Assessment of the properties of phosphogypsum in Vietnam

Abstract

In the world, phosphogypsum has been studied and used in many fields. Depending on the origin of phosphate ore and production technology, phosphogypsum quality varies widely. In this paper, the results of characterization of PG generated from 3 chemical and fertilizer factories in Vietnam will be presented. PG is evaluated for properties such as: identification of hazardous waste, calculation of radioactivity index, assessment of the ability to extract pollutants into the environment, assessment of chemical composition and physical and mechanical properties of PG. However, when testing the ability to release contaminated components in PG into the environment, it was found that PG in DAP 1, DAP 2 still had some components that could potentially have negative effects on the environment. Therefore, when using PG for purposes such as leveling materials, measures should be taken to treat or stabilize/cure these components before use.