COLLOIDS AND A SURFACES Ke elles Colloids and Surfaces ELSEVIER A: Physicochemical and Engineering Aspects 120 (1997) vii-—viii Contents of Volume 120 (Special Issue: Aquatic Colloid and Surface Chemistry) PATI <ocuntnttininnsnsscsrysiscinbistec ananrnniceti ticiitnsiiinneietoeeniajiautiainaase liattiae nsndaeiiln itittieesg lnati igtiiisi atsai iX Colloidal organic fibrils of acid polysaccharides in surface waters: electron-optical characteristics, activities and chemical estimates of abundance es I CI CIE Ci a encsicisinssaisesinitsrereersesisncsiebasenenaiieapnniesatistiticdinanitniinideitiesiiaeasitanbtesanancasilisninanstiinindialldbiniaies l Determination of thickness, aspect ratio and size distributions for platey particles using sedimentation field-flow fractionation and electron microscopy R. Beckett, D. Murphy, S. Tadjiki (Caulfield East, Vic. 3145, Australia), D.J. Chittleborough (Glen Osmond, S.A. 5064, Australia) and J.C. Giddings (Salt Lake City, UT, USA) .......ccccccccccsesesesesesesesesneseseessseneneneseensessesnsneesnsenenentess 17 Analytical applications of photon correlation spectroscopy for size distribution measurements of natural colloidal suspensions: capabilities and limitations M. Filella, J. Zhang, M.E. Newman and J. Bufflle (Geneva, SwitZerland) ..........cccceescssessessseeneeneneeneseenesneneenseneenenceneneneenes 27 Characterisation of River Po particles by sedimentation field-flow fractionation coupled to GFAAS and ICP-MS C. Contado, G. Blo, F. Fagioli, F. Dondi (Ferrara, Italy), R. Beckett (Caulfield East, Vic. 3145, Australia) ............. 47 Characterisation of particulate matter from the Kara Sea using electron probe X-ray micro analysis W. Jambers, A. Smeckens, R. Van Grieken (Antwerpen, Belgium), V. Shevchenko and V. Gordeev (Moscow, SIITTID-snsisicilconniniahlnl sieniehieeceiniecaaacinaaieaintiinianaiiulcohetcinsiiacsllicalieiictpeiliabehaniabldiaheniiadiabbainesieanieditpiieied s 61 Atomic force microscopy of soil and stream fulvic acids K. Namjesnik-Dejanovic and P. A. Maurice (Kent, OH, USA) .0....... ccc ceessssessssssssnsssecneseenssssscssenssssssnssssenssnsnesnensesensnesseees 77 Characterization of humic materials by flow field-flow fractionation i ne 87 Scaling invariance of the von Smoluchowski rate law Sa SD cn ciane cttsietncinicesiesniniiritneienccnnnemneccnepeniigiitincinaiiantiibiiimpnannneitmiaeciitiiiigiimiiinecinennitniitiiitiaies 101 Aggregation of iron colloids in estuaries: a heterogeneous kinetics study using continuous mixing of river and sea waters K.A. Hunter, M.R. Leonard (Dunedin, New Zealand), P.D. Carpenter (Melbourne, Vic., Australia) and RIES RS Ee EN NT TNT A ENE Y/N y eee 111 Effect of saline groundwater on the aggregation and settling of suspended particles in a turbid Australian river M.R. Grace, T.M. Hislop, B.T. Hart and R. Beckett (Caulfield East, Vic., Australia) .0.........cccccccscsssesseseseeneeteneneeneneeeenes 123 Reactivity at the mineral-water interface: dissolution and inhibition SE ire Ne NN eS Ee Ce Se OS a I ee ON a 143 The role of organic acids in mineral weathering ee Ne EI iain, CI, Fra ra, TIED ectcticteycatevssssssennincernscnninsssnitnccsrsinnicstsibnapabenieliiecnntinndilaanannsieansassinianeninantonines 167 Chemistry of riverine and estuarine suspended particles from the Ouse—Trent system, UK J.R. Ferreira, A.J. Lawlor, J.M. Bates, K.J. Clarke and E. Tipping (Cumbria, UK) wc cceccesesestsseseseeneseesnsneneneneens 183 Sorption of copper by suspended particulate matter eei s< G UE, TD, Tins UNE ne. SEUOED CPPUPUNN, REED, TAMIIOD caccsescornsevsscrensisostennsiinsvenatoneecsnanedentutiilnsdbenececentensetnasinenectinetnstinnesenepeieet 199 Sorption of trace metals (Cu, Pb, Zn) by suspended lake particles in artificial (0.005 M NaNO,) and natural (Esthwaite Water) freshwaters J. Hamilton-Taylor, L. Giusti, W. Davison, W. Tych and C.N. Hewitt (Lancaster, UK) .......ccccccescscesessesesenesesnenesneees 205 Metal- and proton-binding properties of a core-shell latex: interpretation in terms of colloid surface models J.H.A.M. Wonders, H.P. Van Leeuwen and J. Lyklema (Wageningen, The Netherlands) Contents of Vol. 120/Colloids Surfaces A: Physicochem. Eng. Aspects 120 ( 1997) vii—viii Influence of molar mass distribution on the complexation of heavy metals by humic material M.A.G.T. van den Hoop (Bilthoven, The Netherlands) and H.P. van Leeuwen (W ageningen, The Netherlands) .. 235 Modeling the adsorption of U( VI) onto animal chitin using coupled mass transfer and surface complexation J.J. Lenhart, L.A. Figueroa, B.D. Honeyman and D. Kaneko (Golden Colarado 80401, USA) w........c.ccecceeeeseseseeees 243 Interactions of thorium isotopes with colloidal organic matter in oceanic environments L. Guo, P.H. Santschi and M. Baskaran (Galveston, TX, USA) .................cccccccccssssssssssssssssssssescssssssscessesessessessesessesscsseseseeseees 255 Sa aici clah iiehnii ceihcnea cece hanipneheneenectiiiecetbenbipndeneaneinmneneseneabentitientenatdinennmnnen 273 ETRE ERR Ea IO ae nS ae eS SOE oe ee ne eT 275