Related Experiment Video
Updated: Apr 23, 2026

Experimental Column Setup for Studying Anaerobic Biogeochemical Interactions Between Iron OxyHydroxides, Trace Elements, and Bacteria
Published on: December 19, 2017
Kinetic speciation and bioavailability of copper and nickel in mangrove sediments
Parthasarathi Chakraborty1, Sucharita Chakraborty1, Darwin Ramteke1
1National Institute of Oceanography (CSIR), Dona Paula, Goa 403004, India.
Abstract:
An attempt was made to establish a mechanistic linkage between chemical speciation of copper and nickel, and their bioavailability in mangrove ecosystem. Kinetic speciation study was performed to determine the concentrations of labile metal-complexes and their dissociation rate constants in mangrove sediments. Concentrations of copper and nickel in the mangrove roots were used as indicators of their bioavailability. It was found that the bioaccumulation of both the metals gradually increased with the increasing concentrations of the labile metal complexes and their dissociation rate constants in the mangrove sediments. This study shows that concentration of labile metal (copper and nickel) complexes and their dissociation rate constants in mangrove sediment can be a good indicator of their bioavailability.
Related Concept Videos
Microbes and Other Elemental Cycles
Extraction: Advanced Methods
Microbial Leaching
Marine Microbial Ecology
Precipitation Gravimetry
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...
Speciation Rates

