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| Analysis on characteristics of heavy metals content in farmland soils and crops around recycled aluminum enterprises |
| Received:August 15, 2019 |
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| KeyWord:recycled aluminum enterprise;soil;crops;heavy metals |
| Author Name | Affiliation | E-mail | | FENG Yi-tao | Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
Key Laboratory of Land Surface Pattern and Simulation, Beijing 100101, China
University of Chinese Academy of Sciences, Beijing 100049, China | | | YAN Xiu-lan | Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
Key Laboratory of Land Surface Pattern and Simulation, Beijing 100101, China | yanxl@igsnrr.ac.cn | | TONG Xue-jiao | Yuhuan Environmental Technology Co. Ltd, Shijiazhuang 050000, China | | | LI Ming-feng | Wuhan University of Bioengineering, Wuhan 430070, China | | | LIANG Tian-hao | The High School Affiliated to Renmin University of China, Beijing 100030, China | |
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| Abstract: |
| To explore the pollution status of agricultural soils and crops around a recycled aluminum enterprise group, the concentration of seven heavy metal elements in the soils and crops around such an enterprise were analyzed through sampling and laboratory tests. Furthermore, the spatial distribution characteristics of soil heavy metals were studied by spatial interpolation. The results showed that the concentration of Cd in the soil of the study area was relatively high and the concentration ranged from 0.11 to 1.86 mg·kg-1. The average concentration of Cd was higher than the screening value of soil pollution risk in China. The average concentrations of Cu, Cr, Zn, Pb, Cd, Ni, and As were 1.9, 1.1, 1.4, 1.5, 4.1, 0.91, and 0.39 times of the background values of Hebei Province, respectively; the Cd concentration presented a strong ecological risk. From the distribution characteristics, the Cd, Pb, Cu, and Zn in the soil gradually decreased from the enterprise to the periphery and the distribution range is wider than the other metals. Moreover, Cu, Zn, Cd, Cr, and Pb in wheat grains were higher than the standard values. The Pb concentration was relatively high and the concentration range was 0.02 to 1.06 mg·kg-1. Compared with the National Food Safety Standards, the maximum concentration of Pb was 5.3 times of the standard value; the high concentration samples were distributed in the northern part of the study area. In corn kernels, the concentrations of Cr, Zn, and Ni were also higher than the standard values. The Cr concentration was higher than other heavy metals, ranging from 0.16 to 1.32 mg·kg-1. The research results showed that the activities of recycled aluminum enterprises have caused a variety of heavy metals pollution in the surrounding agricultural soils and crops. This situation needs to be taken seriously considering the effects of this pollution. |
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