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|
| Type |
Poster Presentation |
| Area |
Material Chemistry |
| Room No. |
Event Hall |
| Time |
4월 20일 (금요일) 11:00~12:30 |
| Code |
MAT.P-374 |
| Subject |
Phosphate adsorption behavior of layered gadolinium hydroxide in aqueous solutions |
| Authors |
Hong gu Jeon, Hyunsub Kim, Song-ho Byeon*
Department of Applied Chemistry, Kyung Hee University, Korea
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| Abstract |
Phosphorus, in the form of phosphates in water, has both benefits and disadvantages. For instance, too much of it causes serious eutrophication in water bodies, whereas it is one of the essential nutrients that humans and animals need. Phosphorus is also a requisite of fertilizers for agricultural food production. Unfortunately, only a fifth of the phosphate content of fertilizers are being consumed by humans as most of them are washed away while in food production process. Hence, it is important to develop materials for the recovery of phosphates from environmental and industrial waste waters in order to reuse them. The use of rare earths (RE) is advantageous since they have high affinity to form stable complexes with phosphates even at low concentrations. Very low solubility of rare earth phosphate REPO4 in water resulted in a significantly high phosphate adsorption capacity of l-RE(OH)3. In this study, layered gadolinium hydroxide l-Gd(OH)3 was selected as a representative adsorbent for the phosphate detection/removal from water over a wide pH range. The kinetics and isotherm of phosphate adsorption on l-Gd(OH)3 were investigated in aqueous solutions at pH = 5, 7, 9. The determined phosphate adsorption capacity of l-Gd(OH)3 was compared with those of layered rare-earth hydroxides containing Sm, Y, and Er. This new series of adsorbent can be a promising alternative for efficient and sensitive phosphate detection/recovery from natural and waste waters. |
| E-mail |
jjmh103@hanmail.net |
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121st General Meeting of the KCS