ABSTRACT
This study investigates the remediation of low-level As contaminated excavated soils from construction projects by ZVI amendment followed by magnetic retrieval. A case study was conducted with an alkaline excavated soil (total As only 7.5 mg kg−1). The remediation efficiency was assessed using sequential leaching tests. The results showed ZVI amendment (1% ZVI and 0.5mLkg−1 H2SO4 of soil) followed by magnetic retrieval could significantly decrease water-leachable As (from 33 µg L−1 to <3 µg L−1), also the potential leachability of As in this excavated soil. These initial results indicate that this treatment could be developed for the efficient remediation of low-level As contaminated excavated soils.
