A multi-method approach for the study of lanthanum speciation in coastal and estuarine sediments

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

“…The radio-frequency power was set at 1400 W. Plasma gas, auxiliary gas and carrier gas flows were 13, 0.7 and 0.87 l.min − 1 , respectively. The vivid description of operating condition of ICP-MS has been provided in our recent study (Chakraborty et al, 2011).…”

“…The approaches include batch techniques (Bermond et al, 1998;Bermond and Varrault, 2004;Carski and Sparks, 1987;Varrault et al 2001;Ghestem and Bermond, 1999;Langford and Gutzman, 1992;Yu and Klarup, 1994), flow techniques (Beauchemin et al, 2002;Davison et al, 2000;Jimoh et al, 2004), kinetic extraction methods Chakraborty et al, 2011;Chakraborty et al, 2012a;Chakraborty et al, 2012b), as well as in situ techniques such as Diffusive Gradients in Thin Films (DGT) (Bermond et al, 1998;Fangueiro et al, 2002;Town et al, 2009;Van der veeken et al, 2010). However, the kinetic extraction method is found to be cheaper, simpler and sensitive compared to the other methods.…”

Lead distribution in coastal and estuarine sediments around India

“…Scavenging property of Pb by Fe/Mn oxyhydroxide phase in sediment has also been identified as an important process in controlling speciation and geochemistry of Pb in sediments system (Jones and Turki, 1997;Tessier et al, 1979). Organic binding phase has been reported to control Pb distribution and its speciation in coastal sediment (Chakraborty et al, 2011(Chakraborty et al, , 2012aKrupadam et al, 2007). However, poor correlation between Pb and sedimentary organic matter (SOM) has also been reported by Abaychi and Douabul (1986).…”

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).…”