https://scholars.lib.ntu.edu.tw/handle/123456789/606034
標題: | Soil gallium speciation and resulting gallium uptake by rice plants | 作者: | Chen K.-Y Yang P.-T Chang H.-F Yeh K.-C Wang S.-L. SHAN-LI WANG |
關鍵字: | Chemical speciation;Gallium;Plant uptake;Rice plant;Soil availability;Cultivation;Gallium compounds;Health risks;Iron compounds;Soil pollution;Textures;X ray absorption;X ray absorption near edge structure spectroscopy;Contaminated soils;Emerging contaminant;High tech industry;Oryza sativa L;Rice cultivation;Rice grains;Rice plants;Rice roots;Soils;ferric hydroxide;gallium;organic carbon;cadmium;bioaccumulation;crop plant;pollutant;public health;rice;sequential extraction;soil texture;speciation (chemistry);Arabidopsis thaliana;Article;chemical structure;endosperm;grain;laser ablation inductively coupled plasma mass spectrometry;nonhuman;plant growth;plant root;sandy loam;seedling;shoot;soil acidity;soil moisture;soil pollution;soil property;species differentiation;surface soil;chemistry;Oryza;pollution;soil;soil pollutant;Oryza sativa;Cadmium;Environmental Pollution;Plant Roots;Soil;Soil Pollutants | 公開日期: | 2022 | 卷: | 424 | 來源出版物: | Journal of Hazardous Materials | 摘要: | Gallium (Ga) is widely used in high-tech industries and is an emerging contaminant in the environment. This study aimed to determine Ga speciation in soils and Ga accumulation in rice plants (Oryza sativa L.) grown in three Ga-contaminated soils. The results showed that, among the soils, the acidic soil with a coarse texture had the highest soil Ga availability, which enhanced Ga uptake by rice roots. The Ga K-edge X-ray absorption near edge structure and sequential extraction results of the soils showed that the predominant species of Ga associated with iron hydroxides transformed to Ga(OH)3 precipitates, and the residue fraction increased with rice-growing time, resulting in lower Ga uptake by rice roots in the second half period of rice cultivation. A large fraction of Ga was accumulated in the rice roots, with only a small portion of Ga was transferred to the shoots and then to the rice grains. This study revealed that Ga speciation in soil-rice plant systems varied during rice cultivation and determined soil Ga availability to rice plants. Gallium accumulated in rice grains is distributed homogenously in the endosperm of the grains, suggesting a potential risk to public health via the intake of rice grains harvested from Ga-contaminated paddy fields. ? 2021 Elsevier B.V. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85118537802&doi=10.1016%2fj.jhazmat.2021.127582&partnerID=40&md5=6c05a3c5e281f49710ce3fe57cd2784e https://scholars.lib.ntu.edu.tw/handle/123456789/606034 |
ISSN: | 03043894 | DOI: | 10.1016/j.jhazmat.2021.127582 |
顯示於: | 農業化學系 |
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