Utilization of Waste Amine-Oxime (WAO) Resin to Generate Carbon by Microwave and Its Removal of Pb(II) in Water

Chunlin He; Yun Liu; Chunhui Zheng; Yanming Jiang; Yan Liao; Jiaxin Huang; Toyohisa Fujita; Yuezhou Wei; Shaojian Ma

doi:10.3390/toxics10090489

Utilization of Waste Amine-Oxime (WAO) Resin to Generate Carbon by Microwave and Its Removal of Pb(II) in Water

Toxics. 2022 Aug 23;10(9):489. doi: 10.3390/toxics10090489.

Authors

Chunlin He^{1

2}, Yun Liu^{1

2}, Chunhui Zheng^{1

2}, Yanming Jiang^{1

2}, Yan Liao^{1

2}, Jiaxin Huang^{1

2}, Toyohisa Fujita^{1

2}, Yuezhou Wei^{3

4}, Shaojian Ma^{1

2}

Affiliations

¹ School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China.
² Guangxi Key Laboratory of Processing for Non-Ferrous Metal and Featured Materials, Guangxi University, Nanning 530004, China.
³ School of Nuclear Science and Technology, University of South China, Hengyang 421000, China.
⁴ School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.

Abstract

Utilising waste amine-oxime (WAO) resin through microwave semi-carbonization, a carbon adsorbent (CA) was obtained to remove Pb(II). After microwave treatment, the pore size of the skeleton structure, three-dimensional porous network, and lamellar pore structure of WAO was improved. The distribution coefficient (Kd) of Pb(II) onto CA is 620 mL/g, and the maximum adsorption capacity of Pb(II) is 82.67 mg/g after 20 min of WAO microwave treatment. The adsorption kinetics and adsorption isotherms conform to the quasi-second-order kinetic equation and Langmuir adsorption isotherm model, respectively. The surface of MT-WAO is negatively charged and the adsorption mechanism is mainly electrostatic interaction. Pb(II) elution in hydrochloric acid solution is more than 98%, and its recovery is high at 318 K and for 1 h.

Keywords: Pb(II); adsorbent; adsorption; microwave; waste amine-oxime.

Abstract

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