Analysis of Trace Metal Humic Acid Interactions Using Counterion Condensation Theory Porasso, Rodolfo D. ; Benegas, Julio C. ; van den Hoop, Marc A. G. T. ; Paoletti, Sergio Abstract Publication: Environmental Science and Technology Pub Date: September 2002 DOI: 10.1021/es010201i Bibcode: 2002EnST...36.3815P