Define alum (aluminum sulfate) caogulation, Civil Engineering

Assignment Help:

Define Alum (aluminum sulfate) Caogulation

  • Purchased as dry or liquid alum { Al2(SO4)3,14 H2O}, MW 594 (other formulas with varying number of water molecules also used)
  • 48.8% alum and rest water
  • When alum is added to water containing alkalinity (pH 5.5 to 8.)

 

206_Define Alum (aluminum sulfate) Caogulation.png

  • Each mole of alum uses 6 moles of alkalinity (HCO-3) and produces 2 moles of aluminum hydroxide (solid precipitate) and 6 moles of CO2 which decreases the ph
  • However due to the presence of alkalinity pH won't lower drastically If there is not enough alkalinity, lime (either as CaO or Ca(OH)2 ) or soda ash (Na2CO3) can be added to prevent pH from lowering due to the coagulation reaction.

Related Discussions:- Define alum (aluminum sulfate) caogulation

Determine the crash rate - transportation, A five-mile long section of two-...

A five-mile long section of two-lane road has an AADT of 8,000.  There have been six crashes on this section of road during the past two years.  What is the crash rate? R sec

Explain box jig, Explain Box jig? a) The box jig is so named because of...

Explain Box jig? a) The box jig is so named because of its box shaped construction, closed from most of the sides. b) It is normally designed for those components having awk

How to determine the frequency of flood, Q. How to determine the frequency ...

Q. How to determine the frequency of flood? Flood frequency may be estimated preferably from flood records, if available, for a number of years or they may be based on rainfall

Whole barings, Ask question #Minexaple of wholeiwhole baring 100 words acce...

Ask question #Minexaple of wholeiwhole baring 100 words accepted#

Walls, partition walls

partition walls

Construction Planning, A contractor has both a 3-cy and a 5-cy shovel in th...

A contractor has both a 3-cy and a 5-cy shovel in the equipment fleet. Select the minimum size shovel that will excavate 450,000 bcy of common earth in a minimum of 120 working day

Do you mean by accelerated aging, Q. Do you mean by Accelerated Aging? ...

Q. Do you mean by Accelerated Aging? Accelerated ageing tests are conducted at elevated temperature of 100 o C to know the variation in hardness, UTS and elongation at break.

State the effect of shape on the bearing capacity, State the effect of shap...

State the effect of shape on the bearing capacity. Differentiate among safe bearing capacity and allowable soil pressure. Write critical notes on (i) foundations on black cot

Cone, if the diameter of the base remains constant by what factor should th...

if the diameter of the base remains constant by what factor should the altitude be multiplied to produce a cone with twice volume as the original

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd