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.

01 February 2018 8,247 4 View

Why is it not possible to maintain the concentration of Mohr's salt solution after adjusting the pH?

Suppose I have prepared initial concentration of 10ppm(100 ml). After maintaining pH (2-6) by 1M NaOH and 1M HCl , it's original concentration decreases to a great extent, so what can be the...

31 December 2017 9,670 3 View

Why is it necessary to maintain pH before carrying out adsorption process?

Suppose we are preparing 30 ppm sample and then maintain its pH by 1M NaCl or 1M HCl. I have seen that the concentration of the sample reduces a lot after maintaining pH. So, what is the purpose...

11 December 2017 1,576 3 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?

06 July 2017 2,428 8 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...

05 June 2017 2,012 8 View

Is it possible to get (-ve) lactonic and carboxylic acid groups from Boehm titration of ZnCl2 activated carbon?

The Boehm titration of ZnCl2 activated carbon indicated basic sites of 0.525 mmol/g and 0.85 mmol/g phenolic groups with -0.19 mmol/g and -0.26 mmol/g lactonic and carboxylic groups. The total...

05 June 2017 4,818 1 View

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

04 May 2017 8,288 6 View

Can we use vacuum degassing method for expulsion of carbon dioxide in Boehm titration?

03 April 2017 590 1 View

Can zero point charge of activated carbon be determined by salt addition method ?

I want to determine the zero point charge of activated carbon. So which is the best suitable method for it and is it neccessary to degasify the solution while measuring the final pH in order to...

03 April 2017 8,672 3 View

How can I know whether a journal of Elsevier publication is Sci indexed or not ?

11 December 2016 9,893 4 View

How to quantify carbon deposition on CuZnAl catalyst?

Dear All, I want to quantify carbon deposition on the surface of the CuZnAl catalyst. I have tried thermogravimetric analysis, but I've got weight gain as the active Cu- get oxidised. Does anyone...

01 March 2021 1,907 3 View

Why Trivalent chromium start precipitating above PH 5 ? Moreover discuss difference between adsorption of chromium and precipitation of chromium ?

I am a student of MS Environmental Engineering and started my research phase. I am working on metal removal ( chromium iii ) by using activated carbon prepared from the agricultural feedstock. So...

01 March 2021 5,475 2 View

How can I assign a velocity along one direction to CO2 molecules in a molecular dynamics simulation using GROMACS?

Dear all, I am trying to perform a MD simulation about the interaction between CO2 and a polymer. I create my model, solvate it and perform the NVT and NPT equilibration. Now I am not able to...

26 February 2021 10,014 3 View

CGA 300 Regulator for CO2 cylinder?

Has anyone ever tried to deliver CO2 with a CGA 300 regulator? I know that a CGA 320 regulator is standard for CO2. The issue is that I currently do not have any free CGA 320 regulators. I also...

25 February 2021 3,292 3 View

How to model Supercritical water gasification (SCWG) process in Homer software?

Hi everyone How to model Supercritical water gasification (SCWG) process in Homer software?

25 February 2021 4,075 1 View

What are the methods used for CNT..?

Respected Professor's i hope you are doing well and happy. i need some information about carbon Nanotubes. before blending the CNT with the matrix the CNT has been introducing in some treatments....

24 February 2021 5,383 5 View

Is it possible to define biogas as a fuel in the reformer process(scwg) in Homer software?

Hi every one Is it possible to define biogas as a fuel in the reformer process(scwg) in Homer software? Biogas fuel is not available in the options thanks

23 February 2021 6,518 3 View

How to clean up TEM grid with plasma cleaner?

I need to clean the hydrocarbon contamination on the carbon substrate of TEM grid. However, I heard that substrate could be broken by the powerful plasma. My substrate is pure carbon, with ~3nm,...

23 February 2021 3,262 5 View

What are some underexplored theories and concepts in Activated Carbon as A Water Filter?

Hi, me and my team mates are currently planning to pursue the topic of Activated Carbon from Coconut as a Water Filter. And we would like to ask for your suggestions and knowledge on what specific...

22 February 2021 6,569 3 View

What are some underexplored theories and concepts in Activated Carbon as A Water Filter?

Hi, me and my team mates are currently planning to pursue the topic of Activated Carbon from Coconut as a Water Filter. And we would like to ask for your suggestions and knowledge on what specific...

21 February 2021 7,561 4 View