用于医院废水连续处理的新型漆酶基中空填料床反应器

IF 5.8 3区 环境科学与生态学 0 ENVIRONMENTAL SCIENCES
Komla Alokpa, Linson Lonappan, Hubert Cabana
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引用次数: 0

摘要

本研究报道了在填充床反应器(PBR)中漆酶介导的对真实医院废水(HWW)中微量有机化合物(TrOCs)的去除。反应器柱由氨基功能化介孔二氧化硅微球的催化床组成,该微球附着在中空聚乙烯填料上,其上固定有毛毡漆酶。这种床层材料具有显著限制压降的优点,而压降是pbr在连续模式下运行的主要缺点之一。PBR加料HWW,之前通过0.45µm PTFE过滤器过滤。HWW在1µg L−1的浓度下加入对乙酰氨基酚、布洛芬、萘普生、酮洛芬、甲氧胺酸、吲哚美辛和卡马西平。以对乙酰氨基酚为模型酚类化合物,建立了底物转化(一级动力学)和生物催化剂失活(一级动力学)相结合的动力学模型。经验证,该模型在非受控条件(pH、无缓冲介质、环境温度)下对实际HWW长时间运行具有较好的拟合性和鲁棒性。接触6 h后,PBR中95%以上的对乙酰氨基酚和甲氧胺酸被去除。此外,毒性试验表明,漆酶处理可降低对大水蚤的毒性。与未处理的HWW不同,处理后的HWW对大水蚤的移动性没有显著影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Innovative laccase-based hollow packed-bed reactor for continuous treatment of hospital wastewater

This study reports on laccase-mediated removal of trace organic compounds (TrOCs) from real hospital wastewater (HWW) in a packed-bed reactor (PBR). The reactor column consisted of a catalytic bed of amino-functionalized mesoporous silica microspheres attached to a hollow polyethylene packing on which a Trametes hirsuta laccase was immobilized. This bed material had the advantage of significantly limiting pressure drop, which is one of the major drawbacks of PBRs operating in continuous mode. The PBR was fed with HWW, previously filtered through a 0.45-µm PTFE filter. The HWW was used either unspiked or spiked at 1 µg L−1 with acetaminophen, ibuprofen, naproxen, ketoprofen, mefenamic acid, indomethacin, and carbamazepine. A kinetic model combining the substrate conversion (1st-order kinetic) and the biocatalyst inactivation (1st-order kinetic) was developed and implemented, using acetaminophen as a model phenolic compound. After validation, the model showed good fit with experimental data and robustness regarding extended time operation with real HWW under uncontrolled conditions (pH, unbuffered media, ambient temperature). After 6 h of contact time, more than 95% of acetaminophen and mefenamic acid were removed in the PBR. In addition, toxicity tests showed that the laccase-based treatment resulted in a reduction in toxicity to Daphnia magna. The treated HWW did not significantly affect the mobility of Daphnia magna, unlike untreated HWW.

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来源期刊
CiteScore
8.70
自引率
17.20%
发文量
6549
审稿时长
3.8 months
期刊介绍: Environmental Science and Pollution Research (ESPR) serves the international community in all areas of Environmental Science and related subjects with emphasis on chemical compounds. This includes: - Terrestrial Biology and Ecology - Aquatic Biology and Ecology - Atmospheric Chemistry - Environmental Microbiology/Biobased Energy Sources - Phytoremediation and Ecosystem Restoration - Environmental Analyses and Monitoring - Assessment of Risks and Interactions of Pollutants in the Environment - Conservation Biology and Sustainable Agriculture - Impact of Chemicals/Pollutants on Human and Animal Health It reports from a broad interdisciplinary outlook.
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