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Distribution, behavior, and risk assessment of chlorinated paraffins in paddy plants throughout whole growth cycle
Stockholm University, Faculty of Science, Department of Environmental Science. Norwegian University of Science and Technology, Norway .ORCID iD: 0000-0002-2043-8128
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Number of Authors: 102022 (English)In: Environment International, ISSN 0160-4120, E-ISSN 1873-6750, Vol. 167, article id 107404Article in journal (Refereed) Published
Abstract [en]

Paddy plants provide staple food for 3 billion people worldwide. This study explores the environmental fate and behavior of a high-volume production emerging contaminants chlorinated paraffins (CPs) in the paddy ecosystem. Very-short-, short-, medium-, and long-chain CPs (vSCCPs, SCCPs, MCCPs, and LCCPs, respectively) were analyzed in specific tissue of paddy plants at four main growth stages and soils from the Yangtze River Delta, China throughout a full rice growing season. The total CP concentrations in the paddy roots, stalks, leaves, panicles, hulls, rice, and soils ranged from 181 to 1.74 × 103, 21.7–383, 19.6–585, 108–332, 245–470, 59.6–130, and 99.6–400 ng/g dry weight, respectively. The distribution profile indicated the translocation of SCCPs and MCCPs from soils to paddy tissue, highlighting their elevated bioaccumulative potential. The evolution of CP level/mass/pattern during the whole growth cycle suggested atmospheric CPs deposition on leaves and hulls, as well as stalk-rice transfer. CSOIL plant uptake model well predicted the level, distribution pattern, and bioconcentration factors (BCFs) of SCCPs and MCCPs in paddy shoot and recognized the soil-air-shoot pathway as the major contributor. Moreover, risk evaluation indicated that MCCPs intake and subsequent risks dominated the total exposure to CPs via rice ingestion. This is the first report on the occurrence, fate and risk assessment of all CPs classes in paddy ecosystems, and the results underline the potential health effects caused by the in-use MCCPs via rice ingestion.

Place, publisher, year, edition, pages
2022. Vol. 167, article id 107404
Keywords [en]
Paddy ecosystem, Chlorinated paraffins, Tissue distribution, Plant uptake modeling, Rice ingestion risks
National Category
Earth and Related Environmental Sciences Agricultural Science, Forestry and Fisheries
Identifiers
URN: urn:nbn:se:su:diva-210303DOI: 10.1016/j.envint.2022.107404ISI: 000855690000001PubMedID: 35868077Scopus ID: 2-s2.0-85134667931OAI: oai:DiVA.org:su-210303DiVA, id: diva2:1702534
Available from: 2022-10-11 Created: 2022-10-11 Last updated: 2022-10-11Bibliographically approved

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Yuan, Bo

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