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将废调色剂粉末回收用作吸附剂去除水中重金属

Recycling of Waste Toner Powder as Adsorbent to Remove Aqueous Heavy Metals.

作者信息

Fernández Begoña, Ayala Julia, Del Valle Elena, Martínez-Blanco David, Castañón Ana María, Menéndez-Aguado Juan M

机构信息

Departamento de Ciencia de Materiales e Ingeniería Metalúrgica, Universidad de Oviedo, c/Independencia 13, 33004 Oviedo, Spain.

Departamento de Física, Facultad de Ciencias, Universidad de Oviedo, Calvo Sotelo s/n, 33007 Oviedo, Spain.

出版信息

Materials (Basel). 2022 Jun 10;15(12):4150. doi: 10.3390/ma15124150.

DOI:10.3390/ma15124150
PMID:35744209
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9230598/
Abstract

The removal of Cd, Zn and Ni from metal solutions onto waste toner power (WTP) was investigated. The influence of parameters such as pH, contact time, initial metal concentration and adsorbent dosage was studied in batch adsorption experiments. Batch equilibrium experiments showed that the highest removal efficiency for Zn and Cd occurs at pH 7, while pH 5 is the most suitable for Ni removal. The amount of metal removed (mg/g) improved when increasing the initial concentration, and sorption of heavy metals reached equilibrium in 24 h. Metals' uptake increased with increasing adsorbent dosage. The adsorption isotherms of Zn, Cd and Ni onto WTP fit the Langmuir better than the Freundlich model with correlation coefficient R values ranging from 0.998 to 0.968 and 0.989 to 0.881, respectively. The data showed that the maximum adsorption capacity of heavy metals, a, ranged from 2.42 to 1.61 mg/g, from 6.22 to 2.01 mg/g and from 3.49 to 2.56 mg/g for Ni, Zn and Cd, respectively, with the three WTPs used in this study. This adsorbent can potentially be used to remove metal ions from wastewater.

摘要

研究了将金属溶液中的镉、锌和镍去除到废调色剂粉末（WTP）上的情况。在批量吸附实验中研究了pH值、接触时间、初始金属浓度和吸附剂用量等参数的影响。批量平衡实验表明，锌和镉的最高去除效率出现在pH值为7时，而pH值为5最适合去除镍。增加初始浓度时，去除的金属量（mg/g）有所提高，重金属的吸附在24小时内达到平衡。金属的吸附量随吸附剂用量的增加而增加。锌、镉和镍在WTP上的吸附等温线比Freundlich模型更符合Langmuir模型，相关系数R值分别在0.998至0.968和0.989至0.881之间。数据表明，本研究中使用的三种WTP对镍、锌和镉的重金属最大吸附容量a分别为2.42至1.61mg/g、6.22至2.01mg/g和3.49至2.56mg/g。这种吸附剂有可能用于去除废水中的金属离子。

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