A multivariate statistical analysis of the distribution and influencing factors of heavy metal elements in the cultivated land of the Sanjiang Plain
SONG Yun-Hong1,2,3(), YANG Feng-Chao1(), LIU Kai1,2,3, DAI Hui-Min1,2,3, XU Jiang1,2,3, YANG Ze1,2,3
1. Shenyang Center of China Geological Survey, Shenyang 110034, China 2. Key Laboratory for Evolution and Ecological Effect in Black Land, Ministry of Natural Resources, Shenyang 110034, China 3. Key Laboratory for Evolution and Ecological Effect in Black Land of Liaoning Province, Shenyang 110034, China
Geostatistical and multivariate analyses are effective methods to determine the source of heavy metal elements in the soil. The comparison of the contents and distribution of heavy metal elements in the topsoil and subsoil in different geological setting areas can provide a basis for studying the sources of heavy metal elements in the soil. As one of the areas with concentrated marsh wetlands in China, the Sanjiang Plain has a temperate humid and subhumid continental monsoon climate, is an important grain production base, and has a low degree of industrial activities. This study investigated the main factors affecting the distribution of heavy metal elements in the soil of cultivated land of the Sanjiang Plain on a regional scale. Samples were collected from the topsoil and subsoil of the Sanjiang Plain. The minimum, maximum, median, and average contents, coefficient of variation, and concentration coefficient of eight heavy metal elements (i.e., As, Cr, Cu, Hg, Ni, Cd, Pb, and Zn) in the samples were calculated. The results are as follows. The Sanjiang Plain has superior soil environmental quality. The topsoil samples had slightly lower contents of heavy metal elements except for Cd (e.g., As, Cr, Cu, Hg, Ni, Pb, and Zn) than the subsoil samples. All these elements in the topsoil samples had concentration coefficients less than 2, except for those in the topsoil samples collected at certain points, which had high concentration coefficients of Cd, Hg, and As elements. The main factors influencing heavy metal elements in the topsoil and subsoil in five soil parent material regions were determined through geostatistical and Pearson correlation analyses. The comprehensive analysis results show that elements Cr, Cu, Ni, and Zn mainly originate from the soil parent materials, and Cd, Hg, and As may also be affected by human activities in some areas.
宋运红, 杨凤超, 刘凯, 戴慧敏, 许江, 杨泽. 三江平原耕地土壤重金属元素分布特征及影响因素的多元统计分析[J]. 物探与化探, 2022, 46(5): 1064-1075.
SONG Yun-Hong, YANG Feng-Chao, LIU Kai, DAI Hui-Min, XU Jiang, YANG Ze. A multivariate statistical analysis of the distribution and influencing factors of heavy metal elements in the cultivated land of the Sanjiang Plain. Geophysical and Geochemical Exploration, 2022, 46(5): 1064-1075.
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