Which among the following air pollutant is not present in an auto exhaust gas NOX CO CO₂ Peroxyacetyl Nitrate
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- Which among the following air pollutant is not present in an auto exhaust gas CO₂ NOX Peroxyacetyl Nitrate COWhich among the following air pollutant is not present in an auto exhaust gas О со O Peroxyacetyl Nitrate O NOX O CO₂Question 90/100 A trapezoidal section has a bottom width of 20 ft and side slope of inclination 1:1.5. Its friction factor f = 0.056. The depth of the channel is 4.0 ft. The channel slope is 0.025.Use C = √(8g/f) Compute the flowrate in cu.ft/s 1937 1370 2373 2062
- Question 10 Carbon monoxide emissions are the result of incomplete oxidation of O Carbon in the waste to CO2 O Hydrogen in the waste to CO2 O Nitrogen in the waste to CO, Fluorine in the waste to co2A treatment plant has been designed to achieve 99 percent inactivation of Giardia Lamblia using chlorine dioxide. The engineer used data on the disinfection of Giardia Lamblia at 20°C for the design, but the plant operates in a northern climate, and current estimates are that the low water temperature in some winters will be 0.5°C. Estimate the expansion required in the contact chamber in order to achieve the same inactivation at that temperature. You may assume complete mixing in the contact chamber and that the inactivation of Giardia Lamblia follows the Chick-Watson relationship. Ct values for achieving 90% inactivation of Giardia Lamblia (mg.min/L) Temperature (°C) 0.5 °C 5 °C 10 °C 15 °C Chlorine 0.97 0.63 0.48 0.32 dioxide * Note that the chick Watson's disinfection rate constant is a function of temperature. 20 °C 0.24 25 °C 0.16ENVIRONMENTAL ENGINEERING: WATER POLLUTION For a solution containing 200 mg of glycine [CH2(NH2)COOH] whose oxidation can be represented as: 2 CH2(NH2)COOH + 3 O2 ---> 4 CO2 + 2 H2O + 2 NH3 NH3 + 2 O2 ---> NO3- +H+ + H2O FIND: The theoretical CBOD The untimate NBOD The total theoretical BOD.
- You are being consulted for the design of a coagulation-flocculation basin for a water treatment plant. Ferric sulfate is available as a commercial coagulant and is popular at removing turbidity and color. The chemical reaction for its addition to water is: Fe2(SO4)3 + 3Ca(HCO3)2 ----> 2Fe(OH)3 (s) + 3CaSO4 + 6CO2Results of a jar test to determine the optimal coagulant dose are provided below. The initial water sample has a pH=6.5 and turbidity of 30 NTU. Ferric sulfate dose, mg/L: 5 10 15 20 25Turbudity, NTU: 15 5 1 0.9 2What is the optimal mass of ferric sulfate you would need to purchase every day to treat 106 gallons/day to a turbidity below 1 NTU (assume 100% purity of the coagulant).The second stage nitrification process is :presented by the following equation Nitrobacter 2NO2+ 02 -> 2NO3 Give the value of Oxygen Required for this ?stage in Ib / IbN oxidized إختر أحد الخيارات 4.57 .a O 1.0 .b O 1.14 .c O 3.43 .d OAluminum pieces inadvertently collect on the filter. a. If left on the filter, will the percent yield of the alum be reported as too high or as too low? Explain. b. If the aluminum pieces are detected on the filter, what steps would be used to remedy the observation? Explain.
- You are in a smoky room for three hours and the CO concentration is 45 ppm. What %COHb did you experience? What health effects would you expect at this %COHb?Disinfection by-products: why are they a problem, how are they formed, and how does a conventional filtration plant minimize their formation? Explain how (the dreaded chemistry) the addition of alum decreases alkalinity and tends to lower the pH of the treated water.A toxic pollutant with an initial concentration 598.08 is being treated in a batch reactor. Unfortunately, we were unable to as certain whether the substance degrades via first order or second order reaction. If the goal is to reduce the concentration by 95%, determine the number of days............... for 1 order deacy and the number of days ...............for 2nd order decay to reach the target effluent concentration: The reaction rate constant for the first and second order reaction are 0.5 d(-1) and 0.5x10(-3) mg(-1)d(-1) respectively.