Mehrdad Taheran

11 Questions 13 Answers 0 Followers

Questions related from Mehrdad Taheran

How to increase the yield of FeCl2 to FeSO4 conversion?

I have FeCl2 crystals and I want to produce FeSO4.7H2O based on the reaction below: FeCl2 + H2SO4 = FeSO4 + HCl I dissolved the FeCl2 crystal in water, added equivalent amount of H2SO4 to react...

22 March 2024 1,113 0 View

Is there any idea about concentration range of humic acid and fulvic acid in the effluent of conventional wastewater treatment plant?

I need to simulate the effect of natural organic matters (NOMs) on the performance of new technologies for tertiary treatment stage of wastewater treatment plants. Therefore I need the...

08 October 2017 6,935 3 View

How to cover the whole rotary drum collector by nanofibers during electrospinning?

I am using a rotary drum collector(diameter:10 cm and length:25 cm) to produce PAN nanofibers (Needle Gauge:22 and needle to center of collector distance: 16 cm). The problem is that in most...

18 April 2016 6,791 7 View

How to obtain a taylor cone in coaxial needle electrospinning?

I fabricated a coaxial needle with gauge 22 and gauge 16 and tried to make hollow nanofibers from PAN solution in DMac (10%) using mineral oil as sheath fluid. However, when I manipulated the...

22 March 2016 5,468 3 View

How to do the electrospinning of chitosan?

I know that electrospinning of chitosan is difficult due to high viscosity and surface tension of typical acetic acid solution. According to one paper, I reacted chitosan with methansulfonic acid,...

13 January 2016 3,013 10 View

How do I dissolve chitosan in DMF?

I want to produce electrospum fibers from PAN/Chitosan composite. The problem is that PAN is soluble in organic solvents like DMF but chitosan is not. I know that chitosan should be modified to be...

01 December 2015 7,838 3 View

Is there any expert in analyzing XRD of activated carbon?

I have two XRD pattern of biochar. one before activation (BC-M) and the other after activation (AC-M). Now I need help for interpretation. As I know, the structure of biochar before activation is...

29 November 2015 6,716 7 View

Where to buy affordable coaxial needles for electrospinning?

Does anybody know where I can buy affordable coaxial needles for electrospinning of PAN?

26 November 2015 8,941 4 View

Is it possible to use balls (that used in bearings) for ball milling?

I wonder if its possible to use the bearing balls in ball milling system. The material for grinding is charcoal and there is no problem with the hardness. But I want to know if there is any other...

18 October 2015 516 5 View

How can I calculate the stability constant of complexation reaction via potentiometry?

I am studying the complexation of tetracycline with metals through potentiometric titration of tetracycline with metal solution. The goal is the determination of stability constant: M + n(TC)=...

11 September 2015 4,023 8 View

Why isn't my ABTS radical stable?

I reacted ABTS with potassium persulfate. Within 10 min, I saw an increase in absorbance at 420 nm and after that it started to come back to baseline. I read somewhere that it is stable at least...

01 August 2015 5,672 9 View