Ren-Zhi Xu, Zi-Han Zhou, Chen-Run Wu, Yan-Ling Huang, Bo Song
{"title":"基于贝叶斯最大熵理论的贵州乌江流域耕地土壤潜在有毒元素污染评价及危险区划定[j]。","authors":"Ren-Zhi Xu, Zi-Han Zhou, Chen-Run Wu, Yan-Ling Huang, Bo Song","doi":"10.13227/j.hjkx.202407215","DOIUrl":null,"url":null,"abstract":"<p><p>The assessment of the extent of contamination of potentially toxic elements （PTE） in arable soils and the delineation of high-risk zones are crucial steps in the development of effective prevention and control strategies. A large-scale investigation of soil PTE contents in farmland （cornfields and rice fields） in the Wujiang River Basin, Guizhou Province was conducted to explore the contamination degrees and risk area distribution through the influence index of the comprehensive quality of soil （IICQs） and Bayesian maximum entropy （BME） theory. The results showed that the concentrations of As, Cd, and Cu in corn soil and the concentrations of Cd, Hg, and Cu in paddy soil exceeded the risk screening values in 29.93%, 47.32%, 19.9%, 25.65%, 65.5%, and 16.34% of the samples, respectively. The concentration of PTE in soil exhibited a strong/moderate variation. The assessment of IICQs demonstrated that approximately 74.85% of the samples exhibited varying degrees of exceedance, with 33.42% of the polluted samples originating from Bijie City. Overall, the IICQs showed a clear downward trend from west to east along the flow direction of the Wujiang River Basin. According to BME theory, the area of PTE contamination risk area was 68.63% of the study area. Among them, 2.95%, 4.23%, and 8.32% of the risk area were at 95%, 90%, and 75% confidence levels, respectively. These areas were distributed in Hezhang County, Zhijin County, and Qianxi County of Bijie City and a small part of southern Zunyi City and central Guiyang City. The primary factors influencing the concentration of PTE in agricultural soil were the activities associated with metal mining and smelting. The results of the study provide a reasonable classification system and suggestions for the prevention and control of PTE pollution in farmland soils in the Wujiang River Basin of Guizhou Province.</p>","PeriodicalId":35937,"journal":{"name":"环境科学","volume":"46 8","pages":"5249-5259"},"PeriodicalIF":0.0000,"publicationDate":"2025-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"[Pollution Assessment and Risk Area Delineation of Potential Toxic Elements in Cultivated Soils in Wujiang River Watershed of Guizhou Province Based on Bayesian Maximum Entropy Theory].\",\"authors\":\"Ren-Zhi Xu, Zi-Han Zhou, Chen-Run Wu, Yan-Ling Huang, Bo Song\",\"doi\":\"10.13227/j.hjkx.202407215\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>The assessment of the extent of contamination of potentially toxic elements （PTE） in arable soils and the delineation of high-risk zones are crucial steps in the development of effective prevention and control strategies. A large-scale investigation of soil PTE contents in farmland （cornfields and rice fields） in the Wujiang River Basin, Guizhou Province was conducted to explore the contamination degrees and risk area distribution through the influence index of the comprehensive quality of soil （IICQs） and Bayesian maximum entropy （BME） theory. The results showed that the concentrations of As, Cd, and Cu in corn soil and the concentrations of Cd, Hg, and Cu in paddy soil exceeded the risk screening values in 29.93%, 47.32%, 19.9%, 25.65%, 65.5%, and 16.34% of the samples, respectively. The concentration of PTE in soil exhibited a strong/moderate variation. The assessment of IICQs demonstrated that approximately 74.85% of the samples exhibited varying degrees of exceedance, with 33.42% of the polluted samples originating from Bijie City. Overall, the IICQs showed a clear downward trend from west to east along the flow direction of the Wujiang River Basin. According to BME theory, the area of PTE contamination risk area was 68.63% of the study area. Among them, 2.95%, 4.23%, and 8.32% of the risk area were at 95%, 90%, and 75% confidence levels, respectively. These areas were distributed in Hezhang County, Zhijin County, and Qianxi County of Bijie City and a small part of southern Zunyi City and central Guiyang City. The primary factors influencing the concentration of PTE in agricultural soil were the activities associated with metal mining and smelting. The results of the study provide a reasonable classification system and suggestions for the prevention and control of PTE pollution in farmland soils in the Wujiang River Basin of Guizhou Province.</p>\",\"PeriodicalId\":35937,\"journal\":{\"name\":\"环境科学\",\"volume\":\"46 8\",\"pages\":\"5249-5259\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2025-08-08\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"环境科学\",\"FirstCategoryId\":\"1087\",\"ListUrlMain\":\"https://doi.org/10.13227/j.hjkx.202407215\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"Environmental Science\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"环境科学","FirstCategoryId":"1087","ListUrlMain":"https://doi.org/10.13227/j.hjkx.202407215","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"Environmental Science","Score":null,"Total":0}
[Pollution Assessment and Risk Area Delineation of Potential Toxic Elements in Cultivated Soils in Wujiang River Watershed of Guizhou Province Based on Bayesian Maximum Entropy Theory].
The assessment of the extent of contamination of potentially toxic elements （PTE） in arable soils and the delineation of high-risk zones are crucial steps in the development of effective prevention and control strategies. A large-scale investigation of soil PTE contents in farmland （cornfields and rice fields） in the Wujiang River Basin, Guizhou Province was conducted to explore the contamination degrees and risk area distribution through the influence index of the comprehensive quality of soil （IICQs） and Bayesian maximum entropy （BME） theory. The results showed that the concentrations of As, Cd, and Cu in corn soil and the concentrations of Cd, Hg, and Cu in paddy soil exceeded the risk screening values in 29.93%, 47.32%, 19.9%, 25.65%, 65.5%, and 16.34% of the samples, respectively. The concentration of PTE in soil exhibited a strong/moderate variation. The assessment of IICQs demonstrated that approximately 74.85% of the samples exhibited varying degrees of exceedance, with 33.42% of the polluted samples originating from Bijie City. Overall, the IICQs showed a clear downward trend from west to east along the flow direction of the Wujiang River Basin. According to BME theory, the area of PTE contamination risk area was 68.63% of the study area. Among them, 2.95%, 4.23%, and 8.32% of the risk area were at 95%, 90%, and 75% confidence levels, respectively. These areas were distributed in Hezhang County, Zhijin County, and Qianxi County of Bijie City and a small part of southern Zunyi City and central Guiyang City. The primary factors influencing the concentration of PTE in agricultural soil were the activities associated with metal mining and smelting. The results of the study provide a reasonable classification system and suggestions for the prevention and control of PTE pollution in farmland soils in the Wujiang River Basin of Guizhou Province.
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