| 摘要: |
| 建立了一种泥沙水样中分离微塑料纤维和去除泥沙的方法。选取聚酰胺6（Polyamide 6，PA）、丙烯腈-丁二烯-苯乙烯共聚物（Acrylonitrile butadiene styrene copolymers，ABS）、聚丙烯（Polypropylene，PP）颗粒，制备长度（1±0.25）mm，宽度(200±30)μm的微塑料纤维；分别混合不同质量（0，0.01，0.05，0.25，1.25，6.25 g）经30%过氧化氢消解和饱和氯化钠（1.2 g/mL）、碘化钠溶液（1.8 g/mL）浮选后的自然泥沙；以探究在不同泥沙质量下，静置阶段投加氯化钠颗粒对玻璃漏斗中微塑料纤维分离效率以及泥沙去除率的影响，并与不投加氯化钠和容量瓶浮选法作比较。结果表明，在静置阶段添加氯化钠颗粒效果较优，对3种微塑料纤维的平均分离效率和泥沙的平均去除率分别为87.78%和98.33%。实验结论可为微塑料分离提取方法的优化提供参考。 |
| 关键词: 微塑料纤维 玻璃漏斗 氯化钠颗粒 泥沙 分离 |
| DOI： |
| 分类号:X832 |
| 文献标识码:A |
| 基金项目:国家自然科学基金资助项目（21607017）；江苏省环境监测科研基金资助项目（1702）；江苏省“六大人才高峰”基金资助项目（JNHB-118）；江苏省“333工程”科研基金资助项目（BRA2018162；BRA2018214）；江苏省常州环境监测中心培新项目（201817-PX） |
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| Study on the Separation of Microplastic Fibers and Sediment Removal from Silty Water Samples |
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GU Ming, XUE Yin-gang, CHENG Jie-hong, XU Xia1,2,3,4
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1. College of Chemistry and Environmental Engineering, Jiangsu University of Technology, Changzhou，Jiangsu 213001, China;2. Key Laboratory of Environmental Protection of Water Environment Biological Monitoring of Jiangsu Province, Jiangsu Changzhou Environmental Monitoring Center, Changzhou, Jiangsu 213001,China;3. School of Environmental and Safety Engineering, Changzhou University, Changzhou, Jiangsu 213164, China;4. Nantong Environmental Monitoring Center of Jiangsu Province, Nantong, Jiangsu 226006, China
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| Abstract: |
| A method for separating microplastic fibers and removing sediment from silty water samples was developed. The particles of polyamide 6 (PA), acrylonitrile butadiene styrene copolymers (ABS) and polypropylene (PP) were chosen to prepare the microplastic fibers with a length of (1±0.25)mm and a width of (200±30)μm. The prepared microplastic fibers were mixed with different mass (0, 0.01, 0.05, 0.25, 1.25, 6.25 g) of natural sediments, which were digested by 30% hydrogen peroxide and after saturated NaCl (1.2 g/mL), NaI (1.8 g/mL) solution floatation, in order to explore the effect of adding sodium chloride particles under different sediment quality on the separation efficiency and sediment removal rate in glass funnel, it was also compared with the flotation method without adding sodium chloride and volumetric flask floatation method. The results showed that the optimal effect was achieved by adding sodium chloride particles in the static phase, and the average separation efficiency and sediment removal rate of the glass funnel on PA, ABS and PP microplastic fibers were 87.78% and 98.33%, respectively. The experimental conclusion can provide reference for the optimization of microplastics separation and extraction methods. |
| Key words: Microplastic fibers Glass funnel Sodium chloride particles Sediment Separation |
