Shilpi Das

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Questions related from Shilpi Das

What is the correct procedure for production of Activated Biochar?

I have prepared biochar from a fruit seed. But I want to activate the biochar either by acid or base impregnation. So, is it necessary to a) Carbonize the impregnated biochar in a furnace for...

08 April 2024 1,500 6 View

How can I calculate the area of the the breakthrough curve using Origin software?

I have attached an example for reference. Kindly explain to me how can I compute the Area1 and Area 2 mentioned in the file using Origin software? Kindly reply.

02 February 2020 7,083 6 View

By which mechanism zinc chloride works as an activator in the preparation of activated carbon?

Activated carbon is prepared from lignocellulosic biomass using ZnCl2 as the activating agent. What is the possible reaction between zinc chloride and the biomass?

29 March 2018 9,335 4 View

How can I maintain pH of heavy metal solution using buffer?

For maintaing pH of heavy metal NaOH and HCl is added in a dropwise manner to the solution. But how can a buffer be used for maintaining the pH of the solution? Kindly give vivid explanation.

19 February 2018 7,485 4 View

Standard curve for ferric ion determination ?

1,10 phenanthroline method is used for the determination of ferrous ion because iron in the solution is reduced to ferrous state by boiling with hydrochloric acid and hydroxylamine. Similarly, in...

26 October 2017 7,193 5 View

Why is langmuir surface area always higher than BET surface area?

Langmuir corresponds to monolayer adsorption whereas BET denotes multilayer adsorption. So, what is the reason behind Langmuir surface area to be greater?

30 July 2017 354 7 View

What is the reason for the presence of a hysteresis loop in the Type I N2 adsorption-desorption isotherm?

The curve yielded the features of Type 1 isotherm but the adsorption capacity continues to increase with an increase in relative pressure. So is my assumption correct regarding the type of...

19 June 2017 6,627 6 View

What should be the zero point charge value of base impregnated activated carbon?

The activated carbon was prepared by impregnating zinc chloride with the raw sample. I have carried out zero point charge by salt addition method and obtained a value of 7.03. Is it correct?

07 May 2017 6,317 5 View

What is the range of pressure required for calculating micropore volume using N2 adsorption isotherm?

I have collected N2 adsorption isotherms using standard conditions at 77 K and up to 1 atm pressure for powdered form of agricultural waste. I want to calculate the micropore volume of these...

17 November 2016 1,619 10 View

What is the effect of activation time on iodine number of activated carbon?

After performing the experiment i have seen that in some cases iodine no increases with increase in activation time for a constant temperature as well as impregnation ratio but in some...

22 August 2016 6,791 3 View