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

Process in terms of shrinkage of concrete, In bridge widening projects, mea...

In bridge widening projects, means of stitching is normally employed for connecting existing deck to a new deck. What are the problems that occur connected with this process in ter

ENGlLISH, Ask question #WHAT is presentation skill #

Ask question #WHAT is presentation skill #

Mosaic and p v c tiles, Q. Mosaic and P V C Tiles? The water sink at wa...

Q. Mosaic and P V C Tiles? The water sink at water points may be provided with mosaic lining at other than important station. Mosaic tiles also may be provided in flooring of

Grades of concrete, mixing ratio of different type of ready mix concrete.(R...

mixing ratio of different type of ready mix concrete.(RMC)

Explain horizontal circular curves - transportation, Explain Horizontal Cir...

Explain Horizontal Circular Curves - Transportation Horizontal circular curve is a circular arc between two straight lines known as tangents.

Residents building g+3, How analysis of residents building g+3 structure an...

How analysis of residents building g+3 structure analysisl

Reasons of ground heaving during pipe-jacking, Reasons of ground heaving du...

Reasons of ground heaving during pipe-jacking It is commonly recognized that ground settlement is one of the significant concern in pipe jacking operation. Though engineer mus

Test on specially moulded test piece, Test on specially moulded test piece ...

Test on specially moulded test piece The test piece shall be moulded by the manufacturer with identical compound and under identical vulcanizing conditions as used in manufact

Bronze is an alloy of materials, Bronze is an alloy of which materials? ...

Bronze is an alloy of which materials? Answer : Bronze is an alloy of copper.

Shear and tensile strength, What is the difference between shear and tensil...

What is the difference between shear and tensile strength? Ans) Tensile Strength for a Bolt is explained by applying a Force along it long axis. Shear Strength for a Bolt is exp

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