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Particle sources and trace element reactivity in the Humber plume

Particle sources and trace element reactivity in the Humber plume Samples of suspended particulate matter (SPM) collected from the Humber Estuary had higher concentrations of particulate metals than SPM from Holderness coastal waters (U.K.). Characterised SPM from both sources was used in laboratory experiments involving the uptake of radiotracer109Cd,137Cs,54Mn and65Zn. Kinetic experiments, over five days, showed that the rate and extent of uptake was highly dependent on particle type, with109Cd,54Mn and65Zn being more reactive with Humber Estuary particles than those from Holderness and137Cs having the opposite trend. Adsorption experiments were also carried out on suspensions in which SPM from the Humber Estuary and Holderness coastal water were mixed in various proportions. These experiments revealed that Kd for65Zn increased linearly with the proportion of Humber SPM, Kd for137Cs decreased linearly with increase in Humber SPM and Kd for54Mn and109Cd displayed non-linear behaviour. The results of the study were used to develop an algorithm for predicting the partition coefficients in the Humber Plume based on the extent of particle mixing from the two source regions. The use of206/207Pb ratios in determining the extent of particle mixing is discussed, along with the application of the algorithm to the modelling of particulate trace metal behaviour in the Humber-Wash coastal zone. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Aquatic Ecology Springer Journals

Particle sources and trace element reactivity in the Humber plume

Millward, G.; Williams, M.; Clifton, R.
Aquatic Ecology , Volume 28 (4) – Feb 16, 2006
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References (19)

Publisher
Springer Journals
Copyright
Copyright
Subject
Life Sciences; Freshwater & Marine Ecology; Ecosystems
ISSN
1386-2588
eISSN
1573-5125
DOI
10.1007/BF02334205
Publisher site
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Abstract

Samples of suspended particulate matter (SPM) collected from the Humber Estuary had higher concentrations of particulate metals than SPM from Holderness coastal waters (U.K.). Characterised SPM from both sources was used in laboratory experiments involving the uptake of radiotracer109Cd,137Cs,54Mn and65Zn. Kinetic experiments, over five days, showed that the rate and extent of uptake was highly dependent on particle type, with109Cd,54Mn and65Zn being more reactive with Humber Estuary particles than those from Holderness and137Cs having the opposite trend. Adsorption experiments were also carried out on suspensions in which SPM from the Humber Estuary and Holderness coastal water were mixed in various proportions. These experiments revealed that Kd for65Zn increased linearly with the proportion of Humber SPM, Kd for137Cs decreased linearly with increase in Humber SPM and Kd for54Mn and109Cd displayed non-linear behaviour. The results of the study were used to develop an algorithm for predicting the partition coefficients in the Humber Plume based on the extent of particle mixing from the two source regions. The use of206/207Pb ratios in determining the extent of particle mixing is discussed, along with the application of the algorithm to the modelling of particulate trace metal behaviour in the Humber-Wash coastal zone.

Journal

Aquatic Ecology – Springer Journals

Published: Feb 16, 2006

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