Potential toxic heavy metals in rhizosphere soils and crops under a black shale high geological background: pollution characteristics, ditribution, and risk assessment

Potential toxic heavy metals in rhizosphere soils and crops under a black shale high geological background: pollution characteristics, ditribution, and risk assessment | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Potential toxic heavy metals in rhizosphere soils and crops under a black shale high geological background: pollution characteristics, ditribution, and risk assessment Luyuan Chen, Bozhi Ren, Xinping Deng, Wei Yin, Qing Xie, Zhaoqi Cai, and 1 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4113986/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract The Lou-Shao Basin in Hunan Province, as a high geological background area, contains two sets of black rock series rich in various potential toxic heavy metal elements. These rock series are rich in various potential toxic heavy metal elements such as cadmium, lead, zinc, copper, vanadium, nickel, etc. This paper selects the soil and crops in the core arable land area under high geological background as the research object and analyzes the current status of heavy metal element pollution in non-rhizosphere soil, rhizosphere soil, and major crops. The research results show that due to the weathering of black shale into soil, the content of heavy metal elements (such as Cd, Ni, Cu, As, Hg, Pb, and Mn) is significantly higher, exceeding the background values of elements in Hunan, making it a typical high geological background area. The Igeo level of the heavy metal element chromium (Cr) is relatively high in all crops (maize Igeo=6.71), indicating serious pollution. The pollution situation of other elements varies with different crops, consistent with the Pollution Load Index (PLI) results. The spatial distribution of heavy metal pollution in crops shows a strong spatial pattern, with high-value areas concentrated in the southeastern region. The ecological risk of each element in soil samples is Cr > Mn > Cd > As > Se, while in crop samples it is Se > Cd > Cr > As > Pb > Hg. Human health risk assessment indicates that humans may be exposed to these heavy metals through skin contact and food chain intake. The hazard index (HI value) of the heavy metal element Cd is greater than 1, and the potential carcinogenicity of Cd may lead to related diseases such as kidney stones, posing a higher risk to children. Lou-Shao Basin high geological background potential toxic heavy metals rhizosphere and non-rhizosphere soil crops risk assessment Full Text Additional Declarations No competing interests reported. Supplementary Files Highlights.doc Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-4113986","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":281016478,"identity":"8e54d828-f28d-416b-ad0c-b16a21dbb449","order_by":0,"name":"Luyuan Chen","email":"","orcid":"","institution":"Hunan University of Science and Technology","correspondingAuthor":false,"prefix":"","firstName":"Luyuan","middleName":"","lastName":"Chen","suffix":""},{"id":281016479,"identity":"4a820799-ee65-409d-84c1-383877a1607c","order_by":1,"name":"Bozhi 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soil, crops, risk assessment","lastPublishedDoi":"10.21203/rs.3.rs-4113986/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-4113986/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eThe Lou-Shao Basin in Hunan Province, as a high geological background area, contains two sets of black rock series rich in various potential toxic heavy metal elements. These rock series are rich in various potential toxic heavy metal elements such as cadmium, lead, zinc, copper, vanadium, nickel, etc. This paper selects the soil and crops in the core arable land area under high geological background as the research object and analyzes the current status of heavy metal element pollution in non-rhizosphere soil, rhizosphere soil, and major crops. The research results show that due to the weathering of black shale into soil, the content of heavy metal elements (such as Cd, Ni, Cu, As, Hg, Pb, and Mn) is significantly higher, exceeding the background values of elements in Hunan, making it a typical high geological background area. The Igeo level of the heavy metal element chromium (Cr) is relatively high in all crops (maize Igeo=6.71), indicating serious pollution. The pollution situation of other elements varies with different crops, consistent with the Pollution Load Index (PLI) results. The spatial distribution of heavy metal pollution in crops shows a strong spatial pattern, with high-value areas concentrated in the southeastern region. The ecological risk of each element in soil samples is Cr \u0026gt; Mn \u0026gt; Cd \u0026gt; As \u0026gt; Se, while in crop samples it is Se \u0026gt; Cd \u0026gt; Cr \u0026gt; As \u0026gt; Pb \u0026gt; Hg. Human health risk assessment indicates that humans may be exposed to these heavy metals through skin contact and food chain intake. The hazard index (HI value) of the heavy metal element Cd is greater than 1, and the potential carcinogenicity of Cd may lead to related diseases such as kidney stones, posing a higher risk to children.\u003c/p\u003e","manuscriptTitle":"Potential toxic heavy metals in rhizosphere soils and crops under a black shale high geological background: pollution characteristics, ditribution, and risk assessment","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2024-03-20 08:19:19","doi":"10.21203/rs.3.rs-4113986/v1","editorialEvents":[{"type":"communityComments","content":0}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true}}],"origin":"","ownerIdentity":"7501a4c4-84bc-4306-8a14-34bddd2461fa","owner":[],"postedDate":"March 20th, 2024","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"posted","subjectAreas":[],"tags":[],"updatedAt":"2024-03-20T18:29:41+00:00","versionOfRecord":[],"versionCreatedAt":"2024-03-20 08:19:19","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-4113986","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-4113986","identity":"rs-4113986","version":["v1"]},"buildId":"qtupq5eGEP_6zYnWcrvyt","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}