Cr and Ni geochemistry and some suggestions on soil pollution risk prevention control in the Zhelong-Gasa area, Yunnan Province
WU Song1,2(), CHEN Zheng1, LI Yuan-Bin1, HUANG Zhao1,2,3(), ZHANG Lin1, XU Sheng-Chao1, WANG Kai-Gui1
1. Yunnan Institute of Geological Survey, Kunming 650216, China 2. Key of Laboratory of Sanjiang Metallogeny and Resourses Exploration and Utilization,MRN,Kunming 650051,China 3. College of Territory and Resources Engineering, Kunming University of Science and Technology, Kunming 650093,China
Based on the land quality geochemical survey data obtained in the Zhelong-Gasa area, Yunnan Province, the authors studied geochemical characteristics and main influencing factors of Cr and Ni in surface soil and analyzed Cr and Ni content characteristics of agricultural products. The results show that the content of Cr and Ni in the surface soil is mainly controlled by the geological background. The content of Cr and Ni in the soil developed in the Guangshan-Pingyakou rock mass (σ) of the study area is significantly higher than that in other strata. The medium values of Cr and Ni in different types of soils are quite different, and land use also affects the content of Cr and Ni in the soil. The Cr and Ni values of agricultural products such as corn, citrus, tea, sugarcane, bananas, and walnuts in the study area do not exceed the food safety standards. Only the values of 11 rice Cr samples exceed the Cr content standards set by national standards,accounting for 11.3% of the total rice samples. The overall evaluation of agricultural products in this area shows safety. The area of agricultural land such as paddy field, dry land, garden land and grassland in this area is 554.73 km2, of which, the area of safety area is 408.61 km2, accounting for 73.66%, the area of risk area is 112.96 km2, accounting for 20.36%, and the area of control area is 33.16 km2, accounting for 5.98%.For some areas with soil Cr and Ni pollution risk, measures are proposed such as soil and water conservation, fertilization adjustment, and water-dry rotation to prevent and control pollution risks.
吴松, 陈政, 李元彬, 黄钊, 张林, 许胜超, 王开贵. 云南省者竜—嘎洒地区Cr、Ni地球化学特征及土壤污染风险防控建议[J]. 物探与化探, 2021, 45(2): 517-527.
WU Song, CHEN Zheng, LI Yuan-Bin, HUANG Zhao, ZHANG Lin, XU Sheng-Chao, WANG Kai-Gui. Cr and Ni geochemistry and some suggestions on soil pollution risk prevention control in the Zhelong-Gasa area, Yunnan Province. Geophysical and Geochemical Exploration, 2021, 45(2): 517-527.
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