5. 關鍵議題- 底泥之移動性(Mobility)
化合物在基底的結合與遲滯作用
Binding/Retardation of Chemical on
Substrate
– Nature of Contaminant Chemical
• Organic
– Hydrophobic
– Polar
– Non-aqueous phase (oils)
• Inorganic
– Oxidation State
– Nature of Substrate
• Condensed – Organic/Inorganic
• Dispersed – Organic/Inorganic
生物累積與生物分解 Bioaccumulation
and Biodegradation
質量傳輸 Mass Transport
– Diffusion Coefficient
• Porous Media Characteristics
(Porosity/Tortuosity)
– Bioturbation
– Surface Mass Transfer Coefficient
– Advection
• Groundwater flow, Tidal Fluctuation
• Ebullition
Surface
Water
Bed Sediment
•Equilibrium Thermodynamics
•Uptake
•Adsorption/Desorption
6. 關鍵議題-底泥之移動性(Mobility)
化合物在基底的結合與遲滯
Binding/Retardation of Chemical on
Substrate
– Nature of Contaminant Chemical
• Organic
– Hydrophobic
– Polar
– Non-aqueous phase (oils)
• Inorganic
– Oxidation State
– Nature of Substrate
• Condensed – Organic/Inorganic
• Dispersed – Organic/Inorganic
生物累積與生物分解
Bioaccumulation and Biodegradation
– Microbial Population
– Rates of Degradation
質量傳輸 Mass Transport
– Diffusion Coefficient
• Porous Media Characteristics
(Porosity/Tortuosity)
– Bioturbation
– Surface Mass Transfer Coefficient
– Advection
• Groundwater flow, Tidal Fluctuation
• Ebullition
Surface
Water
Bed Sediment
7. 關鍵議題-底泥之移動性(Mobility)
化合物在基底的結合與遲滯作用
Binding/Retardation of Chemical on
Substrate
– Nature of Contaminant Chemical
• Organic
– Hydrophobic
– Polar
– Non-aqueous phase (oils)
• Inorganic
– Oxidation State
– Nature of Substrate
• Condensed – Organic/Inorganic
• Dispersed – Organic/Inorganic
生物累積與生物分解 Bioaccumulation
and Biodegradation
– Microbial Population
– Rates of Degradation
質量傳輸 Mass Transport
– Diffusion Coefficient
• Porous Media Characteristics
(Porosity/Tortuosity)
– Bioturbation
– Surface Mass Transfer Coefficient
– Advection
• Groundwater flow, Tidal Fluctuation
• Ebullition
Surface Water
Bed Sediment
Interfacial Mass Transfer
Bioturbation
Advection
Diffusion
26. Sediment toxicity testing intermittent renewal
system (STIR)
Water in
Enter each chamber Water out
Water tank
美國EPA及USGS標準
試驗設備
流水式生物毒性測試
適合短時間急毒性及長
時間慢性毒性測試
自動換水減少人力且不
會交叉污染
真正反映河川狀況