Effectiveness of Activated Carbon from Jackfruit Skin for The Heavy Metal Lead (Pb) Adsorption Using The Langmuir and Freundlich Equations

Nadya Ramadhani Arke, Dewa Ayu Made Dearwita Sari, Retno Dewati
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Abstract

ABSTRACT. Activated carbon is a commonly used medium for adsorption to combat environmental pollution in both water and air. It is produced from plant or plantation waste containing carbon. Jackfruit skin, often considered as plantation waste, contains lignocellulosic compounds and has the potential to be used as active carbon. Activated carbon from jackfruit skin has a good absorption capacity and can absorb heavy metal waste such as lead (Pb). A recent study aimed to evaluate the absorption effectiveness of active carbon from jackfruit skin. The process involved making activated carbon using the pyrolysis method, and then analyzing its lead absorption capacity in lead nitrate solution by varying the weight of the activated carbon (10g, 15g, 20g, 25g, 30g) and the adsorption time in minutes (40, 60, 80, 100, 120). The levels of absorbed lead on activated carbon were tested using Atomic Absorption Spectrophotometry (AAS) at a wavelength of 283.3 nm. The research findings indicate that the effectiveness of activated carbon absorption reaches 99%, and the appropriate equation model for the adsorption process is the Freundlich isotherm, indicating a multilayer adsorption process.

Keywords:

Adsorption Isotherm, Activated Carbon Jackfruit Skin, Lead (Pb)

利用 Langmuir 和 Freundlich 方程计算菠萝皮活性炭对重金属铅 (Pb) 的吸附效果
摘要活性炭是一种常用的吸附介质,用于治理水和空气中的环境污染。它由含碳的植物或种植园废料制成。菠萝蜜果皮通常被视为种植园废弃物,含有木质纤维素化合物,具有用作活性炭的潜力。从柚子皮中提取的活性炭具有良好的吸收能力,可以吸收重金属废物,如铅(Pb)。最近的一项研究旨在评估菠萝皮活性炭的吸收效果。研究过程包括使用热解法制作活性炭,然后通过改变活性炭的重量(10 克、15 克、20 克、25 克、30 克)和以分钟为单位的吸附时间(40 分钟、60 分钟、80 分钟、100 分钟、120 分钟),分析其在硝酸铅溶液中的铅吸收能力。使用波长为 283.3 纳米的原子吸收分光光度法(AAS)检测了活性炭上吸收的铅含量。研究结果表明,活性炭的吸附效果达到 99%,吸附过程的合适方程模型是 Freundlich 等温线,表明这是一个多层吸附过程。
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