Abstract:To study the distribution and enrichment characteristics of metal elements in fruits of Camellia oleifera and planting soil, the assessment of eight heavy metals (Pb, Cr, Cd, As, Hg, Ni, Cu and Zn) and its enrichment capacity were studied in main production areas of Zhejiang province during the maturity period. The results showed that the contents of all measured metals in the soils were lower than the risk screening values of GB 15618-2018. The levels of As, Ni and Cu in soils of Changshan County, and the levels of Pb, Cr and Fe in soils of Jiangshan County were significantly higher than the values in other areas. The single-factor pollution index of Cd in Changshan and Jiande soils were 0.93 and 0.81 respectively, which were at the pollution cordon. Cr, Ni, Cu and Zn were mainly found in the seed, and Hg was mainly found in shell, and Pb, Cd, As, Fe and Mn were mainly found in the green peel. The enrichment coefficients of Cu, Fe and Mn in seed are greater than 0.4, indicating its high absorption capacity of these metals, while enrichment coefficients of Ni, Zn less than 0.4, and enrichment coefficients of Pb, Cr, Cd, As, Hg, Ni, and Zn less than 0.1. The enrichment coefficients of Cu and Mn in shell are greater than 0.4, indicating its high absorption capacity of these metals, while enrichment coefficients of Fe less than 0.4, and enrichment coefficients of Pb, Cr, Cd, As, Hg, Ni, and Zn less than 0.1. The enrichment coefficients of Cu, Fe and Mn in the green peel were greater than 0.4, indicating its strong absorption capacity, while the enrichment coefficients of Pb, Cr, Cd, As, Hg, Ni and Zn were less than 0.1. The camellia oleifera fruit have middle enrichment ability of some transition metal (Cu, Fe, and Mn), and have week enrichment ability of Pb, Cr, Cd, As and Hg.
