- Title
- Effectiveness of gravity based particle separation and soil washing for reduction of Pb in a clay loam shooting range soil
- Creator
- Sanderson, Peter; Thangavadivel, Kandasamy; Ranganathan, Srinvasan; Chadalavada, Sreenivasulu; Naidu, Ravi; Bowman, Mark
- Relation
- Environmental Technology & Innovation Vol. 16, Issue November 2019, no. 100480
- Publisher Link
- http://dx.doi.org/10.1016/j.eti.2019.100480
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2019
- Description
- 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.
- Subject
- soil; particles; treatment; removal
- Identifier
- http://hdl.handle.net/1959.13/1462344
- Identifier
- uon:46444
- Identifier
- ISSN:2352-1864
- Language
- eng
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