Activated Charcoal from Coffee Dregs Waste as an Alternative Biosorbent of Cu(II) and Ag(I)

IF 1 Q4 CHEMISTRY, MULTIDISCIPLINARY Indonesian Journal of Chemistry Pub Date : 2023-08-15 DOI:10.22146/ijc.83269

S. Y. Prabawati, Priyagung Dhemi Widiakongko, Mohammad Ahsani Taqwim

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Abstract

This study examines the use of coffee dregs waste as biosorbents of Cu(II) and Ag(I). Coffee dregs waste still contains a high level of carbon and cellulose for biosorbents production. The production process was started with charcoal activation using H3PO4. The batch method was applied by variations of contact time, the mass of the biosorbent, and the initial concentration of metal ions. The results showed that Cu(II) and Ag(I) were optimally adsorbed at pH 6 and 4, respectively. The amount of adsorbed metal ions increased with adsorption contact time. The adsorption process of both metal ions reaches stability within 60 min and the optimum biosorbent mass is 1 g. Isothermal adsorption studies show that Cu(II) adsorption tends to follow Langmuir isotherm with an adsorption energy of 31.42 kJ/mol and Ag(I) adsorption follows Freundlich isotherms with an adsorption energy of 27.74 kJ/mol. Based on the results, the interaction between metal ions and adsorbents is a chemical adsorption process and coffee dregs charcoal has the potential to adsorb Cu(II) and Ag(I) metal ions.

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咖啡渣活性炭作为Cu（II）和Ag（I）的替代生物吸附剂

本研究考察了咖啡渣废料作为Cu（II）和Ag（I）的生物吸附剂的用途。咖啡渣废料仍然含有高水平的碳和纤维素，用于生产生物吸附剂。生产过程以使用H3PO4的木炭活化开始。通过改变接触时间、生物吸附剂的质量和金属离子的初始浓度来应用分批法。结果表明，Cu（II）和Ag（I）分别在pH为6和4时被最佳吸附。吸附的金属离子的量随着吸附接触时间的增加而增加。两种金属离子的吸附过程在60min内达到稳定，最佳生物吸附剂质量为1g。等温吸附研究表明，Cu（II）吸附遵循Langmuir等温线，吸附能为31.42kJ/mol，Ag（I）吸附遵循Freundlich等温线，吸附能量为27.74kJ/mol，金属离子与吸附剂之间的相互作用是一个化学吸附过程，咖啡渣炭具有吸附Cu（II）和Ag（I）金属离子的潜力。

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来源期刊

Indonesian Journal of Chemistry CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

2.30

自引率

11.10%

发文量

106

审稿时长

15 weeks

期刊介绍： Indonesian Journal of Chemistry is a peer-reviewed, open access journal that publishes original research articles, review articles, as well as short communication in all areas of chemistry, including educational chemistry, applied chemistry, and chemical engineering.