2,4,6-三氯酚在模型水生生态系统中的归宿

测定了模型水生生态系统水、底泥中2.4,6-三氯酚(TCP)浓度随时间的变化值,以及TCP从水中挥发、光解、底泥吸附、解吸、微生物降解的速率常数.假设水中TCP的迁移和转化遵循—级速率过程,水中物质平衡能通过数学等式来描述,显示出室系统教学模型能粗略预测模型水生生态系统中TCP浓度随时间的变化.最后,应用该模型预测了排放到天津室外兼性塘中TCP的迁移、归宿,发现15d后出口水中TCP浓度已降低到入口水中浓度的10%

FATE OF 2, 4 ,6-TRICHLOROPHENOL IN THE MODEL AQUATIC ECOSYSTEM

The time-dependent changes in the concentration of 2,4, 6-trichlorophenol (TCP) in water , sediment were determined in the model aquatic ecosystem. The rate constants were determined in the laboratory for the volatilization of TCP from water , photolysis, sorption and desorption by sediment, microbial degradation. Assuming TCP transport and transformation follow a first-order rate process, the material balance in the water can be described by the mathematical equations. It was demonstrated that the concentration changes of TCP in the model aquatic ecosystem could be estimated roughly from the compartmental mathematical model. Finaly, apply this model to pre-dicte the transport and fate of TCP discharged into outdoor facultative ponds in Tianjin. It was found that TCP concentration in the effluent reduced to 10% concentration in the influent after 15 days. This study provides the predicting method for the environmental fate of organic pollutant in water by mathematical model.