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首页> 外文期刊>Journal of Applied Polymer Science >Preparation of an aminated bagasse fiber and its mercury adsorption behavior
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Preparation of an aminated bagasse fiber and its mercury adsorption behavior

机译：胺化甘蔗渣纤维的制备及其对汞的吸附行为

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An aminated bagasse (AB) with highadsorption capacity for mercury ions was prepared by grafting copolymerization of acrylonitrile onto sugarcane bagasse, followed by aminating with chelating molecule diethylenetriamine. Effects of grafting conditions such as irradiation dosage, acrylonitrile concentration, and solvents on the grafting yield were investigated. The adsorption performance for mercury ions were evaluated by batch adsorption experiments and kinetic experiments. The results show that AB is effective for the removal of mercury over a wide range of pH > 5. Adsorption isotherms of mercury ions on the modified bagasse can be well described by Langmuir equation. The equilibrium adsorption amount could be as high as 917.4 mg/g, and the removal percent of mercury ions can achieve 99%. The kinetic adsorption results indicate that AB could remove 80% of mercury ions in 2 h and 24 more hours are needed to achieve adsorption equilibrium. Regeneration experiments show that the adsorption capacity of recycled AB still can reach the level of 96% after four cycles.
机译：通过将丙烯腈接枝共聚到甘蔗渣上，然后与螯合分子二亚乙基三胺进行胺化反应，制备了对汞离子具有高吸附能力的胺化蔗渣（AB）。研究了辐照剂量，丙烯腈浓度和溶剂等接枝条件对接枝率的影响。通过间歇吸附实验和动力学实验评估了汞离子的吸附性能。结果表明，AB可在pH> 5的宽范围内有效去除汞。Langmuir方程可很好地描述改性甘蔗渣上汞离子的吸附等温线。平衡吸附量可高达917.4 mg / g，汞离子的去除率可达到99％。动力学吸附结果表明，AB可以在2 h内去除80％的汞离子，需要24小时才能达到吸附平衡。再生实验表明，经过4个循环后，再生AB的吸附量仍可达到96％。

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