十六烷基三甲基溴化铵改性的松果壳磁性生物炭对酸性铬蓝 K 的高效去除。
Cetyl trimethyl ammonium bromide modified magnetic biochar from pine nut shells for efficient removal of acid chrome blue K.
机构信息
College of Chemistry and Chemical Engineering, Xianyang Normal University, Xianyang 712000, China.
College of Chemistry and Chemical Engineering, Xianyang Normal University, Xianyang 712000, China.
出版信息
Bioresour Technol. 2020 Sep;312:123564. doi: 10.1016/j.biortech.2020.123564. Epub 2020 May 22.
Biochar was prepared by rapid pyrolysis using pine nut shell as raw materials. Then cetyl trimethyl ammonium bromide modified magnetic biochar material (CTAB-MC) was obtained after modifying biochar by FeCl and cetyl trimethyl ammonium bromide. The CTAB-MC was characterized by SEM, FTIR, XRD and Magnetic analyses. Adsorptive property of the CTAB-MC for acid chrome blue K (AK) was studied. It was found that adsorption capacity was affected by solution pH, temperature, adsorption time, initial concentration and ionic strength. The CTAB-MC showed higher adsorption ability toward acid chrome blue K, which was up to 40% higher than that of MC. The experimental results showed that adsorption data of AK on the CTAB-MC well conformed to the Langmuir isotherm adsorption model and the pseudo-second order kinetic model. The CTAB-MC can be recycled three times. This work reveals that CTAB-MC is a promising adsorbent with broad application prospects.
生物炭是由快速热解松仁壳制成的。然后，通过用 FeCl 和十六烷基三甲基溴化铵改性生物炭，得到十六烷基三甲基溴化铵改性磁性生物炭材料（CTAB-MC）。通过 SEM、FTIR、XRD 和磁分析对 CTAB-MC 进行了表征。研究了 CTAB-MC 对酸性铬蓝 K（AK）的吸附性能。结果表明，吸附容量受溶液 pH 值、温度、吸附时间、初始浓度和离子强度的影响。CTAB-MC 对酸性铬蓝 K 表现出更高的吸附能力，比 MC 高 40%。实验结果表明，AK 在 CTAB-MC 上的吸附数据很好地符合 Langmuir 等温吸附模型和准二级动力学模型。CTAB-MC 可以回收三次。这项工作表明 CTAB-MC 是一种具有广阔应用前景的有前途的吸附剂。
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