碩士 / 國立臺灣大學 / 生物環境系統工程學系暨研究所 / 91 / Many studies have investigated the arsenic concentration distributions in water and aquatic animals among aquacultural ecological systems of Blackfoot disease areas in Taiwan. In aquacultural ecological systems, sediments may accumulate high arsenic and influence the arsenic distributions in the whole system. The basic property of sediments and redox state of arsenic species may also affect the distribution of arsenic. This study sampled pond water, tilapia (Oreochromis mossambicus), hard clam (Meretrix lusoria) and sediments in aquacultural farms, and conducted isothermal sorption of batch experiments for different inorganic arsenic species in the sediments. The Langmuir, Freundlich and linear adsorption equations were adopted to describe the adsorption of inorganic arsenic and factors which may influence adsorbing capacity of sediments. A multi-compartmental model was applied to simulate the total arsenic concentration in tilapia and evaluated the effect of sediment on the total arsenic concentration distribution of tilapia in equilibrium. The results indicated that inorganic arsenic concentration in sediments from aquacultural farms is higher than that in pond water and aquatic animals. The inorganic arsenic in pond water predominantly existed in arsenate form and inorganic arsenic concentration in hard clam is higher than that in tilapia. Sediments in aquacultural farms significantly affected the arsenic distribution in aquacultural ecological systems.
| Identifer | oai:union.ndltd.org:TW/091NTU00404034 |
| Date | January 2003 |
| Creators | Sheng-Wei Wang, 王聖瑋 |
| Contributors | Chen-Wuing Liu, Yih-Chi Tan, 劉振宇, 譚義績 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 112 |
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