使用乙二胺四乙酸/氧化石墨烯功能化玉米芯高效去除结晶紫染料：一种新型低成本吸附剂
Efficient removal of crystal violet dye using EDTA/graphene oxide functionalized corncob: a novel low cost adsorbent.
作者信息
Wang Huan, Lai Xin, Zhao Wei, Chen Youning, Yang Xiaoling, Meng Xiaohua, Li Yuhong
机构信息
College of Chemistry and Chemical Engineering, Xianyang Normal University Xianyang 712000 China
出版信息
RSC Adv. 2019 Jul 16;9(38):21996-22003. doi: 10.1039/c9ra04003j. eCollection 2019 Jul 11.
In this study, EDTA functionalized corncob (EDTA-corncob) and EDTA/graphene oxide functionalized corncob (EDTA-GO/corncob) were prepared using disodium ethylenediamine tetraacetic acid and the graphene oxide immersion method. EDTA-corncob and EDTA-GO/corncob were characterized by SEM and FTIR spectroscopy. On this basis, the adsorption properties of EDTA-corncob and EDTA-GO/corncob were studied with crystal violet as the adsorbate. The optimum adsorption conditions were determined by the effect of samples on the adsorption properties of crystal violet at different times, temperatures and pH, and the reusability of the samples was studied. The results showed that adsorption capacity of crystal violet on EDTA-GO/corncob was higher compared with natural corncob and EDTA-corncob. The most suitable pH value of the solution is about 6.0, the adsorption equilibrium time is 200 min. EDTA-GO/corncob can be reused eight times. This study indicated that EDTA-GO/corncob is a reusable adsorbent for rapid, low-cost, and efficient removal of dye from waste water.
在本研究中，使用乙二胺四乙酸二钠和氧化石墨烯浸渍法制备了乙二胺四乙酸（EDTA）功能化玉米芯（EDTA-玉米芯）和EDTA/氧化石墨烯功能化玉米芯（EDTA-GO/玉米芯）。通过扫描电子显微镜（SEM）和傅里叶变换红外光谱（FTIR）对EDTA-玉米芯和EDTA-GO/玉米芯进行了表征。在此基础上，以结晶紫为吸附质，研究了EDTA-玉米芯和EDTA-GO/玉米芯的吸附性能。通过考察样品在不同时间、温度和pH值下对结晶紫吸附性能的影响，确定了最佳吸附条件，并研究了样品的可重复使用性。结果表明，与天然玉米芯和EDTA-玉米芯相比，结晶紫在EDTA-GO/玉米芯上的吸附容量更高。溶液最适宜的pH值约为6.0，吸附平衡时间为200分钟。EDTA-GO/玉米芯可重复使用八次。本研究表明，EDTA-GO/玉米芯是一种可重复使用的吸附剂，可快速、低成本且高效地从废水中去除染料。
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