Influence of humic substances on the removal of pentachlorophenol by a biomimetic catalytic system with a water-soluble iron(III)-porphyrin complex - Aoyama, Masakazu.; Fukushima, Masami.; Ichikawa, Hiroyasu.; Kawasaki, Mikio.; Morimoto, Kengo.; Sawada, Akira.; Tatsumi, Kenji.