • Minh N. Nguyen

Externe Organisationen

  • Vietnam National University
  • Ha Tay Community College (HTCC)
  • Vietnam Academy of Agricultural Sciences (Vaas)
  • Tay Nguyen University (TNU)
  • Hanoi University of Technology
Forschungs-netzwerk anzeigen

Details

OriginalspracheEnglisch
Aufsatznummer139844
FachzeitschriftScience of the Total Environment
Jahrgang738
Frühes Online-Datum1 Juni 2020
PublikationsstatusVeröffentlicht - 10 Okt. 2020

Abstract

Fine-sized biochars and clay minerals co-present in various circumstances, e.g., agricultural land and water treatment. Because both of these materials are scavengers for nutrients, agrochemicals and other toxicants, their dispersibility and transportability have received much attention. However, little is documented about their colloidal interactions and to what extent biochar particles can stimulate the dispersion of clay minerals. Here, the effect of engineered micro-sized biochar amendment on the surface charge (SC) and colloidal dynamics of the clay fraction of a kaolinite-rich soil was determined. The engineered biochars showed distinctive SC and colloidal properties depending on their pyrolysis conditions (e.g., oxygen level and temperature) and solution chemistry (i.e., pH and cation type). Two types of biochars prepared under non-biochar-oriented pyrolysis (open heating, ‘O-biochar’) and biochar-oriented pyrolysis (N2-supported heating, ‘N2-biochar’) showed contrasting effects on the colloidal dynamics of clay. The O-biochars provoked aggregation due to their higher content of soluble salts, which increased ionic strength and provided multivalent cations, inducing bridging between negatively charged colloids. In contrast, the N2 biochars low in soluble salts and rich in negatively charged burned organic matter compounds favoured the dispersion of clay. The adjustment of biochar production methods can therefore be highlighted as the way to customize biochar for specific uses or to reduce the risk of clay loss from soils in the short term. In the long term, when soluble salts are removed by leaching, it is likely that dispersion is facilitated and the risk for erosion increases.

ASJC Scopus Sachgebiete

Zitieren

Colloidal interactions of micro-sized biochar and a kaolinitic soil clay. / Mai, Nga T.; Nguyen, Anh M.; Pham, Nga T.T. et al.
in: Science of the Total Environment, Jahrgang 738, 139844, 10.10.2020.

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Mai, NT, Nguyen, AM, Pham, NTT, Nguyen, ATQ, Nguyen, TT, Do, CL, Nguyen, NH, Dultz, S & Nguyen, MN 2020, 'Colloidal interactions of micro-sized biochar and a kaolinitic soil clay', Science of the Total Environment, Jg. 738, 139844. https://doi.org/10.1016/j.scitotenv.2020.139844
Mai, N. T., Nguyen, A. M., Pham, N. T. T., Nguyen, A. T. Q., Nguyen, T. T., Do, C. L., Nguyen, N. H., Dultz, S., & Nguyen, M. N. (2020). Colloidal interactions of micro-sized biochar and a kaolinitic soil clay. Science of the Total Environment, 738, Artikel 139844. https://doi.org/10.1016/j.scitotenv.2020.139844
Mai NT, Nguyen AM, Pham NTT, Nguyen ATQ, Nguyen TT, Do CL et al. Colloidal interactions of micro-sized biochar and a kaolinitic soil clay. Science of the Total Environment. 2020 Okt 10;738:139844. Epub 2020 Jun 1. doi: 10.1016/j.scitotenv.2020.139844
Mai, Nga T. ; Nguyen, Anh M. ; Pham, Nga T.T. et al. / Colloidal interactions of micro-sized biochar and a kaolinitic soil clay. in: Science of the Total Environment. 2020 ; Jahrgang 738.
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title = "Colloidal interactions of micro-sized biochar and a kaolinitic soil clay",
abstract = "Fine-sized biochars and clay minerals co-present in various circumstances, e.g., agricultural land and water treatment. Because both of these materials are scavengers for nutrients, agrochemicals and other toxicants, their dispersibility and transportability have received much attention. However, little is documented about their colloidal interactions and to what extent biochar particles can stimulate the dispersion of clay minerals. Here, the effect of engineered micro-sized biochar amendment on the surface charge (SC) and colloidal dynamics of the clay fraction of a kaolinite-rich soil was determined. The engineered biochars showed distinctive SC and colloidal properties depending on their pyrolysis conditions (e.g., oxygen level and temperature) and solution chemistry (i.e., pH and cation type). Two types of biochars prepared under non-biochar-oriented pyrolysis (open heating, {\textquoteleft}O-biochar{\textquoteright}) and biochar-oriented pyrolysis (N2-supported heating, {\textquoteleft}N2-biochar{\textquoteright}) showed contrasting effects on the colloidal dynamics of clay. The O-biochars provoked aggregation due to their higher content of soluble salts, which increased ionic strength and provided multivalent cations, inducing bridging between negatively charged colloids. In contrast, the N2 biochars low in soluble salts and rich in negatively charged burned organic matter compounds favoured the dispersion of clay. The adjustment of biochar production methods can therefore be highlighted as the way to customize biochar for specific uses or to reduce the risk of clay loss from soils in the short term. In the long term, when soluble salts are removed by leaching, it is likely that dispersion is facilitated and the risk for erosion increases.",
keywords = "Biochar, Colloidal properties, Pyrolysis conditions, Soil clay, Surface charge",
author = "Mai, {Nga T.} and Nguyen, {Anh M.} and Pham, {Nga T.T.} and Nguyen, {Anh T.Q.} and Nguyen, {Thom T.} and Do, {Chi L.} and Nguyen, {Nam H.} and Stefan Dultz and Nguyen, {Minh N.}",
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language = "English",
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journal = "Science of the Total Environment",
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TY - JOUR

T1 - Colloidal interactions of micro-sized biochar and a kaolinitic soil clay

AU - Mai, Nga T.

AU - Nguyen, Anh M.

AU - Pham, Nga T.T.

AU - Nguyen, Anh T.Q.

AU - Nguyen, Thom T.

AU - Do, Chi L.

AU - Nguyen, Nam H.

AU - Dultz, Stefan

AU - Nguyen, Minh N.

N1 - Funding information: This research is supported by the VinTech Fund , a grant for applied research managed by VinTech City.

PY - 2020/10/10

Y1 - 2020/10/10

N2 - Fine-sized biochars and clay minerals co-present in various circumstances, e.g., agricultural land and water treatment. Because both of these materials are scavengers for nutrients, agrochemicals and other toxicants, their dispersibility and transportability have received much attention. However, little is documented about their colloidal interactions and to what extent biochar particles can stimulate the dispersion of clay minerals. Here, the effect of engineered micro-sized biochar amendment on the surface charge (SC) and colloidal dynamics of the clay fraction of a kaolinite-rich soil was determined. The engineered biochars showed distinctive SC and colloidal properties depending on their pyrolysis conditions (e.g., oxygen level and temperature) and solution chemistry (i.e., pH and cation type). Two types of biochars prepared under non-biochar-oriented pyrolysis (open heating, ‘O-biochar’) and biochar-oriented pyrolysis (N2-supported heating, ‘N2-biochar’) showed contrasting effects on the colloidal dynamics of clay. The O-biochars provoked aggregation due to their higher content of soluble salts, which increased ionic strength and provided multivalent cations, inducing bridging between negatively charged colloids. In contrast, the N2 biochars low in soluble salts and rich in negatively charged burned organic matter compounds favoured the dispersion of clay. The adjustment of biochar production methods can therefore be highlighted as the way to customize biochar for specific uses or to reduce the risk of clay loss from soils in the short term. In the long term, when soluble salts are removed by leaching, it is likely that dispersion is facilitated and the risk for erosion increases.

AB - Fine-sized biochars and clay minerals co-present in various circumstances, e.g., agricultural land and water treatment. Because both of these materials are scavengers for nutrients, agrochemicals and other toxicants, their dispersibility and transportability have received much attention. However, little is documented about their colloidal interactions and to what extent biochar particles can stimulate the dispersion of clay minerals. Here, the effect of engineered micro-sized biochar amendment on the surface charge (SC) and colloidal dynamics of the clay fraction of a kaolinite-rich soil was determined. The engineered biochars showed distinctive SC and colloidal properties depending on their pyrolysis conditions (e.g., oxygen level and temperature) and solution chemistry (i.e., pH and cation type). Two types of biochars prepared under non-biochar-oriented pyrolysis (open heating, ‘O-biochar’) and biochar-oriented pyrolysis (N2-supported heating, ‘N2-biochar’) showed contrasting effects on the colloidal dynamics of clay. The O-biochars provoked aggregation due to their higher content of soluble salts, which increased ionic strength and provided multivalent cations, inducing bridging between negatively charged colloids. In contrast, the N2 biochars low in soluble salts and rich in negatively charged burned organic matter compounds favoured the dispersion of clay. The adjustment of biochar production methods can therefore be highlighted as the way to customize biochar for specific uses or to reduce the risk of clay loss from soils in the short term. In the long term, when soluble salts are removed by leaching, it is likely that dispersion is facilitated and the risk for erosion increases.

KW - Biochar

KW - Colloidal properties

KW - Pyrolysis conditions

KW - Soil clay

KW - Surface charge

UR - http://www.scopus.com/inward/record.url?scp=85085937410&partnerID=8YFLogxK

U2 - 10.1016/j.scitotenv.2020.139844

DO - 10.1016/j.scitotenv.2020.139844

M3 - Article

C2 - 32526417

AN - SCOPUS:85085937410

VL - 738

JO - Science of the Total Environment

JF - Science of the Total Environment

SN - 0048-9697

M1 - 139844

ER -