If a artisanal gold mine discharges 0.87 kg/day of mercury into a lake and the outlet stream discharge was measured at 1.6 m3/s with a steady state concentration of 5.2 ppb mercury. How do you calculate what is the percentage of the contaminant that is lost in the lake?

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A: To find the DO concentration in lake after 7 days

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A: q=0.01L/s C1=20g/l Co=0 Cp=5 ppb To find stream discharge

Q: If 50% of BOD is degraded in 3 days how much time (in days) is need to degrade 55% ?

A: BOD exerted is given by (L)L = L0e-kt0.5L0 = L0e-k×3Solve k =0.23

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Q: The value of the equivalent volume of 1100 gallons is . . m^3. 4.00 O 4.75 5.00 5.75 O other answer

A:

Landfills

The landfill is a site used for the disposal of waste materials. The landfill is a solid waste facility that is often known as a dumping ground. The image below shows a landfill site in Hawaii. Landfilling is the most ancient and common method used for the disposal of waste. For the landfill, a deep trench is constructed in an isolated place away from the city. The trench for landfills is designed properly after analyzing the total population and the waste generation per capita. The waste is dumped into the trench and after every layer of waste, a layer of soil is spread on the top of it.