Soil washing definition

Soil washing means an ex-situ process to mechanically scrub soil to remove contaminants. Soft particles are separated from soil in an aqueous-based system. The wash water may be augmented with leaching agents, surfactants, pH adjustment or chelating agents.
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Soil washing means the comingling of excavated soil with water (whether or not the water has been treated with a surfactant, pH adjuster or other chemical that increases its efficiency as a solvent) for the purposes of separating and removing contaminants from the soil.
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Soil washing usually means off-site remediation, and ‘soil flushing’ usually means on-site remediation. We use ‘soil washing’ to cover both in vitro and in situ techniques.
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Examples of Soil washing in a sentence

  • Soil washing, therefore, attempts to generate a clean sand and gravel fraction by removing any fines adhering to the larger soil particles and, if necessary, to transfer contaminants bound to the surface of the larger particles to the smaller soil particles.

  • Soil washing is the separation of soils into its constituent particles of gravel, sand, silt and clay.

  • Soil Washing (Physical and Gravity Separation) Soil washing is a proven technology and another lead reclamation method used by some reclaimers to separate the lead particles from Chapter III - Page III-14the soils.

  • Soil washing and separation system must include mixing, washing, [solids and liquid separation] [particle size separation] [ ], dewatering, stockpiling of treated materials, and measurement of process parameters and treated materials.

  • Soil washing is effective for the remediation of soils with a high content of material withEM 1110-35-11 July 2005 large particle sizes (more than 90% sand and gravel).

  • Soil washing can also be used for mixed wastes contaminated with organics or heavy metals.

  • Soil washing has been successfully demonstrated (pilot scale) on soils contaminated with strontium, cesium, technetium, radium, uranium, thorium, barium, and lead.

  • Soil washing has the potential to remove As from contaminated soils by using inorganic salts (potassium phosphate, potassium chloride, potassium nitrate, potassium sulphate or sodium perchlorate), inorganic acids (sulphuric acid, nitric acid, phosphoric acid, hydrochloric acid or mixed acid), organic acids (citric or acetic acids) or alkaline agent (e.g., sodium hydroxide) (Alam et al., 2001; Jackson and Miller, 2000; Tokunaga and Hakuta, 2002; Jang et al., 2005).

  • Soil washing refers to removal of heavy metal(loid)s from soil using various reagents and extractants (Guo et al., 2016; Park and Son, 2016) that can leach the heavy metal(loid)s from the soil.

  • Soil washing may be effective when there is an inverse relationship between particle size and contaminant concentration.

Related to Soil washing

  • Sewage sludge means a solid, semi-solid, or liquid residue generated during the treatment of domestic sewage in a treatment works as defined in section 6111.01 of the Revised Code. "Sewage sludge" includes, but is not limited to, scum or solids removed in primary, secondary, or advanced wastewater treatment processes. "Sewage sludge" does not include ash generated during the firing of sewage sludge in a sewage sludge incinerator, grit and screenings generated during preliminary treatment of domestic sewage in a treatment works, animal manure, residue generated during treatment of animal manure, or domestic septage.

  • Industrial waste means any liquid, gaseous, radioactive, or solid waste substance resulting from any process of industry, manufacturing, trade, or business or from the development of any natural resource.

  • Incineration means an engineered process involving burning or combustion of solid waste to thermally degrade waste materials at high temperatures;