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 stopping sight distance on horizontal curve, Explain Stopping Sight...

Explain Stopping Sight Distance on Horizontal Curve Section Obstructions along the inside of curves can limit the available (chord) sight distance. A curve must be designed tha

Factors affecting location decision, Factors Affecting Location Decision: ...

Factors Affecting Location Decision:   Mining, quarrying and heavy manufacturing have capital intensive facilities that are costly to build and cover large area and use large q

Functions and desirable characteristics of pavements, Functions and Desirab...

Functions and Desirable Characteristics of Pavements Function of Pavement A pavement is that part of a road on which vehicles travel. The pavement has the following f

Highway pavement design, Explain the important factors affecting the design...

Explain the important factors affecting the design of pavement?

Define truss analysis-stability, Define Truss analysis-stability   ...

Define Truss analysis-stability   Identify whether a truss is determinate or indeterminate. Identify if the truss is stable or unstable   m = number of membe

M, symbols of electrical layout

symbols of electrical layout

Compare brick masonry versus stone masonry, Compare brick masonry versus st...

Compare brick masonry versus stone masonry advantage and disadvantage? Ans.- Comparison between Stone masonry and Brick masonry- Stone masonry Bri

Function of longitudinal joints in concrete road pavements, Question Wh...

Question What is function of longitudinal joints in concrete road pavements ? Answer A longitudinal joint consists of a tie bar located at mid-depth of a concrete pav

Human values, give the two aspects of honesty& explain

give the two aspects of honesty& explain

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