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

Lime, what is stone lime shall lime and kankar lime

what is stone lime shall lime and kankar lime

Control reinforcement corrosion, Crack width limitation ( In many stand...

Crack width limitation ( In many standards and code of practice of numerous countries, allowable size of crack width is generally limited to less than 0.5mm for reinforced conc

What is the force exerted by the tacoma narrows bridge, The force exerted t...

The force exerted to the Tacoma narrows bridge was initially the wind resistance. The wind resistance cause the entire bridge to act as a system with forced vibration with damping.

Airpot, how to design a new airport

how to design a new airport

Co, compressive stenght assigments.

compressive stenght assigments.

Premix, how we can do good premix

how we can do good premix

Determine the diameter of the footing, A circular footing is resting on a s...

A circular footing is resting on a stiff saturated clay with qu = 250 kN/m 2 . The depth of foundation is 2 m. Verify the diameter of the footing if the column load is 600 kN. S

Engineering Graphics, Draw a parabola , height 40mm and bass 120mm using of...

Draw a parabola , height 40mm and bass 120mm using offset method

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