Adsorption of fluoride from aqueous solution by graphene |
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| Authors: | Li Yanhui Zhang Pan Du Qiuju Peng Xianjia Liu Tonghao Wang Zonghua Xia Yanzhi Zhang Wei Wang Kunlin Zhu Hongwei Wu Dehai |
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| Institution: | Laboratory of Fiber Materials and Modern Textile, The Growing Base for State Key Laboratory, Qingdao University, 308 Ningxia Road, Qingdao 266071, China. liyanhui@tsinghua.org.cn |
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| Abstract: | A batch adsorption system was applied to investigate the adsorption of fluoride from aqueous solution by graphene. The adsorption capacities and rates of fluoride onto graphene at different initial pH, contact time, and temperature were evaluated. The experimental results showed that graphene is an excellent fluoride adsorbent with an adsorption capacity of up to 17.65 mg/g at initial fluoride concentration of 25 mg/L and temperature of 298 K. The isotherm analysis indicated that the adsorption data can be well described by Langmuir isotherm model. Thermodynamic studies revealed that the adsorption reaction was a spontaneous and endothermic process. |
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