Öktem, Gülce (2013) INVESTIGATION OF REMOVING Cr(VI) IONS FROM AQUEOUS SOLUTIONS BY USING WASTE MATERIALS AS ADSORBENT. Other thesis, TED ANKARA COLLEGE FOUNDATION PRIVATE HIGH SCHOOL.
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Abstract
In the chemistry course of national program our teacher has talked about the pollution problems related to our environment. Subject attracted my interest since all of us should be sensitive for a clean environment and to leave a clean world to the next generations. A short research led me to interest with the industrial wastes which pollute our waters. After learning the severe effects of heavy metals on human health I make a research on how to remove heavy metals from waste waters. I found that adsorption is most effective and economical method in removing heavy metals. Therefore I planned to use some waste plastics as adsorbent. By this way I was expected to remove heavy metals and convert waste plastics into useful materials. Working with the removal of Cr(VI) ions and using of PET, PAN and Cotton occurred spontaneously due to literature information and availability of the laboratory asked for help. A toxic metallic element with a density usually 4-5 times greater than the density of water is classified as a heavy metal. Chromium and chromium compounds are cancer causing agents. Therefore, studying the removal of chromium ions with waste materials from aqueous solutions was planned. Then I asked the research question; “Under atmospheric conditions and at room temperature, how does removal of Cr(VI) ions from aqueous solutions is affected by the solution pH, adsorption time and Cr(VI) concentration when PET, PAN and cotton are used as adsorbents? Waste water bottles (PET), synthetic wool (PAN), and cotton (natural polymer) were used as adsorbent in the removal of Cr(VI) ions from aqueous solutions. Maximum Cr(VI) adsorptions are obtained at pH=5.0-5.5. Time experiments showed a fast adsorption of Cr(VI) ions onto adsorbents. Highest maximum adsorption capacity is obtained with PAN, about 3.610.15 mg Cr(VI)/g PAN in 400.01.1 ppm Cr(VI) solution
| Item Type: | Thesis (Other) |
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| Additional Information: | Supervisor: Serenay Tarhan Güler, IB Notu: A |
| Uncontrolled Keywords: | pollution problems, environment, heavy metals, waste plastics |
| Subjects: | Q Science > QD Chemistry |
| Depositing User: | Users 114 not found. |
| Date Deposited: | 17 Sep 2013 10:09 |
| Last Modified: | 12 Apr 2019 11:51 |
| URI: | http://tedprints.tedankara.k12.tr/id/eprint/371 |
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