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采集了湘潭锰矿红旗分矿开采区、沙圹村恢复区的代表性当季蔬菜(莴笋叶Fruticicolidae、小白菜Brassica chinensis、香葱Allium schoenoprasum、空心菜Ipomoea aquatica)、废弃区的优势植物(商陆Phytolacca acinosa、野茼蒿Crassocephalum crepidioides、苍耳Xanthium sibiricum)和3个研究区的土壤,通过原子吸收分光光度法分析了Mn、Pb、Zn含量。结果表明:开采区蔬菜Mn含量(8.3~84.5 mg/kg)明显高于恢复区(2.7~55.6 mg/kg),开采区和恢复区蔬菜都明显受到Pb污染(0.6~33mg/kg),蔬菜Zn含量范围为1.9~6.5mg/kg;3个研究区域土壤重金属均明显超标,最严重的是Pb污染(1 993.5~2 213.5mg/kg)。商陆、野茼蒿和苍耳中重金属含量差异较大,对重金属的耐性强,其中商陆表现出最好的耐性与长势。研究结论对锰矿土地合理利用以及矿区土壤重金属治理提供一定的科学依据。
A series of representative seasonal vegetables (Fruticicolidae, Brassica chinensis, Allium schoenoprasum, Ipomoea aquatica) in the recovery area of Xiangtan Manganese Mine Hongqi Branch and Xiangtan Mangyang Village recovery area were collected. Phytolacca acinosa, Crassocephalum crepidioides, Xanthium sibiricum, and soils in three studied areas. The contents of Mn, Pb and Zn were analyzed by atomic absorption spectrophotometry. The results showed that the contents of manganese (8.3 ~ 84.5 mg / kg) in vegetables in the mining area were significantly higher than those in the recovery area (2.7 ~ 55.6 mg / kg), and the vegetables in the mining area and the recovery area were obviously contaminated by Pb (0.6-33 mg / Zn content ranged from 1.9 mg / kg to 6.5 mg / kg. The heavy metals in soils were significantly exceeded in the three study areas, the most serious being Pb contamination (1 993.5-2 21.5 mg / kg). The contents of heavy metals in Pokeweed, Artemisia selengensis and Xanthium sibiricum differed greatly, and their tolerance to heavy metals was strong. The commercial pods exhibited the best patience and growth. The conclusion of the study provides some scientific basis for the rational utilization of manganese ore and the management of soil heavy metal in mining area.