摘要
为揭示土壤磁性物质的来源和成因,对漳州市城区4个不同绿地功能区土壤进行了环境磁学测定,并探讨其环境意义.结果表明,土壤样品的磁化率(χ)平均值为302.77×10-8m3/kg,频率磁化率(χfd)平均值为1.45%,不同绿地功能区土壤磁化率变化趋势为居住区绿地>道路绿地>单位附属绿地>公园绿地.分析4种绿地功能区的频率磁化率可以得知,公园绿地存在超顺磁颗粒.对单个采样点进行分析发现,磁化率与频率磁化率呈负相关,饱和等温剩磁(SIRM)和软剩磁(Soft IRM)呈极显著正相关,饱和等温剩磁和硬剩磁(Hard IRM)的相关性不强,表明土壤磁化率的变化主要受亚铁磁性矿物控制,但也存在不完整反铁磁性物质的贡献,土壤磁化率的增强与工业排放、机动车尾气等人类活动有关.
In order to determine the source and cause of soil magnetic substances, a detailed magnetic study was conducted in the four different urban greenbelts in Zhangzhou City. The results showed that the average value of magnetic susceptibility was 302.77 ×10^-8 m3/kg, and the χfd was 1.45%. The magnetic susceptibility decreased in the order of residential greenbelt 〉 road greenbelt 〉 accessory greenbelt 〉 park greenbelt. Based on analysis of the χfd , SP was found to exist in the soil of the park greenbelt. Analysis of the individual sampling points showed that magnetic susceptibility was strongly and negatively correlated with frequency dependent susceptibility, and there was a significant positive correlation between SIRM and the Soft IRM. However, the correlation between SIRM and the Hard IRM was very weak. These results indicate that the magnetic susceptibility was mainly controlled by ferrimagnetic minerals, with some antiferromagnets also contributing. The enhancement of magnetic susceptibility was correlated with vehicle exhaust, industrial discharge and other human activities.
出处
《环境科学研究》
EI
CAS
CSCD
北大核心
2012年第9期993-997,共5页
Research of Environmental Sciences
基金
中国科学院城市环境与健康重点实验室开放基金项目(KLUEH201001)
国家自然科学基金项目(41171232)
福建省自然科学基金项目(2009J05094)
关键词
漳州市
城市绿地
环境磁学
土壤污染
Zhangzhou City
urban greenbelt
environmental magnetism
soil pollution
