盐池县禁牧封育区国道两侧土壤磁化率与土壤重金属含量的关系研究
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摘要
采集盐池县G20国道两侧土壤剖面土壤样品143样,测定样品的磁化率以及多种重金属元素含量。对土壤磁化率和重金属元素含量进行了特征分析。结果表明:研究区内土壤Χlf的变化范围为13～54×10~(-8)m~3/kg,土壤Χfd的变化范围为1. 92%～13. 51%,研究区内土壤样品中Mn、As、Cu和Pb元素含量平均分别为308. 01mg/kg、8. 15 mg/kg、11. 76 mg/kg和15. 10 mg/kg。土壤低频磁化率与高频磁化率之间呈显著正相关,低频和高频磁化率均于频率磁化率呈显著负相关。土壤样品的磁化率与Mn、As、Pb和Cu含量呈现显著相关,相关系数分别为:0. 599、0. 338、0. 521和0. 222;与4种元素的污染负荷指数呈显著最正相关,相关系数为0. 421。磁化率可以指示盐池县G20国道两侧土壤重金属的单一污染水平和综合污染水平,可以反映土壤污染主要来源为交通污染。
A total of 143 samples were collected from soil profiles on both sides of the G20 national road in Yanchi county and the magnetic susceptibility of the sample was determined. The characteristics of soil magnetic susceptibility and content of heavy metal elements in soil were also measured. The results show that: the variation range of soil Χlf was 13 ～ 54 × 10~(-8) m~3/kg,and the variation range of soil Χfd was 1. 92% ～ 13. 51%. The average contents of Mn,As,Cu and Pb in soil samples were 308. 01 mg/kg,8. 15 mg/kg,11. 76 mg/kg and 15. 10 mg/kg,respectively. Soil low frequency magnetic susceptibility and high frequency magnetic susceptibility was significantly positive correlated,and both low frequency and high frequency magnetic susceptibility are negatively correlated with frequency magnetic susceptibility. Magnetic susceptibility of soil samples was significantly correlated with Mn,As,Pb and Cu contents,and the correlation coefficients were 0. 599,0. 338,0. 521 and 0. 222,respectively. The pollution load index of the four elements showed the most significant positive correlation,and the correlation coefficient was0. 421. The magnetization rate can indicate the single pollution level and the comprehensive pollution level of heavy metals in the soil on both sides of the road in Yanchi county,which can reflect that the main source of soil pollution is traffic pollution.
A total of 143 samples were collected from soil profiles on both sides of the G20 national road in Yanchi county and the magnetic susceptibility of the sample was determined. The characteristics of soil magnetic susceptibility and content of heavy metal elements in soil were also measured. The results show that: the variation range of soil Χlf was 13 ～ 54 × 10~(-8) m~3/kg,and the variation range of soil Χfd was 1. 92% ～ 13. 51%. The average contents of Mn,As,Cu and Pb in soil samples were 308. 01 mg/kg,8. 15 mg/kg,11. 76 mg/kg and 15. 10 mg/kg,respectively. Soil low frequency magnetic susceptibility and high frequency magnetic susceptibility was significantly positive correlated,and both low frequency and high frequency magnetic susceptibility are negatively correlated with frequency magnetic susceptibility. Magnetic susceptibility of soil samples was significantly correlated with Mn,As,Pb and Cu contents,and the correlation coefficients were 0. 599,0. 338,0. 521 and 0. 222,respectively. The pollution load index of the four elements showed the most significant positive correlation,and the correlation coefficient was0. 421. The magnetization rate can indicate the single pollution level and the comprehensive pollution level of heavy metals in the soil on both sides of the road in Yanchi county,which can reflect that the main source of soil pollution is traffic pollution.
引文
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[15]王冠,陈裕颖,夏敦胜,等.上海城市表土磁性特征对重金属污染的指示作用[J].环境科学学报,2018,38(8):3302-3312.
[2]彭少华.城市道路灰尘的磁学响应与功能区环境污染研究[J].花炮科技与市场,2018,(1):97-100.
[3]郭高山,李永涛.武汉市道路尘埃污染中磁学指标与重金属含量对比[J].中国环境科学,2017,37(3):868-877.
[4]刘青松,邓成龙.磁化率及其环境意义[J].地球物理学报,2009,52(4):1041-1048.
[5]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,(4):26-28.
[6]曲赞.用于环境研究的磁性参数简介[J].地质科技情报,1994,(2):98-100,104.
[7] Khuzestani R B,Souri B. Evaluation of heavy metal contamination hazards in nuisance dust particles,in Kurdistan Province,western Iran[J]. Journal of Environmental Sciences 2013,25(7):1346-1354.
[8]王学松.城市表层土壤重金属富集淋滤特征和磁学响应[M].北京:中国环境科学出版社,2009:212-258.
[9]罗伟,谢贤健,陈婷旭,等.中小城市不同土地利用方式下土壤磁化率空间分布及对铅元素含量的指示意义[J].土壤通报,2017,48(1):53-60.
[10]陈轶楠.晋南某钢厂及其周边农田土壤重金属含量分析与污染状况评价[D].临汾:山西师范大学,2013.
[11]周汉民,王力波,王爱华,等.宁沪高速公路句容段两侧土壤磁化率特征[J].资源调查与环境,2006,(1):46-49.
[12]王学松.徐州城市路边表层土壤Pb,Cu和Zn污染的磁化率表征[J].淮海工学院学报(自然科学版),2007,(3):58-61.
[13]中国环境监测总站.中国土壤元素背景值[M].北京:中国环境科学出版社,1990,24:108-250.
[14]李鹏,强小科,唐艳荣,等.西安市街道灰尘磁化率特征及其污染指示意义[J].中国环境科学,2010,30(3):309-314.
[15]王冠,陈裕颖,夏敦胜,等.上海城市表土磁性特征对重金属污染的指示作用[J].环境科学学报,2018,38(8):3302-3312.