HISTORICAL DEPOSITIONS OF DIOXINS AND FURANS IN LAGUNA de MIRAMAR, MEXICO
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چکیده
Introduction Thousands of chemical substances, including toxic, persistent, bioaccumulative substances (TPBS), are produced and used world-wide annually 1 . These volatile and semivolatile TPBS may be transported by air both in gaseous phase and adsorbed to atmospheric particles 2 prior to deposition in soil and water. Due to the grasshopper effect, TPBS released may evaporate in warmer climates and be transported, reaching the colder air of polar regions or high mountains, where they are eventually deposited on land or water thousands of miles away. TPBS deposited on land may also end up in water bodies due to erosion and transport of soil particles that accumulate as sediments in lakes and reservoirs.
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