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| Absorption of Pb2+ and Cd2+ in Water Using 3D Nitrogen-doped Graphene |
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| DOI： |
| KeyWord:3D graphene Pb2+ Cd2+ nitrogen-doped |
| Author | Institution |
| CHEN Hai-ling,SONG Xin-hong,ZHAO Ting-ting,CHEN Xi* |
1. 泉州医学高等专科学校检验预防系;2.厦门华厦学院检验科学与技术系;3.厦门大学化学化工学院化学系，谱学分析与仪器教育部重点实验室 |
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| Abstract: |
| An approach was presented for the preparation of 3D nitrogen-doped graphene（3D rGO-DA） using dopamine（DA） as both reductant and functionalizing agents. Compared with reduced graphene oxide（rGO）,the 3D rGO-DA shows an excellent absorption ability toward Pb2+ and Cd2+.The adsorption capacities of 3D rGO-DA toward Pb2+ and Cd2+ were found to be 91.4mg/g and 43.5mg/g,respectively.The effect factors,including adsorption times, pH values and initial concentrations of Pb2+ and Cd2+,were studied. Adsorption time of 120min and pH 5.0 was found to be the suitable condition for Pb2+ and Cd2+ adsorption. The removal efficiency of Pb2+ and Cd2+ reached maximum value of 100% and 87.7% at the initial concentration lower than 30μg/mL, respectively. After 3 cycle absorption/desorption,the 3D rGO-DA still remained an excellent absorptive capacity,and could be easily removed from water with HCl after adsorption process, indicating its applicability in the water purification. |
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