when a cities drinking water is disinfected by chlorine , an undesired by -product chloroform (CHCL3)...
when a cities drinking water is disinfected by chlorine , an undesired by -product chloroform (CHCL3) can be formed. Assume a 73kg person drinks 2.7L/day of water over her/his lifetime. (70years) with a chloroform concentration of 2.98mg/l with a potency factor of 0.007(kg.day/mg). Determine the increased cancer risk for this person. Please give the answer to four decimal places.
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when a cities drinking water is disinfected by chlorine , an
undesired by -product chloroform (CHCL3)...
1. Chloroform (CHCl3) has a Drinking Water standard concentration of 0.10 mg/L . a. What is...
1. Chloroform (CHCl3) has a Drinking Water standard concentration of 0.10 mg/L . a. What is this concentration expressed as parts per million (ppm)? b. Typical consumption Risk Analysis assumes the average human drinks 2.2 L/day for 70 years. How many grams of CHCl3 would the average human consume during a lifetime at the Drinking Water standard concentration? 2. The Air Quality Standard for sulfur dioxide (SO2) is 0.04 ppm. Express this as mg/m3 at 1 atm and 25oC.
23. Calculate the ThOD for wastewater containing 40 mg/l. sucrose C.H0.1. (atomic weights: C: 12 H:1 0:16) a 192 b...
23. Calculate the ThOD for wastewater containing 40 mg/l. sucrose C.H0.1. (atomic weights: C: 12 H:1 0:16) a 192 b 180 40.0 42.7 d e 85.4 other, write you answer- 24. When drinking water is disinfected with chlorine, an undesired byproduct, chloroform (CHCb). may be formed. Suppose a 70-kg person drinks 2 L of water every day for 70 years with a chloroform concentration of 0.04 mg/L (the drinking water standard). Potency factor for chloroform- 6.1 x 10 (mg/kg-day) The...
Example Chloroform is sometimes formed incidentally in drinking water plants. Suppose a 70 kg person drinks...
Example Chloroform is sometimes formed incidentally in drinking water plants. Suppose a 70 kg person drinks 2 L of water per day from water with 0.10 mg/L chloroform. Find the upper bound cancer risk for this person, and estimate the number of extra deaths caused in a city of 500,000 with this exposure risk. How does this compare with the cancer risk in the US, which is 189/100,000/year?
1. The drinking water standard for tetrachloroethylene is 0.005 mg/L, The potency factor for tetrachloroethylene is...
1. The drinking water standard for tetrachloroethylene is 0.005 mg/L, The potency factor for tetrachloroethylene is 5.1*10^-2 (mg/kg-day)^-1. What lifetime risk would this pose? Assume 30 year exposure for 350 days per year. 2. •Suppose a 70-kg man is exposed to 0.1 mg/m3 o etrachloroethylene in the air at his workplace. If he inhales 1m3/hr, 8 hours per day, 5 days per week, 50 weeks per year, for 30 years, and if tetrachloroethylene has an absorption factor of 90 percent...
Chloroform (CHCI3) has a Drinking Water standard concentration of 0.10 mg/L What is this concentration expressed as par...
Chloroform (CHCI3) has a Drinking Water standard concentration of 0.10 mg/L What is this concentration expressed as parts per million (ppm)? Typical consumption Risk Analysis L/day for 70 years. How many grams of CHCI3 would the average human 1. a. b. assumes the average human drinks 2.2 during a lifetime at the Drinking Water standard concentration? consume Find the Volume of 1 mole of an ideal gas at 1.2 atm and 80°C 2. The Air Quality Standard for sulfur dioxide...
A 70-kg individual drinks 2 L/day of water containing 0.015 mg/L of tetrachloroethylene for 20 years....
A 70-kg individual drinks 2 L/day of water containing 0.015 mg/L of tetrachloroethylene for 20 years. (a) Find the hazard quotient for this exposure. (b) Find the cancer risk. (c) If the individual drinks this water for 30 years instead of just 20, recomputed the hazard quotient and the cancer risk. A man works in an Aluminum smelter for 10 years. The drinking water in the smelter contains 0.015 mg/L arsenic and 0.80 mg/L methylene chloride. His only exposure to...
The drinking water standard for tetrachloroethylene is 0.005 mg/L. The potency factor for tetrachloroethylene is 5.1*10^-2(mg/kg-day)-1....
The drinking water standard for tetrachloroethylene is 0.005 mg/L. The potency factor for tetrachloroethylene is 5.1*10^-2(mg/kg-day)-1. What lifetime risk would this pose? Assume 30 year exposure for 350 days per year
please help! 3) Practice tice problem 1. When drinking water treatment plants chlorinate water, the chlorine must remain in contact with the water for at least 30 minutes before being delivered to...
please help!
3) Practice tice problem 1. When drinking water treatment plants chlorinate water, the chlorine must remain in contact with the water for at least 30 minutes before being delivered to customers. A water plant operator wishes to know i his existing 10,000-gallon storage tank can provide this HRT. He does a wash-out tracer test with fluoride salt (conservative). The initial concentration is i2 mg/L and after an hour of feeding non-fluoridated water through the tank at 20 gpm,...
25 What is the What is the main mechanism of defects of absorption in patients with...
25 What is the What is the main mechanism of defects of absorption in patients with celiac disease? A too much mucus in colon B absence of mucus in ileum C absence of villi on the cells of small intestine Dulcer in jejunum 26 What method is used to evaluate electric activity of the heart? A tegnaplay ECG Cechocardiography 27 What type of bronchi is most sensitive for spastic influences? B doppler ultrasound D biopsy of myocardium A trachea C...
10. Write a one-page summary of the attached paper? INTRODUCTION Many problems can develop in activated...
10. Write a one-page summary of the attached paper? INTRODUCTION Many problems can develop in activated sludge operation that adversely affect effluent quality with origins in the engineering, hydraulic and microbiological components of the process. The real "heart" of the activated sludge system is the development and maintenance of a mixed microbial culture (activated sludge) that treats wastewater and which can be managed. One definition of a wastewater treatment plant operator is a "bug farmer", one who controls the aeration...
23. Calculate the ThOD for wastewater containing 40 mg/l. sucrose C.H0.1. (atomic weights: C: 12 H:1 0:16) a 192 b 180 40.0 42.7 d e 85.4 other, write you answer- 24. When drinking water is disinfected with chlorine, an undesired byproduct, chloroform (CHCb). may be formed. Suppose a 70-kg person drinks 2 L of water every day for 70 years with a chloroform concentration of 0.04 mg/L (the drinking water standard). Potency factor for chloroform- 6.1 x 10 (mg/kg-day) The...
Example Chloroform is sometimes formed incidentally in drinking water plants. Suppose a 70 kg person drinks 2 L of water per day from water with 0.10 mg/L chloroform. Find the upper bound cancer risk for this person, and estimate the number of extra deaths caused in a city of 500,000 with this exposure risk. How does this compare with the cancer risk in the US, which is 189/100,000/year?
Chloroform (CHCI3) has a Drinking Water standard concentration of 0.10 mg/L What is this concentration expressed as parts per million (ppm)? Typical consumption Risk Analysis L/day for 70 years. How many grams of CHCI3 would the average human 1. a. b. assumes the average human drinks 2.2 during a lifetime at the Drinking Water standard concentration? consume Find the Volume of 1 mole of an ideal gas at 1.2 atm and 80°C 2. The Air Quality Standard for sulfur dioxide...
A 70-kg individual drinks 2 L/day of water containing 0.015 mg/L of tetrachloroethylene for 20 years. (a) Find the hazard quotient for this exposure. (b) Find the cancer risk. (c) If the individual drinks this water for 30 years instead of just 20, recomputed the hazard quotient and the cancer risk. A man works in an Aluminum smelter for 10 years. The drinking water in the smelter contains 0.015 mg/L arsenic and 0.80 mg/L methylene chloride. His only exposure to...
please help!
3) Practice tice problem 1. When drinking water treatment plants chlorinate water, the chlorine must remain in contact with the water for at least 30 minutes before being delivered to customers. A water plant operator wishes to know i his existing 10,000-gallon storage tank can provide this HRT. He does a wash-out tracer test with fluoride salt (conservative). The initial concentration is i2 mg/L and after an hour of feeding non-fluoridated water through the tank at 20 gpm,...
25 What is the What is the main mechanism of defects of absorption in patients with celiac disease? A too much mucus in colon B absence of mucus in ileum C absence of villi on the cells of small intestine Dulcer in jejunum 26 What method is used to evaluate electric activity of the heart? A tegnaplay ECG Cechocardiography 27 What type of bronchi is most sensitive for spastic influences? B doppler ultrasound D biopsy of myocardium A trachea C...
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