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| The mechanism for arsenic(Ⅲ) adsorption from aqueous solutions via different nanomaterials |
| Received:April 24, 2017 |
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| KeyWord:nanomaterials;arsenic;adsorption;graphere oxide;hydroxylapatite;nano zerovalent iron |
| Author Name | Affiliation | E-mail | | HUANG Qing | School of Land and Environment, Shenyang Agriculture University, Shenyang 110866, China
Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China | | | LIN Li-na | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China | | | LI Fang-jun | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China
School of Resource and Environment, Jilin Agricultural University, Changchun 130118, China | | | LIAN Fei | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China | | | LIU Zhong-qi | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China | | | SONG Zheng-guo | Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China | forestman1218@163.com |
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| Abstract: |
| Batch sorption experiments were conducted to investigate the adsorption of arsenic(Ⅲ) from aqueous solution via multilayer graphene oxide(multilayer GO), 20 nm hydroxylapatite(P20), 40 nm hydroxylapatite(P40), and nano zerovalent iron(nFe). The results showed significant differences(P<0.05) in the adsorption capacity of the different nanomaterials for arsenic(Ⅲ). The order of absorptivity of these nanomaterials for arsenic(Ⅲ) was multilayer GO(17.4 mg·g-1) > P20(2.74 mg·g-1) > P40(2.17 mg·g-1) > nFe(0.976 mg·g-1). The absorptivity of multilayer GO was 17.8 times that of nFe. Through characterization of the different nanomaterials using Energy-dispersive X-ray Spectroscopy(EDS), X-ray Photoelectron Spectroscopy(XPS), and Fourier Transform Infrared Spectroscopy(FTIR), it was confirmed that the adsorption mechanism of multilayer GO included chemical adsorption and physical adsorption, whereas the adsorption mechanisms of P20, P40, and nFe consisted of coagulation adsorption and complexation of oxygen-containing functional groups. |
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