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| Study on Chemical Speciation Analysis Method of Fluorine in Soil |
| Received:October 31, 2023 Revised:February 20, 2024 |
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| DOI：10.3969/j.issn.2095-1035.2024.07.011 |
| KeyWord:Soil; Fluorine; Chemical speciation analysis |
| Author | Institution |
| Men Qian-Ni |
中国地质调查局西安矿产资源调查中心 |
| Feng Bo-Xin |
中国地质调查局西安矿产资源调查中心 |
| Gan Li-Ming |
中国地质调查局西安矿产资源调查中心 |
| Huang Xin |
中国地质调查局西安矿产资源调查中心 |
| Deng Pan-Zhi |
中国地质调查局西安矿产资源调查中心 |
| He Tao |
中国地质调查局西安矿产资源调查中心 |
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| Abstract: |
| Fluorine is an essential trace element closely related to human health, and insufficient or excessive intake of fluoride by the human body may lead to health problems. Identifying the occurrence forms of fluoride in soil is of great significance for understanding the bioavailability, migration and transformation patterns of fluoride, and preventing potential ecological and health problems caused by fluoride deficiency or excess. Through discussion, the morphology of fluorine was divided into water-soluble, adsorbed, oxidized bound, and fixed states. We focused on studying the effects of solid-liquid ratio, ultrasound time, and ultrasound temperature on the extraction of water-soluble fluoride. The optimal extraction conditions were determined to be a solid-liquid ratio of 10:1, ultrasound time of 30 minutes, and ultrasound temperature of 25 ± 5 ℃. Under these conditions, the order of weakly acidic (H2C2O4) and weakly alkaline (NaHCO3) extractants and the effects of different concentrations of NH3OHCl-C2H4O2 extractants on the extraction of adsorbed and oxidized bound fluoride were studied. The results showed that the pH of the soil had a certain impact on the extraction of adsorbed fluoride, |
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