Turning municipal food organic waste into activated carbon: A step towards circular economy

IF 5.4 3区工程技术 Q2 ENERGY & FUELS

Thermal Science and Engineering Progress Pub Date : 2024-12-01 DOI:10.1016/j.tsep.2024.103073

Nusrat Rezwana Binte Razzak , Hina Iqbal Syeda , Nicholas A. Milne , Ellen M. Moon

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Abstract

Finding a suitable way of managing the growing problem of municipal organic waste is a pressing issue worldwide. Unsorted municipal food waste (FW) was utilized for the first time as an activated carbon (AC) precursor. Varying pyrolysis conditions such as generation steps and carbonization temperature appeared to have a minor impact on AC characteristics compared to higher activation temperature, particularly 800 °C as indicated by a series of physicochemical characterizations. Selected FW-derived ACs were tested as an adsorbent under different experimental conditions to explore their efficacy in removing methylene blue (MB) from water. The adsorption of MB on FW-derived AC occurred in multilayers on heterogenous surfaces whereas the adsorption of MB on commercial AC occurred on a homogenous surface in a monolayer fashion which can be explained by chemisorption. The maximum MB adsorption by FW-derived AC was 47.72 mg/g under the conditions tested, although results indicated that the adsorption capacity had not been reached. Importantly, the kinetics of MB adsorption onto FW-derived AC was substantially faster than adsorption onto commercial AC. The findings of this study suggest that AC prepared from a diverse mixture of municipal FW is a promising, novel, and cost-effective adsorbent to eliminate MB.

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将城市食品有机垃圾转化为活性炭：迈向循环经济的一步

寻找一种合适的方法来管理日益严重的城市有机废物问题是世界范围内迫切需要解决的问题。首次利用未分类的城市食物垃圾（FW）作为活性炭（AC）前驱体。与较高的活化温度相比，不同的热解条件（如生成步骤和碳化温度）对AC特性的影响较小，特别是在800°C的一系列物理化学表征中。在不同的实验条件下，对选定的fw衍生的ac作为吸附剂进行了测试，以探讨其对水中亚甲基蓝（MB）的去除效果。甲基溴在fw衍生AC上的吸附发生在多相表面上，而甲基溴在商用AC上的吸附发生在均匀表面上的单层方式，这可以用化学吸附来解释。在实验条件下，fw衍生AC对MB的最大吸附量为47.72 mg/g，但没有达到吸附量。重要的是，在FW衍生的AC上吸附MB的动力学要比在商用AC上吸附快得多。本研究的结果表明，由不同的市政FW混合物制备的AC是一种有前途的、新颖的、经济的吸附MB的吸附剂。

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

Thermal Science and Engineering Progress Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

7.20

自引率

10.40%

发文量

327

审稿时长

41 days

期刊介绍： Thermal Science and Engineering Progress (TSEP) publishes original, high-quality research articles that span activities ranging from fundamental scientific research and discussion of the more controversial thermodynamic theories, to developments in thermal engineering that are in many instances examples of the way scientists and engineers are addressing the challenges facing a growing population – smart cities and global warming – maximising thermodynamic efficiencies and minimising all heat losses. It is intended that these will be of current relevance and interest to industry, academia and other practitioners. It is evident that many specialised journals in thermal and, to some extent, in fluid disciplines tend to focus on topics that can be classified as fundamental in nature, or are ‘applied’ and near-market. Thermal Science and Engineering Progress will bridge the gap between these two areas, allowing authors to make an easy choice, should they or a journal editor feel that their papers are ‘out of scope’ when considering other journals. The range of topics covered by Thermal Science and Engineering Progress addresses the rapid rate of development being made in thermal transfer processes as they affect traditional fields, and important growth in the topical research areas of aerospace, thermal biological and medical systems, electronics and nano-technologies, renewable energy systems, food production (including agriculture), and the need to minimise man-made thermal impacts on climate change. Review articles on appropriate topics for TSEP are encouraged, although until TSEP is fully established, these will be limited in number. Before submitting such articles, please contact one of the Editors, or a member of the Editorial Advisory Board with an outline of your proposal and your expertise in the area of your review.