广西农田土壤重金属空间分布特征及污染评价
1. 广西博世科环保科技股份有限公司, 广西南宁 530007
2. 广西大学, 林学院, 广西南宁 530225
3. 桂林理工大学南宁分校, 广西崇左 532100
4. 南宁园博园旅游开发有限责任公司, 广西南宁 530299
| 摘 要： | 农田土壤是农业发展的重要资源，对重金属的空间分布和污染水平进行宏观上的分析，可为未来农田污染治理提供科学的依据。基于2014年来广西农田土壤重金属实测数据，探讨了农田土壤Pb、As、Cd、Cr、Zn和Cu共6种重金属的空间分布特征，并采用地累积指数法对污染状况展开评价。结果表明广西农田土壤Pb、As、Cd、Cr、Zn、Cu的平均值均高于广西农田土壤背景值，其中Pb、As、Cd、Zn元素的平均含量均超过土壤环境质量标准（GB15618-2018），Cr和Cu未超过该标准；广西农田土壤重金属的空间分布特征差异较为明显，总体上中北部地区土壤重金属含量高于南部地区；地累积指数大小依次为：Zn＞Pb＞Cd＞As＞Cu＞Cr，其中农田土壤As、Cu、Cr的平均Igeo值均小于0，而受当地采矿活动影响，土壤Zn、Pb、Cd的平均Igeo值较高。 |
| 关 键 词： | 广西; 农田土壤; 重金属; 空间分布; 污染评价; 地质累积指数 |
| DOI： | 10.57237/j.wjese.2023.01.003 |
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收稿日期: 2022-11-23
接受日期: 2022-12-29
在线出版日期: 2023-02-03
Spatial Distribution Pattern and Pollution Evaluation of Heavy Metals in Farmland Soil in Guangxi
1. Guangxi Bossco Environmental Protection Technology Co., Ltd., Nanning 530007, China
2. College of Forestry, Guangxi University, Nanning 530225, China
3. Guilin University of Technology at Nanning, Chongzuo 532100, China
4. Nanning Yuanboyuan Tourism Development Co., Ltd., Nanning 530299, China
| Abstract: | Farmland soil is an indispensable natural resource in agricultural production. A macro analysis of the spatial distribution and pollution level of heavy metals can provide a scientific basis for future farmland pollution control. Based on the measured data of heavy metals in farmland soil in Guangxi since 2014, the spatial distribution characteristics of 6 heavy metals in farmland soil, namely Pb, As, Cd, Cr, Zn and Cu, were discussed, and the pollution status was evaluated using the geo accumulation index method. The results showed that the average values of Pb, As, Cd, Cr, Zn, Cu in farmland soil were higher than the background values of farmland soil in Guangxi. The average contents of Pb, As, Cd, Zn in farmland soil exceeded the soil environmental quality standard (GB15618-2018), and Cr and Cu did not exceed the standard; The spatial distribution characteristics of heavy metals in farmland soils in Guangxi are obviously different. Generally, the content of heavy metals in the middle and north regions is higher than that in the south regions; The land accumulation index is in the order of Zn>Pb>Cd>As>Cu>Cr, in which the average Igeo values of As, Cu and Cr in farmland soil are all less than 0, while affected by local mining activities, the average Igeo values of Zn, Pb and Cd in soil are higher. |
| Keywords: | Guangxi; Farmland Soil; Heavy Metals; Spatial Distribution; Pollution Evaluation; Geo-accumulation Index |
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