Application of Amino and Thiolated Multi-walled Carbon Nanotubes for Removal of Mercury from Aqueous Solutions

سال انتشار: 1393
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 665

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شناسه ملی سند علمی:

ICNN05_164

تاریخ نمایه سازی: 30 آبان 1394

چکیده مقاله:

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.

نویسندگان

Mojtaba Hadavifar

Department of Environmental Science, Faculty of Natural Resources, Tarbiat Modares University, Noor, Iran

Nader Bahramifara

Department of chemistry, Payam Noor University (PNU), Tehran, Iran

Habibollah Younesi

Department of Environmental Science, Faculty of Natural Resources, Tarbiat Modares University, Noor, Iran