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Spatial variation and influence factor analysis of soil heavy metal As based on geoDetector
Stochastic Environmental Research and Risk Assessment ( IF 4.2 ) Pub Date : 2021-01-27 , DOI: 10.1007/s00477-021-01976-4
Xvlu Wang , Yingjun Sun , Liping Zhang , Yuang Mei

Heavy metals in soil are closely related to our production and life. As heavy metal has relatively high toxicity, it is necessary to clarify its existence. This study took Liaocheng City as the study area. Sampling was carried out by the 10 km × 10 km grid center method and the concentration of heavy metal arsenic (As) at the sampling points was extracted. Based on the national secondary standard and Shandong background value, the single factor index was used to evaluate the status of heavy metal As in the soil of Liaocheng City, and eight factors related to heavy metal As were selected. This study used geographic detectors to identify spatial relationships among the factors. By the statistical description of the heavy metal As in the soil of Liaocheng City and the evaluation of the single factor index, we found that there was light pollution in most areas of Liaocheng City. By analyzing the results of the GeoDetector, it was found that the soil organic matter, soil subcategory, distance to river, and GDP were the dominant factors that affected the concentration and spatial variation of heavy metal As. The interaction results showed that the interaction between GDP and other influencing factors significantly increased the explanatory power of As.



中文翻译:

基于geoDetector的土壤重金属As空间变异及影响因素分析

土壤中的重金属与我们的生产和生活息息相关。由于重金属具有较高的毒性,因此有必要澄清其存在。本研究以聊城市为研究区域。通过10 km×10 km网格中心法进行采样,并提取采样点处的重金属砷(As)浓度。根据国家二级标准和山东省本底值,采用单因素指标评价聊城市土壤中重金属As的状况,选择与重金属As相关的8个因子。这项研究使用地理探测器确定因素之间的空间关系。通过对聊城市土壤重金属As的统计描述和单因素指标的评价,我们发现聊城市大部分地区都存在光污染。通过对GeoDetector结果的分析,发现土壤有机质,土壤亚类,到河流的距离和GDP是影响重金属As浓度和空间变化的主要因素。相互作用结果表明,GDP与其他影响因素之间的相互作用显着提高了砷的解释能力。

更新日期:2021-01-28
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