Enhanced adsorption of Cr(VI) from wastewater by utilizing sludge and reed to prepare ceramsite modified with Fe3O4

IF 3.8 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS Journal of the American Ceramic Society Pub Date : 2024-12-11 DOI:10.1111/jace.20291

Xin Gao, Shouwei Jian, Baodong Li, Jianxiang Huang, Fei Dai, Bo Peng, Xinxin He, Jiaxuan Chen

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Abstract

A large amount of wastewater containing Cr(VI) is highly toxic and harmful to the environment, which requires effective treatment. In this study, an adsorbed ceramsite was prepared from dredged sludge (DS) and reed powder (RP). Then the prepared ceramsite was introduced Fe₃O₄ magnetic functional groups by a simple hydrothermal method to enhance the adsorption of Cr(VI) from wastewater. Batch adsorption experiments of Fe₃O₄-modified ceramsite (FCS) to remove Cr(VI) were studied systematically. Effects of different contact time, adsorbent mass and initial Cr(VI) concentration on Cr(VI) removal efficiency were investigated and optimized by a response surface methodology. The results show that when the loading content of Fe₃O₄ is 30% (FCS-0.3), the highest removal efficiency of Cr(VI) reached 88.48%, and the Cr(VI) adsorbed process can be well described by pseudo-second-order kinetics and Langmuir model, indicating that adsorption process is a chemisorption and monolayer adsorption. Moreover, the FTIR, XPS and Zeta potential analysis further revealed the mechanism of efficient removal of Cr(VI) by Fe₃O₄ loaded onto the ceramsite to increase the specific surface area and functional groups to adsorb Cr(VI). This study provides an effective method to convert solid waste such as DS and RP into a highly efficient magnetic adsorbent to adsorb and remove Cr(VI) from wastewater.

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利用污泥和芦苇制备Fe3O4改性陶粒增强对废水中Cr（VI）的吸附

大量含Cr（VI）的废水对环境具有高毒性和危害性，需要进行有效处理。本研究以疏浚污泥（DS）和芦苇粉（RP）为原料制备了吸附陶粒。然后用简单的水热法将制备的陶粒引入Fe3O4磁性官能团，以增强对废水中Cr（VI）的吸附。系统地研究了fe3o4改性陶粒（FCS）对Cr（VI）的批量吸附实验。采用响应面法研究了不同接触时间、吸附剂质量和初始浓度对Cr（VI）去除效果的影响。结果表明：当Fe3O4负载量为30% （FCS-0.3）时，Cr（VI）的最高去除率达到88.48%,Cr（VI）的吸附过程可以用拟二级动力学和Langmuir模型很好地描述，表明吸附过程为化学吸附和单层吸附。此外，FTIR、XPS和Zeta电位分析进一步揭示了将Fe3O4负载在陶粒上以增加比表面积和官能团吸附Cr（VI）的机理。本研究提供了一种将DS和RP等固体废物转化为高效磁性吸附剂吸附去除废水中Cr（VI）的有效方法。

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来源期刊

Journal of the American Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

7.50

自引率

7.70%

发文量

590

审稿时长

2.1 months

期刊介绍： The Journal of the American Ceramic Society contains records of original research that provide insight into or describe the science of ceramic and glass materials and composites based on ceramics and glasses. These papers include reports on discovery, characterization, and analysis of new inorganic, non-metallic materials; synthesis methods; phase relationships; processing approaches; microstructure-property relationships; and functionalities. Of great interest are works that support understanding founded on fundamental principles using experimental, theoretical, or computational methods or combinations of those approaches. All the published papers must be of enduring value and relevant to the science of ceramics and glasses or composites based on those materials. Papers on fundamental ceramic and glass science are welcome including those in the following areas: Enabling materials for grand challenges[...] Materials design, selection, synthesis and processing methods[...] Characterization of compositions, structures, defects, and properties along with new methods [...] Mechanisms, Theory, Modeling, and Simulation[...] JACerS accepts submissions of full-length Articles reporting original research, in-depth Feature Articles, Reviews of the state-of-the-art with compelling analysis, and Rapid Communications which are short papers with sufficient novelty or impact to justify swift publication.