风信子叶粉对 Cu(II) 离子的生物吸附：工艺性能、动力学和生物吸附等温线

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-03-14 DOI:10.3311/ppch.22867

R. Ratnawati, A. Prasetyaningrum, H. Hargono, Muhammad Fahmi Zakaria

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引用次数: 0

摘要

水葫芦叶粉（WH）用于吸附废水中的铜（II）。通过硫酸（A-WH）和氢氧化钠（B-WH）处理对布袋莲叶粉进行改性。在不同的初始 pH 值、初始 Cu（II）浓度和生物分解时间下对生物吸附进行了研究。结果表明，生物吸附剂的生物吸附能力随初始铜（II）浓度的增加而增加。WH、A-WH 和 B-WH 的最佳生物吸附 pH 值分别为 7.5、7.0 和 7.5。原始和处理过的 WH 的扫描电镜图像显示，碱处理比酸处理更能去除木质素，B-WH 比 A-WH 留下了更多的大孔。对木质素叶片进行酸处理和碱处理可提高木质素叶片对铜（II）的生物吸附能力。伪二阶动力学模型比伪一阶模型更能代表生物吸附的动态行为。在描述生物吸附等温线方面，Langmuir 模型优于 Freundlich 模型。根据 Langmuir 模型预测，WH、A-WH 和 B-WH 的最大生物吸附容量分别为 14.92 mg g-1、18.32 mg g-1 和 23.27 mg g-1。

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Biosorption of Cu(II) Ions by Water Hyacinth Leaf Powder: Process Performance, Kinetics, and Biosorption Isotherm

The water hyacinth leaf powder (WH) was used to adsorb Cu(II) from wastewater. The WH was modified through sulfuric acid (A-WH) and sodium hydroxide (B-WH) treatments. The biosorption was studied with various initial pH, initial Cu(II) concentrations, and biosorp-tion time. The results show that the biosorption capacities of the biosorbents increase with the initial Cu(II) concentration. The optimum pH for the biosorption was 7.5, 7.0, and 7.5 for the WH, A-WH, and B-WH, respectively. The SEM images of the raw and treated WH revealed that alkali treatment could remove lignin more than the acid treatment, leaving more macropores in the B-WH than in the A-WH. The acid and alkali treatments to the WH leaf increase the biosorption capacity of the WH for Cu (II). The pseudo-second-order kinetic model can represent the dynamic behavior of the biosorption better than the pseudo-first-order model. The Langmuir model is better than the Freundlich model for describing the biosorption isotherm. The maximum biosorption capacities of the biosorbents predicted by the Langmuir model were 14.92 mg g−1, 18.32 mg g−1, and 23.27 mg g−1 for WH, A-WH, and B-WH, respectively.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.