| 项淑婷,杨潇,刘思言,张有军,王德宁,从辉,李绍健,阎秀兰.球磨处理对天然碱性矿物微观结构及镉吸附性能的影响[J].农业环境科学学报,2025,44(12):3095-3107. |
| 球磨处理对天然碱性矿物微观结构及镉吸附性能的影响 |
| Effects of ball milling treatment on the microstructure and cadmium adsorption properties of natural alkaline minerals |
| 投稿时间：2024-11-23 |
| DOI：10.11654/jaes.2024-1020 |
| 中文关键词: 天然碱性矿物 球磨 吸附 镉（Cd） 吸附机理 |
| 英文关键词: natural alkaline mineral ball milling adsorption cadmium adsorption mechanism |
| 基金项目:国家自然科学基金联合基金项目（U21A2023）；天津市科技计划项目（22YFYSHZ00310）；国家留学基金委员会项目（202304910160） |
| 作者 | 单位 | E-mail | | 项淑婷 | 中国科学院地理科学与资源研究所, 陆地表层格局与模拟院重点实验室, 北京 100101
中国科学院大学, 北京 100049 | | | 杨潇 | 中国科学院地理科学与资源研究所, 陆地表层格局与模拟院重点实验室, 北京 100101 | | | 刘思言 | 中国科学院地理科学与资源研究所, 陆地表层格局与模拟院重点实验室, 北京 100101
中国科学院大学, 北京 100049 | | | 张有军 | 天津华北地质勘查总院有限公司, 天津 300170 | | | 王德宁 | 国家石油天然气管网集团有限公司, 北京 100028 | | | 从辉 | 天津华北地质勘查总院有限公司, 天津 300170 | | | 李绍健 | 河北省石家庄平山县林业局, 石家庄 050400 | | | 阎秀兰 | 中国科学院地理科学与资源研究所, 陆地表层格局与模拟院重点实验室, 北京 100101 | yanxl@igsnrr.ac.cn |
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| 中文摘要: |
| 为强化天然海泡石对镉的吸附性能，本实验以河北省某天然海泡石矿区原料为研究对象，采用干法球磨法对其进行改性处理，并综合利用多种表征技术，系统探究了不同球磨速度（BM1：300 r·min-1、BM2：450 r·min-1、BM3：600 r·min-1、BM4：750 r·min-1）对天然碱性矿物微观结构及镉吸附能力的影响。通过改变 pH、Cd（Ⅱ）溶液浓度、吸附时间、共存离子等条件参数，明确了不同球磨处理碱性矿物对Cd（Ⅱ）的静态吸附行为和强化除镉能力的作用机制。结果表明：提高球磨转速可增大天然碱性矿物材料的比表面积并改善其孔道结构，且随着球磨转速增大，材料表面的电负性增强。BM3的镉吸附性能最佳，镉吸附量可达 37.27mg·g-1，是原状天然碱性矿物的18.18倍。球磨处理使得材料表面产生了大量π-π*，其可与镉形成Cd（Ⅱ）-π键。同时，高能球磨可使材料颗粒细化，提高材料表面钙镁原子比，有利于提升镉与钙镁离子的离子交换能力。研究表明，BM3不仅在较宽的 pH变化范围内表现出优异的镉吸附能力，当Mg2+、Cl-和SO42-存在时，BM3对Cd（Ⅱ）仍能保持较好的去除率，这说明球磨处理在改善天然碱性矿物吸附性能方面具有良好的应用前景。 |
| 英文摘要: |
| To enhance the adsorption capacity of natural alkaline minerals for Cd（Ⅱ）, dry ball milling was used to develop adsorbent materials. The effects of different ball milling speeds（BM1：300 r·min-1, BM2：450 r·min-1, BM3：600 r·min-1, BM4：750 r·min-1）on the microstructure of natural alkaline minerals and the adsorption capacity of Cd（Ⅱ）were investigated systematically by utilizing a variety of characterization techniques. The adsorption behavior and mechanism of Cd（Ⅱ）adsorption by alkaline minerals with different ball milling treatments were investigated by varying the condition parameters such as pH, Cd（Ⅱ）solution concentration, adsorption time and coexisting ions. The results showed that increasing the rotational speed of ball milling could increase the specific surface area and improve the pore structure of the natural alkaline mineral materials. The electronegativity of the surface of the materials was enhanced by increasing the rotational speed of ball milling. The best adsorption performance of cadmium on ball milling material（BM3）was achieved under the condition of 600 r·min-1, and the adsorption amount was up to 37.27 mg·g-1, which is 18.18 times of that of the natural alkaline minerals in original state. The ball milling treatment resulted in a large number of π-π* on the surface of the material, which can form Cd（Ⅱ）- π bonds. Meanwhile, high-energy ball milling can refine the material particles. With the increase of rotational speed, the ratio of calcium to magnesium atoms on the surface of the material increased, which was conducive to the enhancement of the ion-exchange capacity between cadmium and calcium and magnesium ions. BM3 not only exhibited excellent cadmium adsorption capacity over a wide range of pH variations, but also still maintained a good removal rate of Cd（Ⅱ）, when Mg2+、Cl- and SO42- were present, which suggested that the ball milling treatment had a good application prospect in improving the adsorption performance of natural alkaline minerals. |
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