| 不同纳米材料对As(Ⅲ)的吸附机制 |
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| 引用本文： | 黄青,林丽娜,李昉峻,廉菲,刘仲齐,宋正国.不同纳米材料对As(Ⅲ)的吸附机制[J].农业环境科学学报,2017,36(11):2322-2331. |
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| 作者姓名： | 黄青 林丽娜 李昉峻 廉菲 刘仲齐 宋正国 |
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| 作者单位： | 1. 沈阳农业大学土地与环境学院,沈阳 110866;农业部环境保护科研监测所,天津 300191;2. 农业部环境保护科研监测所,天津,300191;3. 农业部环境保护科研监测所,天津 300191;吉林农业大学资源与环境学院,长春 130118 |
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| 基金项目： | 天津市应用基础与前沿技术研究计划项目（15JCZDJC33900）；国家自然科学基金项目（41273136） |
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| 摘 要： | 为明确不同纳米材料对水中As(Ⅲ)的吸附效果和机制,筛选出经济有效的As污染吸附材料,采用批处理振荡平衡法,研究了多层氧化石墨烯(多层GO)、20 nm羟基磷灰石(P20)、40 nm羟基磷灰石(P40)以及纳米零价铁(n Fe)对As(Ⅲ)的吸附差异性。结果表明,不同纳米材料对As(Ⅲ)的吸附能力存在显著差异(P0.05),吸附容量的大小顺序为多层GO(17.4 mg·g~(-1))P20(2.74 mg·g~(-1))P40(2.17 mg·g~(-1))n Fe(0.976 mg·g~(-1))。其中,多层GO对As(Ⅲ)的吸附效果最好,其饱和吸附量是nFe的17.8倍。通过能量弥散X射线谱(EDS)、X-射线光电子能谱(XPS)、傅里叶红外光谱(FTIR)等对不同纳米材料吸附As(Ⅲ)前后进行分析,证实了多层GO的吸附机制是以单层化学吸附为主;P20、P40、nFe吸附机制为材料表面的聚沉吸附及含氧官能团与As(Ⅲ)发生络合等反应的吸附。实验结果表明多层GO可作为吸附材料用于As(Ⅲ)污染水体的修复。
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| 关 键 词： | 纳米材料 砷 吸附 氧化石墨烯 羟基磷灰石 纳米零价铁 |
| 收稿时间： | 2017/4/24 0:00:00 |
The mechanism for arsenic(Ⅲ)adsorption from aqueous solutions via different nanomaterials |
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| HUANG Qing,LIN Li-n,LI Fang-jun,LIAN Fei,LIU Zhong-qi and SONG Zheng-guo.The mechanism for arsenic(Ⅲ)adsorption from aqueous solutions via different nanomaterials[J].Journal of Agro-Environment Science( J. Agro-Environ. Sci.),2017,36(11):2322-2331. |
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| Authors: | HUANG Qing LIN Li-n LI Fang-jun LIAN Fei LIU Zhong-qi and SONG Zheng-guo |
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| Institution: | School of Land and Environment, Shenyang Agriculture University, Shenyang 110866, China;Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China,Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China,Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China;School of Resource and Environment, Jilin Agricultural University, Changchun 130118, China,Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China,Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China and Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China |
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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 ab-sorptivity 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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| Keywords: | nanomaterials arsenic adsorption graphere oxide hydroxylapatite nano zerovalent iron |
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