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

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

Draw sketch for track in a cutting on a mainline route, Q. Draw a neat dim...

Q. Draw a neat dimensioned cross-sectional sketches of a - i. New single Line B.G. track in a cutting on a mainline route. ii. New double Line B. G. track on a trunk route ha

Designing of corbel beams in a pump station, Question In designing of ...

Question In designing of corbel beams in a pump station , why are shear links designed in top 2/3 of section? What is general advice on designing? Answer Corbel

Analytical methods for pollutants under the clean water act, Analytical Met...

Analytical Methods for Pollutants Regulated Under the Clean Water Act? We suppose that you have knowledge of and access to the relevant analytical methods. These methods cover

Graphics, 1. Draw the projections of a line AB that is 50 mm long and is pa...

1. Draw the projections of a line AB that is 50 mm long and is parallel to both the HP and the VP. The line is 40 mm above the HP and 25 mm in front of the VP. 2. A line AB, 50 mm

Prime coat - road pavements, Prime Coat: A prime coat is the applicat...

Prime Coat: A prime coat is the application of a low viscosity binder, usually a bituminous emulsion, to a gravel, WBM or WMM surface, to enable the binder to fill up the voi

Serveying, Set out horizontal and vertical cintrol and small building for c...

Set out horizontal and vertical cintrol and small building for construction work?

Guiding considerations in planning, Guiding Considerations in Planning: ...

Guiding Considerations in Planning: The following factors have a bearing on planning water transport facilities : (a)        Availability adequate land to accommodate the

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