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郑州师范学院 化学化工学院,河南 郑州 450044
高海荣(1973-), 女, 副教授, 硕士, 主要从事环境分析及应用的研究。E⁃mail: gaohairong2004@163.com。
收稿:2025-10-27,
网络首发:2026-07-31,
纸质出版:2026-08-31
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高海荣, 韩玟玟, 刘晓乐, 等. 茶叶生物炭磁性材料对水中重金属铬的超声吸附研究[J]. 中北大学学报(自然科学版), 2026, 47(4): 491-499.
Gao Hairong, Han Wenwen, Liu Xiaole, et al. Study on the ultrasonic adsorption of Cr(Ⅵ) in water by tea biochar magnetic materials[J]. Journal of North University of China(Natural Science Edition), 2026, 47(4): 491-499.
高海荣, 韩玟玟, 刘晓乐, 等. 茶叶生物炭磁性材料对水中重金属铬的超声吸附研究[J]. 中北大学学报(自然科学版), 2026, 47(4): 491-499. DOI: 10.62756/jnuc.issn.1673-3193.2025.10.0023.
Gao Hairong, Han Wenwen, Liu Xiaole, et al. Study on the ultrasonic adsorption of Cr(Ⅵ) in water by tea biochar magnetic materials[J]. Journal of North University of China(Natural Science Edition), 2026, 47(4): 491-499. DOI: 10.62756/jnuc.issn.1673-3193.2025.10.0023.
采用共沉淀法合成了茶叶生物炭磁性材料, 并进行了FT-IR和XRD表征, 将其应用于废水中重金属Cr(Ⅵ)的超声去除研究, 探究了反应条件对材料吸附Cr(Ⅵ)效果的影响, 并对其吸附过程进行了动力学和等温吸附拟合。研究结果表明: 室温下, 最优吸附条件为pH=1、 吸附剂用量0.025 g、 质量浓度60 mg·L
-1
、 超声功率250 W、 超声时间40 min。在该条件下Cr(Ⅵ)的去除率为90.93%, 吸附量为43.64 mg·g
-1
, 三次重复利用去除率仍可达70.91%。该吸附过程符合准二级动力学吸附方程和Langmuir等温吸附模型, 为单分子层化学吸附, 螯合作用及静电作用是吸附的主要机制。该材料制备工艺简单、 原料廉价易得, 对水体Cr(Ⅵ)有较高的吸附容量且便于磁回收, 在绿色化治理水环境重金属污染方面有着潜在的应用价值。
Tea biochar magnetic materials were synthesized by co-precipitation method and characterized by FT-IR and XRD, and applied to the study of Cr(Ⅵ) removal from aqueous solution. The effects of reaction conditions on Cr(Ⅵ) adsorption were investigated, and the kinetics and isothermal adsorption fitting of its adsorption process were carried out. The results showed that at room temperature, the optimal adsorption conditions were pH=1, adsorbent dosage of 0.025 g, mass concentration 60 mg·L
-1
, ultrasonic power 250 W, and ultrasonic time 40 min. Under thes
e condition, the removal rate of Cr(Ⅵ) was 90.93%, with adsorption capacity of 43.64 mg·g
-1
. The removal rate can still reach 70.91% after three cycles. This adsorption process conforms to the quasi-second-order kinetic adsorption equation and the Langmuir isothermal adsorption model, which is a monolayer chemical adsorption. Chelation and electrostatic interaction are the main adsorption mechanisms. This material has a simple preparation process, cheap and easy raw materials, a high adsorption capacity for Cr(Ⅵ) in water and is convenient for magnetic recovery. It has potential application value in the green treatment of heavy metal pollution in water.
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