宝鸡市滨河路不同植被环境污染的磁学响应

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摘要为理解城市道路绿化带不同植被叶片附尘对污染的磁学响应，对宝鸡市滨河路不同类型的植被叶片进行系统的环境磁学实验分析.结果表明，植被叶片中磁性矿物含量相对较低，主要的载磁矿物为假单畴和多畴的亚铁磁性矿物，同时含有赤铁矿，灌木植被叶片的磁性矿物浓度与粒径均大于乔木，其中χ_lf值平均值为6.49×10^-8m³/kg，相比较校园清洁区的植被叶片，表现出较高的浓度.滨河路植被叶片的饱和等温剩磁（SIRM）和非磁滞剩磁磁化率（χ_ARM）的变化范围分别为（964~1226）×10^-6Am²/kg和（9.9~44.7）×10^-8m³/kg，同样也都远高于校园植被叶片（453~771）×10^-6Am²/kg和（6.8~15.1）×10^-8m³/kg，表明亚铁磁性矿物的相对含量较高.磁学参数表现出一定的空间变化规律，随着高度的增大，植被叶片含有的磁性矿物浓度和粒径逐渐递减.随着高度逐渐递减.同一高度内不同种类植被记录的环境污染各有差异，灌木植被紫金叶女贞的叶片样品中含有较高的磁性矿物浓度，指示其具有更好的滞尘和防治污染的能力.植被叶片的磁性矿物浓度在滨河路东段十字路口与西段路口呈现两个高值中心，指示两个污染相对较为严重的区域.

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	张俊辉
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	王彦虎

关键词 ：宝鸡市, 磁学特征, 植被, 环境污染

Abstract：By exploring the magnetic response of environmental pollution about different vegetation leaves in urban street, the environmental magnetism of the different vegetation leaves was analyzed in Binhe street. The results show that the concentration of magnetic mineral samples was relatively low, magnetic domain was mainly composed by coarse particles of PSD (pseudo single domain) and MD (multidomain grain). The particle size of magnetic mineral of shrub vegetation was greater than arbor vegetation in the leaves. The average value of χ_lf was 6.49×10^-8m³/kg, compared with the campus clean area vegetation blade, showed high concentration. The SIRM and χ_ARM range was (964~1226)×10^-6Am²/kg and (9.9~44.7)×10^-8m³/kg, were also much higher than the campus vegetation blade, Which was (453~771)×10^-6Am²/kg and (6.8~15.1)×10^-8m³/kg, show that the relative content of ferrous magnetic minerals was higher. The magnetic mineral concentration and the particle size of the vegetation leaves in Binhe street decreased with the increasing of height. Different kinds of vegetation within the same height have different environmental effects in Binhe street. The magnetic mineral concentration and particle size of Gold leaf privet present a higher value, which indicated its had better dust detention and the ability to prevent and control pollution. In addition, in the east section of Binhe street and western intersection, The magnetic mineral of vegetation leaves appears high value center, which indicates the heavy pollution.

Key words： Binhe street magnetic parameters vegetation pollution

收稿日期: 2017-10-22

:	X169
	X513

基金资助:陕西省教育厅科学研究计划重点项目资助（17JS004）

通讯作者: 张俊辉,副教授,bwlzjh@126.com E-mail: bwlzjh@126.com

作者简介: 张俊辉(1978-),男,陕西咸阳人,副教授,博士,主要从事环境磁学与全球气候变化.发表论文10余篇.

引用本文:

张俊辉, 姜珊, 刘滨, 王彦虎. 宝鸡市滨河路不同植被环境污染的磁学响应[J]. 中国环境科学, 2018, 38(5): 1893-1904. ZHANG Jun-hui, JIANG Shan, LIU Bin, WANG Yan-hu. Magnetic response of environmental pollution about different vegetation leaves in Binhe Street of Baoji City. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(5): 1893-1904.

链接本文:

http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2018/V38/I5/1893

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