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

Explain the term -tendon splices, Tendon splices Tendon splices are us...

Tendon splices Tendon splices are used to join tendons when continuous prestressed concrete , members require long tendons to achieve continuity. Several types of tendon splic

Define collisions - underwater inspection of bridge, Define Collisions - Un...

Define Collisions - Underwater Inspection of Bridge? Structural damage to underwater portions of a bridge can either be collision related or direct result of a collision. Colli

Aggragates, what are the classification og aggregates?

what are the classification og aggregates?

Upper bound of indirect tensile strength, Question While designing rese...

Question While designing reservoirs, indirect tensile strength of the concrete mix is particular to be less than a specific value such as 2.8N/mm2 for potable water. Why ought

Shear force and bending moment, how to draw load intensity and bending mome...

how to draw load intensity and bending moment diagram form a given shear force diagram

Abrasion test - tests on stones, Abrasion Test:   This test is carri...

Abrasion Test:   This test is carried out on stones used as aggregates for road construction. The test result shows the suitability of stones against   the grinding action u

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