颗粒活性炭柱法去除合成废水中的高浓度微塑料。

IF 4.2 4区 生物学 Q2 BIOTECHNOLOGY & APPLIED MICROBIOLOGY Bioengineered Pub Date : 2023-12-01 Epub Date: 2023-11-09 DOI:10.1080/21655979.2023.2276391
Nik Nor Amirah Mohd Napi, Naimah Ibrahim, Muhammad Adli Hanif, Masitah Hasan, Farrah Aini Dahalan, Achmad Syafiuddin, Raj Boopathy
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引用次数: 0

摘要

微塑料(MP)由于其在环境中的丰富性而成为一种新出现的令人担忧的污染物。污水处理厂(WWTP)可被认为是淡水中微塑料的主要来源之一,因为它在完全去除小MP方面效率低下。在本研究中,使用颗粒活性炭(GAC)作为吸附剂/过滤介质,评估了可作为污水处理厂三级处理的柱状MP去除,消除了粉末状活性炭(PAC)常见的堵塞问题。通过N2吸附-解吸等温线、场发射扫描电子显微镜和接触角测量对GAC进行表征,以确定其性质对MP去除效率的影响。议员(40-48 μm)去除率高达95.5% g/L MP,这是本工作中测试的最低浓度,但仍高于其他研究中常用的MP浓度。MP浓度进一步增加(最高1.0 g/L),但将GAC床长从7.5增加到17.5 cm可以导致更好的去除效率。MP颗粒主要通过与小的GAC颗粒/芯片纠缠或粘附在GAC颗粒之间的过滤过程被GAC固定。MPs通过截留在GAC多孔结构中或附着在GAC表面的吸附过程被不显著地去除。
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Column-based removal of high concentration microplastics in synthetic wastewater using granular activated carbon.

Microplastic (MP) is an emerging contaminant of concern due to its abundance in the environment. Wastewater treatment plant (WWTP) can be considered as one of the main sources of microplastics in freshwater due to its inefficiency in the complete removal of small MPs. In this study, a column-based MP removal which could serve as a tertiary treatment in WWTPs is evaluated using granular activated carbon (GAC) as adsorbent/filter media, eliminating clogging problems commonly caused by powder form activated carbon (PAC). The GAC is characterized via N2 adsorption-desorption isotherm, field emission scanning electron microscopy, and contact angle measurement to determine the influence of its properties on MP removal efficiency. MPs (40-48 μm) removal up to 95.5% was observed with 0.2 g/L MP, which is the lowest concentration tested in this work, but still higher than commonly used MP concentration in other studies. The performance is reduced with further increase in MP concentration (up to 1.0 g/L), but increasing the GAC bed length from 7.5 to 17.5 cm could lead to better removal efficiencies. MP particles are immobilized by the GAC predominantly by filtration process by being entangled with small GAC particles/chips or stuck between the GAC particles. MPs are insignificantly removed by adsorption process through entrapment in GAC porous structure or attachment onto the GAC surface.

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来源期刊
Bioengineered
Bioengineered BIOTECHNOLOGY & APPLIED MICROBIOLOGY-
CiteScore
8.20
自引率
28.60%
发文量
1114
审稿时长
17 weeks
期刊介绍: Bioengineered provides a platform for publishing high quality research on any aspect of genetic engineering which involves the generation of recombinant strains (both prokaryote and eukaryote) for beneficial applications in food, medicine, industry, environment and bio-defense.
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