Remediation efficacy of Sedum plumbizincicola as affected by intercropping of landscape plants and oxalic acid in urban cadmium contaminated soil

Purpose Intercropping is a promising technique for remediation of soils contaminated with heavy metals. Organic acids can increase the availability of heavy metals in soil. Our aim was to assess the effect of oxalic acid as an activator for hyperaccumulator–landscape plant intercropping to efficiently restore contaminated soil with low cost.