Water samples were collected from coastal region off southwestern Taiwan during two cruises in different seasons (October, 2008 and March, 2010). In order to provide information for trace elements in this region, this study investigated the distribution and partitioning of dissolved trace elements (Cd, Cu, Ni, Zn), and to relate the influences of complicated hydrological conditions to trace element distributions.
Fractionation of dissolved trace elements was applied by a one-step preconcentration technique which uses cationic and anionic exchange columns. Trace element fractions were separated to operationally defined reactive (Chelex-labile), organically complexed (anionic-organic), and stable (inert) species.
Distributions of trace elements from near-shore surface waters off southwestern Taiwan were mainly affected by temporally variable terrigenous inputs and hydrological conditions. The most significant sources of trace elements were from the Gao-Ping, Er-Ren, and Tseng-Wen Rivers. Some near-shore vertical profiles of trace elements and nutrients showed abnormal distributions that could be attributed to complicated currents in this region. Trace elements in waters at offshore stations in this study showed nutrient-type distributions, and that is similar to other open ocean vertical profiles, except for the upper layers, where terrestrial influences were pronounced in this study.
The major proportions of trace elements determined in this study were of the Chelex-labile fractions, indicating that they were reactive and bioavailable. There is a small part of inert fraction, and the proportions are different between inshore and offshore waters, with pronounced inert fractions in near-shore waters.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0822112-163926 |
| Date | 22 August 2012 |
| Creators | Sheu, Yen-Lin |
| Contributors | Kuo-Tung Jiann, Hung-Yu Chen, Hui-Ling Lin, Chin-Chang Hung, Liang-Saw Wen |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0822112-163926 |
| Rights | unrestricted, Copyright information available at source archive |
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