Which is the best flocculant I can use for sludge containing iron?

More Ramendra Pandey's questions See All

Does the heat transfer coefficient increase during coupled mass transfer? Is there any correlation which accounts for such a correction?

Standard Hausen's correlation for Nusselt number predicts heat transfer coefficient which are found to be lower than those measured experimentally in a pervaporation process. What could be the...

05 June 2018 1,466 3 View

Can liquid water saturation occur in a pore at RH<100 %? Does the pore need to be hydrophilic for liquid saturation?

I am asking this question in context with a two phase flow in porous media. Thanks!

02 March 2018 3,009 1 View

Can there be an order of magnitude or higher difference between in-plane and through-plane thermal conductivity of a porous polymeric matrix?

Would orientation of crystalline part of polymer lead to such huge difference in through-plane and in-plane thermal conductivity?

08 September 2017 1,886 6 View

What is the effect of temperature on water content of Nafion at 100 % RH?

Is there any study on Nafion which reports experimental study wherein temperature was varied at constant RH and the water content in the membrane was recorded.

05 June 2017 1,104 2 View

How is effective diffusivity in membranes related with the density ratio of membrane and the diffusing species?

What is the physical significance of introducing density ratio in estimation of effective diffusivity in membranes?

05 June 2016 4,911 2 View

Are the heat and mass transfer coefficients co-dependent on each other in a combined heat and mass transfer phenomenon such as humidification?

In a typical shell and tube membrane humidifier module, heat and moisture are exchanged between the wet and dry fluids flowing on either side of the membrane. Now, is there a correlation that...

11 December 2015 8,465 8 View

What is the minimum temperature attainable through passive cooling in an 'enclosed space'? Wet bulb temperature or dew point?

Say for example, A Zeer Pot system undergoes cooling due to evaporation of water. Now what would be the minimum temperature at the center of the Pot considering the top and bottom are perfectly...

03 April 2015 2,924 3 View

What theoretical or experimental techniques can be used to determine the different kinds of overpotentials in PEM fuel cells?

I have already carried out polarization studies and electrochemical impedance measurements but the trends obtained from both techniques do not match. Could there be another method which could give...

01 February 2015 507 3 View

Adhesion strength of coating?

How can I determine a good adhesion strength range for coatings on polymer surfaces, such as DLC on polymer substrates? Is there a specific threshold for adhesion strength (from T-peel tests)...

10 August 2024 942 3 View

How to increase simulation box size?

We intend to study the interaction between peptides and polymer (like PP, PE and PS) through MD simulations using Martini force fields ( Martini 2 for PP and Martini 3 for PE, PS). We have...

08 August 2024 4,842 0 View

How to heat polymer for about 130° without oil bath ?

is there any other way to heat a polymer evenly other than oil bath if so what are those and how to use it

06 August 2024 947 1 View

What is the ionic radius of Hydrogen anion? And how to know the exact ionic radii of the elements?

I'm trying to calculate the tolerance factors of the hydride perovskite and the value calculated by me and the reported values are contradictory. Need more clarity in using the correct ionic radii...

01 August 2024 2,614 1 View

How to explain the different interaction between soluble and insoluble polymer in water?

Hello everyone, I am try to understand the differences interaction between insoluble and soluble polymers in water with metal ions and how theit charge density (of metal ions) affect the interaction.

29 July 2024 6,350 3 View

Why is it not common to see similar pairs in polymer sliding pairs?

If the pairs are similar, will it reduce the adhesion due to electric charges?

29 July 2024 3,185 2 View

HAs anyone used TGA to find activation enegy of water evaporation?

I have different polymer solutions and I hypothesize that water molecules are retained based on the water-polymer interactions, so the amount of free water is less to intercat with drug tablet....

28 July 2024 9,545 6 View

Interpreting ATR-FTIR Spectra for Microplastics Research?

Hello everyone, I am currently pursuing a PhD in Environmental Engineering with a focus on microplastic studies. My background is in Civil Engineering, and I am relatively new to working with...

18 July 2024 7,258 3 View

How does surface energy affects the solidification of polymer?

Dear All, I would like to ask about the relation between the surface energy and solidification of polymer. If we apply a chemical treatment such as NaOh solution or silane treatment on the...

17 July 2024 190 3 View

I need to know the required time for VDF heating with water for 50-80°C for PVDF Polymerization in ?

i need to know the required time

15 July 2024 4,796 2 View

Abdelkader BOUAZIZ

Dear Ramendra Pandey, polyacrylamides are not so costly. You may explore the salting-out process to isolate them. My Regards

Doufnoune RACHIDA Rachida

You can use Ferric sulfate and Ferric Chloride.

Dr. Mamta Saiyad

Polyacrylamide based Cationic Polymer Flocculant should be used. However make sure to give pretreatment using coagulant to neutralize electrostatic charge. Biodegradable Cationic Polymer flocculants are also available.