ADSORPTION OF MERCURIC ION FROM AQUEOUS SOLUTIONS USING MODIFIED FLY ASH

Authors

  • Nguyen Thuy Chinh Institute for Tropical Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi https://orcid.org/0000-0001-8016-3835
  • Hoang Thai Institute for Tropical Technology, Vietnam Academy of Science and Technology
  • Trang Do Mai Tran Thuy Loi University, 173 Tay Son, Dong Da, Ha Noi
  • Tuyet Thi Nguyen Ly Thai To High School, Nguyen Van Troi, Dinh Bang, Tu Son, Bac Ninh
  • Oanh Nhat Nguyen Hanoi Pedagogical University 2, Nguyen Van Linh, Xuan Hoa, Phuc Yen, Vinh Phuc
  • Mai Thi Tran Institute for Tropical Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi
  • Trang Thi Thu Nguyen Institute for Tropical Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi

DOI:

https://doi.org/10.15625/2525-2518/56/6/12664

Keywords:

(3-Mercaptopropyl) triethoxysilane, fly ash, mercuric ion absorption, adsorption isotherm models

Abstract

In this study, fly ash was treated with NaOH solution (FAN) before modifying with (3-mercaptopropyl) triethoxysilane - MPTMS (FAMPS). By using FTIR, FESEM, XRD, EDX, and BET techniques, the change in structure, composition and morphology of FAN and FAMPS was evaluated. The FTIR spectra of FAN and FAMPS showed that there is no chemical reaction between the MPTMS and FAN. After modification, the FAMPS has a rough surface with composition difference from the FAN. Mercuric ion adsorption behavior as well as adsorptionisotherm models (Langmuir and Freundlich) of the FAN and FAMPS were also investigated and discussed. Thanks to FAN modification, the mercuric ion removal percent of the FAMPS was higher than that of the FAN. Owing to the adsorption data, Freundlich isotherm modelwas fitted for the mercuric ion adsorption process.

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Author Biography

Nguyen Thuy Chinh, Institute for Tropical Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi

ThS. Nguyễn Thúy Chinh

Phòng Hóa lý vật liệu phi kim loại (phòng 2)

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Published

2018-12-17

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Section

Materials