Transport and Reactivity of Lactate-Modified Nanoscale Iron Particles in PCP-Contaminated Soils

Abstract

Remediation of sites contaminated by toxic chlorinated organic compounds by using nanoscale iron particles (NIP) has received great attention owing to their high reactivity resulting from small size and large reactive surface area. However, adequate delivery of NIP into the contaminated zones for in situ remediation applications is difficult because of NIP agglomeration and sedimentation. Different surface modifications of NIP are suggested to enhance the transport of NIP in soils. This study investigated the transport and remediation efficiency of bare NIP and lactate-modified NIP (LMNIP) in field sand contaminated with pentachlorophenol (PCP). Soil column experiments were conducted to investigate the reactivity and transport of NIP and LMNIP at different concentrations (1 and