Distribution of cadmium and lead in soil-rice systems and their environmental driving factors at the island scale
文献类型：期刊论文
| 作者 | Guo, Yan2,3; Yang, Yi2,3; Li, Ruxia2,3; Liao, Xiaoyong3; Li, Yonghua1,3 |
| 刊名 | ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
 |
| 出版日期 | 2023-10-15 |
| 卷号 | 265页码:11 |
| 关键词 | Cadmium Lead Soil -rice systems Driving factors Distribution patterns |
| ISSN号 | 0147-6513 |
| DOI | 10.1016/j.ecoenv.2023.115530 |
| 通讯作者 | Li, Yonghua(yhli@igsnrr.ac.cn) |
| 英文摘要 | Toxic elements, such as Cd and Pb are of primary concern for soil quality and food security owing to their high toxicity and potential for bioaccumulation. Knowledge of the spatial variability of Cd and Pb in soil-rice systems across the landscape and identification of their driving factors are prerequisites for developing appropriate management strategies to remediate or regulate these hazardous contaminants. Considering the role of rice (Oryza sativa) as a dietary staple in China, this study aimed to examine the distribution patterns and drivers of Cd and Pb in tropical soil-rice systems across Hainan Island. To achieve this goal, 229 pairs of representative paddy soil and rice samples combined with a set of environmental covariates at the island scale were systematically analyzed. Arithmetic mean values (AMs) of Cd and Pb in rice were 0.080 and 0.199 mg kg -1, and exceeded the standard limits by 27.1% and 22.7%, respectively. We found that the AMs of Cd and Pb concentrations in paddy soil were 0.294 and 43.0 mg kg -1. Additionally, Cd in 29.26% of soil samples and Pb in 11.35% of soil samples exceeded the risk screening value for toxic elements. The enrichment factor generally showed that soil Cd and Pb on Hainan Island were both moderately enriched. Results obtained from both Spearman's correlation and stepwise regression analyses suggest that the concentrations of soil Cd and Pb are significantly influenced by the soil Na and Fe concentrations. Specifically, an increment of 1 g kg -1 in soil Na caused a rise of soil Cd and Pb by 57.1 mg kg -1 and 34.4 mg kg -1, respectively, while an increase of 1 g kg -1 in soil Fe resulted in a rise by 25.0 mg kg -1 and 14.5 mg kg -1. Similarly for rice grains, an increment of 1 g kg -1 in soil Ca resulted in a rise of rice Pb by 30.8 mg kg -1, whereas an increase of 1 g kg -1 in soil Mg led to a decrease in rice Pb by 14.8 mg kg -1. However, no significant correlation between soil Se and rice Cd concentrations was found. Furthermore, the result of geographically weighted regression revealed that the impacts of soil Na, Ca, Fe, and Mg on rice Cd were more significant in the western region, whereas the effects of soil Na and Fe on rice Pb were stronger in the northeastern region. This study provides new insights for the identification of factors influencing the distribution and accumulation of Cd and Pb in tropical island agroecosystems. |
| WOS关键词 | POTENTIALLY TOXIC ELEMENTS ; HEAVY-METALS ; SPATIAL-DISTRIBUTION ; ACCUMULATION ; BIOCHAR ; CHINA ; IMMOBILIZATION ; QUALITY ; GRAINS ; WHEAT |
| 资助项目 | National Natural Science Foundation of China[42225707] |
| WOS研究方向 | Environmental Sciences & Ecology ; Toxicology |
| 语种 | 英语 |
| WOS记录号 | WOS:001088587800001 |
| 出版者 | ACADEMIC PRESS INC ELSEVIER SCIENCE |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/199131]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Li, Yonghua |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, 11 A Datun Rd, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Guo, Yan,Yang, Yi,Li, Ruxia,et al. Distribution of cadmium and lead in soil-rice systems and their environmental driving factors at the island scale[J]. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY,2023,265:11. |
| APA | Guo, Yan,Yang, Yi,Li, Ruxia,Liao, Xiaoyong,&Li, Yonghua.(2023).Distribution of cadmium and lead in soil-rice systems and their environmental driving factors at the island scale.ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY,265,11. |
| MLA | Guo, Yan,et al."Distribution of cadmium and lead in soil-rice systems and their environmental driving factors at the island scale".ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 265(2023):11. |
入库方式： OAI收割
来源：地理科学与资源研究所
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