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Atrazine is a herbicide widely used for corn and is a common groundwater pollutant in the corn-producing regions of the United States. The log Kow, for atrazine is 2.69. Calculate the fraction of total atrazine that will be adsorbed to the soil given that the soil has an organic carbon content of 2.5%. The bulk density of the soil is 1.25 g/cm3; this means that each cubic centimeter of soil (soil plus water) contains 1.25 g of soil particles. The porosity of the soil is 0.4.
Write the mass balance equation for a plug flow with a second order decaying substance,C. Solve for the steady state concentration of C as a function of the second order rate constant k, longitudinal distance x, mean velocity u, and the concentrat..
A falling head permeability test was carried out on a 15 cm long sample of silty clay. The diameter of the sample and the standpipe were 9.8 cm and 0.75 cm, respectively. The water level in the standpipe was observed to fall from 60 cm to 45 cm in 12..
A pile resists the tension developed by three stay cables for a major tent (Membrane) Structure. Assuming no bending is desired in the pile (no resultant horizontal component), what is the magnitude of the force S if the angle \thetaS = 30 degrees
Which party is commonly responsible for furnishing interior stair nosings and which party is responsible for furnishing exterior stair nosings? Which party will commonly set the exterior nosings?
Determine the stream function for parallel flow with a velocity V inclined at an angle α to the x-axis.
Find the dimensions of a rectangular concrete channel to carry a flow of 150 m3/s, with bottom slope 0.015, and mean velocity 10.2 m/s.
Aqueous sodium cyanide wastes at a metal processing industry are to be treated with chlorine and NaOH. Calculate the stoichiometric quantity of CL2 required daily to destroy the cyanide from 5 Kg of NaCN.
A mixture containing 45 wt% benzene and 55 wt% toluene is fed to a distillation column. An overhead stream of 95 wt% benzene is produced, and 8.0 % of the benzene fed to the column leaves in the bottom stream.
A fixed-bed carbon adsorption system consisting of two 3-foot-deep beds containing 6 x 16 mesh carbon operates at a superficial gas velocity of 60 ft/min
If a large pool of water was rotating the same speed as an amusement ride, how far would the surface of the water rise, between the where the chairs are hanging when the ride stopped- which is 15ft from the center support column, and where the chairs..
What is the runoff coefficient in a basin located near the middle of the climatic spectrum, with annual precipitation P = 32 in, ecosystem evapotranspiration ET = 22 in, and baseflow U = 3 in
Calculate the total head loss for water (25°C) flowing at 100 m3/hr. The total flow length is 250 meters and the pipe is 15-cm diameter cast iron pipe
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