Effectiveness of gravity based particle separation and soil washing for reduction of Pb in a clay loam shooting range soil

Sanderson, Peter and Thangavadivel, Kandasamy and Ranganathan, Srinivasan and Chadalavada, Sreenivasulu ORCID: https://orcid.org/0000-0002-5000-8313 and Naidu, Ravi and Bowman, Mark (2019) Effectiveness of gravity based particle separation and soil washing for reduction of Pb in a clay loam shooting range soil. Environmental Technology and Innovation, 16:100480. pp. 1-7.

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A heavy particle concentrator (HPC), which can separate heavy metal particles from soil based on density, was examined for remediation of shooting range soil contaminated with lead (Pb) from a military training area. Concentrations of Pb in the stockpiles ranged between 1403 and 4300 mg/kg. The soils had high clay and silt content and were found to have relatively high exchangeable Pb, between 238 and 1480 mg/kg. After initial treatment by HPC, total Pb in the soil was reduced by 28%–56%. The fine soil fraction (<250μm) was found to still have relatively high Pb after HPC treatment. A greater removal efficiency was achieved by passing contaminated soil through the HPC a second time. Scanning electron microscopy (SEM) analysis of the treated stockpile indicated Pb present in the soil sorbed on soil particles or as very fine discrete particles (<10 - 20μm) after initial HPC treatment. The addition of a chemical washing agent, ethylenediamine-N, N’-disuccinic acid (EDDS) was effective for removal of 68% of residual Pb after a single HPC treatment and may be considered for high clay soils.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 03 Mar 2022 22:57
Last Modified: 19 Jul 2022 00:57
Uncontrolled Keywords: Environmental contamination; Management-practices; Metal contaminants; Heavy-metals; Lead; Remediation; Removal; Bioavailability; Adsorption; Pollution
Fields of Research (2020): 40 ENGINEERING > 4011 Environmental engineering > 401106 Waste management, reduction, reuse and recycling
Identification Number or DOI: https://doi.org/10.1016/j.eti.2019.100480
URI: http://eprints.usq.edu.au/id/eprint/47327

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