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CASE STUDY OF TESTING HEAVY-PARTICLE CONCENTRATOR-AIDED REMEDIATION OF LEAD-CONTAMINATED RIFLE SHOOTING RANGE SOIL
Thangavadivel, K., S. Ranganathan, P. Sanderson, S. Chadalavada, R. Naidu, and M. Bowman.
Remediation Journal 28(3):67-74(2018)

Trials were conducted to optimize the parameters of a heavy-particle concentrator (HPC) for the remediation of Pb-contaminated soil stockpiles at the Mount Stuart training area in Townsville, Queensland, Australia. Treatments evaluated included orbital screening to separate soil particle size fractions, HPC, and a combination of orbital screen and HPC. Treatment efficiency as well as reduction in Pb and Australian Standard Leaching Procedure was considered. A combination of orbital screening, HPC, and phosphate-aided immobilization completely remediated the stockpiled material by reducing total Pb below the Australian health level (Recreational: < 600 mg/kg Pb). The optimized parameters of HPC at 4 tonnes per hour of the < 40 mm orbital screen feed fraction were inclination angle 4°, trommel speed 1,860 rpm, HPC belt speed 3.5 rpm, material distribution chute extension 100 mm, and water flow 480 L/min.



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