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

NERNST EQUATION, HOW CAN I MAKE ASSIGNMENT ON THIS TOPIC

HOW CAN I MAKE ASSIGNMENT ON THIS TOPIC

Determine the term - lowering of stresses, Determine the term -  lowering ...

Determine the term -  lowering of stresses Due to creep of concrete, these compressive strains keep on increasing with time. it means that the length of the member keeps on red

Simple stresses and strains, Simple stresses and strains: In this simp...

Simple stresses and strains: In this simple stresses and strains you have learnt the concepts of stress, strain, elastic modulus and the primary concepts in application to ana

., WHAT IS PILE CORROSION

WHAT IS PILE CORROSION

Stairs, what are the basic reqiureents for stairs. explain the basic proced...

what are the basic reqiureents for stairs. explain the basic procedures for stair construction

STRUCTURAL MECHANICS, Define and explain Mohr’s theorem for finding slope a...

Define and explain Mohr’s theorem for finding slope and deflection.

Wall, picture of types of wall

picture of types of wall

What is rail lubricators, Q. What is Rail Lubricators? 1. P & M type of...

Q. What is Rail Lubricators? 1. P & M type of lubricators - These lubricators can be used for lubrication of FF rails as well as BH rails. 2. Elgi grease pump - Elgi Bucket

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