两种干燥方式对土壤中多环芳烃回收率及同分异构体比值的影响

吉林大学学报(理学版) ›› 2021, Vol. 59 ›› Issue (1): 175-182.

两种干燥方式对土壤中多环芳烃回收率及同分异构体比值的影响

何坤^1,2，谢忠雷^1,3，高传宇²，靳前³，王国平²

1. 吉林大学新能源与环境学院，长春130012； 2. 中国科学院湿地生态与环境重点实验室，东北地理与农业生态研究所，长春130102; 3.吉林大学植物科学学院，长春130062

收稿日期:2020-06-18 出版日期:2021-01-26 发布日期:2021-01-26
通讯作者: 王国平 E-mail:wangguoping@iga.ac.cn

Effects of Two Drying Methods on Recovery Rate and Isomer Ratio of Polycyclic Aromatic Hydrocarbons （PAHs） in Soil

HE Kun^1,2, XIE Zhonglei^1,3, GAO Chuanyu², JIN Qian³, WANG Guoping²

1. College of New Energy and Environment, Jilin University, Changchun 130012, China; 2. Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China; 3. College of Plant Science, Jinlin University, Changchun 130062, China)

Received:2020-06-18 Online:2021-01-26 Published:2021-01-26

摘要/Abstract

摘要： 通过实验室模拟向泥炭土和农田土添加不同量的外源多环芳烃单体标准物质, 经冷冻干燥和自然风干处理后, 用气相色谱-质谱法（GC-MS）对土壤中16种外源多环芳烃单体进行测定, 分析两种干燥方式对土壤外源多环芳烃回收率和同分异构体比值的影响, 以反映不同干燥方式下土壤中多环芳烃测定的准确度及自然土壤多环芳烃来源判定的差异. 实验结果表明：泥炭土随外源多环芳烃添加量的增加, 多环芳烃总量回收率呈先降低后增加的趋势, 在相同添加量下，风干处理的多环芳烃总量回收率（56.29%~80.15%）均高于冻干处理的回收率（52.82%~78.31%）, 泥炭土单体多环芳烃低环组分风干处理高于冻干处理的回收率, 高环组分冻干处理高于风干处理的回收率; 不同干燥方式处理下农田土中多环芳烃总量回收率差异显著（P<0.05）, 经冻干处理后的总量回收率为64.40%~73.81%, 经风干处理后的总量回收率为40.88%~57.01%, 其单体多环芳烃冻干处理均高于风干处理的回收率；两种土壤的有机质质量比和含水率不同可能是导致多环芳烃总量和单体回收率差异的主要因素；在两种干燥方式处理下, 泥炭土中不同多环芳烃同分异构体比值无显著差异, 农田土中多环芳烃同分异构体比值受干燥方式影响显著.

关键词: 土壤; , 干燥方式; , 多环芳烃; , 回收率; , 同分异构体比值

Abstract: Through laboratory simulation, different amounts of exogenous polycyclic aromatic hydrocarbons (PAHs) monomer standard substances were added to peat soil and farmland soil. After freeze-drying and natural air drying, 16 kinds of exogenous PAHs monomers in the soil were determined by gas chromatography-mass spectrometry (GC-MS), and the effects of two drying methods on the recovery rate of exogenous PAHs and the isomer ratio in soil were analyzed to reflect the accuracy of PAHs determination in the soil and the difference of source determination of PAHs in natural soil under different drying methods. The experimental results show that with the increase of the amount of exogenous PAHs in peat soil, the total recovery rate of PAHs decrease first and then increase. The total recovery rate (56.29%—80.15%) of PAHs after the air-drying treatment is higher than that of freeze-drying treatment (52.82%—78.31%) under the same addition amount, and recover rate of its monomer PAHs low-ring component after air-drying treatment is higher than that of freeze-drying treatment, recovery rate of high-ring component after freeze-drying treatment is higher than that of air-drying treatment. The recovery rate of total PAHs in farmland soil is significantly different (P<0.05) under different drying methods. The total recovery rate after freeze-drying treatment is 64.40%—73.81%, and the total recovery rate after air-drying treatment is 40.88%—57.01%, and the recovery rate of the monomer PAHs after freeze-drying treatment is higher than that of air-drying treatment. The difference of organic matter mass ratio and water content of the two soils may be the main factors that lead to the difference of total and monomer recovery rate of PAHs. There is no significant difference in the ratios of PAHs isomers in peat soil, while the ratios of the PAHs isomers in farmland soil are significantly affected by the drying method.

Key words: soil; , drying method; , polycyclic aromatic hydrocarbons; , recovery rate; , isomer ratio

中图分类号:

X132

何坤, 谢忠雷, 高传宇, 靳前, 王国平. 两种干燥方式对土壤中多环芳烃回收率及同分异构体比值的影响[J]. 吉林大学学报(理学版), 2021, 59(1): 175-182.

HE Kun, XIE Zhonglei, GAO Chuanyu, JIN Qian, WANG Guoping. Effects of Two Drying Methods on Recovery Rate and Isomer Ratio of Polycyclic Aromatic Hydrocarbons （PAHs） in Soil[J]. Journal of Jilin University Science Edition, 2021, 59(1): 175-182.

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