制备二醛纤维素接枝氧化石墨烯复合材料及其对水溶液中重金属的吸附行为。
Preparation of dialdehyde cellulose graftead graphene oxide composite and its adsorption behavior for heavy metals from aqueous solution.
机构信息
State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong Province 250353, PR China; School of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong Province 250353, PR China.
State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong Province 250353, PR China; School of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong Province 250353, PR China.
出版信息
Carbohydr Polym. 2019 May 15;212:345-351. doi: 10.1016/j.carbpol.2019.02.052. Epub 2019 Feb 18.
A novel adsorbent GO-TETA-DAC was synthesized by using dialdehyde cellulose (DAC) grafted graphene oxide (GO) with triethylenetetramine (TETA) acted as cross-linking reagent. The product was characteristics by FT-IR, BET and SEM, results proved the preparation process was successful. GO-TETA-DAC was applied to disposal Cu (II) and Pb (II) ions from aqueous solution and achieved excellent performance. The maximum adsorption capacity 65.1 and 80.9 mg/g for Cu(II) and Pb(II) when pH was 5.0. Adsorption isotherm and kinetics revealed the adsorption process complied with Langmuir model and pseudo-second-order model. Furthermore, the reusability of GO-TETA-DAC was also explored, the adsorption efficiency can still over 77% even after four times of recycling.
一种新型吸附剂 GO-TETA-DAC 通过使用三乙烯四胺（TETA）作为交联试剂接枝氧化石墨烯（GO）的二醛纤维素（DAC）合成。通过 FT-IR、BET 和 SEM 对产物进行了特征分析，结果证明了制备过程的成功。GO-TETA-DAC 被应用于从水溶液中处理 Cu（II）和 Pb（II）离子，并表现出优异的性能。当 pH 值为 5.0 时，对 Cu（II）和 Pb（II）的最大吸附容量分别为 65.1 和 80.9 mg/g。吸附等温线和动力学表明，吸附过程符合朗缪尔模型和拟二级模型。此外，还探索了 GO-TETA-DAC 的可重复使用性，即使经过四次回收，吸附效率仍能超过 77%。
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