Safety risk analysis of high dosage of phosphogypsum in limestone soil and yellow soil: a case study of potted amaranth.

ABSTRACT: The safe management and sustainable utilization of phosphogypsum (PG) tailings in Guizhou, China, represent a pressing issue. High dosage incorporation of PG into karst soil has emerged as a promising approach. This method not only addresses the long-term storage issue of substantial PG tailings but also has the potential to enhance soil fertility. However, its safety risks to soil and food chain remain unclear. Through pot experiments, we incorporated 10-20% PG into limestone soil and yellow soil from the Karst region. The findings indicated significant increases in soil organic carbon (from 4.12% to 7.87%), and total salts (from 2.80 g/kg to 36.65 g/kg). Additionally, the concentration of potentially toxic elements (PTEs) in the soil did not exceed the established safety standards. The d

SUBMITTER: Wang X 

PROVIDER: S-EPMC12905139 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature