Research on the Characteristics of Soil Heavy Metal Pollution and Ecological Restoration in Grassland Mining Area of Sunite County

doi:10.13466/j.cnki.lyzygl.2017.06.022

Abstract

Abstract:

On the basis of meteorological data of mining area in Sunite County and the surrounding prairie soil heavy metal content in a grassland mining area,analysis of drift potential and soil heavy metal pollution characteristics of the grassland mining area was conducted.The results showed that the heavy metal pollution in the investigation area was mainly concentrated on the lower wind direction,which is the dominant wind direction centered on the tailing storehouse.Sunite County is an area severely affected by erosions.The tailings and slag sediment cover measures shall be strengthened,prevention and control of wind and water erosion intensified and their effects in grassland soil heavy metal pollution reduced.Windbreaks and sand barriers shall be built to check the potential wind sand.Measures for ecological restoration and restoration of damaged ecosystems shall be taken.According to the regional characteristics,suggestions are put forward to ensure the healthy development of the ecologocal system and protect the health and safety of the local people and wildlife as well.

Key words: grassland mining area, heavy metal pollution, ecological restoration

CLC Number:

YUE Zhengwen, ZHANG Ruiqiang, WANG Jian, Gao Tianming, YANG Hao. Research on the Characteristics of Soil Heavy Metal Pollution and Ecological Restoration in Grassland Mining Area of Sunite County[J]. FOREST RESOURCES WANAGEMENT, 2017, (6): 124-130.

Figures/Tables 6

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等级划分	单项污染指数	综合污染指数	污染等级	污染水平
1	P_i≤0.7	P_N≤0.7	安全	清洁
2	0.7<P_i≤1.0	0.7<P_N≤1.0	警戒限	尚清洁
3	1.0<P_i≤2.0	1.0<P_N≤2.0	轻污染	土壤、作物开始受到污染
4	2.0<P_i≤3.0	2.0<P_N≤3.0	中污染	土壤、作物受中毒污染
5	P_i>3.0	P_N>3.0	重污染	土壤、作物受污染已相当严重

年(季)	主方向风频率			起沙风主方向频率
年	WSW	W	WNW	SSW	W	WNW
年	10.98	12.85	10.17	3.57	4.64	4.47
春	WSW	W	WNW	W	WNW	NW
春	10.58	13.59	11.86	6.85	7.29	6.74
夏	ENE	SE	SSW	SSW	WNW	NW
夏	8.20	9.07	10.63	1.74	1.33	1.24
秋	SW	WSW	W	SSW	W	WNW
秋	10.30	13.33	14.08	4.66	4.90	3.68
冬	WSW	W	WNW	W	WNW	NW
冬	14.33	17.28	13.91	6.18	6.09	3.56

年 (季)	输沙势 /VU	合成输沙势 /VU	合成输沙方向	方向变率指数
年	240.95	142.91	259°,W	0.59
春季	601.96	324.94	255°,WSW	0.54
夏季	111.56	62.08	274°,W	0.56
秋季	181.24	119.62	256°,WSW	0.66
冬季	146.48	102.49	254°,WSW	0.70

采样区	铜	铬	铅	镉	砷	汞
尾矿库	996.1	92.7	10.04	0.485	6.378	0.017
土壤背景值(A层)	12.9	36.5	15.0	0.0374	6.3	0.0278

采样区方向	单项污染指数			综合污染指数
采样区方向	镉	铬	铜	综合污染指数
SW	0.57	0.94	2.26	1.83
EN	8.15	1.07	24.24	18.87
SE	8.75	1.70	28.83	22.39
NW	0.91	0.76	1.41	1.23