Assessment of Soil Washing for Simultaneous Removal of Heavy Metals and Low-Level Petroleum Hydrocarbons Using Various Washing Solutions

Authors

Deok-Hyun Moon, Chosun University
Jae-Woo Park, Hanyang University
Agamemnon Koutsospyros, University of New HavenFollow
Kyung Hoon Cheong, Chosun University
Yoon-Young Chang, Kwangwoon University
Ki-Tae Baek, Chonbuk National University
Raehyun Jo, Chonham National University
Jeong-Hun Park, Chonham National University

Author URLs

Professor Koutsospyros's Faculty Profile

Document Type

Article

Publication Date

5-12-2016

Subject: LCSH

Soil remediation

Disciplines

Civil Engineering | Environmental Engineering

Abstract

Bench-scale soil washing experiments were conducted for simultaneous removal of heavy metals (Pb, Cu, Zn) and low-level petroleum hydrocarbon contaminants from soils. Various washing solutions including hydrochloric acid (HCl), nitric acid (HNO₃), sulfuric acid (H₂SO₄), tartaric acid (C₄H₆O₆) and ethylenediaminetetraacetic acid (C₁₀H₁₆N₂O₈, EDTA) were used. The concentration of the washing solutions ranged from 0.1 to 3M with a liquid-to-solid ratio of 10. The soil washing results showed that hydrochloric acid (HCl) was the best washing solution at 3M for heavy metal removal. Other washing solutions also showed a significant removal of heavy metals, except for sulfuric acid (H₂SO₄). Sulfuric acid (H₂SO₄) exhibited the worst performance among all washing solutions used with respect to Pb removal. 1M HCl and HNO₃were sufficient for effective Pb and Cu removal, and all of the tested washing solutions at a concentration of 0.1M produced results compliant with the Korean warning standard for Zn removal. In the case of total petroleum hydrocarbons (TPH), tartaric acid (C₄H₆O₆) produced the highest removals at all concentration levels compared with other washing solutions. More specifically, TPH removal efficiencies exceeded 33 and 82 % at the lowest (0.1M) and highest (3M) tartaric acid (TA) concentrations, respectively. Overall, TA could be a viable washing solution for the removal of both heavy metals (Pb, Cu, Zn) and TPH from contaminated soils.

Comments

This is a post-peer-review, pre-copyedit version of an article published in Environmental Earth Sciences. The final authenticated version is available online at: http://dx.doi.org/10.1007/s12665-016-5690-6.

DOI

10.1007/s12665-016-5690-6

Repository Citation

Moon, Deok-Hyun; Park, Jae-Woo; Koutsospyros, Agamemnon; Cheong, Kyung Hoon; Chang, Yoon-Young; Baek, Ki-Tae; Jo, Raehyun; and Park, Jeong-Hun, "Assessment of Soil Washing for Simultaneous Removal of Heavy Metals and Low-Level Petroleum Hydrocarbons Using Various Washing Solutions" (2016). Civil Engineering Faculty Publications. 38.
https://digitalcommons.newhaven.edu/civilengineering-facpubs/38

Publisher Citation

Moon, D. H., Park, J. W., Koutsospyros, A., Cheong, K. H., Chang, Y. Y., Baek, K., ... & Park, J. H. (2016). Assessment of soil washing for simultaneous removal of heavy metals and low-level petroleum hydrocarbons using various washing solutions. Environmental Earth Sciences, 75(10), 884.