CAJ | 학술논문

重金属在污染土壤中的形态分布决定着重金属的迁移性和危害的程度。土壤重金属形态分析应用最多的是Tessi-er和BCR连续提取法。Tessier和BCR连续提取法没有考虑土壤样品的特征。美国环保署危险废物浸出毒性鉴别标准法虽然考虑土壤pH值，但没有划分形态。采集不同pH土样，结合Tessier、BCR和毒性浸出鉴别方法的特征，优化出针对不同pH值土壤的连续提取方法，将土壤中重金属划分为活性态、次生碳酸盐结合态、次稳定态和稳定态。用优化的连续提取方法对土样进行连续提取，重金属回收率为85％～115％。优化连续提取方法的结果与Tessier和BCR结果对比显示优化连续提取方法克服了Tessier连续提取法对非石灰质土壤提取过量BCR连续提取法对石灰质土壤提取不足的缺点。优化后的连续提取方法数据稳定可靠，可作为重金属形态分析方法使用。
중금속재오염토양중적형태분포결정착중금속적천이성화위해적정도。토양중금속형태분석응용최다적시Tessi-er화BCR련속제취법。Tessier화BCR련속제취법몰유고필토양양품적특정。미국배보서위험폐물침출독성감별표준법수연고필토양pH치，단몰유화분형태。채집불동pH토양，결합Tessier、BCR화독성침출감별방법적특정，우화출침대불동pH치토양적련속제취방법，장토양중중금속화분위활성태、차생탄산염결합태、차은정태화은정태。용우화적련속제취방법대토양진행련속제취，중금속회수솔위85％～115％。우화련속제취방법적결과여Tessier화BCR결과대비현시우화련속제취방법극복료Tessier련속제취법대비석회질토양제취과량BCR련속제취법대석회질토양제취불족적결점。우화후적련속제취방법수거은정가고，가작위중금속형태분석방법사용。
The environmental risks of heavy metals depend on its speciation distribution in contaminated soils. The chemical speciation analysis was one of the hot topics in environmental sciences.In recent years,the most popular sequential extraction procedures were Tessier and BCR.Nethier Tessier nor BCR sequential extraction methods considered the characteristics of soil samples.Although Toxicity Characteristic Leaching Procedure (TCLP)used two different extraction regent is based on the pH values of soil samples,it is a single step extrac-tion method.In this paper,compared with Tessier,BCR and TCLP extraction techniques,the speciation extrac-tion method was optimized in order to adapt soils with different pH values.The heavy metals in the soils were di-vided into active fraction,secondary carbonate fraction,secondary steady fraction and steady fraction.The re-sults show that the optimized sequential extraction method is more stable,the recovery rate is 85% to 1 15%which could satisfy the soil speciation evaluation requirements.And the optimized sequential extraction method is suitable for soils with different pH values.