Lecture 32 Organic Chemicals

Lecture 32 Organic Chemicals - Exam IV Exam IV will be...

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1 Exam IV Exam IV will be offered on Wed. Dec. 5 in class It will also be offered during the regularly scheduled time Thursday, December 13 th Study Guide will be posted this afternoon A toxic neighbor Gainesville Sun – November, 30 th Tests show arsenic and dioxins in the soil at levels exceeding state cleanup standards. 90-acre site contaminated with a mix of wood-treating chemicals Dioxin ½ life in soils: 10 – 30 years Organic Chemicals
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2 Dioxin PCB DDT insoluble 10-31 µg/L (50% Cl) 0.2 μg/L Principally carbon, hydrogen Organic Solvents Improving Solubility Improving Solubility Hexane Structural similarity between the chemical and the solvent. Soap/detergents Structural similarity between the chemical and the solvent. Lipids and Solubility
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3 Solubility A chemical’s solubility in lipids or organic solvents is inversely proportional to its solubility in water. Carbon/hydrogen (Carbon/hydrogen) water Consequences Consequences Bio-Accumulation Water and phytoplankton to zooplankton: 800 x Zooplankton to fish: 31 x Overall: 120,000 times original concentration Fish to eagle: 4.8x
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4 Smallmouth bass - 1100-1800 ppb Round gobies - 200-800 ppb
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Lecture 32 Organic Chemicals - Exam IV Exam IV will be...

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