id	keyword
american_scientific_journal-2559	shrimp
american_scientific_journal-2559	shells
american_scientific_journal-2559	ions
american_scientific_journal-2559	shrimp shells
american_scientific_journal-2559	metal
american_scientific_journal-2559	extraction
american_scientific_journal-2559	volume
american_scientific_journal-2559	effect
american_scientific_journal-2559	figure
american_scientific_journal-2559	journal
american_scientific_journal-2559	technology
american_scientific_journal-2559	fe(iii
american_scientific_journal-2559	cd(ii
american_scientific_journal-2559	solution