Aluminium sulphate (alum) is added to water with a pH of 7.2. Based on the reaction...
Aluminium sulphate (alum) is added to water with a pH of 7.2.
Based on the reaction below, calculate the pH after alum is dosed
at 10 mg/L. Alum pKa = 3.3.
Al2(SO4)3 · 14H2O + 6H2O → 2Al(OH)3(s) + 6H+ + 3SO2− + 14H2 4
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Aluminium sulphate (alum) is added to water with a pH of 7.2.
Based on the reaction...
Aluminium sulfate (alum) is the most widely used aluminium-based coagulant in water and wastewater treatment. a)...
Aluminium sulfate (alum) is the most widely used aluminium-based
coagulant in water and wastewater treatment.
a) Briefly describe how alum
(Al2(SO4)3) addition assists in
water and wastewater treatment.
b) Draw a logC-pH diagram for the aluminium species at
equilibrium with Al(OH)3(s).
c) For the recipe [Al2(SO4)3] =
2 x 10-3 M, what are the pH and the composition of the
system, assuming equilibrium with Al(OH)3(s)?
d) For what total concentration(s) (minimum and/or maximum) of
Al2(SO4)3 is aluminium entirely
soluble?
Assume...
A treatment plant operator would like to estimate the maximum amount of coagulant, alum Al_2(SO_4)_3 14H20,...
A treatment plant operator would like to estimate the maximum amount of coagulant, alum Al_2(SO_4)_3 14H20, that she can add to the plant's source water (initial pH = 7.5 and initial ALK = 40 mg/L as CaCO_3) without causing the pH to drop below the minimum desirable pH value of 6.5. Assume that all added alum precipitates as Al(OH)_3(s) Al_2(SO_4)_3 14H2O rightarrow 2Al(OH)_3(s) + 3SO4^2- + 6H^+ + 8H_2O You can also assume that gas exchange during the various treatment...
A water treatment plant with an average flow of Q-1,0 m3/s treats its water with alum at a dose of 30 mg/L. A...
A water treatment plant with an average flow of Q-1,0 m3/s treats its water with alum at a dose of 30 mg/L. Alum coagulation is used to remove particulate matter, reduce the concentration of organic matter, and reduce the alkalinity of the water according to Equation 10-1. If the organic matter concentration is reduced from 10 mg/L to 2 mg/L. determine the total mass of Al(OH)3 removed per day O 708 kad 652 kg/d 674 O 720 kg • If...
You are assigned to operate a drinking water treatment plant which has a capacity of 280...
You are assigned to operate a drinking water treatment plant which has a capacity of 280 ML per day. The source water is from a river that contains a high concentration of dissolved organic carbon (DOC), (13 mg L-1) and has a high colour (60 HU) but where the alkalinity changes seasonally. In summer to winter the alkalinity is high (> 100 mg L-1 as CaCO3) and in spring after snow has melted in the mountains and the water flows...
Determine the alkalinity in mg/L CaCOs for DI water and tap water based on the number of digits (...
To pH of 8.3
To pH of 4.5
0
320
Alkalinity.
Wastewater Problem.
Determine the alkalinity in mg/L CaCOs for DI water and tap water based on the number of digits (digits= mg/L CaCO3 in 100 ml) Assuming that 25mg/L of filter alum [Al2(SO4)3-14.3 H2O] with MW-600 was used for coagulation, determine the total amount of alkalinity consumed in mg/L CaCOs from coagulation and flocculation. Is the amount of alkalinity consumed from coagulation less than, equal to, or greater than...
2. A dose of 41 mg/L of alum is used in coagulating a turbid water at...
2. A dose of 41 mg/L of alum is used in coagulating a turbid water at a water treatment plant treating a flow rate of 32 million gallons per day (mgd). The natural alkalinity of the source water is 10 mg/L (as CaCO3). a. Will the alkalinity be completely consumed in the reaction? If not, then how much alkalinity will be left? If so, then what concentration of caustic soda (NaOH) must be added to avoid a change in the...
Post La DUI LUI U UUDLUNS What is the biggest factor that causes vields of alum...
Post La DUI LUI U UUDLUNS What is the biggest factor that causes vields of alum in this experiment to be low? using too much Hasoy whold cause the yield to be in 2. A student reacted 1.01 g of Al with 25.0 mL of 2.00 M KOH according to the following reaction: 2Al(s) + 2KOH(aq) +6H2O(0) ► 2KAI(OH)4 + 3H2(g) a. How many moles of KOH were required to react with all of the aluminum? b. How many moles...
A water treatment plant operator treats 5 million gallons per day (MGD) of a raw surface...
A water treatment plant operator treats 5 million gallons per day (MGD) of a raw surface water with 25 mg/L of Aluminum Sulfate (Al2(SO4)3•16H2O) to remove suspended solids in the water. The untreated water contains 20mg/L total suspended solids (TSS). Assuming that the alum removes all but 2 mg/L TSS, determine the weight of sludge which must be removed each day. Assume: - All of the added aluminum sulfate is converted to its solid hydroxide form (Al(OH)3) and captured in...
How much calcium bicarbonate (kg/day) will need to be added per day in water with alkalinity...
How much calcium bicarbonate (kg/day) will need to be added per day in water with alkalinity of 30 mg/L CaCO3 (assume for simplicity only bicarbonate alkalinity is present) if 794 kg of Al2(SO4)3 x18H2O is added per week to treat water with coagulation/flocculation in a water treatment plant with capacity of 1 MGD. Consider the following coagulation/flocculation (unbalanced) reactions occur: Al3+ + HCO3– → Al(OH)3 + CO2
Synthesis of Alum (Potassium Aluminum Sulfate) from Aluminum Aluminum cans can be recycled to make potassium...
Synthesis of Alum (Potassium Aluminum Sulfate) from Aluminum Aluminum cans can be recycled to make potassium aluminum sulfate dodecahydrate, KAK(SO)12H20, which is abbreviated to "alum". The 12 waters are part of the overall formula. Alum can be used to make dyes, printing fabrics, making paper, adhesives, pickling of food and vets use it to induce a dog to throw up. x 1 rxn 2 run 3 The following are the four reactions that lead to alum: Al(s) + 2 KOH...
Aluminium sulfate (alum) is the most widely used aluminium-based
coagulant in water and wastewater treatment.
a) Briefly describe how alum
(Al2(SO4)3) addition assists in
water and wastewater treatment.
b) Draw a logC-pH diagram for the aluminium species at
equilibrium with Al(OH)3(s).
c) For the recipe [Al2(SO4)3] =
2 x 10-3 M, what are the pH and the composition of the
system, assuming equilibrium with Al(OH)3(s)?
d) For what total concentration(s) (minimum and/or maximum) of
Al2(SO4)3 is aluminium entirely
soluble?
Assume...
A treatment plant operator would like to estimate the maximum amount of coagulant, alum Al_2(SO_4)_3 14H20, that she can add to the plant's source water (initial pH = 7.5 and initial ALK = 40 mg/L as CaCO_3) without causing the pH to drop below the minimum desirable pH value of 6.5. Assume that all added alum precipitates as Al(OH)_3(s) Al_2(SO_4)_3 14H2O rightarrow 2Al(OH)_3(s) + 3SO4^2- + 6H^+ + 8H_2O You can also assume that gas exchange during the various treatment...
A water treatment plant with an average flow of Q-1,0 m3/s treats its water with alum at a dose of 30 mg/L. Alum coagulation is used to remove particulate matter, reduce the concentration of organic matter, and reduce the alkalinity of the water according to Equation 10-1. If the organic matter concentration is reduced from 10 mg/L to 2 mg/L. determine the total mass of Al(OH)3 removed per day O 708 kad 652 kg/d 674 O 720 kg • If...
To pH of 8.3
To pH of 4.5
0
320
Alkalinity.
Wastewater Problem.
Determine the alkalinity in mg/L CaCOs for DI water and tap water based on the number of digits (digits= mg/L CaCO3 in 100 ml) Assuming that 25mg/L of filter alum [Al2(SO4)3-14.3 H2O] with MW-600 was used for coagulation, determine the total amount of alkalinity consumed in mg/L CaCOs from coagulation and flocculation. Is the amount of alkalinity consumed from coagulation less than, equal to, or greater than...
2. A dose of 41 mg/L of alum is used in coagulating a turbid water at a water treatment plant treating a flow rate of 32 million gallons per day (mgd). The natural alkalinity of the source water is 10 mg/L (as CaCO3). a. Will the alkalinity be completely consumed in the reaction? If not, then how much alkalinity will be left? If so, then what concentration of caustic soda (NaOH) must be added to avoid a change in the...
Post La DUI LUI U UUDLUNS What is the biggest factor that causes vields of alum in this experiment to be low? using too much Hasoy whold cause the yield to be in 2. A student reacted 1.01 g of Al with 25.0 mL of 2.00 M KOH according to the following reaction: 2Al(s) + 2KOH(aq) +6H2O(0) ► 2KAI(OH)4 + 3H2(g) a. How many moles of KOH were required to react with all of the aluminum? b. How many moles...
Synthesis of Alum (Potassium Aluminum Sulfate) from Aluminum Aluminum cans can be recycled to make potassium aluminum sulfate dodecahydrate, KAK(SO)12H20, which is abbreviated to "alum". The 12 waters are part of the overall formula. Alum can be used to make dyes, printing fabrics, making paper, adhesives, pickling of food and vets use it to induce a dog to throw up. x 1 rxn 2 run 3 The following are the four reactions that lead to alum: Al(s) + 2 KOH...
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