Significant different of green synthesized vs chemical synthesized nano-scale zero valent iron (nZVI)?

Please give differences in terms of characterization of particles and mechanism, reaction, products when it is used in treating contaminated water (like treatment for NO3, etc.). Cite or mention...

04 May 2019 8,169 2 View

Why do pH decrease and ORP increase during the reduction of nitrate using green synthesized nano zero valent iron (nZVI)?

When using green-synthesized nano scale zero valent iron (nZVI), pH was observed to turn to acidic condition and ORP becomes positve. What is the reason behind this?

04 May 2019 2,695 3 View

I need a help in designing a horizontal pressure leaf filter. Can I ask some advice and learning materials for me to be able to design it properly?

I'm going to filter Sodium silicate solution with some solids.

09 October 2018 3,239 0 View

What method/test shall I conduct to determine if Fe(II) and Cu(II) was reduced to Fe(0) and Cu(0)?

We're currently working in synthesizing Nano Scale Zero Valent Fe/Cu using green method. A plant extract was used as a reducing agent.

09 October 2018 2,175 3 View

What method/test shall I conduct to determine if Fe(II) and Cu(II) was reduced to Fe(0) and Cu(0)?

We're currently working in synthesizing Nano Scale Zero Valent Fe/Cu using green method. A plant extract was used as a reducing agent.

09 October 2018 9,403 6 View

What does it mean to have a negative concentration?

After getting a linear trend using the absorbance i get from different concentration of gallic acid, i use it to determine the concentration of extract i have using its absorbance but i get...

09 October 2018 2,675 0 View

Does the pressure(-600 mmHg) affects pH?

When I conducted the degassing experiment using decompression under anaerobic condition(and I used ferrous based chelating agent), the oxidized ferric were observerd. So, could you tell me the...

03 March 2021 4,892 5 View

What is the indication of the absence of peaks in Methanol electrooxidation CV curves ?

I have several question regarding the MOR; hope anyone help me better understand. 1- in CV using (KOH+MEOH) what is the indication of absence of the redox peaks? shouldn't they exist as a sign...

28 February 2021 4,851 8 View

Which transition metal salt precursor is best for doping? Why?

I would like to synthesize a transition metal doped TiO2 via solgel method. Hence, I would like to know which metal salt precursor to choose among Chloride, Nitrate, and Sulphate. A clear...

27 February 2021 4,285 3 View

Does different dilution factors affect negatively on NH3 reading ?

I have a sample of treated water sample & asked to obtain ammonia conc. in sample using a machine with 5-25 ppm detection range. However, upon testing with different dilution factors, all...

27 February 2021 8,483 3 View

Which database would give me this list of chemical components?

Dear colleagues: I would like to know if anyone knows of a database that gives me the parameters pH, K, K, Mg, P, C, N, Zn, Cu, Ni and Cd of common foods. I find a lot of information of proteins,...

26 February 2021 5,525 3 View

Why is NH4OH added in heavy metals limit test?

The limit test I'm referring to is USP method II. In this procedure you need to dropwise add 6N of NH4OH to the sample until it the pH is alkali. After that you need to dilute and add HOAc until...

23 February 2021 2,049 3 View

Is there an ideal incubation time of RGO-modified SPCE before subsequent use, i.e., electrochemical characterization or further modification?

I notice that upon washing and air-drying of my RGO/SPCE surface and characterizing again via DPV, the current response towards ferricyanide probe significantly decreases. My worry is that the...

22 February 2021 5,324 3 View

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22 February 2021 9,932 11 View

Can anyone help or comment on solubilising chlorobutanol in aqueous injections in minimum time possible?

Please suggest solubilisation of chlorobutanol in injections. Tried pH and high temperature. But the issue is of assay drop. If anyone can suggest any solution. Its a commonly used excipient for...

21 February 2021 7,397 1 View

What reaction will occur when adding hexamine into ammonium nitrate in an acidic medium?

Hello, I am investigating properties of water in oil emulsion explosives. And adding hexamine (hexamethylenetetramine) into one of the phases that are used to make the emulsion should increase the...

21 February 2021 8,680 1 View