Accumulation characteristics and evaluation of heavy metals in soils and vegetables of plastic-covered sheds in typical red soil areas of China

The degree of pollution and potential ecological risk heavy metals (HMs) in the soil plastic-covered sheds Jiangxi Province were evaluated by Nemerow index index. bioconcentration factor total target hazard quotient (TTHQ) used to evaluate enrichment ability health HMs vegetables. mean contents arsenic (As), cadmium (Cd), chromium (Cr), mercury (Hg) lead (Pb) 5.99, 0.373, 17.8, 5.94E-02, 28.9 mg kg–1, respectively; Cd exceeded background value maximum limit. Most soils had no extremely strong risk. concentration Pb root veg-etables was 0.204 kg-1, with highest (0.147 kg–1) Ganzhou leafy Hg vegetables Jiujiang 1.41E-02 which negatively correlated pH (P ≤ 0.05). migration 1.7-fold that vegetables, strongest. TTHQ all less than 1.0, indicated there significant noncarcinogenic adults. highest, being major factors. In conclusion, fruit solanaceous may be more suitable for planting shed vegetables; identified as priority control under Province.