Science Programme | A Discussion On Environmental Remediation

Añadido: 2026-06-04

[00:00:39]Environmental remediation techn expert Dr. David Professor Department of Basic Science Manipur Technical University.

[00:01:09]Thank you.

[00:01:20]Thank you.

[00:01:33]Environmental remediation.

[00:01:44]Environmental remediation.

[00:02:01]populationations.

[00:02:21]generally remediations.

[00:02:40]Ultimately, water remediations topics community lines.

[00:03:34]environment remediation classing Catholic school then class 11 and 12 ishore school VAC honors physics Hindu college university of Delhi Mhm. Masters Department of Physics and Astrophysics University of Delhi Master PhD under the supervision of Professor During my PhD composite absorb sunlight ultraviolet right absorb infrared during my PhD.

[00:05:02]Yes.

[00:05:08]Because light has different 400 to 700 nanome starting from Mhm.

[00:05:24]Renewable.

[00:05:46]So after that PhD way back in 2019, >> Mhm. China University I got one postdoctoral position I postal position college of material science and engineering university so I stayed there for almost two and a half years I have already known that my material absorbs visible Okay.

[00:06:32]educational journey up to postdoal after that two and a half years later after that came so I have to return back to and I got a position as an assistant professor in MTOIC journeys.

[00:06:57]So coming back to the topic environmental remediations.

[00:07:02]environment.

[00:07:09]Yes.

[00:07:23]Utantateral waste industry.

[00:07:55]number one. Number two, suspended particles just like even microplastics will be there.

[00:08:07]>> Germs. The most important thing is germs.

[00:08:10]>> Germs, virus, bacteria, fungi, germs.

[00:08:15]with the antibiotics because hospital Not only for human health but also for animals and plants organic partic in a way by using chemical reaction. Mhm.

[00:09:26]Very promising materialized we can make it in different shapes.

[00:09:38]>> The materials can be made in tubes tubular structure.

[00:09:43]>> It can be made in bowls.

[00:09:46]It can be made in fibers. It can be made in powder.

[00:09:50]that we call as hetroructural modeling.

[00:09:56]Different shapes having different surface area because for example Instead of fiber design I have already known that visible Absorbisible light absorb electrons and holes. These are very fundamentals concept. Electrons and holes chemical reaction we call it as redux reaction oxidation reaction organic pollutants, antibiotics even germs.

[00:11:10]Even we call it as photocatalyis. Mhm.

[00:11:22]>> Photo means light. Catalyis means the reaction in chemistry.

[00:11:31]Photo absorb.

[00:11:33]Photo catalyst actually. Yes. reaction to the water.

[00:11:49]We can just use reuse the water.

[00:12:00]This is one part. Anisha I'm using another thing that we call as po catalyst >> po catalyst material same materials when I was doing my PhD same material photo catalyst I understand and I know but when I went to China and while I was doing my postdoc >> I came to know that my material is again po receptible material >> poor receptable material materials energy external mechanical strain unused unused energy like mechanical noises >> then just like the solar energy.

[00:13:00]Mhm.

[00:13:00]>> First of all, photocatalyst.

[00:13:03]>> Second, I came to know that my material is po >> catalyst individual and after that simultaneously increase because jump and it reaches up to 95%.

[00:13:38]Only 30 minutes. 60 minutes.

[00:13:45]30 to 60 minutes.

[00:13:56]Impactor 17 impactor worldwide because lab terms Normal people have the potential energy.

[00:14:56]Yes. [clears throat] materials.

[00:15:18]full potential.

[00:15:27]Way back from 2005 onwards, scientists from all across the world First of all, electric effect.

[00:15:58]After that scientists came to the optical properties. Optical properties.

[00:16:03]Yes.

[00:16:13]But problem is we need a source.

[00:16:28]We don't need a source because we have a natural source.

[00:16:44]see scientists are working on just bringing the optical absorption in the r of visible >> visible spectrum >> otherwise but commercially practically normal Normal marketing material.

[00:17:31]Fore gas neither liquid noridel we have many research papers on that only thing is >> generator.

[00:18:32]Electrons and holes. As we know, chemical bonding always does by electrons.

[00:18:39]Electrons and holes.

[00:18:54]But particularly for me I was working on water that is why the explanation is mainly in water.

[00:19:20]Forece Yes.

[00:19:59]Interesting.

[00:20:01]Every time when I was discussing my material because everyone knows phys or everyone knows Sometimes it falls down at the bottom of the container.

[00:20:35]>> But the problem is yes.

[00:20:52]Is it usable? No.

[00:20:56]>> We need to throw it away. Right.

[00:20:59]>> If you throw it away, it will it may be on the soil or it may be in water stream.

[00:21:05]>> You will again repolute the same.

[00:21:11]>> So there's a problem. I purposef I'll get a clear water for my normal use but this never happens in my case. What happened is container should not be more than 5T the desired amount of water to the desired amount of ratio proportion amount of >> Mhm. Keep in the sunlight.

[00:22:03]It will be activated shortly.

[00:22:11]Even germs the reaction or everything should be on the surface of the material.

[00:22:27]Mhm.

[00:22:29]>> Now the difference is Mhm.

[00:22:52]by some means because we can just do evaporation process.

[00:23:06]Now the question is because I can use the same material for 10 cycle. This is already proved.

[00:23:17]>> Mhm.

[00:23:24]Mhm.

[00:23:27]Just we can just throw it away the material but efficiency.

[00:23:52]Yes.

[00:23:55]is just like soaps can collect it again just put in the beaker or somewhere some container >> reuse reuse it again after so this is the main difference between and our material environment conservation reuse and recycle material environment I'm very sure.

[00:24:56]Yes. Yes.

[00:24:58]because the the chemical formula itself B3.

[00:25:04]>> So it has F.

[00:25:06]>> Mhm.

[00:25:07]iron at.

[00:25:13]So this property because yes next another purpose same purpose cost effectiveness increases my mate Yes, because reaction means reduction reaction and oxidation reaction.

[00:26:17]chemical reaction output water. Okay.

[00:26:23]>> Yes, you're using the reactant as water, >> the same output as water. So yes, but ultimately water property composition we can we can get the water as well at the same Fore practically.

[00:27:24]infrastructure.

[00:27:36]Yes, in the laboratory. Yes.

[00:27:42]Mhm.

[00:27:44]But ultimately because research I say yes that is not the true research commercially practically common people from college of material science and engineering results.

[00:28:12]Shall we do some practical experience regarding this material?

[00:28:20]In the middle of the university they have created a artificial river I don't know how but they have created rivers just P electric mechanical strength at the same time.

[00:29:03]It was around some 300 steps.

[00:29:16]And at the same time energy will keep on increasing as you keep on increasing the number of states increases material over the surface. face of the stairs.

[00:29:41]From the above we have sunlight.

[00:29:46]We checked the water in the low lowest level.

[00:29:53]We took the sample from that and we got the effective results.

[00:30:02]So this proves that it can go up to the practical level or the commercial level.

[00:30:22]Of course.

[00:30:34]Largest freshwater and physically.

[00:31:02]even we have water.

[00:31:06]We have many rivers.

[00:31:17]Mhm. But foreign.

[00:31:30]So, but the problem is because we are not sure.

[00:31:56]But when we put directly the material to the pawn, >> we are not sure because pawn 550 and at the same time normal.

[00:32:49]Just like some practical understanding but all across the world.

[00:33:18]Both stimulan as well ultimately we have titanium valley.

[00:33:40]So 1 kilome titanium oxide is also a very popular semiconductor optical material already. They have checked semiconducting properties there are many applications I'm writing projects on that lay understanding apparatus device.

[00:34:52]You can put inside the inside the room.

[00:34:58]It should be above the roof on the roof.

[00:35:04]Clean water through the I'm trying on that.

[00:35:16]I was about to ask you for the next question.

[00:35:35]proven sir domestic large scale to some extent.

[00:36:25]Uh yes question because during my PhD I post dream come for all the common people I need some financial support >> because I got all the results it will be very new for other people yes physically they Understand?

[00:37:24]>> Because you know because they have experienced understand but up to what extent understanding I'm also applying individual funding we have council work some months back some residents from I even went there.

[00:38:38]But the main thing is financial support because to maintain power.

[00:39:05]So we are we are working on that and we can just get the positive results.

[00:39:17]department lifetime of research and work.

[00:39:35]Thank you for that.

[00:39:39]programs.

[00:40:03]Yes.

[00:40:18]human health Mhm.

[00:40:41]Because pollutin removal is again cumbersome process.

[00:40:59]Mhm. Mhm. because uh so that ecosystem deeper research practically entire ecos.

[00:41:54]Thank you.

[00:41:54]>> Thank you so much for your time.

[00:42:09]science program.