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

State the effect of friction for a straight tendon, State the effect of fri...

State the effect of friction for a straight tendon The length effect represents the effect of friction for a straight tendon due to slight imperfections of the duct. In practic

Calculate the concrete tensile strength, Calculate the concrete tensile str...

Calculate the concrete tensile strength A 6 in. by 12 in. concrete cylinder resisted a transverse force of 55,000-lbf, at 28 days, in a split tensile cylinder test. Calculate t

Building, individual wall methods benefits?

individual wall methods benefits?

State the location and spacing of borings, Location and spacing of borings ...

Location and spacing of borings The location, spacing of geophysical profiles, soundings and borings should be such that,  you will be in a position to accurately predict the

Fore bearing, find out the interior angleS with diagrame LINE AB, BC, CD, D...

find out the interior angleS with diagrame LINE AB, BC, CD, DE, EA Fore bearing 60''30" , 122'' , 46'' , 205''30" , 300''

Foundation, difference between raft and pile foundation question..

difference between raft and pile foundation question..

Steps to determine hydraulic horsepower for pump problems, Steps to determi...

Steps to determine the hydraulic horsepower (whp) for pump problems:  1) Determine (h A ) by rearranging the Bernoulli equation.    2) Apply (h A ) into the equation found i

Bending stress distribution diagram, i want to know how bending stress dist...

i want to know how bending stress distribution in c section

Calculate the surface dimensions of sedimentation tank, Calculate the surfa...

Calculate the surface dimensions of Sedimentation Tank A treatment plant upgrade calls for design of sedimentation basins to handle a flow rate of 8 MGD. The basins are for a T

Cantilever beam, The problem in the link below. ">http://www.expertsmind....

The problem in the link below. ">http://www.expertsmind.com/questions/plot-vertical-displacement-cantilever-beam-30134382.aspx#

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