He made contributions to the field of Environmental Geochemistry which has facilitated our understanding of the metals-natural ligands interactions in natural and marine environments.
His research focuses on developing and applying a wide range of kinetic methods for chemical speciation in marine/estuarine sediment systems, each with its own characteristic timescale of measurement.
An important achievement of his research is to advance the science of metal speciation by identifying the analytical timescale of measurement as the critical parameter for defining the chemical species in coastal and marine sediment system.
The ability of the speciation techniques (multi-method approach) to provide a chemically significant description of the kinetics of metal-natural ligands interaction in sediment suggests that the metal and ligand exchange reactions precede mainly by the disjunctive mechanism (complete dissociation of ML), a fundamental process in coastal marine systems.
He has demonstrated the effects of Ligand Field Stabilization Energy, water exchange rate, Jahn Teller distortion of transition metals on their speciation and bioavailability in estuarine and coastal sediments.
He took the challenge to understand Hg-natural ligands interaction with an aim to reduce Hg pollution in marine systems.
He identified that sedimentary organic matter can be an important factor to control Hg distribution and their bioavailability in coastal marine systems.