The occurrence of selected organic pollutants in the soils of the Songnen Plain, China

IF 2.8 3区 农林科学 Q3 ENVIRONMENTAL SCIENCES Journal of Soils and Sediments Pub Date : 2024-07-29 DOI:10.1007/s11368-024-03876-w
Yanan Chen, Yichen Zhang, Jiquan Zhang, Chenyang Wu, Lili, Qiuling Lang, Huanan Liu
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Abstract

Purpose

To protect and improve the soil environment of the Songnen Plain, detailed identification of organic pollutant contamination features in the soil and the degree of contamination is required. The primary goals of this research are to measure the levels of organic pollutants detected in the soil of the Songnen Plain, to correlate the levels of organic pollutants with different land use practices, and to assess the environmental quality of the soil using various pollution indicators.

Material and methods

Contaminated soil was collected at three types of areas: residential (n = 26), agricultural (n = 22), and industrial (n = 12) in the Songnen Plain of Jilin Province, at 0–20 cm and 20–40 cm depths. The concentrations of dichlorodiphenyltrichloroethane, benzene hexachloride, toluene, ethylbenzene, xylene, benzo (a) pyrene (BaP), trichloromethane, tetrachloromethane, hexachlorobenzene, and atrazine in the soil samples were determined using gas chromatography (GC), gas chromatograph-mass spectrometer-mass spectrometer (GC-MS-MS), and high-performance liquid chromatography (HPLC).

Results and discussion

Soil BaP had the highest concentration with a mean value of 20.59 ng/kg, followed by atrazine, hexachlorobenzene, benzene hexachloride, dichlorodiphenyltrichloroethane (DDT), trichloromethane, toluene, ethylbenzene, xylene, and tetrachloromethane with mean concentrations of 0.46, 0.44, 0.34, 0.28, 0.21, 0.14, 0.06, 0.03, and 0.02 ng/kg, respectively. Soil organic pollutants at all sampling sites did not exceed the secondary environmental quality standard values. The most serious soil contamination was found in landfill sites, followed by urban areas, industrial areas and farmland areas.

Conclusions

Soil contamination is more severe in locations where human activity is more prevalent. The subsoil can better reflect the characteristics of soil pollution in the area compared to the upper layer of soil. Although contamination is low in the research region, the presence of these pollutants must be taken seriously in order to maintain the quality and safety of agricultural products and human health.

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中国松嫩平原土壤中部分有机污染物的出现
目的为了保护和改善松嫩平原的土壤环境,需要详细查明土壤中有机污染物的污染特征和污染程度。本研究的主要目标是测定松嫩平原土壤中有机污染物的含量,将有机污染物的含量与不同的土地利用方式相关联,并利用各种污染指标评估土壤的环境质量。采用气相色谱法(GC)、气相色谱-质谱-质谱联用仪(GC-MS-MS)和高效液相色谱法(HPLC)测定了土壤样品中二氯二苯三氯乙烷、六氯化苯、甲苯、乙苯、二甲苯、苯并(a)芘(BaP)、三氯甲烷、四氯甲烷、六氯苯和阿特拉津的浓度。结果与讨论土壤中的苯并[a]芘浓度最高,平均值为 20.59 纳克/千克,其次是阿特拉津、六氯苯、六氯化苯、二氯二苯基三氯乙烷(DDT)、三氯甲烷、甲苯、乙苯、二甲苯和四氯甲烷,平均浓度分别为 0.46、0.44、0.34、0.28、0.21、0.14、0.06、0.03 和 0.02 纳克/千克。所有采样点的土壤有机污染物均未超过二级环境质量标准值。垃圾填埋场的土壤污染最为严重,其次是城市地区、工业区和农田地区。与上层土壤相比,底层土壤更能反映该地区的土壤污染特征。虽然研究区域的污染程度较低,但必须重视这些污染物的存在,以维护农产品的质量安全和人类健康。
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来源期刊
Journal of Soils and Sediments
Journal of Soils and Sediments 环境科学-土壤科学
CiteScore
7.00
自引率
5.60%
发文量
256
审稿时长
3.5 months
期刊介绍: The Journal of Soils and Sediments (JSS) is devoted to soils and sediments; it deals with contaminated, intact and disturbed soils and sediments. JSS explores both the common aspects and the differences between these two environmental compartments. Inter-linkages at the catchment scale and with the Earth’s system (inter-compartment) are an important topic in JSS. The range of research coverage includes the effects of disturbances and contamination; research, strategies and technologies for prediction, prevention, and protection; identification and characterization; treatment, remediation and reuse; risk assessment and management; creation and implementation of quality standards; international regulation and legislation.
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