Answer- The groundwater can be contaminated by two way mainly,
It is lot easier not to pollute groundwater than to clean it.
how can groundwater become contaminated? how can it become "cleaned up"
A building is to be cleaned up after being contaminated with an extremely persistent microbe at a cost of $300,000 (consider this a time=0 expense) The 100 workers will be vaccinated initially and then 10 will be vaccinated each year for five years, each vaccination costs $65 What is the annualized cost of clean up for a 30 year project period at 3% interest? 1. 59854 2. 11300 3. 13234 4. 14798 5. 15789
#3 Local groundwater has been contaminated with three industrial solvents. We wish to treat 1500 gpm of the water using air stripping in a column with 10 stages. What is vour recommendation for the required air flow rate (in SCFM) to produce water that meets EPA standards. Required data are given below Compound K-Value |Concentration in EPA Maximum Allowed Groundwater (ppm) Concentration (ppm 1.2-Dichloroethane Trichloroethylene 「·「·loroethane Also calculate the concentration of each of the organic species in the cleaned water....
Example: Groundwater A brownfield is contaminated with pollutants including PCBs. The water table declines in the direction of groundwater flow by 8 meters per 1000 meters. The soil has a hydraulic conductivity of 4.9 x 10-5 m/s, a porosity of 0.28, and a solids density of 2.1 kg/L. One PCB has a Kd in m/s? this soil of 18 L/kg. How fast does this PCB travel in this groundwater, in
Injection of potassium permanganate (KMnO4) into contaminated groundwater is sometimes used as a remediation strategy. The permanganate ion oxidizes the organic contaminant to CO2 and is converted into manganese dioxide (MnO2). Write the correct full redox reaction for the oxidation of vinyl chloride (H2C=CHCl) to CO2 by permanganate ion.
A site has groundwater contaminated with 1 mg/L hexavalent chromium, Cr(VI). A permeable reactive barrier (PRB) measuring 8 m × 8 m is placed across the path of the groundwater flow and loaded with 30 kg of iron metal Fe0 , which can reduce Cr(VI) to the much less toxic trivalent chromium, Cr(III), by this reaction: Cr(VI) + Fe0 → Cr(III) + Fe(III) In the direction of flow, the hydraulic head declines by 8 m per 1000 m. The soil...
Groundwater is contaminated with 300 μg/L (300 ppb) toluene. Assume the aquifer solids contain 1.5% organic carbon and that sorption is adequately described by a linear model. Estimate the mass of toluene sorbed to the solid material. Additional info: LogKow of Toluene= 2.69 Answer is 1.50 mg toluene per kg of soil. I do not know how to get to the answer. Please give full explanations, as I am getting a different answer.
Most chemicals can be cleaned up with a general spill kit, but a few chemicals require specialized spill procedures. For each substance listed, determine whether a general spill kit is sufficient or if a specialized spill kit is needed.
Question 4 A contaminated groundwater contains 60 ug/L (i.e., 0.060 mg/L) of ethylbenzene. You are pumping this groundwater out from your client's site, and have to treat it before it is discharged. You have decided to treat it by air stripping, which will volatilize the ethylbenzene and remove it from the water. Assuming this removal occurs as a single-step process, estimate the volume of air (in L) that needs to be contacted with every 1 L of water to lower...
9. ?Using the following figure, describe how BOD effects oxygen
concentration and fish.?
10.What is the difference between
an oligotrophic and eutrophic lake? What is anthropogenic
eutrophication?
11.How can groundwater become contaminated?
12.What can you do at home to reduce water pollution?
What role geoscientists play in locating and cleaning up contaminants in the soil and groundwater? What can we learn about the role geoscientists play in locating and cleaning up contaminants in the soil and groundwater? What was most interesting or most confusing about these resources?