TY - JOUR
T1 - Removal of lead and other toxic metals in heavily contaminated soil using biodegradable chelators
T2 - GLDA, citric acid and ascorbic acid
AU - Thinh, Nguyen Van
AU - Osanai, Yasuhito
AU - Adachi, Tatsuro
AU - Vuong, Bui Thi Sinh
AU - Kitano, Ippei
AU - Chung, Nguyen Thuy
AU - Thai, Phong K.
N1 - Funding Information:
This research was funded by Vietnam National Foundation for Science and Technology Development (NAFOSTED) under grant number 105.08-2019.15. The authors also acknowledge the contribution from various Vietnamese and Japanese organisations to our research.
Funding Information:
This research was funded by Vietnam National Foundation for Science and Technology Development ( NAFOSTED ) under grant number 105.08-2019.15 . The authors also acknowledge the contribution from various Vietnamese and Japanese organisations to our research.
Publisher Copyright:
© 2020 Elsevier Ltd
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2021/1
Y1 - 2021/1
N2 - In this study, we investigated the level of contamination of agricultural soil near an old recycling lead smelter in Vietnam and proposed an effective treatment for the remediation of the soil. The analysis of soil samples using an ICP-MS method revealed that the soil in the area was heavily contaminated by heavy metals, especially lead (Pb) with concentrations in surface soil of >3000 μg g−1. High concentrations of metals, including Pb, copper (Cu) and zinc (Zn), were found in whole soil profile. The FE-EPMA and Laser-Raman spectrometer results suggested that iron minerals and carbon materials in the soil are the important hosts of the toxic metals. Subsequently, a series of washing experiment were performed on the soil using biodegradable chelators, including N, N-dicarboxymethyl glutamic acid tetrasodium salt (GLDA), ascorbic acid and citric acid. The results showed that the mixture of GLDA-ascorbic (100 mM: 100 mM) can be considered as a potential candidate for Pb and Zn removal, which removes approximately 90% of Pb and 70% of Zn. Meanwhile, a mixture of GLDA-citric would be preferred for Cu removal based on its greater extraction efficiency compared to other mixtures.
AB - In this study, we investigated the level of contamination of agricultural soil near an old recycling lead smelter in Vietnam and proposed an effective treatment for the remediation of the soil. The analysis of soil samples using an ICP-MS method revealed that the soil in the area was heavily contaminated by heavy metals, especially lead (Pb) with concentrations in surface soil of >3000 μg g−1. High concentrations of metals, including Pb, copper (Cu) and zinc (Zn), were found in whole soil profile. The FE-EPMA and Laser-Raman spectrometer results suggested that iron minerals and carbon materials in the soil are the important hosts of the toxic metals. Subsequently, a series of washing experiment were performed on the soil using biodegradable chelators, including N, N-dicarboxymethyl glutamic acid tetrasodium salt (GLDA), ascorbic acid and citric acid. The results showed that the mixture of GLDA-ascorbic (100 mM: 100 mM) can be considered as a potential candidate for Pb and Zn removal, which removes approximately 90% of Pb and 70% of Zn. Meanwhile, a mixture of GLDA-citric would be preferred for Cu removal based on its greater extraction efficiency compared to other mixtures.
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U2 - 10.1016/j.chemosphere.2020.127912
DO - 10.1016/j.chemosphere.2020.127912
M3 - Article
C2 - 33297011
AN - SCOPUS:85090033405
SN - 0045-6535
VL - 263
JO - Chemosphere
JF - Chemosphere
M1 - 127912
ER -