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- W3135958997 abstract "A total of 94 soil samples from different soil depths (0∼25 cm, 25∼50 cm) were collected of farmland soil around the plain of Beijing, and the concentrations of five heavy metal elements (Cd, Cr, Pb, As, and Hg) were measured using standard methods. The safety utilization evaluation method of heavy metals was based on three different evaluation methods. Then, the governance principles and specific management control strategy were determined in detail according to the core pollution source analysis of each safety grade zone. The results show that there are four different comprehensive safe utilization areas: safe, low-risk, medium-risk, and high-risk utilization. Among them, the study area was dominated by low-risk utilization areas, and the risk trend was gradually weakening from the center of the city to the periphery. Based on the characteristics of different security zones, this study puts on the governance principles of priority protection, long-term monitoring and moderate optimization, strengthens early warning, and cooperates with effective repair and priority governance. And then it puts forward practical control strategies according to the core pollution sources of each safety utilization zone. Our findings may provide a clear direction for rational utilization of land resources and renovation in the future." @default.
- W3135958997 created "2021-03-29" @default.
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- W3135958997 date "2021-03-24" @default.
- W3135958997 modified "2023-10-06" @default.
- W3135958997 title "Security Regional Division of Farmland Soil Heavy Metal Elements in North of the North China Plain" @default.
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- W3135958997 doi "https://doi.org/10.3389/fenvs.2021.639460" @default.
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