id	keyword
eurjchem-2620	metals
eurjchem-2620	periwinkle
eurjchem-2620	sediment
eurjchem-2620	risk
eurjchem-2620	health
eurjchem-2620	ibeno
eurjchem-2620	shrimp
eurjchem-2620	water
eurjchem-2620	akpan
eurjchem-2620	human
eurjchem-2620	state