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改性膨胀石墨对含铅废水吸附特性

Keywords: 纳米氢氧化镁,膨胀石墨,

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Abstract:

采用微波法在1000W下微波膨胀60s制备了膨胀石墨,以乙醇为分散剂,采用超声沉淀法制备了纳米氢氧化镁,同时将纳米氢氧化镁负载到膨胀石墨孔隙中,制备出一种新型吸附剂,并采用静态吸附的方法研究了该吸附剂对铅离子的吸附效果,实验证明当改性膨胀石墨的用量为0.035g,铅溶液的pH=4,铅溶液初始浓度为300mg/L,吸附温度为25℃时,该吸附剂对铅离子的去除率能达到48%,吸附容量能达到105mg/g左右。同时该吸附反应能够较好地符合Langmuir吸附等温式以及二级动力学模型。

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