改性粉煤灰去除水中铅、镉的可能性

IF 2.8 4区工程技术 Q2 CHEMISTRY, APPLIED

Adsorption Science & Technology Pub Date : 2021-08-13 DOI:10.1155/2021/1336638

X. Chen, Guibin Zhang, Jingtian Li, P. Ji

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引用次数: 7

摘要

本研究采用氢氧化钠对粉煤灰进行改性，制备了一种新型的吸附材料（IP），用于处理Pb2+和Cd2+污染的废水。考察了制备工艺参数（FA/NaOH质量比和改性温度）对IP吸附性能的影响。结果表明，当FA/NaOH质量比为1时，IP4表现出最高的吸附能力 : 2，焙烧温度为250°C。通过SEM、EDX、XRD和FTIR分析对IP4进行了表征。结果表明，FA的表面形貌和微观结构发生了显著变化。此外，为了研究Pb2+和Cd2+在IP4上的吸附性能，分析了Pb2+和Cd2+的不同初始浓度、pH和接触时间，结果表明IP4对重金属具有优异的吸附能力。此外，动力学模型结果表明，Pb2+和Cd2+在IP4上的吸附行为可以用拟二阶模型更好地描述。

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Possibility of Removing Pb and Cd from Polluted Water by Modified Fly Ash

In this study, fly ash (FA) was modified by sodium hydroxide to prepare a new adsorption material (IP) and treat Pb2+- and Cd2+-polluted wastewater. The effect of preparation parameters (mass ratio of FA/NaOH and modification temperature) on IP adsorption performance was investigated. The results indicated that the IP4 showed the highest adsorption capacity prepared at the FA/NaOH mass ratio of 1 : 2 and the roasting temperature of 250°C. The IP4 was characterized by SEM, EDX, XRD, and FTIR analyses. The results showed that the surface morphology and microstructure of FA were significantly changed. Furthermore, in order to study the adsorption performance of Pb2+ and Cd2+ on IP4, the different initial concentrations of Pb2+ and Cd2+, pH, and contact time were analyzed, and the results indicated that IP4 has excellent adsorption capacity for heavy metals. In addition, kinetic model results demonstrated that the adsorption behavior of Pb2+ and Cd2+ on IP4 was better described by a pseudo-second-order model.

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来源期刊

Adsorption Science & Technology 工程技术-工程：化工

CiteScore

5.00

自引率

10.30%

发文量

181

审稿时长

4.5 months

期刊介绍： Adsorption Science & Technology is a peer-reviewed, open access journal devoted to studies of adsorption and desorption phenomena, which publishes original research papers and critical review articles, with occasional special issues relating to particular topics and symposia.