Liangliang Dai, Wenbing Ji, Wenbin Wu, Kai Chen, Hao Gong, Jun Zhang, Xiangrong Hu, Zhongfang Yang
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引用次数: 0
Abstract
The factors influencing the uptake of soil Cd by crops are complex and closely related to the different crop varieties. Efficient and safe utilization of land resources with high soil Cd levels has become a significant challenge in the scientific community. This study focuses on the anomalously high Cd distribution area in the northern part of Longshan County, Hunan, China. By systematically collecting and testing Cd content in the edible parts of lily and maize, as well as corresponding root soil Cd, pH, and oxides, the study reveals the differences in the bioconcentration factors of Cd (BCF-Cd) for lily and maize and their influencing factors. Using the random forest method and hyperparameter optimization, optimal prediction models for BCF-Cd in lily and maize were established. The results indicate that the BCF-Cd of lily is significantly higher than that of maize. The primary factors influencing BCF-Cd in lily and maize include soil pH, Mn, OM, and ba. Feature importance analysis identifies pH as the most critical factor affecting BCF-Cd in both lily and maize. Based on the prediction results of the random forest model, this study proposes a zoning scheme for the safe utilization of arable land to maximize benefits while ensuring the medicinal safety of lily and the food safety of maize. This provides scientific evidence for ensuring food security and maximizing the productive value of land resources.
期刊介绍：
Environmental Geochemistry and Health publishes original research papers and review papers across the broad field of environmental geochemistry. Environmental geochemistry and health establishes and explains links between the natural or disturbed chemical composition of the earth’s surface and the health of plants, animals and people.
Beneficial elements regulate or promote enzymatic and hormonal activity whereas other elements may be toxic. Bedrock geochemistry controls the composition of soil and hence that of water and vegetation. Environmental issues, such as pollution, arising from the extraction and use of mineral resources, are discussed. The effects of contaminants introduced into the earth’s geochemical systems are examined. Geochemical surveys of soil, water and plants show how major and trace elements are distributed geographically. Associated epidemiological studies reveal the possibility of causal links between the natural or disturbed geochemical environment and disease. Experimental research illuminates the nature or consequences of natural or disturbed geochemical processes.
The journal particularly welcomes novel research linking environmental geochemistry and health issues on such topics as: heavy metals (including mercury), persistent organic pollutants (POPs), and mixed chemicals emitted through human activities, such as uncontrolled recycling of electronic-waste; waste recycling; surface-atmospheric interaction processes (natural and anthropogenic emissions, vertical transport, deposition, and physical-chemical interaction) of gases and aerosols; phytoremediation/restoration of contaminated sites; food contamination and safety; environmental effects of medicines; effects and toxicity of mixed pollutants; speciation of heavy metals/metalloids; effects of mining; disturbed geochemistry from human behavior, natural or man-made hazards; particle and nanoparticle toxicology; risk and the vulnerability of populations, etc.
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