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物探与化探  2020, Vol. 44 Issue (4): 820-829    DOI: 10.11720/wtyht.2020.1178
  生态环境调查 本期目录 | 过刊浏览 | 高级检索 |
广西中东部9县区农田土壤Se输入通量研究
陈雪1,2(), 杨忠芳1(), 陈岳龙1, 杨琼1, 王磊3,4, 韦雪姬4,5
1.中国地质大学(北京) 地球科学与资源学院,北京 100083
2.中国人民武装警察部队 黄金地质研究所,河北 廊坊 065000
3.广西壮族自治区第四地质队,广西 南宁 530031
4.广西土地质量地球化学评价办公室,广西 南宁 530023
5.广西地球物理勘察院,广西 柳州 545005
Selenium input flux in farmland soil of 9 counties in the middle east of Guangxi
Xue CHEN1,2(), Zhong-Fang YANG1(), Yue-Long CHEN1, Qiong YANG1, Lei WANG3,4, Xue-Ji WEI4,5
1. China University of Geosciences(Beijing),Beijing 100083,China
2. Gold Geological Institute of CAPF,Langfang 065000,China
3. No. 4 Geological Party of Guangxi Zhuang Autonomic Region,Nangning 530031,China
4. Project Office of Land Quality Geochemical Assessment of Guangxi,Nanning 530023,China
5. Guangxi Geophysical Investigation Institute,Liuzhou 545005,China
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摘要 

对广西中东部9县区农田土壤中Se的输入通量进行了初步研究,确定大气干湿沉降是Se的主要输入途径。研究区大气干湿沉降通量平均值为6.36 g/(hm2·a),灌溉水输入通量次之,施肥输入通量明显较低,三者对土壤Se输入的贡献率分别为70.93%、27.35%和1.72%,其中不同县区三者比例略有不同,但大气干湿沉降贡献比例大部分在50% 以上。因此,大气干湿沉降是研究区Se的主要输入途径。研究区Se输入通量与进入农田土壤的As、Cd、Cr6+、Hg、Pb 5种重金属元素总量在各地区间的差异以及三种输入途径所占比例方面表现基本一致,说明外源输入在带入有益元素Se的同时也带入了一定量的重金属元素,因此要严格预防和控制外源输入造成的土壤重金属污染。

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陈雪
杨忠芳
陈岳龙
杨琼
王磊
韦雪姬
关键词 输入通量Se重金属污染农田土壤广西    
Abstract

The input flux of Se in farmland soil of 9 counties in the middle east of Guangxi were studied. By integrating various factors, the authors took the atmospheric wet and dry depositions as the main input way of Se. The average atmospheric wet and dry deposition flux in the whole study area is 6.36 g/(hm2·a), the irrigation water input flux possesses the second position, whereas the fertilization input flux is obviously lower. They account for 70.93%,27.35% and 1.72% of Se in soil respectively. Their proportions are somewhat different among 9 counties of the study area: the contribution of the atmospheric wet and dry deposition is the highest, accounting for more than 50%. Therefore, the atmospheric wet and dry depositions seem to be the main input ways of Se in the study area. The regional differences of Se input flux and the proportion of different input routes in the study area are basically consistent with the total amount of As, Cd, Cr6+, Hg and Pb in the field soils. These data show that the inputs bring in not only the beneficial element Se but also a certain amount of heavy metals. Therefore, the pollution of heavy metals in soil caused by the inputs should be strictly prevented and controlled.

Key wordsinput flux    Se    heavy metal pollution    farmland soil    Guangxi
收稿日期: 2019-03-29      出版日期: 2020-08-28
:  P632  
基金资助:广西壮族自治区国土资源厅项目“广西中东部地区土壤硒元素和重金属元素地球化学研究”(桂国土资发[2015]44号)
通讯作者: 杨忠芳
作者简介: 陈雪(1985-),女,博士研究生,工程师,地球化学专业,主要从事环境地球化学研究。Email:377850218@qq.com
引用本文:   
陈雪, 杨忠芳, 陈岳龙, 杨琼, 王磊, 韦雪姬. 广西中东部9县区农田土壤Se输入通量研究[J]. 物探与化探, 2020, 44(4): 820-829.
Xue CHEN, Zhong-Fang YANG, Yue-Long CHEN, Qiong YANG, Lei WANG, Xue-Ji WEI. Selenium input flux in farmland soil of 9 counties in the middle east of Guangxi. Geophysical and Geochemical Exploration, 2020, 44(4): 820-829.
链接本文:  
https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2020.1178      或      https://www.wutanyuhuatan.com/CN/Y2020/V44/I4/820
Fig.1  广西中东部地区3种外源的采样点位分布
项目 Cd Pb As Hg Se Cr
灌溉水(南宁) 0.06* 0.07* 0.4* 0.05* 0.2* 0.004**
湿沉降(南宁) 0.06* 0.07* 0.4* 0.05* 0.2* 0.004**
干沉降(南宁) 0.02 0.4 0.2 0.0002 0.004 0.4
化肥(南宁) 0.02 0.4 0.2 0.0002 0.004 0.4
化肥(南京) 0.02 2 0.8 0.02 0.01 3
化肥(武汉) 0.02 0.1 0.05 0.0005 0.01 0.4
化肥(合肥) 0.02 1 0.2 0.0005 0.01 1
化肥(福建) 0.03 0.01 0.05 0.0005 0.01 0.01
测试方法 ICP-MS ICP-MS AFS AFS AFS COL、ICP-MS、
ICP-AES
Table 1  样品各元素分析方法及检出限
地区 输入途径 As Cd Cr6+ Hg Pb Se
大气干湿沉降 7.9 1.4 126 2.6 37 3.2
北流市 施肥 11 0.03 3.5 0.01 1.3 0.04
灌溉水 0.017 0.000 0.024 0.000 0.008 0.007
大气干湿沉降 7.5 1.1 111 2.1 30 3.1
博白县 施肥 5.4 0.28 7.2 0.04 2.2 0.07
灌溉水 0.024 0.000 0.024 0.000 0.003 0.005
大气干湿沉降 7.5 1.3 112 1.0 33 2.8
兴业县 施肥 13 0.31 5.9 0.10 57 0.50
灌溉水 0.020 0.001 0.024 0.001 0.007 0.002
大气干湿沉降 11 1.7 72 1.6 62 3.0
港南区 施肥 21 0.22 16 0.05 4.3 0.25
灌溉水 0.025 0.000 0.024 0.000 0.001 0.001
大气干湿沉降 6.7 1.3 77 1.9 72 5.6
平南县 施肥 5.5 0.12 6.2 0.02 1.3 0.05
灌溉水 0.019 0.000 0.012 0.000 0.005 0.001
大气干湿沉降 13 4.0 123 4.2 87 15
鹿寨县 施肥 6.2 0.18 19 0.02 2.4 0.11
灌溉水 0.008 0.000 0.024 0.000 0.002 0.002
大气干湿沉降 14 4.3 123 5.1 162 15
临桂区 施肥 8.6 0.10 8.6 0.10 3.0 0.22
灌溉水 0.006 0.000 0.024 0.000 0.001 0.001
大气干湿沉降 5.8 21 58 2.9 90 2.5
象州县 施肥 3.3 0.10 8.9 0.01 0.95 0.08
灌溉水 0.017 0.000 0.024 0.001 0.001 0.002
大气干湿沉降 13 4.8 114 3.4 97 6.8
兴宾区 施肥 3.6 0.11 7.7 0.03 1.8 0.07
灌溉水 0.008 0.000 0.024 0.001 0.001 0.002
Table 2  研究区Se及重金属元素3外源输入通量g/(hm2·a)
Fig.2  广西中东部9县区农田土壤Se及重金属大气干湿沉降平均输入通量
Fig.3  广西中东部9县区农田土壤Se及重金属灌溉水平均输入通量
肥料种类 样品数 Se As Cd Cr6+ Hg Pb
复合肥 125 0.13 16.03 0.46 13.43 0.07 3.90
氮肥 35 0.02 5.23 0.02 1.95 0.01 0.60
磷肥 10 1.59 88.83 1.06 111.13 0.51 151.24
钾肥 26 0.04 0.80 0.01 1.41 0.01 0.75
有机肥 12 0.67 5.42 0.60 19.21 0.14 9.87
Table 3  广西中东部9县区肥料中Se及重金属元素含量平均值10-6
Fig.4  广西中东部9县区农田土壤Se及重金属施肥平均输入通量
Fig.5  广西中东部9县区农田土壤Se及重金属平均输入通量
Fig.6  广西中东部9县区农田土壤Se的3外源输入通量比例关系
Fig.7  Se及重金属元素3外源输入通量比例关系
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