废咖啡豆活性炭对除草剂迪古隆和利谷隆吸附效率的分析与模拟

IF 2.8 4区 工程技术 Q2 ENGINEERING, CHEMICAL Processes Pub Date : 2024-09-11 DOI:10.3390/pr12091952
Luiz Eduardo Zani de Moraes, Felipe Augusto Olivo Marcoti, Marco Antônio Naves Lucio, Bianca Caroline da Silva Rocha, Lucas Bonfim Rocha, Adriano Lopes Romero, Evandro Bona, Ana Paula Peron, Osvaldo Valarini Junior
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引用次数: 0

摘要

苯脲除草剂(如 diuron 和 linuron)通常用于农业除草。不加控制地使用这些除草剂会造成环境问题。在本研究中,使用咖啡渣活性炭、氯化锌活性炭(AC-ZnCl2,纯度 100%)、硝酸活性炭(AC-HNO3,纯度 65%)和商用活性炭(AC-C)对这些除草剂的吸附性进行了评估。废咖啡渣通过煅烧过程转化为活性炭。ZnCl2 活性吸附剂对利谷隆 40 mg∙L-1 和利谷隆 31 mg∙L-1 的去除率最高,分别为 100%和 45%。最佳 pH 值范围为 4 至 6。吸附动力学研究表明,伪一阶和二阶模型符合实验数据,在测试浓度下,吸附速率在 60 分钟内迅速增加。吸附等温线表明,Langmuir 模型最适合利谷隆,而 Freundlich 模型更适合利谷隆。使用活性炭(AC)进行吸附前后,利谷隆和利谷隆溶液的毒性分析证实了使用活性炭吸附过程的效率。
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Analysis and Simulation of Adsorption Efficiency of Herbicides Diuron and Linuron on Activated Carbon from Spent Coffee Beans
Phenyl urea herbicides such as diuron and linuron are commonly used in agriculture to eliminate weeds. Their uncontrolled use can cause environmental problems. In this study, the adsorption of these herbicides was evaluated using activated carbon from coffee grounds, activated with zinc chloride (AC-ZnCl2, 100% purity), nitric acid (AC-HNO3, 65% purity), and commercially activated (AC-C) carbon for comparison purposes. The spent coffee grounds were transformed into activated carbon through the calcination process. The highest removal efficiency for diuron 40 mg∙L−1 and linuron 31 mg∙L−1 was obtained using the ZnCl2-activated adsorbent, being 100% and 45%, respectively. The best pH range was between 4 and 6. Adsorption kinetic studies showed that pseudo-first and second-order models fit the experimental data, with the adsorption rate increasing rapidly within 60 min for the concentrations tested. Adsorption isotherms indicated that the Langmuir model provided the best fit for diuron, while the Freundlich model was more appropriate for linuron. The efficiency of the adsorption process using activated carbon (AC) was confirmed by the toxicity analysis of diuron and linuron solutions before and after adsorption with AC.
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来源期刊
Processes
Processes Chemical Engineering-Bioengineering
CiteScore
5.10
自引率
11.40%
发文量
2239
审稿时长
14.11 days
期刊介绍: Processes (ISSN 2227-9717) provides an advanced forum for process related research in chemistry, biology and allied engineering fields. The journal publishes regular research papers, communications, letters, short notes and reviews. Our aim is to encourage researchers to publish their experimental, theoretical and computational results in as much detail as necessary. There is no restriction on paper length or number of figures and tables.
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