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Adsorption Of 2 , 3-Dichlorovinyl Dimethyl Phosphate ( DDVP ) From Aqueous Solution Onto Groundnut Shell Activated Carbon : Isotherm And Kinetic Studies
| Content Provider | Semantic Scholar |
|---|---|
| Author | Kigbu |
| Copyright Year | 2017 |
| Abstract | Activated carbon is a highly porous and adsorbent material. It is applied in domestic, commercial and industrial settings (Mendez et al., 2006). In the food industry, activated carbon is used in decolourization, deodorization and for taste removal. It is also used to remove heavy metals and organic contaminants from liquids. In medicine, it is used for adsorption of harmful chemicals and drugs (Oyo & Igbokwe, 2001; Innamullah et al., 2008). Basically, there are two different processes for the preparation of activated carbon: the physical or thermal and chemical activation. The physical activation involves subjecting the material to high temperatures of between 700 o C and 1000 o C using air, carbondioxide or water vapour. The chemical activation involves the use of activating agents such as phosphoric acid, sodium hydroxide, potassium hydroxide, zinc chloride, etc. In chemical activation, the raw material or carbonized sample is impregnated with an activating agent and then heated in a furnace. Activated carbon is the most widely known and used adsorbent (a material that has the ability to extract certain substances from gases, liquids or solids, causing them to Abstract: In this research, groundnut shell, was used to produce low-cost adsorbents for the removal of 2, 3dichlorovinyl dimethyl phosphate (DDVP) in aqueous solution. The one step activation process was adopted, using three activating agents: phosphoric acid, potassium carbonate and nitric acid. The raw groundnut shell along side with the different activated carbon produced were subjected to different analysis: physico-chemical, scanning electron microscopy (SEM), methylene blue and Iodine number as well as a determination of the ability of these samples to adsorb DDVP in aqueous solution. The methylene blue and Iodine number gave strong indication of the activated carbon to have good potentials of its use as adsorbent, having both microporous and mesoporous structures, hence meeting the minimal requirement for the purpose. The SEM analysis showed morphologies of the samples indicating activated carbon that is heterogeneous in nature (i.e consisting of both micropore and mesopore structures). The study concludes that groundnut shell is a very good precursor for use as adsorbents which can be incorporated for adsorption of DDVP from aqueous solutions. This method will be highly rewarding in converting waste to wealth, contributing in having cheaper sources of adsorbent and as well getting rid of solid wastes from the environment, serving as a beneficial solid waste management technique. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.ijiras.com/2017/Vol_4-Issue_6/paper_31.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
