Humic substances interaction with trace metal

The ability of humic substances to interact with trace metals and organic pollutants is well known for details the reader is referred to reviews by Schnitzer and Khan (1972), Jackson et al. (1978), and Mantoura (1981). In... 

Raspor, B., Nurnberg, H.W., Valenta, P. and Branica, M., 1984. Studies in seawater and lakewater on interactions of trace metals with humic substances isolated from marine and estuarine sediments. 11. Voltammetric investigations on trace metal complex formation in the dissolved phase. Mar. Chem., 15 231-249. 

In our work we concentrate on the interactions between di- and tri-valent metal radionuclides which enter estuarine and seawater in ionic forms and humic and fulvic acids of different origins. However, as humic substances react with metals, not only in dissolved but also in undissolved states, we report some data on the adsorption of trace metal radionuclides on suspended humic acids. 

The evaluation of interactions between trace metals and humic substances has received considerable attention. Evidence for strong complexation has been demonstrated under controlled experimental conditions. Howeveq the complexity of fulvic and hiunic compounds is often at odds with the amoiuit of information contained in the experimental data, thus making it very difficult to obtain a rigorous thermodynamic description of their complexing properties. 

Nature of Trace Metal Interactions with Humic Substances... 

UF membranes are generally believed not to retain ions. However, some authors have reported ion rejection (Kiichler and Miekeley (1994)). Cations, especially multivalent cations and trace metals do interact with humic substances (Klein eta/. (1990)) and these inorganics would consequently be retained... 

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