Problem
Hexabromobenzene (HBB) is found along with flame-retardant materials such as in carpets, bedding, insulation, and furniture accessories. It is found as a contaminant in soils and sediments in our waterways. It has a structural formula of C6Br6, a molecular weight of 557.52, and a melting point of 327oC.
(a) Determine the log Kow of HBB using a group contribution method and a derivative method.
(b) From the data in (a) determine the aqueous solubility of BHH expressed in mol/L.
(c) From the above data determine the sediment-water partition constant Ksw using an appropriate correlation. The organic fraction of the soil is 0.05; neglect the mineral contribution to adsorption.
(d) Ten grams of soil with 10μg/kg of HBB are mixed with 100 mL of water and agitated for 24 h. The solution was allowed to reach equilibrium and the solid fraction separated. It was found to contain HBB at a concentration of 5μg/kg. What is the concentration of HBB in the water that was separated?
The response should include a reference list. Double-space, using Times New Roman 12 pnt font, one-inch margins, and APA style of writing and citations.