Graphene oxide/chitin nanofibril composite foams as column adsorbents for aqueous pollutants.
Graphene oxide/chitin nanofibril composite foams as column adsorbents for aqueous pollutants.
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DOI：
10.1016/j.carbpol.2016.02.057
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发表时间：
2016-06
影响因子：
11.2
通讯作者：
Zhongshi Ma;Dagang Liu;Yi Zhu;Zehui Li;Zhen-xuan Li;Huafeng Tian;Haiqing Liu
中科院分区：
文献类型：
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作者：
Zhongshi Ma;Dagang Liu;Yi Zhu;Zehui Li;Zhen-xuan Li;Huafeng Tian;Haiqing Liu
制备了氧化石墨烯/甲壳素纳米纤维（GO-CNF）复合泡沫材料，并将其作为柱吸附剂应用于水污染物的处理。对纳米纤维支撑的复合泡沫材料的结构、形貌和性能进行了表征。作为一种特殊情况下，亚甲基蓝（MB）的GO-CNF的吸附进行了研究，静态吸附和柱吸附-脱附试验。平衡吸附等温线的结果表明，吸附行为符合Langmuir模型。该复合泡沫在柱吸附过程中尺寸稳定，洗脱后可重复使用。3次循环后，MB的去除率仍接近90%。此外，还探讨了复合泡沫材料对其他无机或有机污染物的吸附性能。因此，这种新型复合泡沫材料具有尺寸稳定性好、对阳离子污染物吸附能力强、吸附容量大、易于再生等优点，是一种理想的水污染物吸附剂。
A novel graphene oxide/chitin nanofibrils (GO–CNF) composite foam as a column adsorbent was prepared for aqueous contaminant disposal. The structures, morphologies and properties of composite foams supported by nanofibrils were characterized. As a special case, the adsorption of methylene blue (MB) on GO–CNF was investigated regarding the static adsorption and column adsorption–desorption tests. Results from equilibrium adsorption isotherms indicated that the adsorption behavior was well-fitted to Langmuir model. The composite foams reinforced by CNF were dimensionally stable during the column adsorption process and could be reused after elution. The removal efficiency of MB was still nearly 90% after 3 cycles. Furthermore, other inorganic or organic pollutants adsorbed by composite foams were also explored. Therefore, this novel composite foam with remarkable properties such as dimensional stability, universal adsorbent for cationic pollutants, high adsorption capacity, and ease of regeneration was a desirable adsorbent in the future practical application of water pollutant treatment.