Acknowledgements
The authors and publishers wish to thank the following for permission to use
copyright material:CRC Press, LLC for Table 11.6 from Environmental Chemistry, Fifth Edition, by
S. E. Manahan, Table 5.1, p. 94; Hutchinson Education for Figure 11.3 from
Surface Phenomena(1972) by S. R. Rao, Figure 27, p. 111; and McGraw-Hill
Publishers, New York, for Figure 14.9 from Chemistry for Environmental
Engineering, Fourth Edition, by C. Sawyer, P. McCarty and G. Parkin, Figure
6.2, p. 294.Photographs:
J. Allen Cash Ltd, pp. 78, 217, 250; Frances Arnold, p. 414; Chip Clark, p.18; Col-
orsport, p. 232; EMPICS, pp. 99, 173, 405, 410; Dr John Gray, pp. 428; Getty
Images/Hulton Archive, p. 165; Getty Images/Mansell Collection, pp. 27, 92,
213, 346, 353; Philip Harris Education, pp. 5, 286, 301; Laboratory of the Gov-
ernment Chemist, pp. 9, 147; Angharad and Catrin Lewis, p. 36; Lion Laborato-
ries Ltd, p. 106; Steve Redwood, p.185; Gordon Roberts Photography, pp. 88,
379; Science Museum/Science and Society Picture Library, p. 27; Science Photo
Library, p. 50; UKAEA, p. 30; University of California, p. 61; Valance (Dover
Publications
Ltd), p. 61; Varian (Australia Pty) Ltd, p. 373; Wolf Bass Wines International, p.
149.We thank the numerous reviewers and correspondents who have helped us
prepare this and previous editions. Special thanks are due to Dave Rich (for-
merly of Neath Port Talbot College) and Dr J. Carnduff (University of Glas-
gow).Every effort has been made to contact all the copyright holders but if any have
been inadvertently overlooked the publishers will be pleased to make the
necessary arrangements at the first opportunity.0230_000118_04_prexi.qxd 3/2/06 1:43 pm Page xiii