Application of Amino and Thiolated Multi-walled Carbon Nanotubes for Removal of Mercury from Aqueous Solutions
- سال انتشار: 1393
- محل انتشار: پنجمین کنگره بین المللی نانو و فناوری نانو (ICNN2014)
- کد COI اختصاصی: ICNN05_164
- زبان مقاله: انگلیسی
- تعداد مشاهده: 688
نویسندگان
Department of Environmental Science, Faculty of Natural Resources, Tarbiat Modares University, Noor, Iran
Department of chemistry, Payam Noor University (PNU), Tehran, Iran
Department of Environmental Science, Faculty of Natural Resources, Tarbiat Modares University, Noor, Iran
چکیده
Mercury is a toxic metal that causes the serious environmental problems. In present study, multi-walledcarbon nanotubes were functionalized in four stages to create thiolated multi-walled carbon nanotubes (MWCNTs-SH).The efficiency of all synthesized MWCNTs in mercury removal was investigated. MWCNTs-SH was more efficientrather than other synthetized adsorbents in mercury removal from aqueous solutions. Increasing in adsorbent dosageconcluded an enhanced mercury removal. Solution pH has a more effect on mercury removal. When the pH increasedfrom 2 to 8 the removal percentage ranged from 9.8 to 92%. The data fitted by Langmuir isotherm model (R2=0.966)better than Freundlich model (R2=0.935). The obtained maximum adsorption capacity (qm) by Langmuir model was206.64 mg/g while its experimental value was 160.90 mg/g and was higher than that reported in other literatures. Thusthe prepared synthetized adsorbent has high efficiency for mercury removal from aqueous solutions.کلیدواژه ها
MWCNTs, Mercury, Functionalizing, thiol functional group, Isotherm modelsاطلاعات بیشتر در مورد COI
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