id	keyword
esrj-77869	soil
esrj-77869	adsorption
esrj-77869	et al
esrj-77869	solution
esrj-77869	são
esrj-77869	clay
esrj-77869	brazil
esrj-77869	langmuir
esrj-77869	surface
esrj-77869	tropical
esrj-77869	ribeira
esrj-77869	concentration
esrj-77869	cec
esrj-77869	capacity
esrj-77869	content
esrj-77869	environmental