Plasma-induced grafting of acrylic acid on bentonite for the removal of U(VI) from aqueous solution

Hongshan ZHU (祝宏山); Shengxia DUAN (段升霞); Lei CHEN (陈磊); Ahmed ALSAEDI; Tasawar HAYAT; Jiaxing LI (李家星)

doi:10.1088/2058-6272/aa8168

Plasma Science and Technology > 2017 > 19(11): 115501. > DOI: 10.1088/2058-6272/aa8168

Hongshan ZHU (祝宏山), Shengxia DUAN (段升霞), Lei CHEN (陈磊), Ahmed ALSAEDI, Tasawar HAYAT, Jiaxing LI (李家星). Plasma-induced grafting of acrylic acid on bentonite for the removal of U(VI) from aqueous solution[J]. Plasma Science and Technology, 2017, 19(11): 115501. DOI: 10.1088/2058-6272/aa8168

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Plasma-induced grafting of acrylic acid on bentonite for the removal of U(VI) from aqueous solution

1 School of Chemical Engineering, Shandong University of Technology, Zibo 255049, People’s Republic of China 2 Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China 3 NAAM Research Group, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia 4 Department of Mathematics, Quaid-I-Azam University, Islamabad 44000, Pakistan

Funds: support from the Special Scientific Fund of Public Welfare Profession of China (No. 201509074) and National Natural Science Foundation of China (Nos. 21272236, U1230202) are acknowledged.

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Received Date: May 02, 2017

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Abstract

Abstract

Fabrication of reusable adsorbents with satisfactory adsorption capacity and using environment-friendly preparation processes is required for the environment-related applications. In this study, acrylic acid (AA) was grafted onto bentonite (BT) to generate an AA-graft-BT (AA-g-BT) composite using a plasma-induced grafting technique considered to be an environment-friendly method. The as-prepared composite was characterized by scanning electron microscopy, x-ray powder diffraction, thermal gravity analysis, Fourier transform infrared spectroscopy and Barrett–Emmett–Teller analysis, demonstrating the successful grafting of AA onto BT. In addition, the removal of uranium(VI)(U(VI)) from contaminated aqueous solutions was examined using the as-prepared composite. The influencing factors, including contact time, pH value, ionic strength, temperature, and initial concentration, for the removal of U(VI) were investigated by batch experiments. The experimental process fitted best with the pseudo-second-order kinetic and the Langmuir models. Moreover, thermodynamic investigation revealed a spontaneous and endothermic process. Compared with previous adsorbents, AA-g-BT has potential practical applications in treating U(VI)-contaminated solutions.
- plasma-induced,
- grafting,
- bentonite,
- U(VI)

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References (43)

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