id	keyword
american_scientific_journal-1805	leaching
american_scientific_journal-1805	elements
american_scientific_journal-1805	results
american_scientific_journal-1805	trace
american_scientific_journal-1805	phosphogypsum
american_scientific_journal-1805	technology
american_scientific_journal-1805	behavior
american_scientific_journal-1805	engineering
american_scientific_journal-1805	concentrations
american_scientific_journal-1805	sciences