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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 |
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Abstract 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.
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Received: 27 January 2022
Published: 03 January 2023
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Corresponding Authors:
YANG Feng-Chao
E-mail: yunhong408@163.com;yangfc123@163.com
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Sampling sketch map of soil sample from Sanjiang Plain
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参数 | As | Cd | Cr | Cu | Hg | Ni | Pb | Zn | Sc | 全部表层土壤,N=9873 | 平均值/10-6 | 8.85 | 0.083 | 65.09 | 21.76 | 0.034 | 25.69 | 25.62 | 63.52 | 11.75 | 中位数/10-6 | 8.40 | 0.075 | 65.30 | 21.90 | 0.031 | 24.90 | 25.5 | 62 | 11.9 | 变异系数/% | 37.26 | 50.83 | 18.78 | 22.16 | 54.73 | 22.73 | 10.70 | 20.87 | 15.51 | 数据范围/10-6 | 1.80~116.8 | 0.009~1.740 | 16.5~281 | 4~74 | 0.013~1.25 | 5.8~147 | 2.3~68.3 | 24.4~225.1 | 2.3~21.9 | (平均值±标准离差)/10-6 | 8.41±1.30 | 0.076±1.39 | 64.27±1.18 | 21.38±1.24 | 0.032±1.282 | 25.06±1.22 | 25.53±1.10 | 62.09±1.21 | 11.72±1.16 | 黑龙江省A层背景值[24]/10-6 | 7.3 | 0.086 | 58.6 | 20 | 0.037 | 22.8 | 24.2 | 70.7 | 10.79 | 全部深层土壤,N=2697 | 平均值/10-6 | 11.16 | 0.075 | 71.40 | 21.98 | 0.036 | 28.42 | 25.97 | 71.33 | 12.17 | 中位数/10-6 | 10.80 | 0.072 | 75.30 | 23.6 | 0.035 | 29.50 | 26.3 | 73.6 | 13.1 | 变异系数/% | 51.07 | 36.60 | 29.75 | 30.27 | 34.43 | 38.45 | 12.84 | 20.67 | 24.11 | 数据范围/10-6 | 1.82~225 | 0.013~0.36 | 9.6~371.6 | 2.5~98.25 | 0.006~0.274 | 3.4~294.4 | 10.75~49.6 | 13.8~142.5 | 1.6~24.6 | (平均值±标准离差)/10-6 | 10.50±1.34 | 0.071±1.40 | 73.11±1.19 | 21.78±1.32 | 0.034±1.34 | 27.48±1.31 | 25.82±1.13 | 72.44±1.19 | 12.42±1.22 | 黑龙江省C层背景值[24]/10-6 | 11.4 | 0.078 | 59.5 | 21 | 0.040 | 24.3 | 24.4 | 69.9 | 无 | 第四系表层,N=8383 | 平均值/10-6 | 8.21 | 0.079 | 65.50 | 21.88 | 0.032 | 25.43 | 25.18 | 60.47 | 11.65 | 中位数/10-6 | 8.00 | 0.072 | 65.70 | 22.40 | 0.031 | 24.80 | 25.10 | 58.00 | 11.80 | 变异系数/% | 27.55 | 44.36 | 18.15 | 21.39 | 47.43 | 19.61 | 9.16 | 20.45 | 15.93 | 数据范围/10-6 | 1.80~43.45 | 0.009~1.167 | 16.5~121.6 | 4~49.4 | 0.013~0.986 | 8.08~47.9 | 9.2~61.75 | 27.4~212.1 | 2.9~19.1 | (平均值±标准离差)/10-6 | 7.96±1.26 | 0.074±1.42 | 64.86±1.19 | 21.52±1.24 | 0.031±1.253 | 25.00±1.21 | 25.12±1.08 | 59.16±1.21 | 11.61±1.16 | 变质岩表层,N=454 | 平均值/10-6 | 10.32 | 0.093 | 69.98 | 21.64 | 0.034 | 27.11 | 27.90 | 72.45 | 12.29 | 中位数/10-6 | 9.98 | 0.083 | 70.00 | 21.45 | 0.030 | 26.50 | 27.40 | 71.05 | 12.40 | 变异系数/% | 41.44 | 59.11 | 20.61 | 24.02 | 50.82 | 23.00 | 12.39 | 21.32 | 13.01 | 数据范围/10-6 | 1.84~59.70 | 0.023~0.790 | 31.40~197.8 | 9.15~55.15 | 0.015~0.258 | 10.40~62.10 | 19.40~53.20 | 42.00~213.4 | 6.76~17.2 | (平均值±标准离差)/10-6 | 9.71±1.32 | 0.083±1.30 | 68.39±1.17 | 20.94±1.23 | 0.031±1.303 | 26.61±1.23 | 27.67±1.11 | 70.47±1.18 | 12.27±1.14 | 沉积岩表层,N=481 | 平均值/10-6 | 10.15 | 0.085 | 68.78 | 21.52 | 0.035 | 25.71 | 27.29 | 66.42 | 12.32 | 中位数/10-6 | 10.40 | 0.077 | 68.80 | 21.30 | 0.032 | 24.60 | 27.10 | 63.90 | 12.40 | 变异系数/% | 24.45 | 44.98 | 18.45 | 18.35 | 37.57 | 24.55 | 11.78 | 18.10 | 13.10 | 数据范围/10-6 | 4.32~19.4 | 0.032~0.445 | 29.85~167.7 | 9~39 | 0.018~0.180 | 9.3~67.2 | 19.9~46.6 | 44~119.7 | 6.58~18 | (平均值±标准离差)/10-6 | 9.89±1.29 | 0.077±1.34 | 67.45±1.15 | 21.23±1.18 | 0.032±1.265 | 24.94±1.22 | 27.04±1.12 | 65.16±1.18 | 12.25±1.13 | 花岗岩表层,N=251 | 平均值/10-6 | 10.03 | 0.085 | 69.16 | 20.40 | 0.039 | 26.73 | 28.03 | 71.55 | 12.06 | 中位数/10-6 | 9.70 | 0.081 | 68.10 | 20.10 | 0.032 | 25.60 | 27.80 | 69.90 | 12.20 | 变异系数/% | 38.19 | 30.83 | 21.65 | 20.20 | 198.07 | 22.73 | 14.36 | 15.21 | 12.20 | 数据范围/10-6 | 3.80~33.05 | 0.030~0.255 | 36.9~170 | 11.5~33.8 | 0.016~1.25 | 13.1~56.2 | 20.2~46 | 46.7~108.7 | 8.26~15.4 | (平均值±标准离差)/10-6 | 9.31±1.37 | 0.081±1.27 | 66.99±1.17 | 20.0±1.23 | 0.032±1.309 | 25.88±1.21 | 27.67±1.14 | 70.80±1.16 | 11.97±1.14 | 参数 | As | Cd | Cr | Cu | Hg | Ni | Pb | Zn | Sc | 火山岩表层,N=304 | 平均值/10-6 | 10.85 | 0.083 | 73.79 | 23.18 | 0.033 | 28.20 | 26.69 | 67.84 | 12.86 | 中位数/10-6 | 9.99 | 0.080 | 69.85 | 22.90 | 0.031 | 26.15 | 26.40 | 67.05 | 12.70 | 变异系数/% | 50.85 | 28.56 | 25.29 | 21.77 | 29.46 | 31.06 | 11.73 | 16.48 | 14.02 | 数据范围/10-6 | 4.76~63.80 | 0.041~0.20 | 45~163.3 | 13.05~43.2 | 0.019~0.095 | 15.8~65.50 | 17.3~37.60 | 43.35~105.3 | 7.51~21.8 | (平均值±标准离差)/10-6 | 9.84±1.30 | 0.079±1.31 | 71.45±1.25 | 22.65±1.23 | 0.032±1.276 | 26.92±1.31 | 26.49±1.12 | 66.99±1.18 | 12.74±1.13 | 第四系深层,N=2214 | 平均值/10-6 | 10.98 | 0.074 | 69.61 | 21.88 | 0.036 | 27.99 | 26.09 | 70.11 | 12.02 | 中位数/10-6 | 10.65 | 0.070 | 76.30 | 24.30 | 0.036 | 30.30 | 26.60 | 72.60 | 13.20 | 变异系数/% | 45.32 | 37.47 | 25.88 | 29.19 | 27.86 | 27.32 | 12.53 | 21.29 | 25.19 | 数据范围/10-6 | 2.35~225 | 0.013~0.22 | 9.6~262 | 2.5~38.9 | 0.006~0.095 | 3.4~146.9 | 14~49.6 | 13.8~120.8 | 1.6~24.6 | (平均值±标准离差)/10-6 | 10.30±1.31 | 0.070±1.45 | 71.78±1.22 | 21.63±1.35 | 0.034±1.33 | 27.42±1.32 | 26.00±1.13 | 70.80±1.21 | 12.05±1.28 | 变质岩深层,N=115 | 平均值/10-6 | 12.58 | 0.075 | 84.87 | 23.53 | 0.037 | 30.04 | 28.17 | 77.15 | 12.84 | 中位数/10-6 | 11.20 | 0.073 | 83.50 | 23.4 | 0.032 | 30.50 | 28 | 78.70 | 13.40 | 变异系数/% | 140.56 | 31.04 | 33.76 | 40.02 | 41.26 | 45.93 | 12.75 | 16.17 | 19.40 | 数据范围/10-6 | 2.27~225 | 0.028~0.18 | 12.9~301.3 | 3.5~98.25 | 0.011~0.128 | 5.2~154.4 | 10.75~40.3 | 21~117.5 | 2.96~24.6 | (平均值±标准离差)/10-6 | 10.94±1.28 | 0.071±1.32 | 82.04±1.16 | 22.18±1.29 | 0.034±1.38 | 28.91±1.23 | 28.18±1.11 | 76.56±1.18 | 12.91±1.16 | 沉积岩深层,N=131 | 平均值/10-6 | 11.32 | 0.073 | 80.62 | 23.03 | 0.038 | 29.63 | 27.32 | 74.15 | 12.91 | 中位数/10-6 | 11.30 | 0.071 | 79.80 | 23.6 | 0.037 | 29.20 | 27.3 | 75.00 | 13.20 | 变异系数/% | 28.61 | 30.57 | 20.99 | 22.93 | 32.25 | 26.65 | 11.71 | 14.90 | 17.76 | 数据范围/10-6 | 2.66~28.4 | 0.017~0.20 | 15.75~180.7 | 4.7~40.6 | 0.013~0.115 | 6.9~68.00 | 17.80~40.3 | 39.5~108.3 | 3.96~19.2 | (平均值±标准离差)/10-6 | 10.99±1.24 | 0.070±1.30 | 79.62±1.16 | 22.86±1.24 | 0.036±1.32 | 28.45±1.27 | 27.23±1.11 | 73.45±1.17 | 12.97±1.17 | 花岗岩深层,N=134 | 平均值/10-6 | 10.43 | 0.072 | 83.90 | 22.62 | 0.038 | 32.09 | 27.50 | 77.39 | 12.96 | 中位数/10-6 | 11.0 | 0.071 | 80.60 | 21.60 | 0.035 | 29.40 | 27.7 | 78.6 | 13.1 | 变异系数/% | 27.39 | 26.53 | 32.29 | 34.66 | 37.41 | 68.26 | 11.76 | 15.79 | 17.73 | 数据范围/10-6 | 3.72~21.3 | 0.041~0.16 | 24.9~251.1 | 8.1~76.1 | 0.015~0.128 | 9.9~202.9 | 14.2~35.1 | 48.4~117.7 | 7.28~24.3 | (平均值±标准离差)/10-6 | 10.26±1.32 | 0.070±1.29 | 78.52±1.16 | 21.33±1.27 | 0.035±1.32 | 28.84±1.23 | 27.48±1.12 | 76.38±1.17 | 12.79±1.16 | 火山岩深层,N=105 | 平均值/10-6 | 11.47 | 0.081 | 93.37 | 26.93 | 0.037 | 41.64 | 25.72 | 80.67 | 14.30 | 中位数/10-6 | 10.95 | 0.079 | 81.20 | 24.80 | 0.036 | 32.60 | 26.1 | 80.6 | 14.2 | 变异系数/% | 31.55 | 36.26 | 41.49 | 36.68 | 29.78 | 88.93 | 12.25 | 17.21 | 19.78 | 数据范围/10-6 | 2.39~28.4 | 0.032~0.33 | 45.4~262.6 | 10.2~76.1 | 0.013~0.115 | 15.5~294.4 | 14.2~40.5 | 42.8~142.5 | 6.15~24.3 | (平均值±标准离差)/10-6 | 11.09±1.23 | 0.076±1.34 | 82.99±1.27 | 24.83±1.21 | 0.036±1.27 | 33.19±1.37 | 25.88±1.10 | 80.17±1.15 | 14.19±1.15 |
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The statistical data of heavy metal elements in topsoils and subsoils from Sanjiang Plain
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Histograms for heavy metal elements in topsoils from Sanjiang Plain
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Box-plot diagram for heavy metal elements in topsoils from Sanjiang Plain
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Box-plot diagram for heavy metal elements insubsoils from Sanjiang Plain
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Histograms for heavy metal elements in subsoils from Sanjiang Plain
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Spatial distribution of heavy metal elements concentrations in the top soil from Sanjiang Plain
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Spatial distribution of heavy elements concentrations in the deep soil from Sanjiang Plain
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元素 | Pearson相关系数 | 第四系 | 变质岩 | 沉积岩 | 花岗岩 | 火山岩 | As | 0.018 | 0.009 | 0.380** | 0.266** | 0.216** | Cd | 0.332** | 0.178** | 0.176** | 0.091 | 0.140* | Cr | 0.602** | 0.185** | 0.480** | 0.395** | 0.625** | Cu | 0.584** | 0.308** | 0.440** | 0.512** | 0.414** | Hg | 0.137** | 0.250** | 0.218** | 0.100 | 0.249** | Ni | 0.500** | 0.252** | 0.527** | 0.488** | 0.449** | Pb | 0.264** | 0.206** | 0.268** | 0.367** | 0.045 | Zn | 0.314** | 0.333** | 0.299** | 0.203** | 0.470** |
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The Pearson correlation coefficient between heavy metal elements in topsoils and subsoils from Sanjiang Plain
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