Odor Diffusion Control by Nanoparticles Filled Long-Chain Branched Polylactic Acid Film: Mechanism and Application Potential Research

IF 2.6 4区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

International Journal of Environmental Research Pub Date : 2024-06-04 DOI:10.1007/s41742-024-00622-5

Meiyun Feng, Zhiqiang Xu, Kuangfei Lin, Meng Zhang

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Abstract

The biodegradable film that exhibited excellent physical barrier properties and the function to degrade smelly organic pollutants (SOP) had been successfully synthesized in this study. The organic intercalation-modified bentonite that loaded with CaO₂ (OBT@CaO₂) was synthesized initially, which would serve as a layered nano-filler to modify the long-chain (polybutylene adipate-co-terephthalate) branched polylactic acid (PLA/PBAT), to produce the SOP diffusion control film (OBT@CaO₂-PLA/PBAT, OCPP). OBT@CaO₂ could improve the initial tensile strength (46.5 ± 6.53 MPa) and elongation at break (412.8 ± 9.25%) of OCPP film, and the O₂ transmission rate was as low as 44.89 cc/m²∙day. Although the saturated adsorption capacity of SOP on OBT@CaO₂ decreased with olfactory thresholds, the penetration time correspondingly increased due to reduced degradation difficulty. OCPP film showed excellent SOP control performance in laboratory and large-scale tests at actual pesticide industrial contaminated sites (PICSs). The diffusion fluxes of SOP exhibited a reduction of at least 84.0% within 14 days, and the effectiveness of SOP control increased over time. This improvement is attributed to the gradual release of H₂O₂ by OBT@CaO₂, enabling the effective degradation of SOP that adsorbed on it, thereby continuously providing adsorption sites. The research can provide a low-cost and green approach for long-term diffusion control of SOP at contaminated sites that are not limited to PICSs.

Graphical Abstract

Abstract Image

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纳米颗粒填充长链支链聚乳酸薄膜的气味扩散控制：机理与应用潜力研究

本研究成功合成了具有优异物理屏障性能和降解恶臭有机污染物（SOP）功能的可生物降解薄膜。首先合成了负载 CaO2 的有机插层改性膨润土（OBT@CaO2），作为层状纳米填料改性长链（聚己二酸丁二醇酯-对苯二甲酸乙二醇酯）支链聚乳酸（PLA/PBAT），制备出 SOP 扩散控制膜（OBT@CaO2-PLA/PBAT，OCPP）。OBT@CaO2 可提高 OCPP 薄膜的初始拉伸强度（46.5 ± 6.53 MPa）和断裂伸长率（412.8 ± 9.25%），氧气透过率低至 44.89 cc/m2∙day。虽然 SOP 在 OBT@CaO2 上的饱和吸附容量随嗅觉阈值的升高而降低，但由于降解难度降低，渗透时间相应延长。在实验室和实际农药工业污染场地（PICSs）的大规模试验中，OCPP 薄膜表现出了优异的 SOP 控制性能。在 14 天内，SOP 的扩散通量至少减少了 84.0%，而且随着时间的推移，SOP 的控制效果也在提高。这种改善归功于 OBT@CaO2 逐渐释放出 H2O2，使吸附在其上的 SOP 得到有效降解，从而不断提供吸附位点。该研究可为污染场地的 SOP 长期扩散控制提供一种低成本的绿色方法，而不仅限于 PICS。

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来源期刊

International Journal of Environmental Research 环境科学-环境科学

CiteScore

5.40

自引率

0.00%

发文量

104

审稿时长

1.7 months

期刊介绍： International Journal of Environmental Research is a multidisciplinary journal concerned with all aspects of environment. In pursuit of these, environmentalist disciplines are invited to contribute their knowledge and experience. International Journal of Environmental Research publishes original research papers, research notes and reviews across the broad field of environment. These include but are not limited to environmental science, environmental engineering, environmental management and planning and environmental design, urban and regional landscape design and natural disaster management. Thus high quality research papers or reviews dealing with any aspect of environment are welcomed. Papers may be theoretical, interpretative or experimental.