许昌市园林绿地表层土壤磁性特征研究
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摘要
为了探讨许昌市园林绿地的土壤污染状况,对许昌市园林绿地表层土壤的磁性特征进行了研究.结果表明:许昌市园林绿地表层土壤磁化率变幅为15. 24×10-8~139. 33×10-8m3·kg-1,平均值为56. 97×10-8m3·kg-1;频率磁化率的范围为1. 12%~17. 51%,平均值为7. 33%.许昌市园林绿地73. 0%的样点为土壤重金属无污染(I级),27. 0%的样点属轻度污染(II级).不同功能区园林绿地表层土壤磁化率表现为工业区>公园>居住区>交通道路>学校>农田,频率磁化率为农田>交通道路>居住区>学校>公园>工业区.土壤磁化率空间分布呈现出由郊区向市区升高的趋势,反映了人类活动强度差异对园林绿地表层土壤磁性特征的影响.
In order to study the soil pollution status of green lands in Xuchang city,the magnetic characteristics of surface soil of green lands in Xuchang city were studied. The results showed that the value of magnetic susceptibility ranged from 15. 24 × 10-8 m3·kg-1 to 139. 33 × 10-8 m3·kg-1,with the average of 56. 97 × 10-8 m3·kg-1. The range of frequency magnetic susceptibility was between 1. 12% and 17. 51%,with the average of7. 33%. The proportions of slightly polluted soils and unpolluted soils were 27. 0% and 73. 0%,respectively.The magnetic susceptibility followed the order of industrial district > park > residential district > traffic district >school > farmland. The order of frequency magnetic susceptibility was farmland > traffic district > residential district > school > park > industrial district. The spatial distribution of soil magnetic susceptibility showed an upward trend from suburbs to urban areas,reflecting the influence of human activity intensity on the magnetic characteristics of surface soil in green lands.
In order to study the soil pollution status of green lands in Xuchang city,the magnetic characteristics of surface soil of green lands in Xuchang city were studied. The results showed that the value of magnetic susceptibility ranged from 15. 24 × 10-8 m3·kg-1 to 139. 33 × 10-8 m3·kg-1,with the average of 56. 97 × 10-8 m3·kg-1. The range of frequency magnetic susceptibility was between 1. 12% and 17. 51%,with the average of7. 33%. The proportions of slightly polluted soils and unpolluted soils were 27. 0% and 73. 0%,respectively.The magnetic susceptibility followed the order of industrial district > park > residential district > traffic district >school > farmland. The order of frequency magnetic susceptibility was farmland > traffic district > residential district > school > park > industrial district. The spatial distribution of soil magnetic susceptibility showed an upward trend from suburbs to urban areas,reflecting the influence of human activity intensity on the magnetic characteristics of surface soil in green lands.
引文
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[14]李珊,胡雪峰,杜艳,等.上海嘉定区表土磁性强度的空间分异及环境指示意义[J].土壤学报,2012,49(1):9-17.
[15]刘宇峰,张仁霞,高改妮,等.城市不同功能区绿地土壤有机质和磁化率特征及其相关性研究—以咸阳市为例[J].科学技术与工程,2015,15(5):311-317.
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[2]卢瑛,龚子同,张甘霖.城市土壤磁化率特征及其环境意义[J].华南农业大学学报,2001,22(4):26-28.
[3] Flanders P J. Identifying Fly Ash at a Distance from Fossil Fuel Power Stations[J]. Environmental Science&Technology,1999,33(4):528-532.
[4] Hanesch M,Scholger M,Rey D. Mapping dust distribution around an industrial site by measuring magnetic parameters of tree leaves[J]. Atmospheric Environment,2003,37(36):5 125-5 133.
[5] Blundell A,Hannam J A,Dearing J A,et al. Detecting atmospheric pollution in surface soils using magnetic measurements:A reappraisal using an England and Wales Database[J]. Environmental Pollution,2009,157(10):2 878-2 890.
[6] Hay K L,Dearing J A,Baban S M J,et al. A preliminary attempt to indentify atmospherically-derived pollution particles English topsoils from magnetic susceptibility measurements[J]. Physics&Chemistry of the Earth,1997,22(1):207-210.
[7] Bityukova L,Scholger R,Birke M. Magnetic susceptibility as indicator of environmental pollution of soils in Tallinn[J].Physics&Chemistry of the Earth Part A Solid Earth&Geodesy,1999,24(9):829-835.
[8] Baghdadi M E,Sajieddine M,Nadem S. Heavy metal pollution and soil magnetic susceptibility in urban soil of Beni Mellal City(Morocco)[J]. Environmental Earth Sciences,2012,66(1):141-155.
[9]卢升高,白世强.杭州城区土壤的磁性与磁性矿物学及其环境意义[J].地球物理学报,2008,51(3):762-769.
[10]李晓庆,胡雪峰,孙为民,等.城市土壤污染的磁学监测研究[J].土壤,2006,38(1):66-74.
[11]张贞.许昌市城市绿地园林植物调查及应用研究[D].开封:河南大学,2012.
[12] Wang B,Xia D S,Ye Y,et al. Magnetic records of heavy metal pollution in urban topsoil in Lanzhou,China[J]. Science Bulletin,2013,58(3):384-395.
[13]刘德新,马建华,孙艳丽,等.开封市城市土壤磁化率空间分布及对重金属污染的指示意义[J].土壤学报,2014,51(6):1 242-1 250.
[14]李珊,胡雪峰,杜艳,等.上海嘉定区表土磁性强度的空间分异及环境指示意义[J].土壤学报,2012,49(1):9-17.
[15]刘宇峰,张仁霞,高改妮,等.城市不同功能区绿地土壤有机质和磁化率特征及其相关性研究—以咸阳市为例[J].科学技术与工程,2015,15(5):311-317.
[16]张孔合.城市样带土壤环境磁学基本特征及其对土壤重金属污染的指示性研究[D].上海:上海师范大学. 2014.