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 about the pot bearing - bridge bearing, Explain about the Pot Beari...

Explain about the Pot Bearing? POT bearing was developed in 1959 as an alternative to heavy steel sliding bearings. It consists of a circular non-reinforced rubber-pad fully en

Trusses, Determine the support reactions for the truss shown below

Determine the support reactions for the truss shown below

coursework (commercial management), Ask que1. Identify the risks involved ...

Ask que1. Identify the risks involved in this project related to cost in the perspective of the customer and analyse the probability of acceptance of such a project by customers. 2

What is the safe bearing capacity of wide strip footing, A loading test was...

A loading test was conducted with a 300 mm square plate at depth of 1 m under the ground surface in pure clay deposit. The water table is situated at a depth of 4 m below the groun

Determine the allowable bearing pressure of the sand, Two load tests were c...

Two load tests were conducted at a site-one with a 0.5 m square test plate and the other with a 1.0 m square test plate. For a settlement of 25 mm, the loads were found to be 60 kN

Designing of pipe jacking, Question While designing of pipe jacking , ...

Question While designing of pipe jacking , what particular areas on pipe joints have to engineers make sure of? Answer While in pipe jacking, jacked pipes may well ha

Describe the boussinesq theory, A raft of size 4 m-square carries a load of...

A raft of size 4 m-square carries a load of 200 kN/m 2 . Verify the vertical stress increment at a point 4 m below the centre of the loaded area using Boussinesq's theory. Compare

Ild and rolling load, how to solve ild and rolling load problem for shear f...

how to solve ild and rolling load problem for shear force and bending moment with the diagram.

Expansion joints in basement, I have building 50 m * 53 m 3 floors without ...

I have building 50 m * 53 m 3 floors without expansion joint in basement what are opinion please ? thanks

What is the long term effects - concrete, What is the Long Term Effects - C...

What is the Long Term Effects - Concrete Long term effects of  loads on structures consider all the effects including creep and shrinkage.

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