Foreword (L. Pawlowski, W.J. Lacy). Modelling - A powerful tool in environmental management (S.E. Jørgensen). Characterization, distribution and dispersion of typical pollutants in an ecosystem (G. Ostacoli). A methodology for environmental radioactivity monitoring. First application to the Po River (northern Italy) (S. Malcevschi et al.). The impact of organosilicon compounds on the aquatic environment, according to international criteria (R. Firmin, A.L.J. Raum). Health effect of ash from coal gasification and interaction with cadmium in rats (T. Maljkovic et al.). Experimental evaluation of elution phenomena (G. Genon, F. Marchese). Removal of cadmium from aqueous solution using adsorptive bubble separation techniques (S.-D. Huang, T.-F. Wang). Recovery of heavy metals by crystallization in the pellet factor: a promising development (M. Scholler et al.). Removal of heavy metals from industrial wastewaters (S.T. Gashi et al.). Leaching of heavy metals from solid wastes in landfill site (M. Baldi et al.). Synthesis and characterization of cellulose xanthate chelating exchangers for heavy metal removal and recovery from wastewaters (G. Tiravanti et al.). Application of new adsorbents for removal of arsenic from drinking water (J. Hlavay et al.). Determination of alpha-emitting nuclides of thorium and uranium in soil and sediment samples (P. Spezzano, N. Silvestri). A new adsorbent for wastewater treatment (M. Korczak, J. Kurbiel). Modelling sorption and degradation of toxic and hazardous substances in ground water systems (C.G. Uchrin, T.E. Lewis). Development of a rational approach to trickling filter design (G.A. Holder, G. Vaughan). Treatability studies of textile wastewater (S.I. Abo-Elela et al.). The chemical regeneration and subsequent volatilization of exhausted activated carbon (R.J. Martin, W.J. Ng). Purification of wastewater from the beneficiation of pitchblend ores: removal of hazardous chemical and radioactive impurities (C. Feldman). Absorptivity of fibrous mats applied for removing spilt oil (J. Drelich et al.). Chemical precipitation of phosphate from sewage at low lime dosage (R. Ramadori et al.). Fouling in ultrafiltration of macromolecular solutions. The role of ionic environment (P. Masse et al.). Primary wastewater treatment optimization: an efficiency comparison of high rate interceptor plates (M. Falleni, G. Ugolini). Design of tubular membrane module for textile effluents treatment (K. Majewska-Novak et al.). The use of hydrogen peroxide for the control of air pollution (P.V. Deo). Monitoring ground water and soil contamination by remote fiber spectroscopy (S.M. Klainer et al.). Characterization of individual environmental particles (R. van Grieken et al.). Recovery, identification and determination of organic compounds in marine sediments (P.G. Desideri et al.). Reference materials and analytical techniques for marine trace metal analyses (R.E. Sturgeon, S.S. Berman). Determination of selenium in water samples by HPLC with fluorescent detection (H. Tanaka et al.). Radionuclide partitioning between water and suspended matter: comparison of different methodologies (G. Ciceri et al.). Photolytic formation of 2-methyl-4,5,6,7-tetrachlorobenzoxazole from pentachlorophenol in aqueous acetonitrile (G.G. Choudhury et al.). The site program - Superfund Innovative Technology Evaluation - new approaches to cleaning up hazardous waste sites (R.D. Hill). Company champions for waste reduction (J.S. Hirschhorn et al.).