Speciation of Co, Ni and Cu in the coastal and estuarine sediments: Some fundamental characteristics

Distribution, Sources, and Possible Adverse Biological Effects of Trace Metals in Surface Sediments of a Tropical Estuary

“…Various approaches, including sequential extractions, kinetic extractions, adsorption/desorption studies, equilibrium partitioning models and in vitro digestive fluid extractions, have been used to understand the quality of sediments with respect to metals (Yu et al, 2000;Dahlin et al, 2002;Korfali and Davies, 2004;Zakir and Shikazono, 2008;Anirudhan et al, 2012;Chakraborty, 2012;Chakraborty et al, 2012aChakraborty et al, , 2012bHong et al, 2012). These techniques are useful for studying the fate, bioavailability, and toxicity of sediments.…”

Lead distribution in coastal and estuarine sediments around India

“…system. Quality and quantity of different metal binding ligands present in coastal sediments has been reported to control physicochemical forms of metals in the system (Chakraborty et al, 2015(Chakraborty et al, , 2014a(Chakraborty et al, ,b,c, 2012aChakraborty, 2012). In coastal sediments, Pb can be present in different physicochemical forms (water soluble and exchangeable Pb complexes; Pb associate with carbonates phase; Pb bound to oxyhydroxide of Fe and Mn; Pb bound to organic matter and sulphides, etc.).…”

Kinetic speciation and bioavailability of copper and nickel in mangrove sediments

“…The kinetic model proposed by Olson and Shuman (1985) was adapted (Chakraborty, 2012;Chakraborty et al, 2011Chakraborty et al, , 2012aChakraborty et al, , 2012bChakraborty et al, , 2013 to estimate kinetically distinguishable forms of Cu and Ni in the mangrove sediments. It is based on the assumption that each sediment sample consists of n different components, in which each component, M À sediment i , exists in equilibrium with its dissociation products: M 2+ or extractable M complexes, a naturally occurring heterogeneous complexant, sediment i .…”

“…The approaches include batch techniques (Beauchemin et al, 2002;Bermond and Varrault, 2004;Yu and Klarup, 1994), flow techniques (Beauchemin et al, 2002;Shiowatana et al, 1999;Silva et al, 2007), kinetic extraction methods (Chakraborty and Chakrabarti, 2006;Chakraborty et al, 2012aChakraborty et al, , 2012bChakraborty et al, , 2013Chakraborty et al, , 2011Chakraborty et al, , 2009, Diffusive Gradients in Thin Films technique Fangueiro et al, 2002;Town et al, 2009). However, the kinetic extraction method has been found to be a simple and sensitive technique (Chakraborty and Chakrabarti, 2006;Chakraborty, 2012).…”