Assertion: lignin's effect | /r/HasProperty | observed for adsorption of methylene blue
Facets:
value: in a previous study
type: TEMPORAL
Source sentences:
text: The same effect was observed for adsorption of methylene blue by the silica–kraft lignin composite in a previous study, (26) which is additional confirmation of the statement that after immobilization on a solid surface, the kraft lignin gained higher accessibility of adsorption sites for ions and molecules adsorbed.