高效水热法生物炭从蜂蜜中提取水溶液中的铅（II）。
Adsorption of Lead (II) from Aqueous Solution with High Efficiency by Hydrothermal Biochar Derived from Honey.
机构信息
State Key Laboratory of Environment-Friendly Energy Materials, School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China.
College of Nuclear Technology and Automation Engineering, Chengdu University of Technology, Chengdu 610059, China.
出版信息
Int J Environ Res Public Health. 2020 May 15;17(10):3441. doi: 10.3390/ijerph17103441.
A novel natural honey hydrothermal biochar (HHTB) was prepared using natural honey as raw material. The as-prepared adsorbent was applied to adsorb Pb from aqueous solution and characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy to investigate the structure and morphology change of the adsorbent before and after Pb adsorption. The influence of the pH, initial Pb concentration, temperature, and contact time on the adsorption of Pb was systematically investigated. The results revealed that the adsorption capacity for Pb is up to 133.2 mg·g at initial pH of 5.0 and adsorption temperature of 298 K. Meanwhile, the adsorption of Pb on HHTB can be well fitted by the pseudo-second-order model and Langmuir isotherm model. The adsorbent had great selectivity for Pb from the aqueous solution containing coexisting ions including Cd, Co, Cr, Cu, Ni and Zn. Furthermore, the adsorption of Pb on HHTB was attributed to complexation coordination, where it involved hydroxyl and carboxylic groups on HHTB in the process of adsorption of Pb.
一种新型天然蜂蜜水热生物炭（HHTB）被制备出来，使用天然蜂蜜作为原料。所制备的吸附剂被应用于从水溶液中吸附 Pb，并通过扫描电子显微镜、傅里叶变换红外光谱和 X 射线光电子能谱对吸附前后吸附剂的结构和形貌变化进行了表征，以研究 pH、初始 Pb 浓度、温度和接触时间对 Pb 吸附的影响。结果表明，在初始 pH 为 5.0 和吸附温度为 298 K 时，Pb 的吸附容量高达 133.2 mg·g。同时，Pb 在 HHTB 上的吸附可以很好地拟合伪二级模型和 Langmuir 等温线模型。该吸附剂对水溶液中存在的 Cd、Co、Cr、Cu、Ni 和 Zn 等共存离子具有很好的选择性。此外，Pb 在 HHTB 上的吸附归因于配位络合，其中涉及 HHTB 上的羟基和羧基在吸附 Pb 的过程中。
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