| 杨佳音,张兴萍,李海朝.化学通报,2023,86(11):1383-1388,1382. |
| 氯化锂活化制备活性炭及吸附锂离子性能研究 |
| Preparation and adsorption of lithium ions of activated carbon by activation of lithium chloride |
| 投稿时间：2023-04-20 修订日期：2023-05-23 |
| DOI： |
| 中文关键词: 活性炭 氯化锂 表征 吸附 锂离子 |
| 英文关键词:activated carbon lithium chloride characterization adsorption lithium- ion |
| 基金项目:青海省重点研发与转化计划项目(2022-QY-210)和青海民族大学研究生创新项目资助 |
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| 中文摘要: |
| 采用化学活化法，用猪血粉为前驱体和新型活化剂氯化锂活化制备锂离子活性炭（LB-AC）并进行吸附锂离子研究。用氯化锂对猪血粉进行活化后我们得到比表面积为695 m2?g-1，总孔体积为0.3 cm3?g-1的LB-AC。通过扫描电子显微镜、元素分析、X 射线衍射分析和红外光谱分析等分析手段对LB-AC表面形貌和表面基团进行表征。吸附?解吸实验结果表明，随着温度升高，锂离子的吸附容量随之增加，表明LB-AC对锂离子的吸附是一种吸热反应。当温度增加至35 ℃和45 ℃时，其吸附容量分别增加至1.41 mg?g-1和1.52 mg?g-1。锂离子的初始浓度增加，吸附容量也增加。锂的脱附随着盐酸浓度的升高而增加。LB-AC对锂离子的选择性很高，且吸附剂在碱性环境下吸附容量更高，在酸性环境下基本不吸附。 |
| 英文摘要: |
| Using pig blood meal as precursor and lithium chloride as a novel activator, Li-ion activated carbon (LB-AC) was prepared by chemical activation method and lithium-ions adsorption was studied. LB-AC with a specific surface area of 695 m2?g-1 and a total pore volume of 0.3 cm3?g-1 was obtained by activation of porcine blood meal with lithium chloride. The surface morphology and surface groups of LB-AC have been characterized by scanning electron microscopy, elemental analysis, X-ray diffraction analysis, and infrared absorption spectrometry. The results of adsorption- desorption analysis experiments show that the adsorption capacity of lithium-ions increases with temperature, suggesting that the adsorption of lithium ions by LB-AC is an endothermic reaction. The temperature increased to 35 ℃ and 45 ℃, the adsorption capacity increased to 1.41 mg?g-1 and 1.52 mg?g-1, respectively. As the initial concentration of lithium-ions increases, the adsorption capacity also increases. Desorption of lithium increases with the concentration of hydrochloric acid. LB-AC has a high selectivity for lithium-ions, and the adsorbent has a higher adsorption capacity in alkaline environments, but essentially does not adsorb in acidic environments. |
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