Synthesis of New Composite Adsorbents for Removing Heavy Metals and Dyes from Aqueous Solution

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
L. Mokif, Zahraa H. Obaid, Sarab A. Juda
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引用次数: 0

Abstract

In the current study, a novel composite (Fe 3 O 4 @MnO 2 @Al 2 O 3 ) was prepared to remove crystal violet dye and cadmium from aqueous solutions. The coprecipitation method was utilized to synthesize the composite. Batch studies were carried out using a contact period of 0.5–3 hours, an initial crystal violet and cadmium content of 50–200 mg/L, an agitation speed of 50–200 rpm, a pH of 4–12, and a composite dosage of 0.2–1.0 g per 50 mL of contaminated solution. The isotherm and kinetics models were formulated the experimental data. XRD, SEM-EDS, and FTIR analyses were utilized for composite characterization. The results revealed that the removal efficacy of crystal violet dye was 99.311% at 1 g of adsorbent, pH 12, 50 mg/L, 1 hour, and 200 rpm. The removal efficacy for cadmium (Cd) is 99.7296% at 1 g of sorbent mass at pH 6, 50 mg/L, 1 hour, and 200 rpm. The outcomes demonstrated that the Langmuir model could accurately depict the sorption of crystal violet dye onto the composite with R 2 (0.9882) and SSE (0.7084). On the basis of Freundlich, the capacity of the composite to reflect cadmium sorption was assessed by its highest R 2 (0.8947) and lowest SSE (8.5149). The pseudo-second-order model is a more realistic way to explain how cadmium and crystal violet dye sorb onto the composite. The results showed that the composite is effective in eliminating target pollutants, since cadmium has a maximum adsorption capacity of 48.5052 mg/g and crystal violet dye has a capacity of 40.9682 mg/g. Therefore, (Fe 3 O 4 @MnO 2 @Al 2 O 3 ) can be used as efficient sorbent for removing Cd and crystal violet dye from synthetic industrial wastewater.
合成用于去除水溶液中重金属和染料的新型复合吸附剂
本研究制备了一种新型复合材料(Fe 3 O 4 @MnO 2 @Al 2 O 3),用于去除水溶液中的水晶紫染料和镉。该复合材料的合成采用了共沉淀法。批量研究的接触时间为 0.5-3 小时,初始水晶紫和镉含量为 50-200 毫克/升,搅拌速度为 50-200 转/分钟,pH 值为 4-12,复合材料用量为每 50 毫升污染溶液 0.2-1.0 克。根据实验数据建立了等温线和动力学模型。利用 XRD、SEM-EDS 和傅立叶变换红外光谱分析了复合材料的特性。结果表明,在 1 克吸附剂、pH 值为 12、50 毫克/升、1 小时和 200 转/分的条件下,水晶紫染料的去除率为 99.311%。在 pH 值 6、50 毫克/升、1 小时和 200 转/分条件下,吸附剂质量为 1 克时,镉(Cd)的去除率为 99.7296%。结果表明,朗缪尔模型可以准确地描述水晶紫染料在复合材料上的吸附情况,其 R 2 为 0.9882,SSE 为 0.7084。在 Freundlich 模型的基础上,复合材料对镉的吸附能力由其最高的 R 2(0.8947)和最低的 SSE(8.5149)来评估。伪二阶模型能更真实地解释镉和结晶紫染料如何吸附到复合材料上。结果表明,由于镉的最大吸附容量为 48.5052 mg/g,水晶紫染料的吸附容量为 40.9682 mg/g,因此该复合材料能有效消除目标污染物。因此,(Fe 3 O 4 @MnO 2 @Al 2 O 3)可用作去除合成工业废水中镉和水晶紫染料的高效吸附剂。
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来源期刊
Accounts of Chemical Research
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.
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