15 Questions 8 Answers 0 Followers
Questions related from Hazel Anne Cledera
Most adsorption papers only discuss about the effect of coexisting ions such as (Na+, Cl-, NO3-, SO4 2- and PO4 3-) but were discussed in detail. I want to know how to exactly prepare these...
03 April 2025 6,446 5 View
I measured the absorbance of a compound and as usual, I autozeroed it before using. But I have observed that the autozeroed value when you remove the DI water UV cell from the equipment, it was...
18 January 2025 6,456 0 View
I made Zr-based MOF. One is normal, one is just functionalized with -NH2. After analysis, the Isotherm of the normal one is LANGMUIR, the one finctionalized with -NH2 is following FREUNDLICH. Is...
05 January 2025 3,898 3 View
Usually, conducting isotherm experiments in increasing concentration of PPCPs results in increasing adsorption of the adsorbent. But why mine is opposite? Does this mean I failed and have to...
11 December 2024 868 4 View
Hi! I actually want to know if there's a rule of thumb for sonicating nanomaterials. Sonicating for a long time might induce heat so I guess pulse mode is better. But the time to do it is often...
25 October 2024 8,900 1 View
I have synthesized MOFs already. However, I need to scale it up to produce 100g of MOFs. During my calculation, I need 15L of DMF just for this synthesis! So I thought, maybe DMF is just used as a...
02 July 2024 1,972 1 View
I have synthesized MOFs and been washing for about 2 weeks now until I reach the goal of UV absorbance of near 0.
28 May 2024 2,404 0 View
I usually wash it with MeOH by stirring (10 min.) then centrifuge at 8000rpm (10 min.) followed by DI water washing by stirring (10 min.) and then centrifuge again. I do it for 3x. The final one...
13 May 2024 8,906 0 View
After cleaning your biochar, do you use filtration using GF/F filter or do you use syringe to extract the filtrate and put it on cuvette and subject it to UV-VIS? Thank you!
30 March 2024 7,958 1 View
I am cleaning biochar with DI water. For me to prove that my biochar is already clean, I subject it to UV-Vis at 254 nm. Sometimes 274nm, 284nm. The result should be 0.00. But my prof said I...
20 March 2024 6,495 2 View
I have been cleaning my biochar for 4 days now! It's hard to make it 0.00 adsorbance in the UV-vis. Worse, it was at 0.019 already before but after cleaning again it became 0.038! I do not know...
10 March 2024 6,590 2 View
I asked because usually when I work with membranes, pre-compaction time is around 30-min to 1 hour and the membrane will become stable. I used DI water first and pristine membrane as the baseline....
23 February 2024 5,278 0 View
For salt rejection tests, the only thing that matters is the initial conductivity and final conductivity. However, I am having a hard time figuring out how to properly conduct this test. Some...
25 May 2023 3,351 0 View
I am curious about PSF membrane thickness range since I want to have a membrane that can withstand high pressures. Thank you in advance for your answers!
12 October 2022 1,023 4 View
Hello, dear, Researchers, I am a newbie in this membrane field.' I would like to ask if anyone of you has tried doing this? Can you share some methods / paper? Thank you very much!!!
01 January 1970 1,839 2 View
