Organic ligand complexes

Metal/ligand complexes (such as Al[OH]2+, Cu-humate) and organic/ligand complexes tend to be mobile in groundwater. 

Verity PG, Villareal TA, Smayda TJ (1988) Ecological investigations of blooms of colonial Phaeocystis pouchetti - 1. Abundance, biochemical composition, and metabolic rates. J Plankton Res 10(2) 219-248 Watson SW, Novitsky TJ, Quinby HL, Valois FW (1977) Determination of bacterial number and biomass in the marine environment. Appl Environ Microbiol 33 940-946 Weaver RS, Kirchman DL, Hutchins DA (2003) Utilization of iron/organic ligand complexes by marine bacterioplank-ton. Aquat Microb Ecol 31 227-239 Weinbauer MG, Arrieta JM, Hemdl GJ (2003) Stimulation of viral infection of bacterioplankton during a mesoscale iron fertilization experiment in the Southern ocean. Geo-phys Res abstracts 5 12280... 

Choppin, GR. (1985) Thermodynamics of lanthanide-organic ligand complexes. Journal of the Less-Common Metals, 112, 193-205. 

Weaver, R. S., Kirchman, D. L., and Hutchins, D. A. (2003). Utilization of iron/organic ligand complexes by marine bacterioplankton. Aquat. Microh. Ecol. 31, 227-239. 

The first approach to combine proteins and metal catalysts was to covalently link a protein with a metal-organic ligand complex (for reviews see [4, 5]). For example, three research groups created hybrid hydrogenation catalysts by covalently attaching a phosphorus ligand to biotin, which binds tightly to the protein avidin. In 1978... 

The oxidation of Cr(lll) to Cr(Vl) has been reported in the water column overlying reduced sediment by Masscheleyn et al. (1992). Adsorption/precipitation reaction was slow enough to deter increase in Cr(Vl) in the water column spiked with 1 and 10 mg L Cr(lll). In this study, the majority of the Cr(lll) initially added to the water column was precipitated, but some remained in solution as Cr(lll)-organic ligand complex. The observed oxidation was as rapid with 12 and 57% of the 1 and 10 mg L added Cr(lll) being oxidized within 24 h. After 1 day, the Cr oxidation rate was exceeded by Cr(Vl) removal (adsorptive difference). Table 12.4 depicts the quantities of Cr(Vl) measured with time. 

Several reports concern the formation of organic ligand complexes of iron(iii). The variation of rate with ligand concentration in the reaction with mandelic acid > is interpreted as a pre-equilibrium ion-pair formation followed by dissociative complex formation within the ion-pair, rather than as simple 5 n2 formation. This interpretation is similar to that proffered for formation of malonate and oxalate complexes of chromium(iii) (see above). Rates of reaction of iron(iii) with a variety of phenols are all very similar, suggesting that iron(iii)-water bond breaking is rate determining here also. Sulphosalicylate reacts with FeOH + by the same rate-determining loss of water from the iron(m). Rates of formation of iron(iii) complexes with acetate, monochloroacetate, and propionate have been reported. ... 

Chapter 11 Metal Transport in Ore Fluids by Organic Ligand Complexation... 

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