厦门湾颗粒活性污染物归宿的研究
Fate of particle-reactive pollutants in the Xiamen Bay
-
摘要: 采用条件分配系数Kd作为量度污染物颗粒活性强弱的基准,结合234Th-238U不平衡确定的颗粒物停留时间以及水体的停留时间,建立了一个简单的模型用于预测具有不同Kd值的污染物在厦门湾的归宿,该模型最终确定了某一污染物进入该海域后迁出至沉积物与离开该海域进入外海水之相对份额大小。污染物质的最终归宿通常依赖于其本身的化学性质、环境中的颗粒动力学性质及水动力作用,忽略其中任何一个因素都是不合适的。
-
关键词:
- 污染物 /
- 234Th/238U不平衡 /
- 模型预测
Abstract: A simple model is established to describe the fate of particle-reactive pollutants in the Xiamen Bay. Based on the conditional distribution coefficients (Kd) of chemicals and residence times of particle and waters, the model can be used to predict the fractions of pollutants which would be scavenged to sediments and would be escaped from the system. The model is calibrated using scavenging data derived from 234Th-238U disequilibria. The fate of a potential pollutant which will be scavenged is a function of the properties of the chemical, of the particle dynamics, and of the waters dynamics in the environment. It is inappropriate to overlook any factor.-
Key words:
- Pollutant /
- 234Th/238U disequilibria /
- model prediction
-
Goldberg E D. Marine Chemistry I. Chemical scavengers of the sea. J. Geology, 1954, 62, 259-265 Broecker W S, Kaufman A, Trier R M. The residence time of thorium in surface seawater and its implications regarding the fate of reactive pollutants. Earth Planet. Sci. Lett.,1973, 20, 35-44 Santachi P H, Adler D, Amduter M et al.Thorium isotopes as analogues for "particle-reactive" pollutants in coastal "marine environments. Earth Planet. Sci. Lett.,1980, 47, 327-335 Levenspiel O. Chemical Reaction Engineering (2nd ed.).Wiley, New York, 1972, 589 Adler D. Tracer studies in marine microcosms:transport processes near the sediment water interface. Dissertation for Ph. D.,Columbia Univ.,New York, 1981,346 Hinge K R. Seasonal predictions for pollutant scavenging in two coastal environments using a model calibration based upon thorium scavenging. Mar. Environ. Res.,1988, 26, 97-112 陈敏.真光层的顺拉动力学—234Th/238U不平衡的应用.厦门大学[博士论文],1996, 155 Pavlou S P, Dexter R N. Distribution of polychlorinated hiphenyls (PCB) in estuarine ecosystems, Testing the concept of equilibrium partitioning in the marine environment. Environ. Sci. Technol.,1979, 13, 65-70 Hinge K R, Adelman D, Pilson M E O. Radiolabelled butyltin studies in the MERL enclosed ecosystems. In:Oceans'87 Proceeding, Vol. 4, International Organotin Symposium, IEEE, New York, 1987, 1 416-1 419 Santschi P H,Amdurer M,Adler D et al. Relative mobility of radioactive trace elements across the sediment-water interface in the MERL model ecosystems of Narragansett. J. Mar. Res.,1987, 45, 1 007-1 048 Li Y H, Feely W H, Santschi P H. 238Th/228Ra radioactive disequilibrium in the New York Bight and its implications for coastal pollution. Earth Planet. Sci. Lett.,1979, 42, 13-26 谢永臻.南海及厦门邻近海域.同位素地球化学的研究.厦门大学[博士论文],1994, 91
点击查看大图
计量
- 文章访问数: 850
- HTML全文浏览量: 11
- PDF下载量: 781
- 被引次数: 0