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目的调查土壤中重金属的污染状况,为政府制定政策提供依据。方法随机抽取3个旗县区,每个旗县区抽取20个村庄的土壤作为样本。采用GB/T 17141—1997《土壤质量铅、镉的测定石墨炉原子吸收分光光度法》、GB/T17140—1997《土壤质量铅、镉的测定KI-MIBK萃取火焰原子吸收分光光度法》和NY/T 1377—2007《土壤p H的测定》进行,根据GB 15618—1995《土壤环境质量标准》进行评价。结果目前赤峰市林西县、克什克腾旗、宁城县3个地区土壤状况质量良好,未受到过多污染。但是克什克腾旗20个村庄土壤平均p H值2014年和2015年较2013年有4%和3%的增幅,p H值有上升趋势。结论赤峰市林西县、克什克腾旗、宁城县3个地区2013年-2015年土壤中铅和镉的含量均符合判定标准要求。
Objective To investigate the pollution status of heavy metals in soils and provide basis for the government to formulate policies. Methods Three counties were randomly selected, and the soil samples from 20 villages in each counties were selected as samples. Using GB / T 17141-1997 “Determination of lead and cadmium in soil quality graphite furnace atomic absorption spectrophotometry” GB / T17140-1997 “Determination of lead and cadmium in soil quality - KI-MIBK extraction Flame atomic absorption spectrophotometry” and NY / T 1377-2007 “soil p H determination” carried out according to GB 15618-1995 “soil environmental quality standards” for evaluation. Results At present, the soil quality in Linxi County, Keshiketeng Banner and Ningcheng County in Chifeng City is in good condition and has not been polluted excessively. However, soil p H in 20 villages in Hexishteng Banner increased by 4% and 3% respectively from 2014 and 2015, and the value of p H increased. Conclusion The contents of lead and cadmium in soil in Linxi County, Keshiketeng Banner, Ningcheng County in Chifeng City from 2013 to 2015 all met the criteria of judgment.