Petrochemical Wastewater Treatment by Eggshell Modified Biochar as Adsorbent: Atechno-Economic and Sustainable Approach

IF 2.8 4区 工程技术 Q2 CHEMISTRY, APPLIED Adsorption Science & Technology Pub Date : 2022-02-14 DOI:10.1155/2022/2323836
A. Kumi, Mona G. Ibrahim, M. Fujii, M. Nasr
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引用次数: 10

Abstract

Petrochemical industrial wastewater (PIW)contains toluene and xylene (TX), and various organic and inorganic pollutants, causing severe risks to human health if improperly released into the environmental matrices. For the long-term reliability of environmental conservation, this study illustrates the interlinkage between PIW treatment and the three pillars of sustainable development. Sewage sludge biochar was modified with eggshell, showing a relatively high fixed C content (increase in carbonization degree), and small O/C and N/C ratios. The prepared biochar was employed for TX adsorption in mono-component solutions, giving removal efficiencies of 79.1% (T) and 86.6% (X), at pH =10, adsorbent dosage =2 g/L, and Co =40 mg/L within 60 min. The main adsorption mechanism was physisorption, including precipitation/pore-filling, π-π dispersive interaction, and van der Waals force. The modified biochar also treated real PIW under five adsorption/regeneration cycles, providing essential steps toward large-scale applications. According to an economic feasibility estimation, the biochar application for treating 1 m3 of PIW would offer a payback period of 6.9 yr. The study outputs could be linked to the restoration of water-related ecosystems, biochar modification for industrial applications, and climate change mitigation, adopting the 2030 agenda and its sustainable development goals (SDGs).
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蛋壳改性生物炭吸附剂处理石油化工废水:技术经济和可持续发展的途径
石油化工废水中含有甲苯和二甲苯,以及多种有机和无机污染物,如果不适当地排放到环境基质中,会对人体健康造成严重威胁。为了环境保护的长期可靠性,本研究说明了PIW处理与可持续发展三大支柱之间的相互联系。用蛋壳对污泥生物炭进行改性,其固定碳含量较高(炭化程度增加),O/C和N/C比值较小。在pH =10、吸附剂投加量为2 g/L、Co =40 mg/L的条件下,60 min内生物炭对TX的去除率分别为79.1% (T)和86.6% (X)。吸附机理主要为物理吸附,包括沉淀/孔隙填充、π-π色散相互作用和范德华力。改性生物炭在5个吸附/再生循环下也能处理真实的PIW,为大规模应用提供了必要的步骤。根据经济可行性估算,应用生物炭处理1 m3 PIW的投资回收期为6.9年。研究成果可与恢复与水有关的生态系统、用于工业应用的生物炭改性以及减缓气候变化、通过《2030年议程》及其可持续发展目标(sdg)联系起来。
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来源期刊
Adsorption Science & Technology
Adsorption Science & Technology 工程技术-工程:化工
CiteScore
5.00
自引率
10.30%
发文量
181
审稿时长
4.5 months
期刊介绍: Adsorption Science & Technology is a peer-reviewed, open access journal devoted to studies of adsorption and desorption phenomena, which publishes original research papers and critical review articles, with occasional special issues relating to particular topics and symposia.
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