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
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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