Arsenic adsorption from water : review of technologies and evaluation of natural and synthetic adsorbents
Millions of people around the world are at risk of arsenic (As) poisoning. In present times, there have been countless research being conducted on As removal from water due to the gravity of the arsenic contamination situation around the world, especially in developing countries. Of exceptional prom...
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| Format: | Final Year Project |
| Language: | English |
| Published: |
2011
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| Online Access: | http://hdl.handle.net/10356/45215 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | Millions of people around the world are at risk of arsenic (As) poisoning. In present times, there have been countless research being conducted on As removal from water due to the gravity of the arsenic contamination situation around the world, especially in developing countries. Of exceptional promise was adsorption studies due to its relatively low level of technology, manpower, technical know-how and cost requirements.Iron oxides and granular activated carbon (GAC) are some of the better
adsorbents for pollutants removal from waste streams or contaminated water in the
market. However, iron oxides crumble easily and GAC does not seem to have a high
affinity for arsenic. It was proposed that an iron-impregnated GAC (GAC-Fe) would
be the key to synthesizing an adsorbent that has a high affinity for As and
mechanical stability for adsorption columns. Research has shown that an iron
concentration of 0.15M would result in a type of GAC-Fe that possesses a very high
As removal rate as well as long breakthrough time. |
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