Effects of lead mineralogy on soil washing enhanced by ferric salts as extracting and oxidizing agents

Jong Chan Yoo; Sang Min Park; Geun Seok Yoon; Daniel C.W. Tsang; Kitae Baek

doi:10.1016/j.chemosphere.2017.07.046

Effects of lead mineralogy on soil washing enhanced by ferric salts as extracting and oxidizing agents

Jong Chan Yoo
, Sang Min Park
, Geun Seok Yoon
, Daniel C.W. Tsang
, Kitae Baek^*

^*Corresponding author for this work

Environmental Engineering

Korea Institute of Geoscience and Mineral Resources
Jeonbuk National University
Hong Kong Polytechnic University

Research output: Contribution to journal › Journal article › peer-review

24 Scopus citations

Abstract

In this study, we evaluated the feasibility of using ferric salts including FeCl₃ and Fe(NO₃)₃ as extracting and oxidizing agents for a soil washing process to remediate Pb-contaminated soils. We treated various Pb minerals including PbO, PbCO₃, Pb₃(CO₃)₂(OH)₂, PbSO₄, PbS, and Pb₅(PO₄)₃(OH) using ferric salts, and compared our results with those obtained using common washing agents of HCl, HNO₃, disodium-ethylenediaminetetra-acetic acid (Na₂-EDTA), and citric acid. The use of 50 mM Fe(NO₃)₃ extracted significantly more Pb (above 96% extraction) from Pb minerals except PbSO₄ (below 55% extraction) compared to the other washing agents. In contrast, washing processes using FeCl₃ and HCl were not effective for extraction from Pb minerals because of PbCl₂ precipitation. Yet, the newly formed PbCl₂ could be dissolved by subsequent wash with distilled water under acidic conditions. When applying our washing method to remediate field-contaminated soil from a shooting range that had high concentrations of Pb₃(CO₃)₂(OH)₂ and PbCO₃, we extracted more Pb (approximately 99% extraction) from the soil using 100 mM Fe(NO₃)₃ than other washing agents at the same process conditions. Our results show that ferric salts can be alternative washing agents for Pb-contaminated soils in view of their extracting and oxidizing abilities.

Original language	English
Pages (from-to)	501-508
Number of pages	8
Journal	Chemosphere
Volume	185
DOIs	https://doi.org/10.1016/j.chemosphere.2017.07.046
State	Published - 2017

Keywords

EDTA
Ferric iron
Lead mineralogy
Shooting range soil
Soil remediation
Soil washing

Quacquarelli Symonds(QS) Subject Topics

Environmental Sciences
Medicine
Engineering - Petroleum
Chemistry

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10.1016/j.chemosphere.2017.07.046

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@article{d79fa4cf2ae34bf3a83c6f791a307f98,

title = "Effects of lead mineralogy on soil washing enhanced by ferric salts as extracting and oxidizing agents",

abstract = "In this study, we evaluated the feasibility of using ferric salts including FeCl3 and Fe(NO3)3 as extracting and oxidizing agents for a soil washing process to remediate Pb-contaminated soils. We treated various Pb minerals including PbO, PbCO3, Pb3(CO3)2(OH)2, PbSO4, PbS, and Pb5(PO4)3(OH) using ferric salts, and compared our results with those obtained using common washing agents of HCl, HNO3, disodium-ethylenediaminetetra-acetic acid (Na2-EDTA), and citric acid. The use of 50 mM Fe(NO3)3 extracted significantly more Pb (above 96\% extraction) from Pb minerals except PbSO4 (below 55\% extraction) compared to the other washing agents. In contrast, washing processes using FeCl3 and HCl were not effective for extraction from Pb minerals because of PbCl2 precipitation. Yet, the newly formed PbCl2 could be dissolved by subsequent wash with distilled water under acidic conditions. When applying our washing method to remediate field-contaminated soil from a shooting range that had high concentrations of Pb3(CO3)2(OH)2 and PbCO3, we extracted more Pb (approximately 99\% extraction) from the soil using 100 mM Fe(NO3)3 than other washing agents at the same process conditions. Our results show that ferric salts can be alternative washing agents for Pb-contaminated soils in view of their extracting and oxidizing abilities.",

keywords = "EDTA, Ferric iron, Lead mineralogy, Shooting range soil, Soil remediation, Soil washing",

author = "Yoo, \{Jong Chan\} and Park, \{Sang Min\} and Yoon, \{Geun Seok\} and Tsang, \{Daniel C.W.\} and Kitae Baek",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier Ltd",

year = "2017",

doi = "10.1016/j.chemosphere.2017.07.046",

language = "English",

volume = "185",

pages = "501--508",

journal = "Chemosphere",

issn = "0045-6535",

}

TY - JOUR

T1 - Effects of lead mineralogy on soil washing enhanced by ferric salts as extracting and oxidizing agents

AU - Yoo, Jong Chan

AU - Park, Sang Min

AU - Yoon, Geun Seok

AU - Tsang, Daniel C.W.

AU - Baek, Kitae

PY - 2017

Y1 - 2017

N2 - In this study, we evaluated the feasibility of using ferric salts including FeCl3 and Fe(NO3)3 as extracting and oxidizing agents for a soil washing process to remediate Pb-contaminated soils. We treated various Pb minerals including PbO, PbCO3, Pb3(CO3)2(OH)2, PbSO4, PbS, and Pb5(PO4)3(OH) using ferric salts, and compared our results with those obtained using common washing agents of HCl, HNO3, disodium-ethylenediaminetetra-acetic acid (Na2-EDTA), and citric acid. The use of 50 mM Fe(NO3)3 extracted significantly more Pb (above 96% extraction) from Pb minerals except PbSO4 (below 55% extraction) compared to the other washing agents. In contrast, washing processes using FeCl3 and HCl were not effective for extraction from Pb minerals because of PbCl2 precipitation. Yet, the newly formed PbCl2 could be dissolved by subsequent wash with distilled water under acidic conditions. When applying our washing method to remediate field-contaminated soil from a shooting range that had high concentrations of Pb3(CO3)2(OH)2 and PbCO3, we extracted more Pb (approximately 99% extraction) from the soil using 100 mM Fe(NO3)3 than other washing agents at the same process conditions. Our results show that ferric salts can be alternative washing agents for Pb-contaminated soils in view of their extracting and oxidizing abilities.

AB - In this study, we evaluated the feasibility of using ferric salts including FeCl3 and Fe(NO3)3 as extracting and oxidizing agents for a soil washing process to remediate Pb-contaminated soils. We treated various Pb minerals including PbO, PbCO3, Pb3(CO3)2(OH)2, PbSO4, PbS, and Pb5(PO4)3(OH) using ferric salts, and compared our results with those obtained using common washing agents of HCl, HNO3, disodium-ethylenediaminetetra-acetic acid (Na2-EDTA), and citric acid. The use of 50 mM Fe(NO3)3 extracted significantly more Pb (above 96% extraction) from Pb minerals except PbSO4 (below 55% extraction) compared to the other washing agents. In contrast, washing processes using FeCl3 and HCl were not effective for extraction from Pb minerals because of PbCl2 precipitation. Yet, the newly formed PbCl2 could be dissolved by subsequent wash with distilled water under acidic conditions. When applying our washing method to remediate field-contaminated soil from a shooting range that had high concentrations of Pb3(CO3)2(OH)2 and PbCO3, we extracted more Pb (approximately 99% extraction) from the soil using 100 mM Fe(NO3)3 than other washing agents at the same process conditions. Our results show that ferric salts can be alternative washing agents for Pb-contaminated soils in view of their extracting and oxidizing abilities.

KW - EDTA

KW - Ferric iron

KW - Lead mineralogy

KW - Shooting range soil

KW - Soil remediation

KW - Soil washing

UR - https://www.scopus.com/pages/publications/85023608030

U2 - 10.1016/j.chemosphere.2017.07.046

DO - 10.1016/j.chemosphere.2017.07.046

M3 - Journal article

C2 - 28715761

AN - SCOPUS:85023608030

SN - 0045-6535

VL - 185

SP - 501

EP - 508

JO - Chemosphere

JF - Chemosphere

ER -

Effects of lead mineralogy on soil washing enhanced by ferric salts as extracting and oxidizing agents

Abstract

Keywords

Quacquarelli Symonds(QS) Subject Topics

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