Measurement of the different forms of zinc in Narragansett Bay water based on the rate of uptake by a chelating resin

摘要: Abstract Batch treatment with Chelex-100 ion exchange resin was used to quantify the physico-chemical forms of zinc in Narragansett Bay water samples collected on seven dates between November 1982 and January 1986. Labile complexes solution were rapidly taken up (100% uptake after 0.5 h); another two kinetically distinguishable components pool identified as ‘moderately labile’ organic ‘slowly particulate forms, respectively. The first component followed pseudo-first-order kinetics dissociation, whereas gave a removal plot that could best be described zero order. Although distribution these varied considerably sampling dates, rate constant characterizing release from each showed little variation season tidal phase (dissolved complex, k d = 0.36 ± 0.08 h −1 ; form, 0.12 0.04 nM ). One sample differed above analysis found conform surface binding site kinetic analysis, which first-order desorption ( 0.043 ) obtained. environmental implications findings are discussed.