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| Distribution of Cd，Hg and Pb in some whole rice plants and its accumulating features in the Taihu Lake areas，Jiangsu |
| Received:April 09, 2024 |
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| KeyWord:whole rice plant;Cd;Hg;Pb;distribution;accumulating features;Taihu Lake areas in Jiangsu Province |
| Author Name | Affiliation | E-mail | | LI Wenbo | Innovation Center for Ecological Monitoring & Restoration Project on Land(Arable), Ministry of Natural Resources, Geological Survey of Jiangsu Province, Nanjing 210018, China | | | LIAO Qilin | Innovation Center for Ecological Monitoring & Restoration Project on Land(Arable), Ministry of Natural Resources, Geological Survey of Jiangsu Province, Nanjing 210018, China | 1043034588@qq.com | | FAN Jian | Innovation Center for Ecological Monitoring & Restoration Project on Land(Arable), Ministry of Natural Resources, Geological Survey of Jiangsu Province, Nanjing 210018, China | | | HUANG Shunsheng | Innovation Center for Ecological Monitoring & Restoration Project on Land(Arable), Ministry of Natural Resources, Geological Survey of Jiangsu Province, Nanjing 210018, China | | | REN Jinghua | Innovation Center for Ecological Monitoring & Restoration Project on Land(Arable), Ministry of Natural Resources, Geological Survey of Jiangsu Province, Nanjing 210018, China | | | CUI Xiaodan | Innovation Center for Ecological Monitoring & Restoration Project on Land(Arable), Ministry of Natural Resources, Geological Survey of Jiangsu Province, Nanjing 210018, China | | | LIU Weijing | Innovation Center for Ecological Monitoring & Restoration Project on Land(Arable), Ministry of Natural Resources, Geological Survey of Jiangsu Province, Nanjing 210018, China | | | XU Hongting | Innovation Center for Ecological Monitoring & Restoration Project on Land(Arable), Ministry of Natural Resources, Geological Survey of Jiangsu Province, Nanjing 210018, China | |
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| Abstract: |
| In order to effectively prevent and control heavy metals pollution in cultivated land, 42 sets of the whole rice samples were collected and tested in the Taihu Lake areas in Jiangsu Province, and the systematic analyses and generation were conducted on these geochemical survey data newly obtained about Cd, Hg and Pb and other eco-environmental indicators within the soil and plants. By studying and generating their distribution characteristics and correlations between some geochemical indicators in soil and rice plants including roots, straws, stalks, leaves, shoots, chaffs and brown rice, and so on, and the distribution and enriched features have been explored or discussed in this paper related to Cd, Hg and Pb in those whole rice plants. The main studied results showed as follows：In the studied areas, there were significant differences in the distribution and enrichment of Cd, Hg and Pb, and the enriched ability of the brown rice was the relative weakest in the whole rice plants. As to Cd, Hg and Pb, the strongest ability to absorb heavy metals was Cd in rice, and the bioconcentratiton factors（BCF）of Cd were 35 times higher than Hg and 42 times higher than Pb in the whole rice plants. The distributive characteristics of Cd showed a significant unidirectional gradual decrease trend in the whole rice plants, from roots to straws, to stalks, to leaves, to shoots, to chaffs, and to brown rice, the mean values of Cd concentrations gradually decreased from 10.61 mg·kg-1 to 0.62 mg·kg-1, the mean value of their BCF decreased from 5.941 to 0.325, and there were the significant positive correlations between the Cd contents of each rice organ and other one in the whole rice plants, and the Cd enrichment in the brown rice was mainly controlled by some geochemical indicators in soil as to Cd, pH, TOC, etc., or Cd in the brown rice may be from roots absorption mainly. The Hg distribution in the whole rice plants showed relative enrichment to leaves and roots, and the mean values of Hg concentrations from above stated every rice organs ranged from 0.004 4 mg·kg-1 to 0.027 6 mg·kg-1, and the mean values of their BCF ranged from 0.020 to 0.124, and the ranking orders of the Hg enriched degree were the brown rice-1 to 8.25 mg·kg-1, and their mean values of BCF ranged from 0.002 to 0.178, and their Pb enriched degree ranking sequence were the brown rice |
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