Thiosemicarbazone-Modified Cellulose: Synthesis, Characterization, and Adsorption Studies on Cu(II) Removal

Tien A Nguyen; Dang B Tran; Hien Dat C Le; Quang L Nguyen; Vinh Pham

doi:10.1021/acsomega.0c01129

Thiosemicarbazone-Modified Cellulose: Synthesis, Characterization, and Adsorption Studies on Cu(II) Removal

ACS Omega. 2020 Jun 12;5(24):14481-14493. doi: 10.1021/acsomega.0c01129. eCollection 2020 Jun 23.

Authors

Tien A Nguyen^{1

2}, Dang B Tran³, Hien Dat C Le³, Quang L Nguyen⁴, Vinh Pham⁵

Affiliations

¹ Department for Management of Science and Technology Development, Ton Duc Thang University, Ho Chi Minh City 700000, Vietnam.
² Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City 700000, Vietnam.
³ Ho Chi Minh City University of Education, Ho Chi Minh City 700000, Vietnam.
⁴ Le Hong Phong High School for the Gifted, Ho Chi Minh City 700000, Vietnam.
⁵ Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam.

Abstract

Thiosemicarbazide-modified cellulose (MTC) has been studied for removing heavy metals in the water source or for extracting some precious metals. The conditions of synthesis of MTC and Cu(II) removal were optimized by single-variable analysis through oxidation-reduction on titration and photometry. The results of Fourier-transform infrared spectroscopy, Brunauer-Emmett-Teller, and thermogravimetric analyses show that MTC exists in the thioketone form with a high surface area and heat durability. The Cu(II) removal was of pseudo-second order and the isotherm equation correlated best with the Langmuir equation. MTC has the maximum capacity of adsorption, which is q _m = 106.3829 mg g^-1. Furthermore, MTC can be regenerated without the loss of adsorption efficiency after ten cycles of adsorption and desorption.