Adsorption of bimetal from aqueous solution on plum seed activated carbon synthesized by pyrocarbonic acid microwave method

IF 2.8 4区 生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY Journal of chemical technology and biotechnology Pub Date : 2024-07-04 DOI:10.1002/jctb.7708
Sami D Salman, Israa M Rashid, Yussur D Abdulwahab
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Abstract

BACKGROUND

This article presents the simultaneous adsorption of bimetal Cu2+ and Zn2+ from an aqueous solution using activated carbon synthesized from a plum seed precursor by sulfuric acid and microwave activation: plum seeds chemically activated by 45% (w/w) sulfuric acid with 2:1 ratio for 4 h, then carbonized for 2 h at 700 °C and the product obtained activated in a microwave oven for 20 min at 700 W for final of activation. Plum seeds and activated carbon produced were characterized in terms of their physical and chemical composition using Brunauer–Emmett–Teller measurements, field emission scanning electron microscopy and Fourier transform infrared spectroscopy. The effects of absorption time, bimetal solution pH, bimetal concentration and dosage of activated carbon on the capacity of adsorption and removal efficiency were studied with Design-Expert software using response surface methodology with the I-optimal method for experimental data analysis.

RESULTS

The results showed that the statistical analysis of Cu2+ and Zn2+ removal efficiency followed the quadratic models generated by Design-Expert software with significant P value (P < 0.0001) and the optimum values of removal efficiencies were 99.9268% for Cu2+ and 99.34% for Zn2+ at an adsorption time of 4.98 h, pH of 7.94, bimetal concentration of 38.467 mg L−1 and adsorbent dose of 1485.294 mg (100 mL)−1. The equilibrium adsorption data were analyzed by Langmuir and Freundlich isotherm models and there was a significant agreement in the results with the Freundlich model with R2 = 0.9841 for Cu2+ and R2 = 0.9927 for Zn2+. Likewise, the data were found to fit with a pseudo-second-order model with R2 = 0.9989 for Cu2+ and R2 = 0.9948 for Zn2+ as compared to a pseudo-first-order model.

CONCLUSION

Activated carbon synthesized from plum seeds with chemical and microwave activation could be effectively used as an adsorbent for bimetal Cu2+ and Zn2+ in aqueous solution. © 2024 Society of Chemical Industry (SCI).

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热碳酸微波法合成的李子籽活性炭对水溶液中双金属的吸附作用
背景 本文介绍了利用硫酸和微波活化法从李子籽前体合成的活性炭同时吸附水溶液中的双金属 Cu2+ 和 Zn2+:李子籽经 45%(重量比)硫酸以 2:1 的比例化学活化 4 小时,然后在 700 °C 下碳化 2 小时,得到的产物在微波炉中以 700 W 的功率活化 20 分钟,以完成活化。使用布鲁瑙尔-艾美特-泰勒测量法、场发射扫描电子显微镜和傅立叶变换红外光谱法对梅子和活性炭的物理和化学成分进行了表征。利用 Design-Expert 软件,采用响应面方法研究了吸收时间、双金属溶液 pH 值、双金属浓度和活性炭用量对吸附能力和去除效率的影响,并采用 I-optimal 方法进行了实验数据分析。结果表明,在吸附时间为 4.98 h、pH 值为 7.94、双金属浓度为 38.467 mg L-1 和吸附剂剂量为 1485.294 mg(100 mL)-1 时,Cu2+ 和 Zn2+ 去除效率的统计分析遵循 Design-Expert 软件生成的二次方模型,P 值显著(P < 0.0001),去除效率的最佳值分别为 99.9268%(Cu2+)和 99.34%(Zn2+)。用 Langmuir 和 Freundlich 等温线模型分析了平衡吸附数据,结果与 Freundlich 模型非常吻合,Cu2+ 的 R2 = 0.9841,Zn2+ 的 R2 = 0.9927。同样,与伪一阶模型相比,数据也符合伪二阶模型,Cu2+ 的 R2 = 0.9989,Zn2+ 的 R2 = 0.9948。© 2024 化学工业学会(SCI)。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
7.00
自引率
5.90%
发文量
268
审稿时长
1.7 months
期刊介绍: Journal of Chemical Technology and Biotechnology(JCTB) is an international, inter-disciplinary peer-reviewed journal concerned with the application of scientific discoveries and advancements in chemical and biological technology that aim towards economically and environmentally sustainable industrial processes.
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Issue Information In Focus: Materials and the Environment Symposium (XXXI IMRC México) Issue Information Adsorption behavior of graphite‐like walnut shell biochar modified with ammonia for ciprofloxacin in aqueous solution Eco‐friendly approaches for synthesis of indolyl 1H‐pyrroles using rice‐husk‐derived carbonaceous sulfonation as the green catalyst
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