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

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

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

Explain the well drawdown equations - ground water, Explain the Well Drawdo...

Explain the Well Drawdown Equations Watch the units, especially if you use log 10 or ln.    h 1 = aquifer thickness minus the drawdown (ft)  r 1 = distance from well (ft

Equllibrium, how to know about he sign convention for equllibrium forces

how to know about he sign convention for equllibrium forces

AUTOCAD, do you people deal with autocad

do you people deal with autocad

Define the thiem equations for confined aquifers, Define the Thiem Equation...

Define the Thiem Equations for Confined Aquifers   Using natural log:  Q = 2ΠKm(h 2 - h 1 )/ln(r 2 /r 1 )      m = aquifer thickness (ft) Using log 10 :   Q = 2Km(h 2 - h

Lateral load, http://www.expertsmind.com/questions/tributary-lateral-load-3...

http://www.expertsmind.com/questions/tributary-lateral-load-30133097.aspx

Bituminous courses, Bituminous Courses Types of Bituminous Courses ...

Bituminous Courses Types of Bituminous Courses The following are the various bituminous course commonly used : (a) Prime Coat (b) Tack Coat (c) Surface Dress

Explain the design criteria for sedimentation basin, Explain the Design Cri...

Explain the Design Criteria Sedimentation basin Surface Loading rate (or overflow rate), Vo = Q/A (flow rate/surface area) Detention time t or ? = V/Q (Volume /Flow rate)

Total volume of soil that excavated from the borrow area, Project specifica...

Project specifications require a relative compaction of 95% (modified Proctor).  Construction of a highway embankment requires 10,000-yd 3 of fill.  The borrow soil has an in-situ

Key role of drilling fluid in rotary drilling, Question What is key rol...

Question What is key role of drilling fluid in rotary drilling in site search? Answer Drill fluid in rotating serves two main reasons. (i) Facilitate rotation of

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