Academic Journal
基于密度分离-氧化消解法 前处理的土壤微塑料检测.
| العنوان: | 基于密度分离-氧化消解法 前处理的土壤微塑料检测. (Chinese) |
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| Alternate Title: | Detection of Microplastics in Soil Based on Density Separation-Oxidation Digestion Pretreatment. (English) |
| المؤلفون: | 吴思怡, 谢福武, 王少露, 何书海, 田毓婷, 姜晓旭 |
| المصدر: | Chinese Journal of Inorganic Analytical Chemistry / Zhongguo Wuji Fenxi Huaxue; Aug2024, Vol. 14 Issue 8, p1091-1098, 8p |
| مصطلحات موضوعية: | SOIL surveys, SODIUM iodide, POLLUTION prevention, SOIL pollution, MICROPLASTICS, CENTRIFUGATION |
| Abstract (English): | At present,the research on microplastics in soil is still in its infancy. In order to carry out more scientific surveys on the risk of soil microplastic pollution and pollution prevention and control, it is necessary to establish a unified detection method. Several key factors affecting the detection of soil microplastics during the experiment of density separation-oxidation digestion method were optimized, including drying temperature, sampling amount, flotation agent, stirring time, sedimentation and centrifugation conditions, 3nd digestion time・ The results showed that when the drying temperature was selected at 55 °C, it affected the morphological structure and chemical composition of microplastics. The soil sampling amount of 30--50 g was more suitable, which could bet ter reflect the dist ribution of microplastics in soil・ Sodium iodide had a good flotation effect on most microplastic components・ By manual or mechanical stirring for 4--6 min, the microplastics ached to the soil can be effectively separated・ After sedimentation for more than 24 h or centrifugation at 6 000一8 000 r/min for 10 min,the soil impurities and microplastics were fully separated・ Most organic impurities were removed after 24 h of digestion・ The whole process is simple,operable,and has good separation effect,and it is not easy to cause secondary crushing of microplastics, which can provide a reliable basis for formulating future monitoring technical methods and specifications for soil microplastics and assessing the abundance and distribution of microplastics in the soil. [ABSTRACT FROM AUTHOR] |
| Abstract (Chinese): | 目前，土壤中微塑料的研究尚处于起步阶段。为了更科学地开展土壤微塑料污染风险调査 和污染防治，首先需要建立统一的检测方法。通过优化密度分离氧化消解法实验过程中影响土壤微 塑料检测的多个关键因素，包括干燥温度、取样量、浮选剂、搅拌时长、沉降和离心条件及消解时间。 结果表明:干燥处理的温度选择在55 °C时不会对微塑料形态结构及化学成分造成影响；土壤取样量 在30〜50 g更为适宜，能更好地反映土壤中微塑料分布情况；对于浮选剂的选择，碘化钠对大部分微塑 料成分具有良好的浮选效果；通过手动或机械搅拌4〜6 min,可有效地将附着在土壤中的微塑料分离出 来;沉降放置24 h以上或6 000-8 000 r/min离心10 min可使土壤杂质与微塑料达到充分分离的效 果；消解放置24 h可去除大多数有机杂质。全过程具有简单、可操作性强、分离效果好的特点，且不易 对微塑料造成二次破碎，可为今后制定土壤微塑料监测技术方法及规范、评估土壤中微塑料丰度分布提 供可靠的依据。. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: | Complementary Index |
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