利用纳米灰叶藻(NPCLA)去除水溶液中的镉

IF 1.3 Q4 ENVIRONMENTAL SCIENCES
M. Pourjaafar, A. Askari, A. Salehi Sahl Abadi, B. Anvaripour, Afshar Nemati, S. A. Rahimi, Mona Pourjafar
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引用次数: 0

摘要

背景:重金属污染已成为最严重的环境问题之一,因此,本研究旨在研究水溶液中镉的去除。方法:采用纳米灰松叶灰(NPCLA)作为吸附剂对水溶液中的镉进行吸附。接触时间、溶液的初始pH、吸附剂用量和初始Cd(II)浓度被认为是影响Cd去除效率的参数。实验采用专家设计软件进行设计。结果:NPCLA用量为2.45gL-1,pH为6.3,初始Cd(II)浓度为20.7mgL-1,接触时间为60min,是实验领域中去除Cd(Ⅱ)的最佳条件,在该最佳条件下,去除效率的预测值为99.9%,Cd(II)在NPCLA上的吸附体系和实验数据遵循准二阶动力学模型。研究了Freundlich、Langmuir、Brunauer-Emmett-Teller(BET)和Temkin等温线模型。平衡吸附数据与线性变换的Langmuir等温线拟合良好,相关系数为R2=0.9877,NPCLA的最大吸附容量为25.25mg-1。结论:在实验室条件下,NPCLA能高效去除水溶液中的镉。因此,由于该装置的可用性和廉价性,NPCLA可以被认为是在工业规模上生产吸附剂的合适选择。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Removal of cadmium from aqueous solution using nano Prosopis cineraria leaf ash (NPCLA)
Background: Heavy metal pollution has become one of the most severe environmental problems, therefore, the present study was conducted to investigate removal of cadmium (Cd) from aqueous solution. Methods: In the present study, nano Prosopis cineraria leaf ash (NPCLA) was used as an adsorbent for removing Cd from aqueous solution. Contact time, initial pH of the solutions, sorbent dosages, and initial Cd (II) concentration were considered as parameters affecting Cd removal efficiency. The experiments were designed by Design of Expert (DOE) software. Results: It was revealed that an NPCLA dosage of 2.45 gL-1, pH of 6.3, and initial Cd (II) concentration of 20.7 mgL-1 in contact time of 60 min was the optimum condition for removal of Cd (II) in the domain of experiments and at this optimum condition, the prediction value of removal efficiency was found 99.9%. Based on the results of kinetics experiments, the sorption system and experiment data of Cd (II) adsorption on the NPCLA followed the pseudo-second-order kinetic model. Freundlich, Langmuir, Brunauer-Emmett-Teller (BET), and Temkin isotherm models were investigated. The equilibrium adsorption data were fitted well with linearly transformed Langmuir isotherm with a correlation coefficient of R2=0.9877, and the maximum sorption capacity of NPCLA was obtained to be 25.25 mgg-1. Conclusion: In laboratory conditions, NPCLA can remove Cd from aqueous solution with a high efficiency. Therefore, due to this plant’s availability and cheapness, NPCLA can be considered a suitable option for producing adsorbents on industrial scales.
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来源期刊
CiteScore
2.40
自引率
37.50%
发文量
17
审稿时长
12 weeks
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