| 학회 |
한국화학공학회 |
| 학술대회 |
2009년 가을 (10/22 ~ 10/23, 일산 KINTEX) |
| 권호 |
15권 2호, p.1922 |
| 발표분야 |
환경 |
| 제목 |
Heavy metal retention on modified montmorillonite |
| 초록 |
The efficacy of un-calcined sodium exchanged (Na-MMT) and acid modified montmorillonite (A-MMT) has been investigated for adsorptive removal of heavy metals from aqueous solution. Physico-chemical parameters such as pH, initial metal ion concentration, and equilibrium contact time were studied in a series of batch adsorption experiments. The equilibrium time of contact for both adsorbents was about 230 min using Ni2+ as a representative of the heavy metal cationic species. The RedlichPeterson model best described the equilibrium sorption of Ni2+ onto Na-MMT and the DubininRadushkevich model was the best model in predicting the equilibrium sorption of Ni2+ onto A-MMT. The kinetics of Ni2+ uptake by Na-MMT and A-MMT followed the pseudo-second-order chemisorption mechanism. Sorption of Ni2+ onto Na-MMT and A-MMT was spontaneous and endothermic in nature. The desorption studies present the repeatability use of the spent adsorbents and in a real wastewater application, Na-MMT and A-MMT have adsorptive capabilities for effective removal of heavy metals in industrial effluents. |
| 저자 |
김동수, Christianah Olakitan Ijagbemi, Mi-Hwa Baek, Sua Choi
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| 소속 |
이화여자대 |
| 키워드 |
Na-montmorillonite; A-montmorillonite; Heavy metals; Nickel; Adsorption isotherm and kinetics
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| E-Mail |
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| 원문파일 |
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