生态环境学报 ›› 2021, Vol. 30 ›› Issue (6): 1276-1285.DOI: 10.16258/j.cnki.1674-5906.2021.06.019
张军1,2(), 高煜1, 王国兰1, 金梓函1, 杨明航1
收稿日期:
2021-01-26
出版日期:
2021-06-18
发布日期:
2021-09-10
作者简介:
张军(1974年生),男,副教授,博士,硕士研究生导师,主要研究方向为区域重金属污染控制与风险评价。E-mail: zhangjun1190@126.com
基金资助:
ZHANG Jun1,2(), GAO Yu1, WANG Guolan1, JING Zihan1, YANG Minghang1
Received:
2021-01-26
Online:
2021-06-18
Published:
2021-09-10
摘要:
探析典型河谷城市土壤重金属空间污染特征及其影响因素,对城市污染防治具有重要意义。采集宝鸡市区62份表层土壤,使用电感耦合等离子体质谱仪(ICP-MS)测定8种重金属(As、Cd、Cr、Cu、Mn、Ni、Pb、Zn)含量,基于地统计空间插值与地理探测器方法,以地理、环境、气象等11种因子为自变量,各元素含量为因变量,探析典型河谷城市土壤重金属含量的空间分异及其影响因素。结果表明,宝鸡市区土壤8种重金属元素均超过陕西省土壤背景值,其中Cd和Zn质量分数均值达0.77、261.17 mg∙kg-1,为陕西省土壤背景值的8.19倍和3.76倍;Cd、Zn、As、Cu污染较严重,其分布主要集中在潘家湾立交桥、滨河路及马家坡,在空间上呈现一定的聚集性;降水对Cd的空间分布影响最大,而其他重金属主要受海拔高程影响。降水因子对Cd空间分布具有最强解释力(因子解释力PD, H达0.188),除Cd外,DEM(高程)对其余7种重金属含量空间分布均具有最强解释力;此外,交互作用的PD, H值均高于单个因素,表明复杂的环境条件加剧了土壤中重金属的积累。重金属的空间分布差异显著,这与研究区的环境和气象条件密切相关。
中图分类号:
张军, 高煜, 王国兰, 金梓函, 杨明航. 典型河谷城市土壤重金属含量空间分异及其影响因素[J]. 生态环境学报, 2021, 30(6): 1276-1285.
ZHANG Jun, GAO Yu, WANG Guolan, JING Zihan, YANG Minghang. Spatial Differentiation and Influencing Factors of Heavy Metal Content in Soils of Typical River Valley City[J]. Ecology and Environment, 2021, 30(6): 1276-1285.
交互作用 Interaction | 解释力 Explanation |
---|---|
非线性减弱 Nonlinear reduction | PD, H (x∩y)<Min[PD, H (x) PD, H (y)] |
单因子减弱 Single factor reduction | Min[PD, H (x) PD, H (y)]<PD, H (x∩y)<Max[PD, H (x) PD, H (y)] |
相互独立 Independent | PD, H (x∩y)=PD, H (x)+PD, H (y) |
双因子增强 Double factor enhancement | PD, H (x∩y)>Max[PD, H (x) PD, H (y)] |
非线性增强 Non-linear enhancement | PD, H (x∩y)>PD, H (x)+PD, H (y) |
表1 交互作用结果划分
Table 1 Interaction result partitioning
交互作用 Interaction | 解释力 Explanation |
---|---|
非线性减弱 Nonlinear reduction | PD, H (x∩y)<Min[PD, H (x) PD, H (y)] |
单因子减弱 Single factor reduction | Min[PD, H (x) PD, H (y)]<PD, H (x∩y)<Max[PD, H (x) PD, H (y)] |
相互独立 Independent | PD, H (x∩y)=PD, H (x)+PD, H (y) |
双因子增强 Double factor enhancement | PD, H (x∩y)>Max[PD, H (x) PD, H (y)] |
非线性增强 Non-linear enhancement | PD, H (x∩y)>PD, H (x)+PD, H (y) |
元素 Element | Cd | Zn | As | Cu | Ni | Pb | Cr | Mn | |
---|---|---|---|---|---|---|---|---|---|
均值 Mean value/(mg∙kg-1) | 0.77 | 261.17 | 17.03 | 40.52 | 30.52 | 16.75 | 49.18 | 331.23 | |
最小值 Minimum value/(mg∙kg-1) | 0.14 | 22.9 | 2.9 | 4.7 | 6.73 | 未检出 No detection | 8.4 | 未检出 No detection | |
最大值 Maximum value/(mg∙kg-1) | 5.5 | 1882 | 67.93 | 214 | 198 | 49.2 | 249 | 614 | |
变异系数 Coefficient of variation | 1.34 | 1.14 | 1.08 | 1.18 | 0.82 | 0.67 | 0.72 | 0.65 | |
陕西省土壤背景值 Soil background values in Shaanxi Province/(mg∙kg-1) | 0.094 | 69.4 | 11.2 | 21.4 | 28.8 | 21.4 | 62.5 | 557 | |
与陕西省土壤背景值比值 Ratio of soil background value to Shaanxi Province | 8.19 | 3.76 | 1.52 | 1.89 | 1.05 | 0.78 | 0.78 | 0.59 |
表2 土壤重金属描述统计
Table 2 Descriptive statistics of soil heavy metal
元素 Element | Cd | Zn | As | Cu | Ni | Pb | Cr | Mn | |
---|---|---|---|---|---|---|---|---|---|
均值 Mean value/(mg∙kg-1) | 0.77 | 261.17 | 17.03 | 40.52 | 30.52 | 16.75 | 49.18 | 331.23 | |
最小值 Minimum value/(mg∙kg-1) | 0.14 | 22.9 | 2.9 | 4.7 | 6.73 | 未检出 No detection | 8.4 | 未检出 No detection | |
最大值 Maximum value/(mg∙kg-1) | 5.5 | 1882 | 67.93 | 214 | 198 | 49.2 | 249 | 614 | |
变异系数 Coefficient of variation | 1.34 | 1.14 | 1.08 | 1.18 | 0.82 | 0.67 | 0.72 | 0.65 | |
陕西省土壤背景值 Soil background values in Shaanxi Province/(mg∙kg-1) | 0.094 | 69.4 | 11.2 | 21.4 | 28.8 | 21.4 | 62.5 | 557 | |
与陕西省土壤背景值比值 Ratio of soil background value to Shaanxi Province | 8.19 | 3.76 | 1.52 | 1.89 | 1.05 | 0.78 | 0.78 | 0.59 |
元素 Element | 因子Factor | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
DEM | NDVI | 降水Precipitation | 大气温度Atmospheric temperature | 土地利用Land use type | 土壤类型Soil type | 土壤质地 Soil texture | 距公路距离Distance from road | 距河流距离Distance from river | 距工厂距离Distance from factory | 距铁路距离Distance from railway | ||
Cd | 0.141 | 0.058 | 0.188 | 0.187 | 0.005 | 0.159 | 0.021 | 0.006 | 0.001 | 0.039 | 0.016 | |
Zn | 0.203 | 0.007 | 0.009 | 0.01 | 0.077 | 0.029 | 0.003 | 0.005 | 0.006 | 0.017 | 0.002 | |
As | 0.355 | 0.066 | 0.093 | 0.093 | 0.092 | 0.133 | 0.009 | 0.001 | 0.001 | 0.042 | 0.024 | |
Cu | 0.082 | 0.047 | 0.012 | 0.011 | 0.036 | 0.04 | 0.002 | 0.013 | 0.021 | 0.045 | 0.003 | |
Ni | 0.279 | 0.015 | 0.054 | 0.054 | 0.076 | 0.032 | 0.006 | 0.001 | 0.001 | 0.000 | 0.007 | |
Pb | 0.142 | 0.001 | 0.01 | 0.01 | 0.01 | 0.039 | 0.009 | 0.001 | 0.001 | 0.001 | 0.003 | |
Cr | 0.095 | 0.054 | 0.037 | 0.036 | 0.052 | 0.025 | 0.003 | 0.007 | 0.019 | 0.053 | 0.004 | |
Mn | 0.305 | 0.091 | 0.204 | 0.204 | 0.068 | 0.066 | 0.012 | 0.001 | 0.007 | 0.044 | 0.033 |
表3 影响因子探测值(PD, H)
Table 3 Detection (PD, H) of geographical environment factor
元素 Element | 因子Factor | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
DEM | NDVI | 降水Precipitation | 大气温度Atmospheric temperature | 土地利用Land use type | 土壤类型Soil type | 土壤质地 Soil texture | 距公路距离Distance from road | 距河流距离Distance from river | 距工厂距离Distance from factory | 距铁路距离Distance from railway | ||
Cd | 0.141 | 0.058 | 0.188 | 0.187 | 0.005 | 0.159 | 0.021 | 0.006 | 0.001 | 0.039 | 0.016 | |
Zn | 0.203 | 0.007 | 0.009 | 0.01 | 0.077 | 0.029 | 0.003 | 0.005 | 0.006 | 0.017 | 0.002 | |
As | 0.355 | 0.066 | 0.093 | 0.093 | 0.092 | 0.133 | 0.009 | 0.001 | 0.001 | 0.042 | 0.024 | |
Cu | 0.082 | 0.047 | 0.012 | 0.011 | 0.036 | 0.04 | 0.002 | 0.013 | 0.021 | 0.045 | 0.003 | |
Ni | 0.279 | 0.015 | 0.054 | 0.054 | 0.076 | 0.032 | 0.006 | 0.001 | 0.001 | 0.000 | 0.007 | |
Pb | 0.142 | 0.001 | 0.01 | 0.01 | 0.01 | 0.039 | 0.009 | 0.001 | 0.001 | 0.001 | 0.003 | |
Cr | 0.095 | 0.054 | 0.037 | 0.036 | 0.052 | 0.025 | 0.003 | 0.007 | 0.019 | 0.053 | 0.004 | |
Mn | 0.305 | 0.091 | 0.204 | 0.204 | 0.068 | 0.066 | 0.012 | 0.001 | 0.007 | 0.044 | 0.033 |
交互探测 Interaction Detection | Cd | Zn | As | Cu | Ni | Pb | Cr | Mn |
---|---|---|---|---|---|---|---|---|
第一主因子 First principal factor | 降水 Precipitation | DEM | DEM | DEM | DEM | DEM | DEM | DEM |
PD, H | 0.188 | 0.203 | 0.355 | 0.082 | 0.279 | 0.142 | 0.095 | 0.305 |
交互作用1 Interaction Function 1 | 降水∩土壤类型Precipitation ∩ Soil type | DEM ∩大气温度 DEM ∩ Atmospheric temperature | DEM ∩降水 DEM ∩ Precipitation | DEM ∩降水 DEM ∩ Precipitation | DEM ∩ 土地利用 DEM ∩ Land use type | DEM ∩ 土壤类型 DEM ∩ Soil type | DEM ∩降水 DEM ∩ Precipitation | DEM ∩降水 DEM ∩ Precipitation |
PD, H | 0.307 | 0.298 | 0.441 | 0.251 | 0.331 | 0.227 | 0.244 | 0.424 |
交互作用2 Interaction Function 2 | 降水∩土壤质地Precipitation ∩ Soil texture | DEM ∩降水 DEM ∩ Precipitation | DEM ∩ 大气温度 DEM ∩ Atmospheric temperature | DEM ∩ 大气温度 DEM ∩ Atmospheric temperature | DEM ∩ 大气温度 DEM ∩ Atmospheric temperature | DEM ∩降水 DEM ∩ Precipitation | DEM ∩ 大气温度 DEM ∩ Atmospheric temperature | DEM ∩ 大气温度 DEM ∩ Atmospheric temperature |
PD, H | 0.251 | 0.298 | 0.439 | 0.251 | 0.324 | 0.213 | 0.243 | 0.422 |
交互作用3 Interaction Function 3 | 降水∩ 土地利用Precipitation ∩ Land use type | DEM ∩ NDVI | DEM ∩ 土壤类型 DEM ∩ Soil type | DEM ∩ 土壤类型 DEM ∩ Soil type | DEM ∩降水 DEM ∩ Atmospheric temperature | DEM ∩大气温度 DEM ∩ Atmospheric temperature | DEM ∩ 土壤类型 DEM ∩ Soil type | DEM ∩ 土壤类型 DEM ∩ Soil type |
PD, H | 0.222 | 0.273 | 0.417 | 0.201 | 0.331 | 0.213 | 0.184 | 0.363 |
表4 因子交互作用
Table 4 Factor interaction
交互探测 Interaction Detection | Cd | Zn | As | Cu | Ni | Pb | Cr | Mn |
---|---|---|---|---|---|---|---|---|
第一主因子 First principal factor | 降水 Precipitation | DEM | DEM | DEM | DEM | DEM | DEM | DEM |
PD, H | 0.188 | 0.203 | 0.355 | 0.082 | 0.279 | 0.142 | 0.095 | 0.305 |
交互作用1 Interaction Function 1 | 降水∩土壤类型Precipitation ∩ Soil type | DEM ∩大气温度 DEM ∩ Atmospheric temperature | DEM ∩降水 DEM ∩ Precipitation | DEM ∩降水 DEM ∩ Precipitation | DEM ∩ 土地利用 DEM ∩ Land use type | DEM ∩ 土壤类型 DEM ∩ Soil type | DEM ∩降水 DEM ∩ Precipitation | DEM ∩降水 DEM ∩ Precipitation |
PD, H | 0.307 | 0.298 | 0.441 | 0.251 | 0.331 | 0.227 | 0.244 | 0.424 |
交互作用2 Interaction Function 2 | 降水∩土壤质地Precipitation ∩ Soil texture | DEM ∩降水 DEM ∩ Precipitation | DEM ∩ 大气温度 DEM ∩ Atmospheric temperature | DEM ∩ 大气温度 DEM ∩ Atmospheric temperature | DEM ∩ 大气温度 DEM ∩ Atmospheric temperature | DEM ∩降水 DEM ∩ Precipitation | DEM ∩ 大气温度 DEM ∩ Atmospheric temperature | DEM ∩ 大气温度 DEM ∩ Atmospheric temperature |
PD, H | 0.251 | 0.298 | 0.439 | 0.251 | 0.324 | 0.213 | 0.243 | 0.422 |
交互作用3 Interaction Function 3 | 降水∩ 土地利用Precipitation ∩ Land use type | DEM ∩ NDVI | DEM ∩ 土壤类型 DEM ∩ Soil type | DEM ∩ 土壤类型 DEM ∩ Soil type | DEM ∩降水 DEM ∩ Atmospheric temperature | DEM ∩大气温度 DEM ∩ Atmospheric temperature | DEM ∩ 土壤类型 DEM ∩ Soil type | DEM ∩ 土壤类型 DEM ∩ Soil type |
PD, H | 0.222 | 0.273 | 0.417 | 0.201 | 0.331 | 0.213 | 0.184 | 0.363 |
图4 重金属Cd含量风险探测 Ⅰ、Ⅱ、Ⅲ、Ⅳ、Ⅴ、Ⅵ为分类种类。DEM、NDVI、土壤类型、土壤质地为六类,其余影响因子均为五类,下同
Fig. 4 Risk detection of Cd content I, II, III, IV, V, VI are classified. DEM, NDVI, soil type, soil texture are six categories, the other factors are five categories, the same below
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