有機物自水與廢水中揮發之回顧

Volatilization of Organic Compounds from Water or Wastewater

趙煥平(Huan-Ping Chao)

《界面科學會誌》 29卷3&4期 (2007/12) Pp. 149-159

https://doi.org/10.30020/JCCIS.200712.0003

摘要

傳統上以二層膜（two-film）理論估算有機物自水中揮發，此理論假設擴散為有機物傳送的主要依據，雖然擴散作用確實對有機物之揮發有非常重要之影響，但是對於有機物與水體的作用力改變或環境影響因子改變時，二層膜理論可能須經過適當修正才能夠符合實際狀況，本篇報告主要針對有機物自不同自然水體與廢水中的揮發文獻進行回顧，同時討論在文獻中所提及有機物在風速與液相攪拌等不同環境條件下之揮發模式，並以所發展之表面損失揮發模式解釋環境因子造成有機物揮發速率改變的原因與傳統的二層膜理論進行比較。

關鍵字

有機物 ； 揮發 ； 廢水 ； 二層膜理論 ； 表面損失揮發模式

並列摘要

Traditionally, the two-film model is used to estimate volatilization of an organic solute from water into air. In this theory it is assumed that chemicals pass through liquid film and gas film by molecular diffusion. Although molecular diffusion is a dominant mechanism of organic solutes emitting from natural water bodies, changes in the interaction of solutes relative to solution and environmental conditions might lead to a necessary modification on the two-film model. In this report, volatilization of organic solutes from waster and wastewater under various environmental conditions including liquid-mixing, air turbulence, and presence of surfactants in wastewater are reviewed. A new model, surface-depletion rate-limiting (SDRL) model, was developed in the previous investigation to address varieties in volatilization rates of solutes under different environmental conditions. The significant difference between two-film model and SDRL model was also discussed.

並列關鍵字

Organic solute ； Volatilization ； Wastewater ； Two-film model ； Surface-depletion rate-limiting (SDRL) model