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[1]CHU Chunjie,ZHOU Jinfeng.Soil Physicochemical Properties and Quality Assessment in the Hilly Upland Around Pingdingshan Coal Mining Area[J].Research of Soil and Water Conservation,2018,25(01):104-110.

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Soil Physicochemical Properties and Quality Assessment in the Hilly Upland Around Pingdingshan Coal Mining Area

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 25 Number of periods: 2018 01 Page number: 104-110 Column: Public date: 2018-02-28

Title:: Soil Physicochemical Properties and Quality Assessment in the Hilly Upland Around Pingdingshan Coal Mining Area

Author(s):: CHU Chunjie¹, ZHOU Jinfeng^2,3; 1. College of Tourism and Planning, Pingdingshan University, Pingdingshan, He’nan 467000, China;
2. College of Chemistry and Environmental Engineering, Pingdingshan University, Pingdingshan, He’nan 467000, China;
3. School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China

Keywords:: upland soil; soil physicochemical properties; heavy metal pollution; soil quality; hilly; Pingdingshan coal mining area

CLC:: S153

DOI:: -

Abstract:: Soils in the hilly upland in Pingdingshan coal mining area were selected as test samples, soil physical and chemical properties and heavy metals including Cu, Zn, Cr, Ni and Pb at different altitudes and different distances from the mining area downwind were investigated by means of sampling, experimental analysis. The upland soil quality was evaluated by method of Entropy Weight-TOPSIS. The results are showed as follows. (1) Sand content in different altitude slope soil was significantly higher than clay, in which the sand content of soil near the mining area was the highest but the clay content was the lowest. On the upland above the mining area, sand content of soil reduced, but clay increased and reached up to the highest near the slope top. The soil on the slope was alkaline near the mining area, however, the soil at the altitude above 356 meters was acidic, and the acidity increased with the increase of altitude. Soil electrical conductivity, contents of organic matter, available K, total P and available P contents around the mining area were the highest, but slightly enriched near the slope top; total N fluctuated greatly along the upland, but significantly enriched near the slope top. The contents of total K and alkali solution N were the lowest near the mining area, were the highest near the top. (2) The closer the distance from the mining zone off the wind direct was, the higher the sand grain content was, and the lower the clay content was; otherwise, sand content tended to decrease, while clay content tended to increase. Soil pH value, electrical conductivity, organic matter, total N and total P decreased with the increase of distance. The highest concentrations were found within the range from 100 to 200 meters off the wind direct, and followed by the fluctuant decrease with the increase of distance. (3) At different altitudes, the soil quality around the mining zone was better than that of the slope bottom, especially, poor above the mining zone. The soil quality tended to become worse with the increase of the distance off the wind direct. The variety of soil quality were not only related to the shallow soil and soil characteristics in mining area, but also mainly associated with the soil disturbance by long-term coal mining activities, the slope runoff migration, high altitude air transmission, terrain block and deposition of the fly ash, dust and heavy metal elements released by mining activities. In addition, soil quality also had a certain relationship with the farmland agricultural activities.

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