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.)

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

Show the continuous piezocone penetration test, Q. Show the Continuous Piez...

Q. Show the Continuous Piezocone Penetration Test? Continuous piezocone penetration test essentiallycomprises standard cone penetration test and a measurement of pore water pre

Significance of tailwater level in culverts, Significance of tailwater leve...

Significance of tailwater level in culverts Headwater level and tailwater level of culverts are significant parameters in hydraulic design. Headwater level can't be set too la

Tremie pipes are normally used with aid of hoppers, Question For underw...

Question For underwater concreting, tremie pipes are normally used with aid of hoppers. From time to time tubes are put in inside the hoppers and with reasons? Answer

Holes in steel plates connecting to H-piles, Q. Holes in steel plates conne...

Q. Holes in steel plates connecting to H-piles There are two types of holes present in the steel plate associated to H-piles in the pile cap. The first type of holes is design

Define the in-depth inspections for bridge, Define the In-depth inspections...

Define the In-depth inspections for Bridge? In-depth inspection is a detailed inspection of one or more members below the water level to detect any deficiencies not readily app

Classification of bricks based on their quality, Classification of Bricks B...

Classification of Bricks Based on their Quality The bricks used in construction are classified as following: First class bricks Second class bricks Third class bric

Distomat, Feactures and uses of distomat

Feactures and uses of distomat

Micro-organism ratio, Micro-organism ratio: Determine the F/M ratio (i...

Micro-organism ratio: Determine the F/M ratio (in units of lbs BOD5/lb MLSS-day) using data provided in the above example problem. Solution By definition, F/M = Q S

EARTH FILL dam, different components of all types of earth fill dam

different components of all types of earth fill dam

Mechanics of solids assignment, What will be the cost of Mechanics of solid...

What will be the cost of Mechanics of solids assignment consisting of 150 questions of 6 marks

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages