[Chaste]

Hi all, I don't really know where this falls under. But my guess is that this fits it best.

Anyway a following question I have in mind:
Assume that a chemical, with a molecular weight of 150, is released at a rate of 300kg/day to a river, 100km upstream of the public water system. Estimate the initial partitioning of the chemical in the water, sediment and biota.

Data:
Water solubility:100ppm
Soil sorption coefficient:10,000
Organic solids concentration in suspended solids: 15ppm
River flow rate: 500 millions liters per day
Bioconcentration factor: 100,000
Biota loading: 100g per 1000 cubic metres.

Solution:
The ratio of concentrations in water, sediment and biota will be approximated: 1:10,000: 100,000
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My question is where did these ratios come from?

[Chaste]

http://www.google.com.sg/url?sa=t&rct=j&q=Assume+that+a+chemical%2C+with+a+molecular+weight+of+150%2C+is+released+at+a+rate+of+300kg%2Fday+to+a+river%2C+100km+upstream+of+the+public+water+system.+Estimate+the+initial+partitioning+of+the+chemical+in+the+water%2C+sediment+and+biota.++Data%3A+Water+solubility%3A100ppm+Soil+sorption+coefficient%3A10%2C000+Organic+solids+concentration+in+suspended+solids%3A+15ppm+River+flow+rate%3A+500+millions+liters+per+day+Bioconcentration+factor%3A+100%2C000+Biota+loading%3A+100g+per+1000+cubic+metre&source=web&cd=4&ved=0CDQQFjAD&url=http%3A%2F%2Fwww.cgrer.uiowa.edu%2Fpeople%2Fcarmichael%2Fdownloads%2FChap5final.PDF&ei=iS3WTvKUAYXxrQfd6KGWDg&usg=AFQjCNFvsxBNOBaVo11FUJAq45q31II97Q

reference from here.