Comparison of alkali modified fly ash and alkali activated fly ash as Zn(II) ions adsorbent from aqueous solution

IF 1.4 4区材料科学 Q3 MATERIALS SCIENCE, CERAMICS Science of Sintering Pub Date : 2022-01-01 DOI:10.2298/sos2201049p

A. Purbasari, D. Ariyanti, S. Sumardiono, Muhammad Shofa, Reinhard Manullang

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引用次数: 5

Abstract

Fly ash which is solid waste can be used as an adsorbent for wastewater treatment. Alkali modification and alkali activation on fly ash can increase the adsorption capacity of fly ash. In this study, alkali modified fly ash and alkali activated fly ash were used as Zn(II) ions adsorbents. The effect of adsorption time and initial concentration of Zn(II) ions was studied, as well as the kinetics and isotherm adsorption. The results showed that the removal efficiency of Zn(II) ions by alkali activated fly ash is higher than that by alkali modified fly ash. The adsorptions of Zn(II) ions by alkali modified fly ash and by alkali activated fly ash have reached equilibrium after two hours. The increase of initial concentration of Zn(II) ions would decrease the removal efficiency with both alkali modified fly ash and alkali activated fly ash. Adsorptions of Zn(II) ions by both alkali modified fly ash and alkali activated fly ash tend to follow pseudo second order kinetics model and Langmuir isotherm model with maximum adsorption capacity of 62.696 mg/g and 66.667 mg/g, respectively.

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碱改性粉煤灰与碱活化粉煤灰作为水溶液中Zn(II)离子吸附剂的比较

粉煤灰是一种固体废物，可作为吸附剂处理废水。对粉煤灰进行碱改性和碱活化可以提高粉煤灰的吸附能力。本研究采用碱改性粉煤灰和碱活化粉煤灰作为Zn(II)离子吸附剂。研究了Zn(II)离子的吸附时间、初始浓度以及吸附动力学和等温吸附的影响。结果表明，碱活性粉煤灰对Zn(II)离子的去除率高于碱改性粉煤灰。碱改性粉煤灰和碱活化粉煤灰对Zn(II)离子的吸附作用在2 h后达到平衡。碱改性粉煤灰和碱活化粉煤灰对Zn(II)离子的去除率均随着初始浓度的增加而降低。碱改性粉煤灰和碱活化粉煤灰对Zn(II)离子的吸附均服从拟二级动力学模型和Langmuir等温模型，最大吸附量分别为62.696 mg/g和66.667 mg/g。

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来源期刊

Science of Sintering 工程技术-材料科学：硅酸盐

CiteScore

2.50

自引率

46.70%

发文量

审稿时长

3.3 months

期刊介绍： Science of Sintering is a unique journal in the field of science and technology of sintering. Science of Sintering publishes papers on all aspects of theoretical and experimental studies, which can contribute to the better understanding of the behavior of powders and similar materials during consolidation processes. Emphasis is laid on those aspects of the science of materials that are concerned with the thermodynamics, kinetics and mechanism of sintering and related processes. In accordance with the significance of disperse materials for the sintering technology, papers dealing with the question of ultradisperse powders, tribochemical activation and catalysis are also published. Science of Sintering journal is published four times a year. Types of contribution: Original research papers, Review articles, Letters to Editor, Book reviews.