Adsorbents are used to remove pollutants from water. How the removed pollutants disposed off? If the pollutants are dumped, how adsorption is considered as sustainable.
Dear Chandrasekar, this is a very important aspect "how to regenerate the adsorbent without to cause secondary pollution?" Indeed, few studies discuss this aspect. In my opinion, the answer basically depends on two aspects; the kind of adsorbate (its physicochemical nature) and the system used to recycle the adsorbent. For example, some dyes removed from water by adsorption can be recovered after the recycling of the post-used adsorbent (similarly to some organic compounds). In contrast, the recovery and reuse o metal ions, for instance, can be too onerous. There are some studies that describe the development of dual-function materials able to adsorb and degrade the adsorbates simultaneously (see Article Simultaneous adsorption and degradation of 2,4-dichloropheno...
) . This can be an interesting strategy to overcome the limitation that you´ve mentioned. Again, your question is very pertinent.
concentrated organic pollutants once eluted can be dried and incinerated, concentrated inorganic pollutants including heavy metals may be immobilized in the form of bricks/concrete
Article Stabilization of heavy metals in fired clay brick incorporat...
The first time is to study the nature of pollutant. After that you will see if you can do desorption or burn off the activated carbon loaded.
hello Dear
The adsorption process depends on the type of adsorbent and the adsorbent material. In some species it is used as fertilizer for agricultural lands and when it reaches the soil it suffers from decomposition and is separated from the adsorbent and sometimes it is burned and transformed into another substance that is reused. The adsorption process is in many cases physically related, some of it chemical
There is another more interesting alternative in this field, it's to degrade the pollutant (total oxidation in CO2+H2O) on the material which acts as a catalyst. Thus, the material is regenerated and reused later!!
One can guess what you mean. Are you going to write a report based on the answers you got? There are many books on this topic you can use.
@Mirooslaw, yes sir, there are many books to read. I just need to know the answers for my question. So, that I am using Research gate. FYI I am not going to write any report. :)
Ragavan Chandrasekar, Then try to narrow the subject area of the question, because everything can be written here and nothing. But this is not the first such question on RG.
It depends upon you whether you want to use this material for your further experimentation in order to check its reusability or process cost effectiveness then you can go ahead for desorption experiment and then make particle pollutant free again. But if you want to attain your desorbed pollutant more less toxic then i think you can go a head to use degradation experiment as it will not only adsorb pollutant but also degrade your pollutant during degradation process.