铅锌冶炼区大气颗粒物中典型重金属及来源分析

来源 :第十一届全国气溶胶会议暨第十届海峡两岸气溶胶技术研讨会 | 被引量 : 0次 | 上传用户:jk479150
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湖南是我国有名的“有色冶炼之乡”,有色冶炼排放的废气成为我国大气重金属的主要来源之一。为了了解铅锌冶炼所排放的废气中典型重金属元素组分,在湖南省中部某铅锌冶炼工业区周边及铅锌冶炼企业进行了大气颗粒物样品采集及分析。研究表明,位于铅锌冶炼工业区下风向的采样点大气颗粒物中镉(Cd)、铅(Pb)和砷(As)的浓度明显高于其它站点,而铬(Cr)浓度与其它站点相差不大;粒径分布也表明,颗粒物、Cd、Pb和As的最大浓度位于1.1~2.1μm之间,具有非常相似的变化趋势,而Cr无明显的粒径分布特征;对铅、锌冶炼企业废气、底渣的样品采集分析表明,Cd、Pb和As会以废气的形式排到大气中,Cr通常会进入废渣。
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