评估与地毯草混合的土壤对 1,3-二硝基苯污染土壤的多酚还原降解作用

IF 3.8 4区 环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Water, Air, & Soil Pollution Pub Date : 2024-07-06 DOI:10.1007/s11270-024-07284-1
Chi-Wei Wang, Chih-Ting Yang, Chenju Liang
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引用次数: 0

摘要

摘要 环境污染物 1,3-二硝基苯(1,3-DNB)含有两个硝基(-NO2),其氮原子氧化态为 +III,容易接受电子并随后发生还原降解。本研究将地毯草作为 1,3-DNB 还原降解过程中一种潜在的多酚来源进行了调查。地毯草的特性分析表明,水溶液中的地毯草能迅速释放出多酚,并提高还原能力。研究还考察了溶液中草的用量和水相 pH 值的影响。结果发现,溶液中草的剂量越高(例如 50 克/升),水相中的 1,3-DNB 在 7 天反应后就会被完全去除,而与 pH 值无关。对 1,3-DNB 降解及其反应中间产物 3-硝基苯胺(3-NA)和 1,3-苯二胺的动力学分析表明,在不同剂量的地毯草中观察到的总体降解率(2.51-3.17 × 10-2 h-1)相似,但发现剂量确实会影响 3-NA 的形成和降解。根据研究结果,提出了一种潜在的 1,3-DNB 污染土壤混合处理方法,包括将地毯草与土壤混合。模拟实地修复应用的土壤泥浆实验表明,在反应条件下,适当的溶液量和足够高的草剂量可以增强 1,3-DNB 污染土壤的降解能力。这项研究为通过在受 1,3-DNB 污染的土壤中添加地毯草来利用地毯草进行潜在的土壤修复提供了有价值的见解。
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Evaluation of Soil Mixing with Carpet Grasses for Polyphenol Reductive Degradation of 1,3-dinitrobenzene Contaminated Soils

Abstract

The environmental contaminant 1,3-Dinitrobenzene (1,3-DNB), which contains two nitro groups (-NO2), has a +III nitrogen atom oxidation state, and is susceptible to electron acceptance, and subsequent reductive degradation. In this study, carpet grass was investigated as a potential source of polyphenols for the reductive degradation of 1,3-DNB. A characterization of carpet grass revealed a rapid release of polyphenols from the grass in aqueous solution, and an increase in reduction capacity. The effects of the amount of grass in solution, and effects of the pH of the aqueous phase were examined. It was found that higher grass doses (e.g., 50 g L-1) in solution resulted in complete removal of 1,3-DNB in the aqueous phase after 7 d reaction, regardless of the pH level. Kinetic analysis of 1,3-DNB degradation and its reaction intermediates, 3-nitroaniline (3-NA) and 1,3-phenylenediamine, indicated that the overall observed degradation rates (2.51-3.17 × 10-2 h-1) were similar across different doses of carpet grass, but found that the dose did impact the formation and degradation of 3-NA. Based on the results, a potential soil mixing treatment for 1,3-DNB contaminated soils, consisting of the blending of carpet grasses with soils was proposed. Soil slurry experiments simulating field remediation application suggested that enhanced degradation of 1,3-DNB contaminated soils can be achieved under reaction conditions with an appropriate solution volume and sufficiently high grass doses. This research offers valuable insights into the utilization of carpet grass for potential soil remediation through its incorporation into soils contaminated with 1,3-DNB.

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来源期刊
Water, Air, & Soil Pollution
Water, Air, & Soil Pollution 环境科学-环境科学
CiteScore
4.50
自引率
6.90%
发文量
448
审稿时长
2.6 months
期刊介绍: Water, Air, & Soil Pollution is an international, interdisciplinary journal on all aspects of pollution and solutions to pollution in the biosphere. This includes chemical, physical and biological processes affecting flora, fauna, water, air and soil in relation to environmental pollution. Because of its scope, the subject areas are diverse and include all aspects of pollution sources, transport, deposition, accumulation, acid precipitation, atmospheric pollution, metals, aquatic pollution including marine pollution and ground water, waste water, pesticides, soil pollution, sewage, sediment pollution, forestry pollution, effects of pollutants on humans, vegetation, fish, aquatic species, micro-organisms, and animals, environmental and molecular toxicology applied to pollution research, biosensors, global and climate change, ecological implications of pollution and pollution models. Water, Air, & Soil Pollution also publishes manuscripts on novel methods used in the study of environmental pollutants, environmental toxicology, environmental biology, novel environmental engineering related to pollution, biodiversity as influenced by pollution, novel environmental biotechnology as applied to pollution (e.g. bioremediation), environmental modelling and biorestoration of polluted environments. Articles should not be submitted that are of local interest only and do not advance international knowledge in environmental pollution and solutions to pollution. Articles that simply replicate known knowledge or techniques while researching a local pollution problem will normally be rejected without review. Submitted articles must have up-to-date references, employ the correct experimental replication and statistical analysis, where needed and contain a significant contribution to new knowledge. The publishing and editorial team sincerely appreciate your cooperation. Water, Air, & Soil Pollution publishes research papers; review articles; mini-reviews; and book reviews.
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