Assertion: phosphoric acid's impurity | /r/HasProperty | extracted for example
Facets:
value: relatively easily
type: DEGREE
Source sentences:
text: The main problem is the slightly elevated radioactivity of phosphogypsum, which is due to the high activity concentration of 226Ra, while the remaining impurities can be extracted relatively easily, for example by using phase transformations between different kinds of calcium sulfate hydrate and filtering the obtained solution.