以硼酸和三聚氰胺为原料,制备出活性氮化硼(ABN),对其进行表征,并考察了ABN对水中铜离子的吸附性能。结果表明:ABN微观结构呈棒状,直径为1～4μm不等,表面存在多种化学基团。ABN对铜离子的吸附符合Langmuir等温吸附模型,吸附过程以化学吸附为主,可用拟二级动力学模型描述。当铜离子浓度为10mg/L、投加量为0.7g/L、pH=7.0、吸附时间为40min时,铜离子的去除率可达到99.56%。
Activated boron nitride (ABN) was synthesized by using boric acid and melamine as raw material.The obtained ABN was characterized and the adsorption property of copper in water were investigated.The results showed that ABN exhibited rod shaped microstructure with the diameter of 1～4μm,and various functional groups existed in the surface of ABN.The adsorption performance of copper by ABN was more fits to the Langmuir isotherm model,and the adsorption process was mainly based on chemical adsorption,which can be described by the pseudo-second order kinetics model.The removal rate can reach to 99.56% when the initial copper concentration was 10mg/L,the dose of ABN was 0.7g/L,the initial pH was 7.0 and the adsorption time was 40min.
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基金资助
国家自然科学基金(51608165);天津市水质科学与技术重点实验室开放研究基金(TJKLAST-ZD-2016-01)
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