This book covers the general principles of the occurrence, analysis, soil chemical behaviour and soil-plant-animal aspects of heavy metals and metalloids, followed by more detailed coverage of 21 elements: antimony, arsenic, barium, cadmium, chromium, cobalt, copper, gold, lead, manganese, mercury, molybdenum, nickel, selenium, silver, thallium, tin, tungsten, uranium, vanadium and zinc. This third edition of the book has been completely rewritten by mainly new authors and is now divided into three sections:  1: Basic Principles  2: Key Heavy Metals and Metalloids 3: Other Heavy Metals and Metalloids of Potential Environmental Significance  The scope has been widened with four new chapters in Section 1 dealing with toxicity in soil organisms, soil-plant relationships, heavy metals and metalloids as micronutrients for plants and/or animals, and the modelling of critical loads of heavy metals for use in risk assessment and environmental legislation. This book will be of great value to advanced undergraduate and postgraduate students, research scientists and professionals in environmental science, soil science, geochemistry, agronomy, environmental health and environmental engineering, including specialists responsible for the management and clean-up of contaminated land.