Abstract
This paper addressed potassium dehydrogen phosphate (KP) and acetic acid (OAc) amendments of neutral pH soil sampled from the lead contaminated soil in a shooting range to promote immobilization by modification of Pb speciation in solid and liquid phases. This study evaluated the amount of antimony leachability in the so il. The single KP application increased Pb and Sb leachabilitie s due to soil pH increase, wheres combined KP and OAc amendments decreased them in compar ison with the control. Sequential extraction analysis reveal ed that Pb residual fraction in KP amended soil increased to 72% than that in the control (5%). Th e residual fraction (82%) in KP an d OAc amended soil was higher than the single application of KP. This st udy indicated that combined appli catons of KP and OAc promoted Pb immobilization and suppressed Pb leachabilities.
