采用氧化还原法制备石墨烯，研究其对水中铬(VI)的吸附性能，考察了溶液初始pH值、吸附温度、石墨烯用量等对吸附效果的影响及吸附热力学和动力学性能. 结果表明，石墨烯是一种良好的吸附铬(VI)的吸附剂，吸附过程可用Langmuir等温吸附模型较好地描述，为优惠吸附，是自发吸热过程，符合拟二级吸附动力学模型，吸附活化能为88.62 kJ/mol.
Graphene was prepared by graphite oxide reduction method. Graphene was used to remove Cr(VI) from water as an absorbent. Effects of pH, temperature and graphene dosage on the adsorption capacity, adsorption thermodynamics and kinetics were discussed. The results showed that graphen was a good adsorbent of Cr(VI). The adsorption behavior was the favourable adsorption, conformed the Langmuir isotherm equation well. The adsorption process was spontaneous and endothermic process, it corresponded with pseudo-secong-order kinetic model, the activation energy was 88.62 kJ/mol.
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