A combination of ferric nitrate/EDDS-enhanced washing and sludge-derived biochar stabilization of metal-contaminated soils

Jong Chan Yoo, Jingzi Beiyuan, Lei Wang, Daniel C.W. Tsang, Kitae Baek, Nanthi S. Bolan, Yong Sik Ok, Xiang Dong Li

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

In this study, soil washing and stabilization as a two-step soil remediation strategy was performed to remediate Pb- and Cu-contaminated soils from shooting range and railway sites. Ferric nitrate (Fe(NO3)3) and [S,S]-ethylenediamine disuccinate (EDDS) were used as washing agents, whereas three types of sludge-derived biochars and phosphogypsum were employed as soil stabilizers. While Fe(NO3)3 extracted larger amounts of metals compared to EDDS (84% Pb and 64% Cu from shooting range soil; 30% Pb and 40% Cu from railway site soil), it caused severe soil acidification. Both Fe(NO3)3 and EDDS washing enhanced the mobility of residual metals in the two soils, which in most cases could be mitigated by subsequent 2-month stabilization by sludge-derived biochars or phosphogypsum. By contrast, the metal bioaccessibility could only be reduced by soil washing. Nutrient-rich sludge-derived biochar replenished available P and K in both soils, whereas Fe(NO3)3 washing provided available nitrogen (N). Soil amendment enhanced acid phosphatase activity but marginally improved soil dehydrogenase and urease activity in the treated soils, possibly due to the influence of residual metals. This study supported the integration of soil washing (by Fe(NO3)3 or EDDS) with soil stabilization (by sludge-derived biochars or phosphogypsum) for accomplishing the reduction of metal mobility and bioaccessibility, while restoring the environmental quality of the treated soils.

Original languageEnglish
Pages (from-to)572-582
Number of pages11
JournalScience of the Total Environment
Volume616-617
DOIs
Publication statusPublished - 2018 Mar 1

Fingerprint

ethylenediamine
Washing
Nitrates
stabilization
Stabilization
Metals
sludge
nitrate
Soils
metal
soil
railway
biochar
ferric nitrate
contaminated soil

Keywords

  • Bioaccessibility
  • Biodegradable chelant
  • Metal immobilization
  • Sewage sludge
  • Soil amendment
  • Soil washing

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution

Cite this

A combination of ferric nitrate/EDDS-enhanced washing and sludge-derived biochar stabilization of metal-contaminated soils. / Yoo, Jong Chan; Beiyuan, Jingzi; Wang, Lei; Tsang, Daniel C.W.; Baek, Kitae; Bolan, Nanthi S.; Ok, Yong Sik; Li, Xiang Dong.

In: Science of the Total Environment, Vol. 616-617, 01.03.2018, p. 572-582.

Research output: Contribution to journalArticle

Yoo, Jong Chan ; Beiyuan, Jingzi ; Wang, Lei ; Tsang, Daniel C.W. ; Baek, Kitae ; Bolan, Nanthi S. ; Ok, Yong Sik ; Li, Xiang Dong. / A combination of ferric nitrate/EDDS-enhanced washing and sludge-derived biochar stabilization of metal-contaminated soils. In: Science of the Total Environment. 2018 ; Vol. 616-617. pp. 572-582.
@article{395aff7eea18428fa748dc6cd59e32fe,
title = "A combination of ferric nitrate/EDDS-enhanced washing and sludge-derived biochar stabilization of metal-contaminated soils",
abstract = "In this study, soil washing and stabilization as a two-step soil remediation strategy was performed to remediate Pb- and Cu-contaminated soils from shooting range and railway sites. Ferric nitrate (Fe(NO3)3) and [S,S]-ethylenediamine disuccinate (EDDS) were used as washing agents, whereas three types of sludge-derived biochars and phosphogypsum were employed as soil stabilizers. While Fe(NO3)3 extracted larger amounts of metals compared to EDDS (84{\%} Pb and 64{\%} Cu from shooting range soil; 30{\%} Pb and 40{\%} Cu from railway site soil), it caused severe soil acidification. Both Fe(NO3)3 and EDDS washing enhanced the mobility of residual metals in the two soils, which in most cases could be mitigated by subsequent 2-month stabilization by sludge-derived biochars or phosphogypsum. By contrast, the metal bioaccessibility could only be reduced by soil washing. Nutrient-rich sludge-derived biochar replenished available P and K in both soils, whereas Fe(NO3)3 washing provided available nitrogen (N). Soil amendment enhanced acid phosphatase activity but marginally improved soil dehydrogenase and urease activity in the treated soils, possibly due to the influence of residual metals. This study supported the integration of soil washing (by Fe(NO3)3 or EDDS) with soil stabilization (by sludge-derived biochars or phosphogypsum) for accomplishing the reduction of metal mobility and bioaccessibility, while restoring the environmental quality of the treated soils.",
keywords = "Bioaccessibility, Biodegradable chelant, Metal immobilization, Sewage sludge, Soil amendment, Soil washing",
author = "Yoo, {Jong Chan} and Jingzi Beiyuan and Lei Wang and Tsang, {Daniel C.W.} and Kitae Baek and Bolan, {Nanthi S.} and Ok, {Yong Sik} and Li, {Xiang Dong}",
year = "2018",
month = "3",
day = "1",
doi = "10.1016/j.scitotenv.2017.10.310",
language = "English",
volume = "616-617",
pages = "572--582",
journal = "Science of the Total Environment",
issn = "0048-9697",
publisher = "Elsevier",

}

TY - JOUR

T1 - A combination of ferric nitrate/EDDS-enhanced washing and sludge-derived biochar stabilization of metal-contaminated soils

AU - Yoo, Jong Chan

AU - Beiyuan, Jingzi

AU - Wang, Lei

AU - Tsang, Daniel C.W.

AU - Baek, Kitae

AU - Bolan, Nanthi S.

AU - Ok, Yong Sik

AU - Li, Xiang Dong

PY - 2018/3/1

Y1 - 2018/3/1

N2 - In this study, soil washing and stabilization as a two-step soil remediation strategy was performed to remediate Pb- and Cu-contaminated soils from shooting range and railway sites. Ferric nitrate (Fe(NO3)3) and [S,S]-ethylenediamine disuccinate (EDDS) were used as washing agents, whereas three types of sludge-derived biochars and phosphogypsum were employed as soil stabilizers. While Fe(NO3)3 extracted larger amounts of metals compared to EDDS (84% Pb and 64% Cu from shooting range soil; 30% Pb and 40% Cu from railway site soil), it caused severe soil acidification. Both Fe(NO3)3 and EDDS washing enhanced the mobility of residual metals in the two soils, which in most cases could be mitigated by subsequent 2-month stabilization by sludge-derived biochars or phosphogypsum. By contrast, the metal bioaccessibility could only be reduced by soil washing. Nutrient-rich sludge-derived biochar replenished available P and K in both soils, whereas Fe(NO3)3 washing provided available nitrogen (N). Soil amendment enhanced acid phosphatase activity but marginally improved soil dehydrogenase and urease activity in the treated soils, possibly due to the influence of residual metals. This study supported the integration of soil washing (by Fe(NO3)3 or EDDS) with soil stabilization (by sludge-derived biochars or phosphogypsum) for accomplishing the reduction of metal mobility and bioaccessibility, while restoring the environmental quality of the treated soils.

AB - In this study, soil washing and stabilization as a two-step soil remediation strategy was performed to remediate Pb- and Cu-contaminated soils from shooting range and railway sites. Ferric nitrate (Fe(NO3)3) and [S,S]-ethylenediamine disuccinate (EDDS) were used as washing agents, whereas three types of sludge-derived biochars and phosphogypsum were employed as soil stabilizers. While Fe(NO3)3 extracted larger amounts of metals compared to EDDS (84% Pb and 64% Cu from shooting range soil; 30% Pb and 40% Cu from railway site soil), it caused severe soil acidification. Both Fe(NO3)3 and EDDS washing enhanced the mobility of residual metals in the two soils, which in most cases could be mitigated by subsequent 2-month stabilization by sludge-derived biochars or phosphogypsum. By contrast, the metal bioaccessibility could only be reduced by soil washing. Nutrient-rich sludge-derived biochar replenished available P and K in both soils, whereas Fe(NO3)3 washing provided available nitrogen (N). Soil amendment enhanced acid phosphatase activity but marginally improved soil dehydrogenase and urease activity in the treated soils, possibly due to the influence of residual metals. This study supported the integration of soil washing (by Fe(NO3)3 or EDDS) with soil stabilization (by sludge-derived biochars or phosphogypsum) for accomplishing the reduction of metal mobility and bioaccessibility, while restoring the environmental quality of the treated soils.

KW - Bioaccessibility

KW - Biodegradable chelant

KW - Metal immobilization

KW - Sewage sludge

KW - Soil amendment

KW - Soil washing

UR - http://www.scopus.com/inward/record.url?scp=85033363948&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85033363948&partnerID=8YFLogxK

U2 - 10.1016/j.scitotenv.2017.10.310

DO - 10.1016/j.scitotenv.2017.10.310

M3 - Article

AN - SCOPUS:85033363948

VL - 616-617

SP - 572

EP - 582

JO - Science of the Total Environment

JF - Science of the Total Environment

SN - 0048-9697

ER -