• OLR (1987) 34 (11) 953

may be due to association with nonfilterable dis- solved organics and colloids. Other controlling factors include differential hydrocarbon sources, specific particle associations, and solubility. School of Oceanogr., Univ. of Washington, Seattle, WA 98195, USA.

87:6263 Taylor, A.H., 1987. Modelling contaminants in the

North Sea. Sci. wtal Environment, 63:45-67.

The problem of predicting the fate of contaminants discharged into the North Sea is reviewed. Methods that have been used in models are analysed and their limitations discussed. Attempts are currently being made to assess the eutrophication and toxicity levels resulting from discharges. Future studies require that chemical speciation and uptake by sediments be included to a greater extent. Techniques for express- ing these processes quantitatively are described. NERC Inst. for Mar. Environ. Res., Prospect Place, The Hoe, Plymouth PL1 3DH, UK.

87:6264 Vandelannoote, R., L. Van't Dack and R. Van

Grieken, 1987. Effects of alkaline aluminate waste dumping on seawater chemistry. Mar. environ. Res., 21(4):275-288. Dept. of Chem., Univ. of Antwerp, B-2610 Antwerp-Wilrijk, Belgium.

C280. Books, collections (general) 8'7:6265

Scozzafava, Andrea (chairman, organizing commit- tee) and K.J. Irgolic (editor), 1987. Environ- mental inorganic chemistry. Proceedings of the Second Workshop, Algarve, Portugal, 12-13 April 1985. Special issue. Sci. total Environment, 64(1-2):238pp; 16 papers.

This symposium focused on the interactions between organisms and inorganic, organometallic, and

organometalloid compounds. Seven papers deal with analytical methods (REE and trace element analysis, determination of inorganic and organic metal com- pounds, surface H20 pH measurement, and lan- thanides, U, and Th as simulators of transuranics in aquatic environments). Also included are source- sink studies on Hg and Tc; investigations of molecular structure, interactions, and complexation; pre- and post-operational nuclear power plant studies; and a model for combustion gas treatment. (gsb)

C290. Miscellaneous

87:6266 Kirwan, A.D. Jr. and L.R. Kump, 1987. Models of

geochemical systems from mixture theory: dif- fusion. Geochim. cosmochim. Acta, 51(5): 1219- 1226.

The approach here differs from previous diffusion studies in that both the conservation of mass and momentum for the component are considered. This avoids parameterizing the diffusive flux in the mass equation by Fick's law. When the momentum equation is included with the mass equation, the linear approximation for the space-time distribution of a solute in a binary system is the telegraph equation. This contrasts with the diffusion equation, which relies on introducing the Fick's law assump- tion into the conservation of mass equation for the solute. Solutions for both the diffusion and telegraph equation models are obtained and compared for the case of migration of a minor component into the seabed when the sediment-water interface concen- tration is a prescribed function of time. Although the stationary, steady state solutions of the telegraph and diffusion equations are identical, the former has a transient solution in which fluctuations propagate at finite speed. The Fickian assumption, in contrast, requires an infinite speed of propagation. Dept. of Mar. Sci., Univ. of So. Florida, St. Petersburg, FL 33701, USA.

D. SUBMARINE GEOLOGY AND GEOPHYSICS

DIO. Apparatus and methods

87:6267 Brekhovskikh, L.M., V.V. Krasnoborod'ko, V.Kh.

Kiriakov and V.G. Selivanov, 1987. Generation

of acoustic images of the seafioor with the help of multielement antennas. Dokl. Earth Sci. Sect. (a translation of Dokl. Akad. Nauk SSSR), 283(1- 6):193-196.