id	keyword
eurjchem-2451	clays
eurjchem-2451	mporokoso
eurjchem-2451	chingola
eurjchem-2451	chemistry
eurjchem-2451	surface
eurjchem-2451	journal
eurjchem-2451	white
eurjchem-2451	luangwa
eurjchem-2451	south
eurjchem-2451	european
eurjchem-2451	samples
eurjchem-2451	mambwe