| Citation: | Xumei Mao, Yuwei Shao. Source Identification and Accumulation Prediction of Cu in Soils from Northwest China over the Past 30 Years. Journal of Earth Science, 2026, 37(4): 1768-1776. doi: 10.1007/s12583-024-0022-3
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The source and enrichment process of Cu in soil are important for soil environmental pollution monitoring, evaluation, and prediction. The Cu content change curve can reflect the change trend and can be used for early warning and prediction. However, the historical change of Cu content in soil is rarely described by a functional curve due to the lack of long-term observational data. In addition to the soil geochemical background providing soil Cu and the weak accumulation of Cu in soil caused by weathering deposition, industrialization and urbanization in human activities are considered to be the main contribution to accelerating the accumulation of Cu in soil in recent years. According to the historical data of Cu content in soil, the historical change curve of copper content in soil in Northwest China was established based on equation fitting. The results indicate that the Cu content affected by human activities is closely related to the total primary energy production (10 000 tons of SCE). The study area in Northwest China satisfies the Allometric1 model. The average annual weathering deposition in the study area from 1990 to 2020 is about 0.004 87 mg/kg Cu. Based on the total primary energy production (10 000 tons of SCE), the future Cu content in soil in the study area can be predicted by Allometric1 model. This model can provide reference for Cu accumulation control and pollution policy in soil.
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