A multi-method approach for the study of lanthanum speciation in coastal and estuarine sediments |
| |
| Authors: | Parthasarathi Chakraborty PV Raghunadh BabuVV Sarma |
| |
| Institution: | National Institute of Oceanography (CSIR), India, 176 Lawsons Bay Colony, Visakhapatnam, 530017, Andhra Pradesh, India |
| |
| Abstract: | Two independent analytical methods (sequential extraction and kinetic extraction methods) were applied in order to understand the distribution and speciation of La in the coastal and estuarine sediments from the central east coast of India. Sequential extraction study revealed that La was primarily present as inert complexes (~ 50–60% of the total La) in all the sediments. Amounts of ~ 20–30% of the total La in all the sediments were found to associate with the total organic carbon (TOC) in the sediments. The dissociation rate constants of La–sediment complexes obtained from kinetic extraction studies revealed that the concentration of thermodynamically weak complexes of La gradually increased with the increasing La/TOC ratio in the sediments. |
| |
| Keywords: | Lanthanum speciation Sequential extraction method Kinetic extraction method Lanthanum&ndash organic complexes Rare earth speciation sediments |
| 本文献已被 ScienceDirect 等数据库收录！ |
