云南地区大气降水中重金属离子形态污染特征研究

Study on the Pollution Characteristics of Heavy Metal Ion Formsin Atmospheric Precipitation in Yunnan Region

重金属作为典型的污染物以颗粒物的形式广泛存在于大气环境中,不仅通过人类呼吸系统呼吸进入人体,还会通过大气降水方式沉降至地表环境中造成土壤重金属污染,进而破坏生态系统并使农作物重金属含量超标。采用电感耦合等离子体质谱仪对云南地区大气降水中重金属离子形态污染特征进行了分析和研究。结果表明:云南地区大气降水中重金属离子重点以溶解态形式存在,且具有明显的季节性特征和空间特征,不同功能区的重金属的浓度不同,大气降水中重金属离子的富集因子在溶解态中较强,污染的主要来源为人为原因。

Heavy metals,as typical pollutants,are widely present in the atmospheric environment in the form of particulate matter.They not only enter the human respiratory system through respiration,but also settle into the surface environment through atmospheric precipitation,causing soil heavy metal pollution,thereby damaging the ecosystem and causing excessive heavy metal content in crops.Analyzes and studies the pollution characteristics of heavy metal ion forms in atmospheric precipitation in Yunnan region using inductively coupled plasma mass spectrometry.The results show that heavy metal ions in atmospheric precipitation in Yunnan Province mainly exist in dissolved form,with obvious seasonal and spatial characteristics.The concentration of heavy metals varies in different functional areas,and the enrichment factor of heavy metal ions in atmospheric precipitation is strong in dissolved form.The main source of pollution is human factors.