Airborne lead: A vital factor influencing rice lead accumulation in China
Autor: | Qi, Lin, Wei, Dai, Jun-Qiao, Chen, Yu, Jin, Yue, Yang, Yi-Yi, Wang, Bao-Feng, Zhang, Jia-Ming, Fan, Li-Ping, Lou, Zhen-Guo, Shen, Chao-Feng, Shen, Jing-Dong, Mao |
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Rok vydání: | 2022 |
Předmět: | |
Zdroj: | Journal of Hazardous Materials. 427:128169 |
ISSN: | 0304-3894 |
DOI: | 10.1016/j.jhazmat.2021.128169 |
Popis: | Traditionally, lead (Pb) in rice grains has been thought to be mostly derived from soil, and the contribution of aerosol Pb remains so far unknown. Based on a meta-analysis, we surprisingly found rice Pb content decreased proportionally with urban atmospheric Pb concentrations in major rice-growing provinces in China during 2001-2015, suggestive of the strong influence of long-range Pb transport on agricultural environment. With the combination of field survey, field experiment, as well as a predictive model, we confirmed high contribution of atmospheric exposure to rice grain Pb in China. We for the first time developed a predictive mathematical model which revealed that aerosol Pb accumulation ratios of rice grains were related to both grain weight and accumulation types. We successfully predicted the national-scale rice Pb in China on the basis of the public data of urban PM |
Databáze: | OpenAIRE |
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